A5070407221- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- Ammonia Synthesis and Nitrogen Reduction
- Inorganic Chemistry and Materials
- Advanced Photocatalysis Techniques
- Catalytic Processes in Materials Science
- Electrochemical Analysis and Applications
- Chemical Synthesis and Characterization
- Corrosion Behavior and Inhibition
- Advancements in Solid Oxide Fuel Cells
- Thallium and Germanium Studies
- Electrodeposition and Electroless Coatings
- Advanced Memory and Neural Computing
- Catalysis for Biomass Conversion
- Anodic Oxide Films and Nanostructures
- Machine Learning in Materials Science
- Hybrid Renewable Energy Systems
- Caching and Content Delivery
- MXene and MAX Phase Materials
- Magnesium Alloys: Properties and Applications
- Advanced Battery Materials and Technologies
- Nanomaterials for catalytic reactions
China Automotive Technology and Research Center
2023-2024
Tianjin Special Equipment Supervision and Inspection Technology Research Institute
2023-2024
Tianjin University
2018-2023
Hunan University
2021-2023
Abstract Proton exchange membranes with short-pathway through-plane orientated proton conductivity are highly desirable for use in membrane fuel cells. Magnetic field is utilized to create oriented structure membranes. Previously, this has only been carried out by nonconductive metal oxide-based fillers. Here, under a strong magnetic field, proton-conducting paramagnetic complex based on ferrocyanide-coordinated polymer and phosphotungstic acid used prepare composite conductive...
A Co-based zeolitic imidazolate framework (ZIF-67) derived catalyst with ultrafine CoPt nanoalloy particles is designed via a two-step space confinement method, to achieve robust oxygen reduction reaction (ORR) performance for proton exchange membrane fuel cell (PEMFC). The core-shell structure of ZIF-67 (core) and SiO2 (shell) carefully adjusted inhibit the agglomeration Co nanoparticles. In subsequent adsorption-annealing process, in situ formed graphene shell on surface nanoparticles...
The degradation of the membrane electrode assembly, originating from microstructural changes in catalyst layer, inhibits commercialization polymer electrolyte fuel cell. In particular, relative humidity during starting/working conditions cause crack growth and propagation within but reason is still not clear. Here, accelerated stress tests are designed starting (25 °C, 45% RH) to working with different RHs (20%, 99%) at 85 °C for cycles. For low RH 20%, no obvious change can be observed,...
To reduce the corrosion of Q235 steel, environment-friendly and efficient N-doped carbon dots (N-CDs) were synthesized using 4-amino salicylic acid (4-ASA) l-histidine (l-His) as precursors. The inhibition behavior N-CDs for steel in 1 M HCl solution was systematically investigated a weight-loss experiment, an electrochemical test, morphology. Results showed that could effectively inhibit inhibitory efficiency reached 93% at 50 mg L–1. Quantum chemistry molecular dynamics used to study...
The huge advantage of fabrication cost for non-Pt catalyst attracts increasing efforts during fuel cell development. As a potential candidate, Fe single atom (SA) catalysts exhibit remarkable catalytic activity for...
Abstract As a new class of metal–nitrogen–carbon (M−N−C) material with 3 D microstructure, zeolitic imidazolate frameworks (ZIFs) are used to synthesize highly active electrocatalysts for the oxygen reduction reaction, as substitutes commercial Pt/C in anion exchange membrane fuel cells. However, form an effective catalyst layer (CL), relationship between microstructure ZIF‐derived and cell performance must be investigated. In this work, hierarchically porous CL based on carbon black...
Developing highly efficient non-noble metal catalysts for the cathode of fuel cells is an urgent requirement reducing cost. Although intrinsic activity materials has been greatly improved, cell performance also determined by mass transfer within catalyst layer (CL), particularly at high current density. Electrochemical impedance spectroscopy (EIS) combined with rotating disk electrode (RDE) analysis a powerful tool to quantitatively analyze influence structural properties on CL performance....
Abstract To meet the ever‐increasing demand of proton exchange membrane fuel cell (PEMFC), it is necessary to carry out structure optimization for low‐cost and high‐stability oxygen reduction reaction (ORR) catalysts. Herein, a zeolitic imidazolate framework (ZIF)‐derived carbon material with mass heteroatoms defects developed serves as advanced support nano‐Pt‐based ORR This unique enhances interaction between nano‐Pt support, leading higher intrinsic activity. During applications,...
Abstract Due to the sluggish kinetics of oxygen reduction reaction (ORR) by non‐Pt based catalyst, high loading catalyst is required achieve satisfactory fuel cell performance, which inevitably leads increase layer thickness with serious mass transport resistance. Herein, a defective zeolitic imidazolate framework (ZIF) derived Co/Fe‐N‐C small mesopores (2–4 nm) and density CoFe atomic active sites are prepared regulating Fe dosage pyrolysis temperature. Molecular dynamics simulation...
Water management in the anode catalyst layer (ACL) during fuel cell operation is of importance to performance anion exchange membrane cells (AEMFCs). Until now, only a few methods, such as controlling external conditions and adjusting other components like gas diffusion (GDL), attempt indirectly regulate water content within ACL. Here, we report self-regulating ACL having stratified, gradient pore sizes from 8 nm (membrane side) 150 (GDL side). Self-regulating moisture behavior was observed...
The cathode catalyst layer, constructed with carbon nanotube-supported nano-Pt, exhibits high fuel cell performance due to enhanced mass transfer efficiency and Pt utilization.
Abstract To maximize the activity and durability of transition metal sulfides for water oxidation is still a great challenge. Herein, we developed new cobalt phosphosulfide nanosheet on carbon fiber paper (CFP) substrate electrocatalyst (Co 2− x SP/CFP) following simple two‐step electrodeposition method. The sulfide nanosheets were first deposited onto CFP by cyclic voltammetry. Then, surface structure P/S ratio as well Co 3+ /Co 2+ tuned regulating cycling numbers phosphorous...
As a core component, the catalyst layer (CL) is widely used in fuel cell, metal-air battery, and other energy conversion devices. Herein, highly efficient method for CL preparation via fast current-driven synthesis followed by pyrolysis proposed. Compared with previously reported fabrication procedures of zeolite imidazolate frameworks (ZIF)-based CLs, this directly deposits ZIF precursor onto conductive substrate very short time (≤15 min). The self-supporting CL, converted from membrane...
Abstract Ordered (110)‐oriented Co 1‐x S nanosheet arrays on carbon fiber paper (CFP) are prepared by a one‐step electrodeposition. The S/CFP electrode not only enhances the oxygen evolution reaction performance, η =0.328 V (10 mA cm −2 ) and Tafel slope at about 48.5 mV dec −1 , but also has excellent durability. Due to its high activity facile preparation, binder‐free shows great potential in replacing noble metal catalysts for water splitting.