A5027105361- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Electrochemical Analysis and Applications
- Catalysis and Hydrodesulfurization Studies
- Membrane-based Ion Separation Techniques
- Conducting polymers and applications
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Ammonia Synthesis and Nitrogen Reduction
- Nanomaterials for catalytic reactions
- Advanced Battery Technologies Research
- Advanced Memory and Neural Computing
- MXene and MAX Phase Materials
- Molecular Junctions and Nanostructures
- Catalysis and Oxidation Reactions
- Electrochemical sensors and biosensors
- Advanced MRI Techniques and Applications
- Carbon dioxide utilization in catalysis
- Metal-Organic Frameworks: Synthesis and Applications
- Graphene research and applications
Chongqing University
2016-2025
Shanghai University of Electric Power
2025
Shenzhen Institutes of Advanced Technology
2025
University of Chinese Academy of Sciences
2023-2025
Center for Interdisciplinary Studies
2024
South China University of Technology
2023
Energy Research Institute
2023
Seoul National University
2023
Institute for Basic Science
2023
United Imaging Healthcare (China)
2019-2023
Understanding the origin of high activity Fe–N–C electrocatalysts in oxygen reduction reaction (ORR) is critical but still challenging for developing efficient sustainable nonprecious metal catalysts fuel cells and metal–air batteries. Herein, we developed a new highly active ORR catalyst containing Fe–Nx coordination sites Fe/Fe3C nanocrystals (Fe@C-FeNC), revealed its by intensively investigating composition structure their correlations with electrochemical performance. The detailed...
Forced obedience: Layer-structured montmorillonite (MMT) was used as a nanoreactor for the generation of planar pyridinic and pyrrolic N sites in nitrogen-doped graphene (NG; see picture). The selectivity formation inversely proportional to interspace width (δ) MMT reached maximum 90.27 %. NG catalyst exhibited low electrical resistance, high electrocatalytic activity, good stability. development high-performance low-cost catalytic materials oxygen reduction reaction (ORR) has been major...
It is highly desirable but challenging to develop bifunctional catalysts for efficiently catalyzing both the oxygen reduction reaction (ORR) and evolution (OER) in energy storage conversion systems. Here a simple yet cost-effective strategy developed fabricate nitrogen phosphorus dual-doped graphene/carbon nanosheets (N,P-GCNS) with N,P-doped carbon sandwiching few-layers-thick graphene. The as-prepared N,P-GCNS shows outstanding catalytic activity toward ORR OER potential gap of 0.71 V...
Atomically dispersed Zn-N-C nanomaterials are promising platinum-free catalysts for the oxygen reduction reaction (ORR). However, fabrication of with a high Zn loading remains formidable challenge owing to volatility precursor during high-temperature annealing. Herein, we report that an atomically catalyst ultrahigh 9.33 wt % could be successfully prepared by simply adopting very low annealing rate 1° min-1 . The exhibited comparable ORR activity Fe-N-C catalysts, and significantly better...
We have designed and synthesized a polyaniline (PANI)-decorated Pt/C@PANI core-shell catalyst that shows enhanced activity durability compared with nondecorated Pt/C. The experimental results demonstrate the for oxygen reduction reaction strongly depends on thickness of PANI shell greatest enhancement in catalytic properties occurs at 5 nm, followed by 2.5, 0, 14 nm. also demonstrates significantly improved stability unmodified Pt/C catalyst. high is ascribed to its novel PANI-decorated...
Metal-free phosphorus-doped graphene nanosheets (P-TRG) with large surface area (496.67 m2 g−1) and relatively high P-doping level (1.16 at.%) were successfully prepared by thermal annealing a homogenous mixture of oxide 1-butyl-3-methlyimidazolium hexafluorophosphate under argon atmosphere. It was found that the P atoms substitutionally incorporated into carbon framework partially oxidized, which created new active sites for oxygen reduction reaction (ORR). Accordingly, ORR catalytic...
Herein, we report a "shape fixing via salt recrystallization" method to efficiently synthesize nitrogen-doped carbon material with large number of active sites exposed the three-phase zones, for use as an ORR catalyst. Self-assembled polyaniline 3D network structure was fixed and fully sealed inside NaCl recrystallization solution. During pyrolysis, crystal functions nanoreactor, which facilitates nitrogen incorporation graphitization. The gasification in such closed nanoreactor creates...
Recent advances in the electrical conductivity, intrinsic activity and morphology design of transition-metal-oxide-based oxygen reduction catalysts are summarized.
Abstract Proton exchange membrane fuel cells convert hydrogen and oxygen into electricity without emissions. The high cost low durability of Pt-based electrocatalysts for the reduction reaction hinder their wide application, development non-precious metal is limited by performance. Here we design a hybrid electrocatalyst that consists atomically dispersed Pt Fe single atoms Pt–Fe alloy nanoparticles. Its mass activity 3.7 times higher than commercial Pt/C in cell. More importantly, cell with...
Oxygen vacancies (OVs) are important for changing the geometric and electronic structures as well chemical properties of MnO2. In this study, we performed a DFT+U calculation on structure catalytic performance β-MnO2 catalyst oxygen reduction reaction (ORR) with different numbers extents OVs. Comparing those results experimental XRD analysis, determined that OVs produce new crystalline phase β-MnO2. Changes in (Bader charges, band structure, partial density states, local frontier molecular...
The surface modified Ti<sub>3</sub>AlC<sub>2</sub>supported Pt (Pt/e-TAC) catalyst shows improved activity and enhanced stability toward the oxygen reduction reaction when compared with commercial Pt/C catalyst.
The development of highly stable and efficient catalysts for sluggish cathode oxygen reduction reaction (ORR) is extremely important the long-term operation commercialization proton exchange membrane fuel cells (PEMFCs) but still challenging. We present herein a facile strategy to efficiently embed Pt nanocrystals into N-doped porous carbon/carbon nanotubes (Pt@CNx/CNT). carbon shells not only effectively prevented from detachment, dissolution, migration, aggregation during accelerated...
Schichtförmiger Montmorillonit (MMT) wurde als Nanoreaktor für die Erzeugung von planaren pyridinischen und pyrrolischen N-Zentren in N-dotiertem Graphen (NG) verwendet (siehe Bild). Die Selektivität Bildung der war umgekehrt proportional zum Schichtabstand (δ) des MMT erreicht ein Maximum 90.27 %. Der NG-Katalysator zeichnet sich durch einen niedrigen elektrischen Widerstand, hohe elektrokatalytische Aktivität gute Stabilität aus. As a service to our authors and readers, this journal...
The Ni(OH)<sub>2</sub> hexagonal platelets were <italic>in situ</italic> fabricated on Ni foam as a binder-free supercapacitor electrode material with high performance and excellent cycling stability by one-step, cost-effective, green hydrothermal treatment of three-dimensional (3D) in 15 wt% H<sub>2</sub>O<sub>2</sub> aqueous solution.
The poor durability of Pt-based nanoparticles dispersed on carbon black is the challenge for application long-life polymer electrolyte fuel cells. Recent work suggests that Fe- and N-codoped (Fe-N-C) might be a better support than conventional high-surface-area carbon. In this work, we find electrochemical surface area retention Pt/Fe-N-C much commercial Pt/C during potential cycling in both acidic basic media. situ inductively coupled plasma mass spectrometry studies indicate Pt dissolution...
Abstract Ruthenium dioxide is presently the most active catalyst for oxygen evolution reaction (OER) in acidic media but suffers from severe Ru dissolution resulting high covalency of Ru-O bonds triggering lattice oxidation. Here, we report an interstitial silicon-doping strategy to stabilize highly sites RuO 2 while suppressing The representative Si-RuO −0.1 exhibits activity and stability acid with a negligible degradation rate ~52 μV h −1 800 test overpotential 226 mV at 10 mA cm −2 ....
Even though various nickel–nitrogen–carbon (Ni-N-C) combinations are prospective low-cost catalysts for the CO2 electroreduction reaction (CO2RR), which is one avenue attaining carbon neutrality, detailed role of different N species has hardly been investigated. Here, we report a hollow porous N-doped nanofiber with NiNX-pyridinic active (denoted as h-Ni-N-C) developed using facile electrospinning and SiO2 space-confined pyrolysis strategy. The facilely generated during process, giving rise...