A5081523003- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Ammonia Synthesis and Nitrogen Reduction
- Hydrogen Storage and Materials
- Hybrid Renewable Energy Systems
- Electrochemical Analysis and Applications
- Chemical Synthesis and Characterization
- Supercapacitor Materials and Fabrication
- Advanced Photocatalysis Techniques
- Advanced Memory and Neural Computing
- Advancements in Solid Oxide Fuel Cells
- Caching and Content Delivery
- Advanced Chemical Physics Studies
- Advancements in Battery Materials
- Quantum, superfluid, helium dynamics
- Graphene research and applications
- Catalysis and Hydrodesulfurization Studies
- CO2 Reduction Techniques and Catalysts
- Advanced Battery Materials and Technologies
Shanghai Jiao Tong University
2018-2024
University at Buffalo, State University of New York
2023-2024
Energy Foundation
2024
Nanjing University
2019
Electrochemical oxygen reduction could proceed via either 4e
High-loaded Pt1Co1-IMC@Pt/C catalyst enables high power PEMFCs, meeting the practical application requirement in electric vehicles.
Abstract Proton exchange membrane water electrolysis (PEMWE) is a key technology to solve the serious energy and environmental problems. However, poor durability of electrocatalysts in acidic oxygen evolution reaction (OER) environment hinders large‐scale application PEMWE. Herein, robust RuMn electrochemical catalyst with remarkable within 20 000 cyclic voltammetry cycles reported. Furthermore, stable for 720 h at 10 mA cm –2 current density 0.5 M H 2 SO 4 solution <100 mV overpotential...
Rationally combining designed supports and metal-based nanomaterials is effective to synergize their respective physicochemical electrochemical properties for developing highly active stable/durable electrocatalysts. Accordingly, in this work, sub-5 nm monodispersed nanodots (NDs) with the special nanostructure of an ultrafine Cu1Au1 core a 2-3-atomic-layer Cu1Pd3 shell are synthesized by facile solvothermal method, which further evenly firmly anchored onto 3D porous N-doped graphene...
Tuning the compositions and structures of Pd-based nanomaterials their supports has shown great potentials in facilitating sluggish ethanol oxidation reaction (EOR) alkaline direct fuel cells. Accordingly, a facile solvothermal method involving Cu Pd composition migrations is developed this study, to synthesize highly uniform small-sized nanospheres (NSs) possessing special composition-graded (CG) Cu1Pd1 surface-doped (SD) Ir0.03, which are evenly anchored onto N-doped porous graphene (NPG)...
Green synthesis of ammonia by electrochemical nitrogen reduction reaction (NRR) shows great potential as an alternative to the Haber-Bosch process but is hampered sluggish production rate and low Faradaic efficiency. Recently, lithium-mediated NRR has received renewed attention due its reproducibility. However, further improvement system restricted limited recognition mechanism. Herein, we demonstrate that began with deposition lithium, followed two chemical processes dinitrogen splitting...
In the past few years, great progress has been made in nonprecious metal catalysts, which hold potential as alternative materials to replace platinum proton exchange membrane fuel cells. One type of catalyst, Fe–N–C, displayed similar catalytic activity rotating disk electrode tests; however, rapid degradation Fe–N–C catalyst-based cells is always observed, limits its practical application. Although considerable research devoted study catalyst itself, rather less attention paid assembly that...
In the anodic catalyst layer of a proton-exchange membrane (PEM) water electrolyzer, triple-phase boundary (TPB) is mainly distributed on surface ultrafine iridium-based catalysts encapsulated by ionomer within catalyst-ionomer agglomerate. It found that at TPB acts as barrier to mass transport and buffer for bubble coverage during oxygen evolution reaction (OER). The effect can decrease OER performance inside agglomerate ≤23%, while separate sites from sites, turning instant deactivation...
Abstract The development of efficient and inexpensive bifunctional electrocatalysts with high activity durability for both the hydrogen evolution reaction (HER) oxygen (OER) are highly desirable but challenging. Herein, we report design preparation tungsten‐doped cobalt phosphide nanoneedle arrays on conductive carbon cloth (W−CoP/CC) as stable HER OER overall water splitting. array provides enriched active sites facilitates ion diffusion 3D CC skeleton enables fast charge transport....
Understanding the oxygen transport mechanism through an ionomer film that covered catalyst surface is essential for reducing local resistance and improving low Pt-loading proton exchange membrane fuel cell performance. Besides material, carbon supports, upon which ionomers particles are dispersed, also play a crucial role in transport. Increasing attention has been paid to effects of supports on transport, but detailed still unclear. Herein, transports based conventional solid (SC)...
Rationally engineering the surface physicochemical properties of nanomaterials can improve their activity and durability for various electrocatalytic energy conversion applications. Cu-Pd/Ir (CPI) nanospheres (NSs) anchored on N-doped porous graphene (NPG) [(CPI NSs/NPG)] have been recently demonstrated as a promising electrocatalyst alkaline ethanol oxidation reaction (EOR); to further enhance performance, NPG-supported CPI NSs are coated with Au submonolayer (SML) shells (SMSs), through...
Composition-graded Cu–Pd nanospheres are annealed for highly efficient alkaline oxygen reduction reaction, and further coated with Pt monolayer shells high-performance acidic reaction.
Transition-metal phosphides are a series of potential electrocatalysts in many electrochemical processes, among which CoP attracts the most attention because its high stability, abundance, and low cost. In this article, we calculate both hydrogen evolution reaction (HER) nitrogen reduction (NRR) processes on (101) facets M-doped (M = Mn, Fe, Ni, Cu). Mn Fe doping leads to higher d band centers metal sites surface, all adsorptions stronger than those nondoped CoP. Ni Cu causes lower weakens...
The performance of proton exchange membrane water electrolysis (PEMWE) is crucial for its commercialization. electrode assembly (MEA) preparation process determines the catalyst layer’s (CL) structure, thereby influencing PEMWE performance. Herein, effects conventional methods, i.e., direct spray deposition and decal transfer, on CL were investigated. It was found that MEA prepared via exhibits lower activation Ohmic overpotential. For transfer CL, this due to improved electrochemically...
Abstract Iridium (Ir) is the most active and durable anode catalyst for oxygen evolution reaction (OER) proton exchange membrane water electrolyzers (PEMWEs). However, their large‐scale applications are hindered by high costs scarcity of Ir. Lowering Ir loadings below 1.0 mgcm −2 causes significantly reduced PEMWE performance durability. Therefore, developing efficient low Ir‐based catalysts critical to widely commercializing PEMWEs. Herein, an approach presented designing porous metal...
The local collaborative structure further stabilizes the OOH*/OH* and weakens on metal site by hydrogen bond repulsive interaction, for which scaling relationship of ORR could be broken.
Electrochemical nitrogen reduction reaction (NRR) is intensively investigated by researchers for its potential to be the next-generation technology produce ammonia. Many attempts have been made explore possibility of electrochemical ammonia production catalyzed noble metals. However, produced in most reported cases ppm level or even lower, which susceptible contaminants experiments, leading fluctuating contradictory results. Herein, a rigorous procedure was adopted systematically evaluated...