Acetone Conversion Research Articles

Boosting the catalytic performance of MnOx in acetone oxidation by weakening the Mn[sbnd]O bond strength

Manganese oxides (MnOx) exhibit considerable potential in the catalytic degradation of volatile organic compounds (VOCs) due to their excellent catalytic activity, superior stability and economic cost. In this work, a two-step calcination strategy was developed to prepare MnOx/CeO2 catalysts with low MnO bond strengths and highly active lattice oxygens. The obtained Mn4Ce1-NA after the optimization has a smaller grain size, enhanced specific surface area and weakened MnO bonds, which is attributed to the in situ restriction of the manganese oxides by the two-step calcination. Moreover, the entrance of Ce into the MnOx lattice further weakened the MnO bonds, leading to superior low-temperature reducibility and lattice oxygen activity, which effectively promoted the catalytic activity of the catalysts. The optimal samples displayed outstanding acetone degradation performance, capable of completing 90 % acetone conversion at 172 °C. The catalyst also exhibits excellent stability, with the conversion of acetone maintained at around 95 % for 64 h. This work contributes to a deeper understanding of reactive oxygen species in the catalytic oxidation of VOCs, while providing a new strategy for the rational design of efficient catalysts for the oxidation of VOCs.

Tailoring of the Properties of Amorphous Mesoporous Titanosilicates Active in Acetone Condensation.

Amorphous mesoporous materials are promising as catalysts for processes involving or forming bulk molecules. In a reaction such as acetone condensation to form mesitylene, an effective catalyst should not only have a developed porous structure but also have active centers of acidic and basic types. The sol-gel approach allows one to obtain titanosilicates with such characteristics. This work demonstrates the possibility of controlling their properties by varying the conditions for the synthesis of titanosilicate gels. It has been established that controlling hydrolysis allows one to increase the activity of amorphous mesoporous titanosilicates by 10 times: from acetone conversion of 6% to 60%. It has been shown that the use of titanium acetylacetonate complexes in the synthesis of gels leads to an increase in the content of tetracoordinated Ti in the structure and contributes to an increase in the acidity of titanosilicates. During the condensation of acetone on the obtained mesoporous titanosilicates, high acetone conversion (60-79%) and mesitylene selectivity of up to 83% were achieved.

Optimizing propylene production via acetone hydrodeoxygenation: Insights from catalytic studies with Cu/γ-Al2O3 and Hβ zeolite

Propylene is a crucial light olefin in the petrochemical industry and can be produced via acetone hydrodeoxygenation, which involves two sequential reactions: first, acetone undergoes hydrogenation catalyzed by metallic sites, followed by the dehydration of the resulting isopropanol catalyzed by acidic sites. In this study, propylene production through acetone hydrodeoxygenation was investigated using a physical mixture of 35 wt% Cu/γ-Al2O3 and Hβ zeolite to investigate how various reaction parameters affect acetone conversion and propylene yield. Using the experimental design methodology, empirical models were developed to correlate acetone conversion (Xacet) and propylene yield (Yprop) with the ratio of 35 wt% Cu/γ-Al2O3 to Hβ (CR), total catalyst weight (Cw), hydrogen volumetric flow rate (FH2) and reaction temperature (T). The maximum propylene yield achieved in the catalytic tests was 73.46 %. A long-term test demonstrated the catalyst's reusability, remaining active even after 22 hours of reaction with only a slight decrease in propylene yield. Analysis of the experimental data revealed that increasing T and Cw positively affected propylene yield, whereas higher CR and FH2 had negative effects. According to the Pareto chart, reaction temperature was the most influential variable for propylene yield, followed by CR, FH2 and Cw. For acetone conversion, the order of significance among the variables was T >CR >Cw >FH2.

Effects of organic ligands and photoactive substances on MOFs-derived Co3O4@MnOx hollow-sphere structure for efficient energy transfer and photothermocatalysis of acetone and NO

A set of MOFs-derived Co3O4@MnOx hollow-sphere were synthesized to develop a catalyst for the photothermal catalytic removal of NO using acetone as a reducing agent. The study systematically investigated the impact of organic ligands and photoactive substances on energy transfer and photothermocatalytic reactions involving acetone and NO under 5 vol % H2O with the catalysts. At 240°C, sample C-5/1 (with an organic ligand added and Co/Mn molar ratio of 5/1) demonstrated 75 % NO conversion and 65 % acetone conversion. The highest catalytic performance was observed in the L-Py sample (with photoactive substance was added), achieving 80 % NO and 69 % acetone conversion at 240°C. The catalyst demonstrated low crystallinity, and the introduction structural defects through ligands adjusted the ratio of active components. Meanwhile, enhanced catalytic performance was attributed to light energy scattering in the inner space of microspheres, resulting in the efficient transfer of 2.17 eV energy with the addition of two photoactive substances. The elevated concentration of surface-active oxygen facilitated oxidation, while Mn/Mn+1 (Mn3+/Mn4+ and Co2+/Co3+) redox cycling supplied surface oxygen in the photothermal low-temperature response. The proposed mechanism for the simultaneous degradation of acetone and NO was elucidated using Density Functional Theory calculations.

Catalytic conversion of acetone and n-butanol over metal incorporated hydrotalcite-derived oxides catalysts

The catalytic activity/selectivity of copper, silver, and silver-copper incorporated thermally treated hydrotalcite catalysts prepared at different temperatures were investigated in the continuous gas phase aldol condensation reaction between acetone and n-butanol. The synthesized catalysts were characterized by gas adsorption analysis, X-ray diffraction (XRD), ultraviolet–visible diffuse reflectance spectroscopy (DR-UV), temperature-programmed reduction with hydrogen (H2-TPR), temperature-programmed desorption of carbon dioxide (CO2-TPD) and scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS). A mixture of several condensation products was produced by the cross- and self-aldol condensation reactions. Incorporation of copper, silver and silver-copper into thermally treated hydrotalcite can enhance the catalytic activity and selectivity of compounds with carbon number 11 (C11), especially over silver-copper incorporated thermally treated hydrotalcite catalysts at 800 °C (AgCu/HT800).

Electrifying Chemistry: Characterizing TEMPO-Based Electrocatalysts for Isopropanol to Acetone Conversion in Novel Heat Pumps

Heating, ventilation, and air conditioning (HVAC) systems account for more than 40% of the U.S. electricity usage, primarily utilizing vapor compression system (VCS) heat pumps, raising environmental concerns. The phase down of high GWP refrigerants, targeting an 85% reduction by 2035, prompts the exploration of novel heat pump technologies. Electrochemical looping heat pumps (ELHP) show promise by employing redox reactions for fluid compression to replace conventional compression technologies. However, energy-intensive redox interconversion necessitates catalysts to lower activation energy. Inspired by electrosynthesis principles, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) emerged as a successful homogeneous electrocatalyst for selective isopropanol oxidation to acetone for use in ELHP. HPLC and 13C NMR confirmed remarkable selectivity (~100%) at practical isopropanol concentrations.To enhance TEMPO's catalytic activity, various electron-withdrawing and donating groups were explored. TEMPO-OCH3, among seven derivatives, exhibited superior efficiency with a notable rate constant (6 M-1s-1) and turnover frequency (3.1 s-1). This study innovatively applies concepts from molecular catalysis for the development of efficient catalyst materials.

Performance and Mechanism of Co and Mn Loaded on Fe-Metal-Organic Framework Catalysts with Different Morphologies for Simultaneous Degradation of Acetone and NO by Photothermal Coupling.

VOCs can be used instead of ammonia as a reducing agent to remove NO, achieving the effect of removing VOCs and NO simultaneously. Due to the high energy consumption and low photocatalytic efficiency required for conventional thermocatalytic purification, photothermal coupled catalytic purification can integrate the advantages of photocatalysis and thermocatalysis in order to achieve the effect of pollutants being treated efficiently with a low energy consumption. In this study, samples loaded with Co and Mn catalysts were prepared using the hydrothermal method on Fe-MOF with various morphologies. The catalytic performance of each catalyst was analyzed by studying the effects of their physicochemical properties through various characterizations, including XRD, SEM, BET, XPS, H2-TPR, TEM and O2-TPD. The characterization results demonstrated that the specific surface area, pore volume, high valence Co and Mn atoms, surface adsorbed oxygen and the abundance of oxygen lattice defects in the catalysts were the most critical factors affecting the performance of the catalysts. Based on the results of the performance tests, the catalysts prepared with an octahedral-shaped Fe-MOF loaded with Co and Mn showed a better performance than those loaded with Co and Mn on a rod-shaped Fe-MOF. The conversions of acetone and NO reached 50% and 64%, respectively, at 240 °C. The results showed that the catalysts were capable of removing acetone and NO at the same time. Compared with the pure Fe-MOF without Co and Mn, the loaded catalysts showed a significantly higher ability to remove acetone and NO simultaneously under the combination of various factors. The key reaction steps for the catalytic conversion of acetone and NO on the catalyst surface were investigated according to the Mars-van Krevelen (MvK) mechanism, and a possible mechanism was proposed. This study presents a new idea for the simultaneous removal of acetone and NOx by photothermal coupling.

Sulfonic acid functionalized SBA−15 catalyst and mercaptopropionic acid promotor for the selective synthesis of p,p′−bisphenol A: Replacement to mineral acid−based process

The significance of selective catalysis in producing plastic monomers is crucial to meet sustainability and economic requirements. It is essential to develop a selective solid acid catalyst to replace irrecoverable corrosive mineral acids and thermolabile sulfonated resins for the production of p,p′−bisphenol A (BPA) isomer, a key intermediate in polycarbonate production. However, limited success has been achieved due to low activity and selectivity towards the desired p,p′−BPA isomer. Herein, a mild and selective route is presented for producing p,p′−BPA using SBA-15 functionalized sulfonic acid catalysts. Sulfonic acid-based catalysts with and without alkyl chain linkers, supported on SBA−15, were synthesized to evaluate the effect of acidity, and textual properties on the catalytic efficiency, and product selectivity. Among all the synthesized catalysts, SBA−15−Pr−SO3H exhibited the highest product selectivity. The addition of mercaptopropionic acid (as a promoter) enhanced the catalytic efficiency and afforded ∼99% acetone conversion, with 97.3% p,p′−BPA selectivity. A detailed mechanism with and without the promoter is proposed. The study also highlights the potential of mesoporous SBA−15−supported sulfonic acid catalysts as a selective and efficient catalyst for synthesizing bisphenol derivatives from the lignocellulose biomass−derived platform molecules, addressing challenges posed by fossil resources.

Light-induced in-situ transformation from MOF to construct heterostructured Co3O4/Co catalyst for efficient photothermal catalytic oxidation

The construction of hybrid nanocatalysts with enhanced active surfaces/interfaces is crucial for the catalytic oxidative removal of volatile organic compounds (VOCs). In this study, we report an in-situ conversion approach to synthesize a heterostructured Co3O4/Co catalyst (Co@NC-0.5) for efficient photothermal catalytic oxidation of acetone. The catalysts were prepared by pyrolyzing a mixture of ZIF-67 and melamine. The exposed cobalt species underwent in-situ oxidation to form a Co3O4/Co heterostructure under photothermal conditions. This unique catalyst structure exhibited over 90 % conversion within 16 min under full solar spectrum irradiation and excellent reusability with continuous maintenance of 100 % acetone conversion rate after nine cycles performance tests. Notably, its specific mass activity under thermocatalytic conditions was 2.13 times higher than that of Co3O4. Our work provides a facile and effective strategy for developing highly active and durable non-precious metal catalysts suitable for various photothermal catalytic reactions.

Isopropanol production via the thermophilic bioconversion of sugars and syngas using metabolically engineered Moorella thermoacetica

BackgroundIsopropanol (IPA) is a commodity chemical used as a solvent or raw material for polymeric products, such as plastics. Currently, IPA production depends largely on high-CO2-emission petrochemical methods that are not sustainable. Therefore, alternative low-CO2 emission methods are required. IPA bioproduction using biomass or waste gas is a promising method.ResultsMoorella thermoacetica, a thermophilic acetogenic microorganism, was genetically engineered to produce IPA. A metabolic pathway related to acetone reduction was selected, and acetone conversion to IPA was achieved via the heterologous expression of secondary alcohol dehydrogenase (sadh) in the thermophilic bacterium. sadh-expressing strains were combined with acetone-producing strains, to obtain an IPA-producing strain. The strain produced IPA as a major product using hexose and pentose sugars as substrates (81% mol-IPA/mol-sugar). Furthermore, IPA was produced from CO, whereas acetate was an abundant byproduct. Fermentation using syngas containing both CO and H2 resulted in higher IPA production at the specific rate of 0.03 h−1. The supply of reducing power for acetone conversion from the gaseous substrates was examined by supplementing acetone to the culture, and the continuous and rapid conversion of acetone to IPA showed a sufficient supply of NADPH for Sadh.ConclusionsThe successful engineering of M. thermoacetica resulted in high IPA production from sugars. M. thermoacetica metabolism showed a high capacity for acetone conversion to IPA in the gaseous substrates, indicating acetone production as the bottleneck in IPA production for further improving the strain. This study provides a platform for IPA production via the metabolic engineering of thermophilic acetogens.

Effect of Donor Nb(V) Doping on the Surface Reactivity, Electrical, Optical and Photocatalytic Properties of Nanocrystalline TiO2.

In this work, we primarily aimed to study the Nb(V) doping effect on the surface activity and optical and electrical properties of nanocrystalline TiO2 obtained through flame-spray pyrolysis. Materials were characterized using X-ray diffraction, Raman spectroscopy and IR, UV and visible spectroscopy. The mechanism of surface reaction with acetone was studied using in situ DRIFTs. It was found that the TiO2-Nb-4 material demonstrated a higher conversion of acetone at a temperature of 300 °C than pure TiO2, which was due to the presence of more active forms of chemisorbed oxygen, as well as higher Lewis acidity of the surface. Conduction activation energies (Eact) were calculated for thin films based on TiO2-Nb materials. The results of the MB photobleaching experiment showed a non-monotonic change in the photocatalytic properties of materials with an increase in Nb(V) content, which was caused by a combination of factors, such as specific surface area, phase composition, concentration of charge carriers as well as their recombination due to lattice point defects.

Homologous acetone carboxylases select Fe(II) or Mn(II) as the catalytic cofactor.

Acetone carboxylases (ACs) catalyze the metal- and ATP-dependent conversion of acetone and bicarbonate to form acetoacetate. Interestingly, two homologous ACs that have been biochemically characterized have been reported to have different metal complements, implicating different metal dependencies in catalysis. ACs from proteobacteria Xanthobacter autotrophicus and Aromatoleum aromaticum share 68% sequence identity but have been proposed to have different catalytic metals. In this work, the two ACs were expressed under the same conditions in Escherichia coli and were subjected to parallel chelation and reconstitution experiments with Mn(II) or Fe(II). Electron paramagnetic and Mössbauer spectroscopies identified signatures, respectively, of Mn(II) or Fe(II) bound at the active site. These experiments showed that the respective ACs, without the assistance of chaperones, second metal sites, or post-translational modifications facilitate correct metal incorporation, and despite the expected thermodynamic preference for Fe(II), each preferred a distinct metal. Catalysis was likewise associated uniquely with the cognate metal, though either could potentially serve the proposed Lewis acidic role. Subtle differences in the protein structure are implicated in serving as a selectivity filter for Mn(II) or Fe(II).IMPORTANCEThe Irving-Williams series refers to the predicted stabilities of transition metal complexes where the observed general stability for divalent first-row transition metal complexes increase across the row. Acetone carboxylases (ACs) use a coordinated divalent metal at their active site in the catalytic conversion of bicarbonate and acetone to form acetoacetate. Highly homologous ACs discriminate among different divalent metals at their active sites such that variations of the enzyme prefer Mn(II) over Fe(II), defying Irving-Williams-predicted behavior. Defining the determinants that promote metal discrimination within the first-row transition metals is of broad fundamental importance in understanding metal-mediated catalysis and metal catalyst design.

Boosting acetone hydrogenation at room temperature on Ru-Sn/C catalyst

Carbon supported Ru-Sn bimetallic catalyst shows excellent performance in room-temperature hydrogenation of acetone, 100% acetone conversion with 100% product selectivity to isopropyl alcohol can be achieved within a short reaction time. Catalyst structure-function relationship reveals a synergetic behavior between Ru and Sn sites, demonstrating the essential correlation between Sn/Ru atomic ratio and the resultant variation in catalytic performance. Room temperature hydrogenation of 4-heptanone was also studied, verifying the consistency of the established structure-function relationship in ketones hydrogenation reactions.

Performance and mechanism analysis of sludge-based biochar loaded with Co and Mn as photothermal catalysts for simultaneous removal of acetone and NO at low temperature.

Replacing NH3 in NH3-SCR with VOCs provides a new idea for the simultaneous removal of VOCs and NOx, but the technology still has urgent problems such as high cost of catalyst preparation and unsatisfactory catalytic effect in the low-temperature region. In this study, biochar obtained from sewage sludge calcined at different temperatures was used as a carrier, and different Co and Mn injection ratios were selected. Then, a series of sludge-based biochar (SBC) catalysts were prepared by a one-step hydrothermal synthesis method for the simultaneous removal of acetone and NO in a low-temperature photothermal co-catalytic system with acetone replacing NH3. The characterization results show that heat is the main driving force of the reaction system, and the abundance of Co and Mn atoms in high valence states, surface-adsorbed oxygen, and oxygen lattice defects in the catalyst are the most important factors affecting the performance of the catalyst. The performance test results showed that the optimal pyrolysis temperature of sludge was 400 °C, the optimal dosing ratio of Co and Mn was 4:1, and the catalyst achieved 42.98% and 52.41% conversion of acetone and NO, respectively, at 240 °C with UV irradiation. Compared with the pure SBC without catalytic effect, the SBC loaded with Co and Mn gained the ability of simultaneous removal of acetone and NO through the combined effect of multiple factors. The key reaction steps for the catalytic conversion of acetone and NO on the catalyst surface were investigated according to the Mars-van Krevelen (MvK) mechanism, and a possible mechanism was proposed. This study provides a new strategy for the resource utilization of sewage sludge and the preparation of photothermal catalysts for the simultaneous removal of acetone and NO at low cost.

New insight into opposite oxidation behavior in acetone and propane catalytic oxidation over CoMn based spinel oxides

CoMn spinel (CoMn) and Zn-substituted CoMn spinel (ZnCoMn) oxides were fabricated for revealing mechanism differences in acetone and propane catalytic oxidation. The temperature-conversion profiles, intrinsic reaction rate and activation energy convinced that CoMn and ZnCoMn exhibited high catalytic performance for acetone and propane oxidation, respectively. Experimental and theoretical investigation revealed that deep oxidation determined the acetone conversion, while the degradation of propane was governed by the fracture of C-H bond and subsequently the activation of C3H7. CoMn possessed more active lattice oxygen and superior oxygen activation capacity, allowing acetone to be directly converted into carboxylates without generating aldehydes. ZnCoMn with more high valence Mn species was conductive to the C-H bond dissociation and C3H7 activation. This work revealed the mutual relations between structure–property of the spinel oxides and reactivity of the diverse VOCs, which provided new insights for the rational design of spinel oxides for catalytic oxidation of diverse VOCs.

Selective synthesis of cumene from benzene and acetone: Design of tandem catalyst with hydrogenating and alkylating functions

Benzene hydroalkylation with acetone has been studied over tandem catalytic systems containing copper and zeolite components. The kinetic study in the wide range of acetone conversions allowed to determine the main reaction pathways leading to the target hydroalkylation products, cumene and diisopropylbenzenes, and to the by-products of acetone condensation. To prevent the side reaction pathways and to achieve high selectively towards target products, three strategies for assembling metal and zeolite components in the catalytic system were used: i) metal encapsulation in zeolite pores; ii) mortar mixing of copper supported on silica with zeolite component; iii) dual-bed layered arrangement of Cu/SiO2 and zeolite components. The best catalytic performance was achieved over dual-bed layered catalytic system, containing Cu/SiO2 in the upper layer and zeolite BEA in the bottom layer, which showed the highest yield of hydroalkylation products (93wt%) and stable catalyst operation.

Novel insight into the effect of relative humidity on the acetone photocatalytic decomposition using Ag−CeO2 under vacuum ultraviolet illumination: Catalytic synergies, performance, and mechanistic interpretation

The present work reports on the impact of relative humidity (RH) on the process of acetone oxidation in the absence and presence of Ag − CeO2 photocatalysts, including 185 nm vacuum UV (VUV) photolysis, ozonation, ozonation + 254 nm UV photolysis, and 254 nm UV photolysis treatment processes. The photocatalysts were evaluated by Raman, SEM, XRD, HRTEM, EPR, EDS, and XPS techniques. The information from characterization tests revealed that modification of ceria structure by the introduction of Ag nanoparticles increases the photocatalyst oxygen storage ability, which promotes the oxygen vacancies formation, resulting in the lattice oxygen activation. The attained data demonstrated the dual role of RH in the process of acetone oxidation under VUV irradiation. Compared to the dry condition, the introduction of RH = 25, 45, and 65% to the VUV photolysis system enhances the conversion of acetone remarkably from 40% to 60, 68, and 72%, respectively. However, the acetone oxidation did not change significantly in the presence of RH = 25–65% over the Ag − CeO2/VUV system. This observation confirms the dual role of RH; while RH boosted the gas phase photooxidation reactions, it poisoned the gas–solid interface, leading to an inhibitory effect on the catalytic oxidation reactions. Moreover, the results showed that the lower level of relative humidity (e.g., RH = 5%) over the Ag − CeO2 under VUV light not only enhances the acetone oxidation to 88% but also, through the participation of the catalytic ozonation, decomposed the formed O3 and increased the selectivity of the reaction towards complete oxidation up to 97%. The acetone oxidation mechanism was studied where the EPR results show that both.OH and.O2– contribute to acetone oxidation. Finally, the Ag − CeO2/VUV reusability was assessed in a way that the in-situ procedure for photocatalyst regeneration was utilized to inhibit the catalyst deactivation.

Tuning the Surface Mn/Al Ratio and Crystal Crystallinity of Mn–Al Oxides by Calcination Temperature for Excellent Acetone Low-Temperature Mineralization

Here, Mn–Al oxides with the strengthened synergistic effect of Mn and Al species were fabricated by facilely adjusting the calcination temperature with the hydrolysis-driven redox-precipitation method. Results demonstrated that the surface Mn/Al ratio and KMn8O16 phase can be effectively tamed under different calcination temperatures, which obviously alter the CO2 selectivity, reaction rate, and stability of Mn–Al oxides for catalytic oxidation of acetone, among which the Mn5Al-350 catalyst exhibits the best catalytic performance (90% of acetone converted at 159 °C) with CO2 selectivity higher than 99.5%, mainly owing to its higher surface Mn/Al ratio and weaker Mn–O bond with more Mn3+ as compared to Mn5Al-250, Mn5Al-450, and Mn5Al-550. Although a decrease in the consumption rate of acetic acid in the presence of 3.0 vol % H2O leads to the slight reduction of acetone conversion and CO2 yield, Mn5Al-350 still exhibits a superior catalytic stability. The reaction intermediates including acetaldehyde, ethanol, acetic acid, and formic acid species before total mineralization are determined by proton transfer reaction–mass spectrometry, theoretical calculations, and in situ DRIFTS. Theoretical calculations also reveal that the p-orbital interaction of C with a certain anisotropy leads to a weak catalytic effect in the process of acetic acid decomposition as the rate-limiting step.

Highly efficient acetone oxidation over homogeneous Mn-Al oxides with enhanced OMS-2 active phase

The homogeneous dispersed material with enhanced active species plays a dominant role in the catalytic activity. The Mn-Al oxides are facilely synthesized by the hydrolysis-driven redox-precipitation method. The OMS-2 active phase and surface properties can be effectively adjusted by Al/Mn molar ratio, which alters the acetone conversion and CO2 selectivity of prepared catalysts. Among them, MnAl0.15 exhibits the best catalytic performance (90% of acetone converted at 168 °C) with CO2 selectivity higher than 95%, mainly owing to its abundant Olatt and Mn3+with weaker Mn-O bond. Although the presence of H2O results in the slow consumption rate of acetic acid that leads to the slightly reduction of acetone conversion and CO2 yield, the MnAl0.15 still exhibits superior catalytic stability. The PTR-MS and in situ DRIFTS demonstrate that the acetone can firstly be oxidized to acetaldehyde and ethanol, and then further decomposed to acetic acid and formic acid before total mineralization.

Promoted Catalytic Properties of Acetone over Cerium-Modified Mullite Catalyst YMn2O5

Mullite catalysts have become one of the most widely studied catalysts due to their highly stable structure and unique coordination with oxygen. In this work, Ce-modified mullite-type oxides Y1-xCexMn2O5 have been prepared by sol-gel method to explore their Ce doping amount-dependent catalytic performance for acetone elimination. Experimental results confirm that Y0.9Ce0.1Mn2O5 had optimum acetone oxidation activity, completely achieving 100% acetone conversion at 120℃ under the reaction conditions of acetone concentration = 1000 ppm, 20 vol% O2/N2 and WHSV = 36000 ml·g-1·h-1. This excellent catalytic activity comes from its larger specific surface area and higher Mn4+/Mn3+ molar ratio. XRD and TEM results show that YMn2O5 and CeO2 phases form a multiphase oxide and interfacial structure. XPS results show that the content of doped CeO2 mainly affects the surface adsorbed oxygen (Oads) and Mn4+ content of the catalyst. Manganese species with higher chemical states are indeed more favorable for oxidation reactions on manganese-based catalysts. In addition, the reduction temperature of mixed oxides shifts to the lower temperature region, indicating that manganese and cerium oxides are more reducible, where the mobility of oxygen species is greatly enhanced. Y0.9Ce0.1Mn2O5 also exhibits strong long-term stability and has good resistance to acetone elimination, showing excellent potential in eliminating acetone.