Porous Carbon Layer Research Articles

Correction: Facile synthesis of interconnected layered porous carbon framework for high-performance supercapacitors

Correction: Facile synthesis of interconnected layered porous carbon framework for high-performance supercapacitors

Fabrication and electrochemical performance of Si@Polyaniline-based activated-carbon composites

Si@polyaniline-based activated-carbon (Si@P-AC) composites, consisting of porous polyaniline-based carbon layers, were synthesized via in-situ polymerization, high-temperature sintering, and steam activation utilizing silicon and aniline. Our experimental results demonstrate that Si@P-AC60 composites, prepared via steam activation at 700[Formula: see text]C for 60 min, exhibit superior rate and cycling performance. At current densities of 100, 200, 300, 500, and 1000 mA⋅g[Formula: see text], the discharge-specific capacities of Si@P-AC60 are 1617, 1133, 1005, 855, and 679 mAh⋅g[Formula: see text], respectively. Additionally, the specific capacity retention rate reaches 75.5% when the current density returns to 100 mA⋅g[Formula: see text], with the specific capacity recovering to 1221 mAh⋅g[Formula: see text]. This extraordinary electrochemical performance can be attributed to the improved electron and ion transport channels provided by the polyaniline-based activated-carbon (P-AC) coating on the surface of silicon particles.

Diatom Frustules Decorated with Co Nanoparticles for the Advanced Anode of Li-Ion Batteries.

Silica is regarded as a promising anode material for lithium-ion batteries (LIBs) because of its high theoretical capacity. However, large volume variation and poor electrical conductivity are limiting factors for the development of SiO2 anode materials. To solve this problem, combining SiO2 with a conductive phase and designing hollow porous structures are effective ways. In this work, The Co(II)-EDTA chelate on the surface of diatom biosilica (DBS) frustules and obtained DBS@C-Co composites decorated with Co nanoparticles by calcination without a reducing atmosphere is first precipitated. The unique three-dimensional structure of diatom frustules provides enough space for the volume change of silica during lithiation/delithiation. Co nanoparticles effectively improve the electrical conductivity and electrochemical activity of silica. Through the synergistic effect of the hollow porous structure, carbon layer and Co nanoparticles, the DBS@C-Co-60 composite delivers a high reversible capacity of >620mAhg-1 at 100mAg-1 after 270 cycles. This study provides a new method for the synthesis of metal/silica composites and an opportunity for the development of natural resources as advanced active materials for LIBs.

Ultrafine V2O5-anchored 3D N-doped carbon nanocomposite with augmented dual-enzyme mimetic activity for evaluating total antioxidant capacity

Total antioxidant capacity (TAC) can be evaluated by detecting the content of antioxidants, such as ascorbic acid, based on the enzyme-mimetic activity of nanomaterials. Herein, we fabricated a 3D-V2O5/NC nanocomposite using a self-templating strategy, which achieved ultrafine particles (∼2.5 nm), a porous carbon layer, large specific surface area (152.4 m2/g), N-doping and heterogeneous structure. The strong catalytic activity of 3D-V2O5/NC resulted from the integrated effect between the ultrafine structure of V2O5 nanoparticles and the 3D porous nitrogen-doped carbon framework, effectively increasing the number of active sites. This nanozyme presented a higher catalytic activity than its components or precursors in the nanocomposite (e.g., VN/NC, NC, V2O5, and VO2/g-C3N4). ROS scavenging experiments confirmed that the dual enzyme-like activity of 3D-V2O5/NC (catalase-like and oxidase-like) resulted from their co-participation of ‧O2−, h+ and ‧OH, among which ‧O2− played a crucial role in the catalytic color reaction. By virtue of the 3D-V2O5/NC nanoenzyme activity and TMB as a chromogenic substrate, the mixed system of 3D-V2O5/NC + TMB + H2O2 provided a low detection limit (0.03 μM) and suitable recovery (93.0–109.5%) for AA. Additionally, a smartphone-based colorimetric application was developed employing "Thing Identify" software to evaluate TAC in beverages. The colorimetric sensor and smartphone-detection platform provide a better or comparable analytical performance for TAC assessment in comparison to commercial ABTS test kits. The newly developed smartphone-based colorimetric platform presents several prominent advantageous, such as low cost, simple/rapid operation, and feasibility for outdoor use.

Preparation of N-Doped Layered Porous Carbon and Its Capacitive Deionization Performance

In this study, N-doped layered porous carbon prepared by the high-temperature solid-state method is used as electrode material. Nano calcium carbonate (CaCO3) (40 nm diameter) is used as the hard template, sucrose (C12H22O11) as the carbon source, and melamine (C3H6N6) as the nitrogen source. The materials prepared at 850 °C, 750 °C, and 650 °C are compared with YP-50F commercial super-activated carbon from Japan Kuraray Company. The electrode material at 850 °C pyrolysis temperature has a higher specific surface area and more pores suitable for ion adsorption. Due to these advantages, the salt adsorption capacity (SAC) of the N-doped layered porous carbon at 850 °C reached 12.56 mg/g at 1.2 V applied DC voltage, 500 mg/L initial solution concentration, and 15 mL/min inlet solution flow rate, which is better than the commercial super activated carbon as a comparison. In addition, it will be demonstrated that the N-doped layered porous carbon at 850 °C has a high salt adsorption capacity CDI performance than YP-50F by studying parameters with different applied voltages and flow rates as well as solution concentrations.

ZIF-67-derived porous nitrogen-doped carbon shell encapsulates photovoltaic silicon cutting waste as anode in high-performance lithium-ion batteries

The rapid development of the photovoltaic industry generates nearly 35 wt% micron-scale silicon powder waste in the form of a paste. This study reports the in-situ synthesis of ZIF-67 on the surface of low-cost silicon cutting waste. Submicron-scale porous cage-like silicon-based composites were obtained by carbonization. This hollow framework structure facilitated the large volume expansion/contraction of Si during charging/discharging. The porous nitrogen-doped carbon layer not only yielded rapid transport channels for Li+ and electrons but also improved the electrical conductivity of the material. In addition, the excellent pseudocapacitive performance of the Si@NC-ZIF composite also enhanced lithium storage. The composite exhibited excellent capacity retention of 1623.05 mAh/g after 100 cycles at 200 mA g−1, with the retention rate reaching 86.29 %. When the current was switched from 2000 to 100 mA g−1, the discharge capacity recovered to 1453.35 mAh/g, showing excellent rate performance. This study provides a new approach for the recycling and value-added utilization of photovoltaic silicon cutting waste in lithium-ion battery anodes.

Facile synthesis of interconnected layered porous carbon framework for high-performance supercapacitors

Facile synthesis of interconnected layered porous carbon framework for high-performance supercapacitors

Treatment of saline organic wastewater by heterogeneous catalytic ozonation with Al2O3-PEC-CaxOy as catalysts

Al2O3-Pectin-CaxOy (Al2O3-PEC-CaxOy) was prepared as catalysts to improve the treatment of saline organic wastewater with heterogeneous catalytic ozonation. Compared with ozonation alone (33%), the removal rate of COD (62%) was significantly increased for Al2O3-PEC-CaxOy catalysts prepared under the optimized conditions. The introduction of pectin made Ca2+ firmly loaded on the support, and avoided the loss of active sites in the process of catalytic oxidation. In addition, the formation of porous carbon layer on the surface of the Al2O3 support after pectin calcination was conducive to improving the catalytic activity of the catalyst. Electron paramagnetic resonance (EPR) and radical quenching experiments showed that hydroxyl radical (•OH), superoxide radical (•O2−) and singlet oxygen (1O2) were the reactive oxygen species (ROS) that attributed to the organic matter removal. Both free radical and non-free radical pathways were involved in the degradation of organic pollutants during the catalytic ozonation process. The removal rate of COD was only decreased slightly after twenty times of continuous operation for Al2O3-PEC-CaxOy catalysts, indicating that Al2O3-PEC-CaxOy catalysts with the good catalytic stability and reusability. It showed a great significance for long-term practical application with the economical and effective performances.

A Novel Hierarchical Structure of SnCu2Se4/d-Ti3C2Tx/NPC for a Lithium/Sodium Ion Battery and Hybrid Capacitor with Long-Term Cycling Stabilities

To alleviate kinetics imbalance and capacity insufficiency simultaneously, a novel hierarchical structure (SnCu2Se4/d-Ti3C2Tx/NPC) composed of delaminated Ti3C2Tx, SnCu2Se4 nanoparticles, and N-doped porous carbon layers is designed as a battery-type anode for lithium/sodium ion hybrid capacitor (LIC/SIC). The combination of SnCu2Se4 nanoparticles with high specific capacity, d-Ti3C2Tx with accelerated ion diffusion path, and NPC with enhanced electronic conductivity makes the SnCu2Se4/d-Ti3C2Tx/NPC composite possess excellent cycling stabilities in half-cell lithium-ion and sodium-ion batteries (LIB and SIB), with capacities of 114 mAh g-1 after 6000 cycles at 10 A g-1 for LIB and 296 mAh g-1 after 900 cycles at 1.0 A g-1 for SIB. The rate performance is also outstanding, with recovered capacity of 738 mAh g-1 at 0.1 A g-1 after cycles at current densities up to 50 A g-1 for LIB. Subsequently, LIC and SIC based on the SnCu2Se4/d-Ti3C2Tx/NPC anode and activated carbon cathode exhibit high energy densities of 147.9 and 158.6 Wh kg-1 at a power density of 100 W kg-1, respectively. They also possess distinctive long lifespans with capacity retentions of 78 and 81% after 10,000 cycles at 1.0 A g-1, respectively, demonstrating the feasibility of SnCu2Se4/d-Ti3C2Tx/NPC toward energy devices requiring high energy density, power density, and long-term stability.

Layered porous carbon material derived from food residues and its application for elemental mercury adsorption in flue gas

Abating mercury emissions from coal-fired industries is of preoccupation for protecting public environmental safety and human health. Affordable and high efficiency sorbents development for Hg0 adsorption in coal-fired industry is of practical significance for commercial applications. In this work, we report a layered porous carbon (LPC) material derived from food residues for Hg0 removal in coal-fired flue gas. The LPC is with significant high surface area of 2925 m2/g and mesoporous pore structures. Micro-mesoporous ranging from 0.4 nm to 5 nm are commonly found in the LPC, which can help promote mass diffusions thus enhancing Hg0 adsorption capability. Excellent Hg0 removal performance can be observed in simulated flue gas in 150℃ with the Hg0 removal efficiency reaching to 100 %, and it remains around 100 % within 5 successive adsorption and desorption processes without any loss. Both O2 and NO contribute significantly for the Hg0 oxidization and adsorption on LPC, and the presence of NO can greatly improve sulfur resistance for LPC. The LPC shows a rapid and efficient Hg0 adsorption capability once exposing in the Hg0 containing flue gas, and the maximum Hg0 adsorption capacity is estimated to be as high as 571 mg/g, which is much higher than other reported carbon base sorbents. The LPC derived from food residues has an industrial application potential for Hg0 removal in flue gas with the advantages of low cost and excellent adsorption performances.

Facile fabrication of N-self-doped porous carbons from green solid waste for supercapacitors with high cycling stability and flexibility

Carbon has become a commercial electrode material for supercapacitors. From the viewpoint of sustainable development, biochar is a superior electrode material for supercapacitors. Therefore, the synthesis of supercapacitor layered interconnected porous carbon materials with excellent electrochemical performance from biomass solid wastes has become a research hotspot. This paper reports the preparation of sunflower straw-based porous carbon (SSPC) materials with good pore size distribution, self-doped nitrogen and oxygen, and microporous/mesoporous structure using HCOOK as a new-type activator. In the three-electrode system, the capacitance of the optimal sample SSPC600-4 was maintained at 230 F g −1 under a high current density of 100 A g −1 . The symmetrical supercapacitor had the highest energy density of 25 Wh kg −1 (500 W kg −1 ) and excellent cycle stability (96.21% capacity after 20000 cycles). In addition, the all-solid-state symmetrical supercapacitors showed flexibility and successfully powered five 3 V bulbs when connected in series, thus confirming their potential applications in portable and wearable devices. Using waste sunflower straw as raw material, potassium formate (HCOOK) as a new non-toxic activator, nitrogen and oxygen self-doped layered porous carbon material was prepared by one-step activation carbonization method. The electrochemical measurements demonstrate that nitrogen and oxygen self-doped layered porous carbon material have excellent electrochemical performance for supercapacitor. • High-performance nitrogen and oxygen self-doped porous activated carbon are prepared with sunflower straw as precursor and potassium formate (HCOOK) as a new non-toxic activator. • Excellent electrochemical properties of nitrogen and oxygen self-doped porous activated carbon are achieved with optimum specific capacitance of 346 F g -1 at the current density of 1 A g -1 . • At 1 A g -1 , the high energy density of up to 25 Wh kg -1 is delivered at the power density 500 W kg -1 • The all-solid-state symmetrical supercapacitors device shows high flexibility and high energy density.

Controlled design of Na–P1 zeolite/ porous carbon composites from coal gasification fine slag for high-performance adsorbent

Low-cost and concentrated industrial wastes have been recognized as a sustainable resource for preparation of new functional materials. Here, a new method was designed for the synthesis of porous composites containing high-purity Na–P1 zeolite and porous carbon from waste coal gasification fine slag (CGFS), which was treated first by acid leaching to controllably remove metal impurities and adjust Si/Al ratio, followed by NaOH fusion and hydrothermal treatment. By leaching with 1.0 mol/L HCl solution, the Si/Al ratio of the raw CGFS increased to 5.7, and the obtained CZ-1.0 consisted of high-purity Na–P1 zeolite with a typical cone-shaped flower cluster shape. The residue carbon in CGFS can be further activated to form porous carbon and graphite carbon layers interposed in the zeolite structure. The specific surface area and pore volume of CZ-1.0 reached 153.91 m2/g and 0.18 cm3/g, respectively. CZ-1.0 exhibited remarkable adsorption performance for methylene blue (MB) with the adsorption capacity reaching 137.5 mg/g for 100 mg/L MB solution. The adsorption process is mainly controlled by the chemisorption mechanism, and the adsorption of MB by CZ-1.0 may include ion exchange, hydrogen bond interaction, π-π bond interaction and van der Waals force. NaCl solution was successfully used as the desorption agent to regenerate the composite material, and the removal rate remained above 92% after five cycles. This work provides an effective strategy to synthesize a practically applicable adsorbent from the waste coal gasification fine slag for the purification of MB wastewater.

Construction of porous Si/Ag@C anode for lithium-ion battery by recycling volatile deposition waste derived from refining silicon

Owing to the rapid advancement of the photovoltaic industry, a lot of photovoltaic (PV) silicon waste will be generated. Thus, the recycling and reuse of waste silicon have become particularly important, both for environmental remediation and economic benefits. In this work, a special structure of porous Si nanoparticles embedded nano-Ag and coated carbon layer (P-SiNPs/Ag@C) was produced by silver-assisted chemical etching (Ag-ACE) the deposited silicon waste. The special porous structure and carbon layer coating can effectively address the volume expansion issues during charge/discharge. The intercalated Ag nanoparticles greatly reduced the transfer impedance and enhanced the electrical conductivity of the anode material. As a result, the novel-designed P-SiNPs/Ag@C anode can maintain a prominent reversible capacity (1521 mAh·g−1 at 0.2 A g−1 after 50 cycles) and outstanding rate performance (1099 mAh·g−1 at 2 A g−1). When the current density at 1 A g−1, the specific capacity still maintains at 706 mAh·g−1 over 300 cycles. The superiority of the prepared P-SiNPs/Ag@C structures was further confirmed by Comsol Multiphysics software. Impressively, the synthesis route provides a novel avenue for value-added utilization of residual silicon waste resources from EB refining silicon and the preparation of high-performance lithium battery silicon-based anode.

Pt3Co/Co Composite Catalysts on Porous N-Doped Carbon Support Derived from ZIF-67 with Enhanced HER and ORR Activities.

The primary challenge for efficient H2 evolution and hydrogen energy conversion is to develop highly active and stable catalysts with simple and reliable preparation processes. In this regard, we have designed and synthesized a porous carbon-supported low-Pt alloy catalyst (Pt3Co/Co@C composite) using ZIF-67 as a template. It showed uniformly dispersed Pt3Co/Co on the porous carbon layer due to the confinement effect of the porous carbon layer. Pt3Co/Co@C demonstrated excellent activity for the hydrogen evolution reaction in the full pH range, with an overpotential of 187 mV in 0.5 M H2SO4 to attain 100 mA/cm2 as well as long-term stability. It also displayed superior mass activity for the oxygen reduction reaction (ORR) at 0.85 V (vs RHE) compared to the commercial Pt/C. Furthermore, the Pt3Co/Co@C catalyst exclusively enabled a four-electron reaction process under ORR conditions without the competitive pathway to H2O2. The current work provides guidance for the design and facile synthesis of Pt-based catalysts with enhanced performance.

Experimental validation of the mechanistic scale-up methodology of gas–solid spouted beds using radioactive particle tracking (RPT)

The very high-temperature reactors (VHTRs) are highly ranked among candidates of Generation IV of nuclear reactors due to their high efficiency, safety, the resistance to proliferation, and reliability. The VHTRs are preferentially fuelled by Tristructural-isometric (TRISO) coated fuel particles which has fuel kernels of fissile material coated by four coating layers: a porous buffer pyrolysis carbon layer (buffer PyC), an inner dense pyrolysis carbon layer (IPyC), a silicon carbide layer (SiC) and an outer dense pyrolysis carbon layer (OPyC). The heart of the operation and safety of the VHTRs significantly depends on the reliability of the coating layers of TRISO particles to retain metallic and gaseous fission products within the particles. The technique used for coating TRISO particles are gas-solids spouted beds via chemical vapor deposition (CVD). Fabrication of high-quality low-defect TRISO fuel particles fuel at larger scale spouted beds is required to support the commercialization of the VHTRs. In this work, our new developed mechanistic scale-up methodology of gas-solids spouted beds based on matching the radial profile of gas-holdup has been demonstrated and validated using radioactive particle tracking (RPT). Two spouted beds of small and larger scales were used in the study. Three sets of conditions were carried out which include the conditions of the reference case in the large scale, conditions that provide similar gas holdup radial profile to that of the reference case and conditions that provided dissimilar gas holdup radial in the small-scale spouted beds. The results confirm the validation of the scale-up methodology in terms of the dimensionless values of the spout diameter, cumulative probability distribution of the solids particles penetration into the spout, fraction of cycle time in each region of the bed, the radial profiles of the dimensionless values of the root-mean-square particle velocities and solids eddy diffusivity. The results further advance the knowledge and understanding of the gas-solids spouted beds provide deeper insight into their solids dynamics and presenting important benchmarking data for validating computational fluid dynamics codes and models. At last, procedures are established for the implementation of the new scale-up methodology.

Synergistically coupling of Ni3Mo3C/Mo2C/Ti3C2Tx MXene/N-doped carbon electrocatalyst towards enhanced hydrogen evolution activity

The development of highly active electrocatalysts is of great significance to improve hydrogen production technology and promoting the development of the hydrogen energy economy. Herein, we report an electrocatalyst consisting of bimetallic carbide nanoparticles encapsulating by an N-doped carbon (NC) layer deposited on the multilayer Ti3C2Tx (denoted as Ni3Mo3C/Mo2C/Ti3C2Tx/NC) for hydrogen evolution reaction (HER) using Ti3C2Tx MXene as a conductively catalytic carrier, polyoxometalates (POM) as a soft template, in which bimetallic carbides interact with hybrid carbon. Profiting from the bimetallic character and multi-aperture structure, the Ni3Mo3C/Mo2C/Ti3C2Tx/NC catalyst represents an overpotential of 99 mV in acidic medium and 98 mV in alkaline medium at 10 mA cm−2 with extended durability for 24 h. The turnover frequency (TOF) at 100 mV overpotential for Ni3Mo3C/Mo2C/Ti3C2Tx/NC electrocatalyst is 0.188 s−1. The remarkable catalytic activity for Ni3Mo3C/Mo2C/Ti3C2Tx/NC electrocatalyst can be attributed to the synergistic effects of bimetallic carbides. In addition, the introduction of Ti3C2Tx MXene further strengthened the conductivity of the catalyst as well as accelerated proton transport. Moreover, the protective effect of the porous carbon layer and the adulteration of the N atom increased the active site, resulting in improved HER properties. This simple preassembly-thermal conversion strategy offers a novel approach for the designing of superior electrocatalysts for HER.

Ultra-thin carbon coated amorphous N-doped CoP enhancing electron transfer for wide spectrum photocatalytic hydrogen evolution

It is necessary that develop broad spectrum responsive and noble-metal-free photo-catalysts to produce hydrogen. Herein, a novel nitrogen doped amorphous CoP with carbon coating (N–CoP@C) photo-catalyst was prepared by phosphating the Co-alanine complex precursor for wide spectrum photocatalytic H2 production. Nitrogen doping can adjust the electronic structure, promote photogenerated carrier separation, and enhance electronic density. The improvement of photocatalytic hydrogen evolution activity is due to the porous structure and surface carbon layer of amorphous N–CoP@C. The porous and thin slice structure can increase the specific surface area, thus providing more active sites and separating surface charges. The carbon layer can be used as an electron acceptor to suppress charge recombination and improve photocatalytic performance. The amorphous N–CoP@C-4 exhibits the highest hydrogen evolution rate of 60.91 μmol h−1 under visible light irradiation with EY as a photosensitizer and TEOA as an electron donor, which is about 46.7 and 2.8 times higher than Co-alanine and CoP, respectively. In particular, a high photocatalytic reaction stability was achieved over N–CoP@C-4 catalyst. This work provides an effective strategy for construction N–CoP@C to improve the photocatalytic activity.

Heterostructure based on exfoliated graphitic carbon nitride coated by porous carbon for photocatalytic H2 evolution

In this contribution, the heterostructure based on exfoliated graphitic carbon nitride (ex-gCN) coated by a porous carbon layer was fabricated by a simple approach and tested as a photocatalyst for hydrogen evolution under simulated solar light illumination. Bulk-gCN was firstly exfoliated and annealed under a hydrogen atmosphere in carefully selected conditions. The catalyst with the highest photoactivity was fabricated at 400 °C for 4 h. This material exhibited about a 23-fold higher amount of photogenerated hydrogen (18.2 μmol/g) compared to reference ex-gCN (0.8 μmol/g). Boosted photoactivity could be attributed to the (i) highly developed Specific Surface Area leading to more active sites on the surface due to the porous carbon layer, (ii) better transfer, and separation of photogenerated carriers, and (iii) sufficient suppression of the recombination process. Moreover, the mechanism of photocatalytic H2 evolution from water splitting based on a full physicochemical characterization of the studied materials was proposed.

Highly graphitized lignin-derived porous carbon with hierarchical N/O co-doping “core-shell” superstructure supported by metal-organic frameworks for advanced supercapacitor performance

Porous carbon nanoparticles have been widely utilized as electrode materials for electric double-layer capacitors (EDLCs) owing to their rich microporous and mesoporous structures. Herein, we successfully prepared lignin@ZIF-8 based carbon with hierarchical porous “core-shell” graphitized superstructure (KGC-EHL@ZIF-8) fabricated by carbonized ZIF-8 NPs as “core” and lignin derived graphitized porous carbon layer as “shell” via a two-stage carbonization-graphitization process for advanced supercapacitor performance. The prepared KGC-EHL@ZIF-8 NPs possess a high graphitization degree, high porosity with micro/meso porous hierarchical structure and high content of N/O co-dopants induced by the synergistic effects of ZIF-8 NPs coupling potassium hydroxide (KOH) activation treatment, thus guaranteeing excellent electrochemical performance. As a result, the graphitization degree of lignin-derived porous carbon “shell” structure increased with KOH ratio, and the maximum specific surface area of 2307.3 m2·g−1 was successfully obtained at a mass ratio (KOH/C-EHL@ZIF-8 NPs) of 1:1. The maximum specific capacitance within three-electrode system was 462.6 F·g−1 at 0.5 A·g−1 with a porous carbon “shell” thickness of around 75.25 nm. Moreover, the areal energy density of assembled supercapacitor can reach to 1.95 mWh·cm−2 at a power density of 27.44 mW·cm−2. This study put forward a novel strategy to efficiently harness lignin combined with a metal–organic framework for the construction of porous electrodes with hierarchical nanostructure for high-performance supercapacitors.

N-doped carbon layer-coated Au nanocatalyst for H2-free conversion of 5-hydroxymethylfurfural to 5-methylfurfural

Deoxygenative upgrading of 5-hydromethylfurfural (HMF) into valuable chemicals has attracted intensive research interest in recent years, with product selectivity control remaining an important topic. Herein, TiO2 supported gold catalysts coated with a thin N-doped porous carbon (NPC) layer were developed via a polydopamine-coating-carbonization strategy and utilized for pathway-specific conversion of HMF into 5-methylfurfural (5-MF) with the use of renewable formic acid (FA) as the deoxygenation reagent. The as-fabricated Au/TiO2@NPC exhibited excellent catalytic performance with a high yield of 5-MF (>95%). The catalytic behavior of [email protected] catalysts was shown to be correlated with the suitable combination of highly dispersed Au nanoparticles and favorable interfacial interactions in the [email protected] core-shell hetero-nanoarchitectures, thereby facilitating the preferential esterification of HMF with FA and suppressing unproductive FA dehydrogenation, which promoted the selective formylation/decarboxylation of hydroxy-methyl group in HMF in a pathway-specific manner. The present NPC/metal interfacial engineering strategy may provide a potential guide for the rational design of advanced catalysts for a wide variety of heterogeneous catalysis processes in terms of the conversion of biomass source.