Oxidation State Of Pt Research Articles

Reevaluation of XPS Pt 4f peak fitting: Ti 3s plasmon peak interference and Pt metallic peak asymmetry in Pt@TiO2 system

The structural, electronic, and electrochemical properties of noble metals supported on transition metal oxides, such as Pt nanoparticles (NPs) supported on TiO2 (Pt@TiO2), have been extensively studied for their relevance to energy technologies, including photocatalysis, electrocatalysis, and electrochemical energy conversion. As the need to lower the amount of Pt and other noble metals used in energy conversion systems becomes urgent, it is essential to accurately quantify the loading of these metals and electronic density redistribution between them and their supports. X-ray photoelectron spectroscopy (XPS) is widely used for the identification and quantification of chemical species. In particular, fitting of the Pt 4f spectra for Pt@TiO2 is frequently performed to determine the chemical environment and oxidation state of Pt, which strongly affect the physical behavior and catalytic performance of this system. Here, we show that neglecting contributions due to the Pt surroundings and the asymmetry of the Pt metal peak in the line shape fitting can lead to severe mischaracterization of the oxidation state of Pt. We quantify the effects of background contributions that stem from the TiO2 support and discuss how factoring in the strong asymmetry of Pt 4f doublets, which stems from the shake-up type processes, affects the interpretation of Pt 4f XPS line shape.

(Invited) Nanomembrane Coating for Advanced Electrocatalysis

Advanced electrocatalysis that possesses higher selectivity and durability is more and more important for the electrification of chemical processes, which is expected in the renewable energy society in the future. Electrochemical reactions are often determined by the competition between the thermodynamic redox potential and the applied potential. Because the redox potential is characteristic for determining the product, it is often difficult to adjust the selectivity just by surface chemistry. Against this background, surface modification of electrodes is a well-studied field. Surface modification improves membrane functionality and selectivity, resulting in electrocatalysts with higher productivity and selectivity. Surface protective layers are also associated with material durability, as they prevent toxic and harmful substances from approaching the surface and prevent dissolution of the electrode material into the electrolyte. We are investigating the use of "nanomembrane" coatings on electrodes to achieve better selectivity and durability.Electrochemical reduction deposition of ultrathin layers of Cr and Mo on Pt cathodes has been shown to yield O2-tolerant hydrogen-evolving electrodes in the appropriate pH range. Electrochemical measurements indicate that these surface layers act as a membrane film. Many bulky ions and O2 molecules cannot pass through these surface layers, but H2 molecules can, consistent with electrochemical and spectroscopic measurements. First, the electrochemical properties of Pt modified with other elements such as Cr and Mo were investigated and monitored for catalytic activity under different atmospheres. Next, in-operando X-ray absorption spectroscopy (XAS) was used to investigate the working state of the material: electrochemical measurements in H2 and O2 confirmed that the oxygen reduction reaction (ORR) was severely suppressed and the hydrogen evolution reaction (HER) was maintained. XAS results also showed that the oxidation state of Pt can be freely changed by a potential sweep with or without a coating layer. We extended this work to nanofilm coating on oxygen-evolving anodes for water splitting, and succeeded in anodic deposition of a thin Ce layer on Ni-Fe electrodes; the Ce layer not only prevents unwanted ions from reaching the electrode surfaces, but also prevents Fe ions from leaching from the electrodes, thus improving the durability of the electrodes. In this presentation, key findings of these nanomembrane coatings and future prospects for selective and durable electrodes will be discussed.

Novel solution plasma synthesis of highly durable carbon shell encapsulated platinum-based cathode catalyst for polymer electrolyte membrane fuel cells

Developing an effective method for synthesizing high-performance and durable catalysts for the oxygen reduction reaction is of great importance for cost reduction and the wide application of fuel cells. This study presents a simple and effective strategy using a plasma reaction in the liquid phase to synthesize carbon-shell-encapsulated Pt and PtFe catalysts. A carbon-shell-encapsulated PtFe catalyst alloyed with up to 29 at.% Fe exhibits a mass activity of 730 mA·mgpt−1 and a specific activity of 1772 μA cm−1, which are 2.4 and 5 times higher than that of commercial Pt/C, respectively. The carbon shell effectively maintained the low oxidation state of Pt by suppressing the formation of Pt–OH and significantly improved the durability of the catalyst in accelerated durability tests, increasing the gap in mass activity with Pt/C by a factor of up to six after 50,000 cycles. In addition, the decrease in the electrochemical surface area by the carbon shell enabled a more stable 4-electron reaction over a wide potential range. This study may provide fascinating insights into the effect of the carbon shell contributing to the improvement of the catalytic activity and durability of fuel cells as well as the novel plasma-based synthesis strategy of core-shell catalyst.

Stabilizing Single-Atomic Pt by Forming PtFe Bonds for Efficient Diboration of Alkynes.

Precisely tailoring the oxidation state of single-atomic metal in heterogeneous catalysis is an efficient way to stabilize the single-atomic site and promote their activity, but realizing this approach remains a grand challenge to date. Herein, a class of stable single-atomic catalysts with well-tuned oxidation state of Pt by forming PtFe atomic bondsisreported, which are supported by defective Fe2 O3 nanosheets on reduced graphene oxide (PFARFNs). These as-synthesized materials can greatly enhance the catalytic activity, stability, and selectivity for the diboration of alkynes. The PFARFNs exhibit high conversion of 99% at 100°C with an outstanding turnover frequency (TOF) of 545h-1 , and a relatively high conversion of 58% at room temperature (25°C) with a TOF of 310h-1 , which has beenhardly achieved previously. Through both experimental and theoretical investigation, it is demonstrated that the fast electron transfer from Fe to Pt in Fe-Pt-O atomic sites in PFARFNs can not only stabilize the single-atomic Pt, but also significantly improve their catalytic activity.

Soot oxidation over Pt-loaded CeO2-ZrO2 catalysts under gasoline exhaust conditions: Soot-catalyst contact efficiency and Pt chemical state

Decreasing the ignition temperature of soot combustion is a key of the improved catalyst performances, but a much lower concentration of oxygen from gasoline vehicle exhaust makes the research of the catalyst extremely challenging. Improving the adsorption and activation of oxygen molecules on the catalyst surface and the effective migration rate of active oxygen species are the key factors to enhance soot oxidation. In this work, Pt/CeO2-ZrO2-re catalyst was synthesized by synergistically adjusting CeO2-ZrO2 pore structure and Pt chemical state, as a result, the conversion temperature (T50, 50% soot was oxidized) was reduced by 113 ℃ in 1% O2/N2. The pore structure of CeO2-ZrO2 was optimized by copolymerization microsphere template assisted method, and better soot-contact efficiency and intrinsic properties were obtained, resulting in a higher availability of reactive oxygen species. In addition, adjusting Pt chemical state by using the liquid phase reduction method is significant for the adsorption and activation of oxygen molecules and catalytic cycle of soot oxidation. Structure-activity relationship studies showed that soot oxidation performance is highly related to the initial oxidation state of Pt and pore structure in 1% O2/N2. Better soot-contact efficiency, improved intrinsic properties and the existence of metallic Pt are responsible for the higher soot oxidation activity of Pt/CeO2-ZrO2-re catalyst.

Co2+, Fe2+, and Ni2+: Modifiers for Photocatalytic Deposition of Highly Active Pt on Graphene-Based Supports

This study focuses on photocatalytic syntheses, in which transition metal ions (Co2+, Fe2+, or Ni2+), as the hole scavengers and surface modifiers of partially reduced graphene oxide, PRGO, were utilized to photoreduce Pt4+. A pulsed UV reactor was used to illuminate the precursors. The electrostatic interaction between the metal ions (Co2+, Fe2+, or Ni2+) and the oxygen functional groups on PRGO was the main parameter, proposed to be the reason controlling Pt4+ reduction and Pt structure and activity. The alternative assumption in managing the oxidation states of Pt was the variation in the oxidation rates of hole scavengers. Pt electrocatalysts’ structural and electrochemical characteristics revealed that utilizing the cobalt-based hole scavenger caused a dominant growth phase of Pt particles at preferred positions on PRGO, with metallic states and improved electrocatalytic activities (ECSA value of 191 m2·g–1 for Co2+ vs 141 m2·g–1 and 127 m2·g–1 for Fe2+ and Ni2+, respectively). Density functional theory (DFT) calculation, on the other hand, suggested that the greater affinity of cobalt and iron ions to oxygen groups could detach more “O” from the graphene plane. Based on the DFT results, less “O” groups in the vicinity of Pt particles gave an amorphous morphology to Pt and facilitated the hydrogen oxidation reaction (HOR).

Impact of platinum loading and dispersion on the catalytic activity of Pt/SnO2 and Pt/α-Fe2O3

The Pt/SnO2 (SP-samples) and Pt/α-Fe2O3 (FP-samples) with platinum loadings between 1 and 10 mol% were synthesized mechanochemically starting from platinum(II) acetylacetonate dissolved in toluene and from SnO2 and α-Fe2O3 powders obtained from tin(II) and iron(II) acetates. The STEM results show that the ultrasmall platinum nanoparticles (PtNPs) are well dispersed on the SnO2 and α-Fe2O3 supports. The PtNPs size distributions calculated with lognormal functions ranged from 1.0 to 1.3 nm. The results of temperature programmed reduction in hydrogen showed maxima at 120–160 °C due to the reduction of PtOx to Pt0. The Pt-4f-XPS results showed that the dispersed platinum on the SnO2 and α-Fe2O3 supports consisted of all three oxidation states of platinum: Pt4+, Pt2+ and Pt0. The average oxidation state of platinum as a function of molar fraction of Pt loading in the SP samples varies from 1.69 to 2.11, whereas the oxidation state of Pt in the FP samples varies more linearly and steeply from 1.42 to 2.58. The synthesized samples showed high catalytic activity for the reduction of 4-nitropenol (4-NP) to 4-aminophenol (4-AP), which can be explained by the high dispersion of non-aggregated ultrasmall PtNPs with a size of about 1 nm on the SnOx and FeOx supports.

Structural Model for Transient Pt Oxidation during Fuel Cell Start-up Using Electrochemical X-ray Photoelectron Spectroscopy.

Potential spikes during the start-up and shutdown of fuel cells are a major cause of platinum electrocatalyst degradation, which limits the lifetime of the device. The electrochemical oxidation of platinum (Pt) that occurs on the cathode during the potential spikes plays a key role in this degradation process. However, the composition of the oxide species formed as well as their role in catalyst dissolution remains unclear. In this study, we employ a special arrangement of XPS (X-ray photoelectron spectroscopy), in which the platinum electrocatalyst is covered by a graphene spectroscopy window, making the in situ examination of the oxidation/reduction reaction under wet conditions possible. We use this assembly to investigate the change in the oxidation states of Pt within the potential window relevant to fuel cell operation. We show that above 1.1 VRHE (potential vs reversible hydrogen electrode), a mixed Ptδ+/Pt2+/Pt4+ surface oxide is formed, with an average oxidation state that gradually increases as the potential is increased. By comparing a model based on the XPS data to the oxidation charge measured during potential spikes, we show that our description of Pt oxidation is also valid during the transient conditions of fuel cell start-up and shutdown. This is due to the rapid Pt oxidation kinetics during the pulses. As a result of the irreversibility of Pt oxidation, some remnants of oxidized Pt remain at typical fuel cell operating potentials after a pulse.

Intrinsic size‐dependent activity of Pt nanoparticles without masking by heterogeneous oxidation states of Pt for hydrolytic dehydrogenation of NH 3 BH 3

We report size-dependent activity of Pt nanoparticles for hydrolytic dehydrogenation of ammonia borane (AB, NH3BH3) in the size range of 1 to 4 nm without masking by heterogeneous oxidation states of Pt. Specifically, we synthesized five differently sized Pt nanoparticles encapsulated inside generation 6 poly(amidoamine) dendrimers with a uniform oxidation state of Pt in an effort to study the intrinsic size effect of Pt nanoparticles on their catalysis. The five differently sized Pt nanoparticles exhibited significant catalytic activity for hydrolytic dehydrogenation of AB under mild conditions. Interestingly, we found that the catalytic activity of the Pt nanoparticles encapsulated inside dendrimers was tunable even with the subnanometer changes in the sizes of Pt nanoparticles in the range of small sizes less than 4 nm. In particular, the Pt nanoparticle with a mean size of 2.5 nm exhibited the highest catalytic activity with a turnover frequency value of 242.3 ± 7.1 mol H 2 molPt−1 min−1 for hydrogen generation from the hydrolysis of AB at 25°C. The size-dependent activity of Pt nanoparticles was attributed to be geometric in nature, primarily due to the square face Pt atoms as the dominant active sites for the hydrolytic dehydrogenation of AB. Novelty Statement We report size-dependent activity of Pt nanoparticles in the size range of 1 to 4 nm for hydrolytic dehydrogenation of NH3BH3. We synthesized five differently sized Pt nanoparticles, which were encapsulated inside dendrimers, with a uniform oxidation state of Pt in an effort to study the intrinsic size effect of Pt nanoparticles on their catalytic activity without masking by heterogeneous oxidation states of Pt catalysts. The five differently sized Pt nanoparticles exhibited significant catalytic activity for the dehydrogenation of NH3BH3 under mild conditions.

Strain-Assisted Single Pt Sites on High-Curvature MoS 2 Surface for Ultrasensitive H 2 S Sensing

Strain-Assisted Single Pt Sites on High-Curvature MoS ₂ Surface for Ultrasensitive H ₂ S Sensing

Tunable metal-support interaction of Pt/CeO2 catalyst via surfactant-assisted strategy: Insight into the total oxidation of CO and toluene

Catalytic oxidation is promising in removing atmospheric pollutants to address serious environmental concerns. Supported Pt-based catalysts (e.g., Pt/CeO2) are most effective for catalytic removal of atmospheric pollutants. However, the catalytic performance is largely affected by the oxidation state of Pt, oxygen vacancy and metal-support interaction (MSI). Herein, two different types of Pt/CeO2 catalyst were fabricated via surfactant-assisted strategy and treated in different annealing atmospheres, which was applied to carbon monoxide (CO) and toluene (C7H8) oxidation, respectively. The results reveal that the as-synthesized Pt/CeO2-NH catalyst is favorable to C7H8 oxidation, whereas the contrast Pt/CeO2-AH is favorable to CO oxidation. Meanwhile, Pt/CeO2-NH catalyst also has high thermal stability facing high temperature (e.g., 400 °C). Various characterizations, such as in-situ Raman, XPS, CO-DRIFTS and XANES, clarifies that the Pt/CeO2-NH catalyst has a higher surface Pt0 proportion, a weak MSI and more oxygen vacancies. The corresponding theoretical calculation also supports the experimental results. These results advance efficient regulation and fundamental understanding of MSI, and the design of heterogeneous catalysts.

Enhanced photocatalytic activity of BiVO4/Pt/PtOx photocatalyst: The role of Pt oxidation state

Monoclinic bismuth vanadate (BVO) has gained attention as a low-cost and promising visible light photocatalyst but suffers from fast charge carrier recombination. The present study reports the controlled photoreduction deposition of different Pt-based co-catalysts on the surface of BVO to address this drawback and brings a detailed discussion on the role of the oxidation state of Pt in determining the photoactivity of the photocatalysts. Results evidenced the presence of both metallic Pt and Pt oxides on the surface of BVO, with proportions that depended on the photoreduction time. The photocatalytic activity towards degradation of three model dyes revealed that platinum oxides (PtOx, x = 1 or 2) or a mixture of Pt0/PtOx species act out as better cocatalysts than Pt0, with an almost 4-fold higher apparent quantum yield for the optimized sample. The enhanced photoactivity of BVO/Pt/PtOx photocatalysts was attributed to their improved visible light absorption and enhanced charge carrier separation than pristine BVO or BVO/Pt. This study provides important insight into and a better understanding of the general photodeposition strategy employed to prepare semiconductor/metal (photo)catalysts on one hand and highlights the role of the oxidation state of deposited metal in determining the properties of composite (photo)catalysts on the other.

Thermal coupled photocatalysis over Pt/g-C3N4 for selectively reducing CO2 to CH4via cooperation of the electronic metal–support interaction effect and the oxidation state of Pt

Pt nanoparticle-loaded g-C3N4 (Pt/CN) that consisted of integrating Pt0 and Pt2+ species was prepared for selectively reducing CO2 to CH4 with H2O by thermal coupled photocatalysis. A strong electronic metal-support interaction was constructed between Pt nanoparticles and the g-C3N4 substrate, which limited the activity for CO evolution and improved the charge transfer from g-C3N4 to Pt for selective CH4 production. The formed Pt2+ species in the Pt nanoparticles completely suppress the side reaction of H2 production from reducing H2O. Moreover, a moderate heat input in the photocatalytic reaction facilitated the transfer of the photogenerated electrons from Pt nanoparticles to CO2, which further increased the photocatalytic activity for CH4 evolution. As a result, a significant enhancement of CO2 methanation performance (∼100 % selectivity, 14.8 μmol g−1 h−1) was realized on a 2 % Pt-loaded g-C3N4 photocatalyst under low intensity light-emitting diode (420 nm, on the order of solar intensity) irradiation at 125 °C.

The Dissolution Dilemma for Low Pt Loading Polymer Electrolyte Membrane Fuel Cell Catalysts

Cost and lifetime currently hinder widespread commercialization of polymer electrolyte membrane fuel cells (PEMFCs). Reduced electrode Pt loadings lower costs; however, the impact of metal loading (on the support) and its relation to degradation (lifetime) remain unclear. The limited research on these parameters stems from synthetic difficulties and lack of in situ analytics. This study addresses these challenges by synthesizing 2D and 3D Pt/C model catalyst systems via two precise routes and systematically varying the loading. Pt dissolution was monitored using on-line inductively coupled plasma mass spectrometry (on-line-ICP-MS), while X-ray spectroscopy techniques were applied to establish the oxidation states of Pt in correlation with metal loading. Dissolution trends emerge which can be explained by three particle proximity dependent mechanisms: (1) shifts in the Nernst dissolution potential, (2) redeposition, and (3) alteration of Pt oxidation states. These results identify engineering limitations, which should be considered by researchers in fuel cell development and related fields.

Role of surface coverage of alumina with Pt nanoparticles deposited by laser electrodispersion in catalytic CO oxidation

This work elucidates the role of surface coverage of alumina with Pt nanoparticles on the catalyst efficiency in CO oxidation. Size-selected Pt nanoparticles were deposited on the outer surface of alumina pellets by the laser electrodispersion technique. The alumina surface coverage with Pt varied from 0.04 to 3.5 nanoparticle layers and affected the Pt electronic state and catalyst efficiency. Even in the multilayer coatings nanoplatinum particles remained isolated. The catalysts were tested in CO oxidation at CO/O2 ratios of 0.2, 1 and 2 in the temperature-programmed and pulse reaction modes. At CO/O2 = 0.2 the temperature of 50% CO conversion increased with decreasing the surface coverage with Pt particles. At CO/O2 = 2 the decrease in the surface coverage enhanced the catalyst activity. Pt0 dominates only in multilayer catalysts, however, approximately half of platinum remained non-oxidized even at such a low metal loading as 0.01 wt%. The change in the electronic state of platinum under the thermal treatment in the reaction mixture affected the catalyst efficiency. The oxidation state of Pt depended on the metal loading, reaction temperature, CO/O2 ratio in the reaction mixture, mode of its feeding and surface coverage with Pt nanoparticles that influenced the interparticle and particle – support interactions.

Deposition of Pt/IrO2 Composite Films By Electroplating and Electrophoresis for Bio-Sensing Applications

We demonstrate a facile approach to deposit Pt/IrO2 composite films via a bipolar pulsing deposition technique in which the Pt ions are electrochemically reduced and the IrO2 colloids are electrophoretically deposited. The composite Pt/IrO2 films are subjected to both potential pulse and differential pulse voltammetry to detect the presence of dopamine (DA) and ascorbic acid (AA) for bio-sensing applications. In human’s body, a critical concentration of DA is used as an indicator for onset of Parkinson's disease. Unfortunately, the existence of AA would interfere with the detection of DA due to their similar oxidation potential. By fabricating a composite of Pt and IrO2, a lower detection limit with a minimized interference of DA and AA could be achieved. Electrochemical parameters relevant to the preparation of Pt/IrO2 films are optimized and the resulting morphology and composition are analyzed by SEM and EDS. The oxidation state of Pt and Ir are determined by XPS. The electrical resistance and electrochemical surface area of Pt/IrO2 films are recorded by impedance spectroscopy and electrochemical analysis.

N-Doped Graphene Oxide Decorated with PtCo Nanoparticles for Immobilization of Double-Stranded Deoxyribonucleic Acid and Investigation of Clenbuterol-Induced DNA Damage.

We demonstrate here a facile hydrothermal-assisted formation of PtCo alloy nanoparticles (NPs) and their simultaneous anchoring on the graphitic surface of N-doped graphene oxide (NGO). Doping induced nanopores in the carbon surface to facilitate the uniform and homogeneous anchoring of alloy nanoparticles. It was revealed that the formation of PtCo NPs on an NGO interface plodded excellent tendency toward double-stranded deoxyribonucleic acid (dsDNA). The dsDNA immobilization was enabled by the presence of several oxidation states of Pt and Co. The same property was further used to monitor the direct detection of dsDNA damage induced by clenbuterol via screen-printed carbon electrodes. Cyclic voltammetric and electrochemical impedance spectroscopic characterization traced well the dsDNA attachment on the modified electrode surface. Differential pulsed voltammetry was further used as a tool to monitor the characteristic guanine peak before and after incubating with clenbuterol used as a damage probe for the dsDNA. The findings can further be appurtenant in exploring dsDNA immobilization protocols and developing analytical methods for determination of various dsDNA damaging agents.

Spontaneous oxidation of arsenite on platinized TiO2 through activating molecular oxygen under ambient aqueous condition

The pre-oxidation of As(III) is essential for effective removal of arsenic in contaminated water. Although diverse arsenic oxidation methods have been developed, most require the input of chemical oxidants and external energy (e.g., electricity, photon energy). This study investigated the spontaneous catalytic oxidation of As(III) over Pt nanoparticles loaded on TiO2 under ambient aqueous conditions (i.e., air-saturated and room temperature). The proposed catalytic process requires dissolved O2 only as an oxidant, instead of chemical oxidants and energy input, where electrons spontaneously transfer from As(III) to O2 on the Pt–TiO2 catalyst. The oxidation rate of As(III) was highly dependent on (i) the content of Pt, (ii) the oxidation state of Pt, (iii) the presence of an electron acceptor (e.g., O2 and Fe(III)), (iv) the Pt support (e.g., TiO2, Al2O3, SiO2, etc.), and (v) the hetero-junction between Pt and TiO2. In this catalytic system, zero-valent Pt was confirmed as an active species for As(III) oxidation, and TiO2 acted as not only a support for the dispersion of Pt nanoparticles but also as an activator of in situ-generated H2O2 that is utilized in As(III) oxidation. Although Pt is expensive, the operation of Pt–TiO2 at room temperature without needing additional energy and chemical inputs, along with its high durability, can compensate for the high material cost. Therefore, the method presented here represents a viable treatment option for the pre-treatment of As(III)-contaminated water.

Impact of the Support on the Catalytic Performance, Inhibition Effects and SO2 Poisoning Resistance of Pt-Based Formaldehyde Oxidation Catalysts

Formaldehyde emissions in addition to the methane-slip have recently been addressed for natural gas fueled combustion engines and thus require an aftertreatment catalyst system. In this work, two Pt-based catalysts supported on Al2O3 and TiO2–SiO2 were investigated by considering their activity, inhibition and stability towards SO2-poisoning. The catalysts were analyzed by X-ray diffraction, electron microscopy, BET surface area, ex situ and operando X-ray absorption spectroscopy, which revealed differences in the oxidation state of Pt depending on the support material and that slightly reduced Pt sites seem to be the active species for this reaction. Systematic activity tests showed that NOx presence leads to a significant inhibition, possibly due to oxidation of the active species, whereas CO addition promotes formaldehyde oxidation above the onset temperature of CO oxidation. These results were supported by spatially resolved concentration profiles along the channel of a catalyst coated monolith. Addition of small amounts of SO2 to the gas mixture resulted in a complete loss of the low-temperature activity, slightly more pronounced for the TiO2–SiO2 supported catalyst.

Pt/CNDs-TiO2 electrocatalyst for direct alcohol fuel cells

The Pt/CNDs-TiO2 electrocatalyst was successfully synthesized by the alcohol reduction method. Titania (TiO2) nanoparticles were synthesized by the microwave-assisted acid hydrolysis method. The surface morphology of the synthesized materials was studied by X-ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM) and X-ray diffractometry (XRD). XPS results revealed the composition of the materials and the oxidation states of Pt in the synthesized electrocatalysts. TEM images proved that the materials were of the nanoscale. XRD patterns proved that titania nanoparticles synthesized by the microwave assisted hydrolysis exhibited an anatase form and Pt with (111), (200), (220) and (311) orientations was present in the synthesized electrocatalysts. The electrochemical oxidation of alcohols (methanol and ethanol) was studied in acidic media using linear sweep voltammetry and chronoamperometry. Durability tests were obtained from cyclic voltammetry test by exposing each electrocatalyst to fifty cycles. A commercial 10% Pt/C and the synthesized Pt/CNDs electrocatalysts were used as standards and were tested under the same conditions for comparison purposes. The observed voltammograms showed that incorporation of TiO2 into Pt/CNDs increases electrocatalytic activity and durability of the electrocatalysts. After fifty cycles current retention densities of 13.17 μA cm-2 and 88.03 μA cm-2 were obtained for methanol and ethanol respectively. Chronoamperometry results proved that the Pt/CNDs-TiO2 has a slower poisoning rate compared to the Pt/CNDs and Pt/C electrocatalysts.