A5048609660- Electrocatalysts for Energy Conversion
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Crystallography and molecular interactions
- Catalytic Processes in Materials Science
- Electrochemical Analysis and Applications
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- CO2 Reduction Techniques and Catalysts
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Technologies Research
- Ammonia Synthesis and Nitrogen Reduction
- Supercapacitor Materials and Fabrication
- Advanced Photocatalysis Techniques
- Hydrogen Storage and Materials
- Hybrid Renewable Energy Systems
- Membrane-based Ion Separation Techniques
- Molecular Junctions and Nanostructures
- Advanced Memory and Neural Computing
- Nanomaterials for catalytic reactions
- Conducting polymers and applications
- Advanced biosensing and bioanalysis techniques
- COVID-19 and Mental Health
Shanghai Jiao Tong University
2016-2025
Hengshui University
2015-2025
Nanjing University
2016-2025
Nanjing General Hospital of Nanjing Military Command
2016-2025
Fudan University
2021-2025
Shenzhen University
2021-2024
Henan Normal University
2024
Southwest Petroleum University
2018-2024
Nanchang Hangkong University
2022-2024
Xi'an University of Technology
2024
We demonstrated that platinum (Pt) oxygen-reduction fuel-cell electrocatalysts can be stabilized against dissolution under potential cycling regimes (a continuing problem in vehicle applications) by modifying Pt nanoparticles with gold (Au) clusters. This behavior was observed the oxidizing conditions of O 2 reduction reaction and between 0.6 1.1 volts over 30,000 cycles. There were insignificant changes activity surface area Au-modified course cycling, contrast to sizable losses pure...
Peak performance: Electrochemical experiments show that the oxygen reduction reaction (ORR) on platinum monolayers supported various transition metals exhibits a volcano-type behavior (see graph). Calculations reveal bond-breaking occurs more easily as bond-making becomes harder, and why Pd-supported Pt monolayer (PtML/Pd(111)) has higher ORR activity than pure Pt(111).
The kinetics of oxygen reduction was studied in acid solutions on Pt monolayers deposited a Pd(111) surface and carbon-supported Pd nanoparticles using the rotating disk-ring electrode technique. These electrocatalysts were prepared by new method for depositing involving galvanic displacement an underpotentially Cu monolayer substrate characterized scanning tunneling transmission electron microscopies. O2 shows significant enhancement at nanoparticle surfaces comparison with reaction Pt(111)...
We determined, by the rotating disk electrode technique, kinetics of oxygen-reduction reaction (ORR) on surfaces single crystals Au(111), Ag(111), Pd(111), Rh(111), Ir(111), and Ru(0001), Pt monolayers deposited their surfaces, also nanoparticles these metals dispersed high-surface-area carbon. Plotting correlation between experimentally determined activities three types electrocatalysts with calculated metal d-band center energies, εd, revealed a volcano-type dependence. In all cases,...
We have synthesized a new class of electrocatalysts for the O2 reduction reaction, consisting mixed monolayer Pt and another late transition metal (Ir, Ru, Rh, Re, or Os) deposited on Pd(111) single crystal carbon-supported Pd nanoparticles. Several these exhibited very high activity increased stability against oxidation, as well 20-fold increase in mass-specific activity, compared with state-of-the-art all-Pt electrocatalysts. Their superior reflect low OH coverage Pt, caused by lateral...
This communication describes the preparation of carbon-supported truncated-octahedral Pt3Ni nanoparticle catalysts for oxygen reduction reaction. Besides composition, size, and shape controls, this work develops a new butylamine-based surface treatment approach removing long-alkane-chain capping agents used in solution-phase synthesis. These can have an area-specific activity as high 850 μA/cm2Pt at 0.9 V, which is ∼4 times better than commercial Pt/C catalyst (∼0.2 mA/cm2Pt V). The mass...
We investigated the oxygen-reduction reaction (ORR) on Pd monolayers various surfaces and alloys to obtain a substitute for Pt elucidate origin of their activity. The activity supported Ru(0001), Rh(111), Ir(111), Pt(111), Au(111) increased in following order: Pd/Ru(0001) < Pd/Ir(111) Pd/Rh(111) Pd/Au(111) Pd/Pt(111). Their was correlated with d-band centers, which were calculated using density functional theory (DFT). found volcano-type dependence energy center monolayers, Pd/Pt(111) at top...
We explored the origin of enhanced activity Pd-alloy electrocatalysts for O2 reduction reaction by correlating electrocatalytic intrinsic Pd and Pt surfaces overlayers on several substrates with their electronic properties, established volcano-type dependence binding energy oxygen d-band center top metal layer. Intrinsic bind too firmly to allow efficient removal adsorbed intermediates. Therefore, they do not have highest are volcano plot. A overlayer a Pd3Fe(111) alloy, was predicted lie...
Abstract Lithium ion batteries (LIBs) continuously prove themselves to be the main power source in consumer electronics and electric vehicles. To ensure environmental sustainability, LIBs must capable of performing well at extreme temperatures, that is, between −40 60 °C. In this review, recent important progress advances subzero elevated temperature operations is comprehensively summarized from a materials perspective. scenario limitations, electrolytes, anodes, solid electrolyte interphase...
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.
Ammonia is of great importance in fertilizer production and chemical synthesis. It can also potentially serve as a carbon-free energy carrier for future hydrogen economy. Motivated by worldwide effort to lower carbon emissions, ammonia synthesis lithium-mediated electrochemical nitrogen reduction (LiNR) has been considered promising alternative the Haber-Bosch process. A significant performance improvement LiNR achieved recent years exploration favorable lithium salt proton donor electrolyte...
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...
A feasible membrane electrode assembly (MEA) configuration is proposed for lithium-mediated electrochemical nitrogen reduction to ammonia, which shows the advantages of efficient gas transfer, reduced solvent consumption and compact configuration.
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...
Spitzenleistung: Elektrochemische Experimente ergaben für die Sauerstoffreduktion an Platinmonoschichten auf mehreren Übergangsmetallen ein Verhalten vom Vulkan-Typ (siehe Graph). Nach Berechnungen wird der Bindungsbruch einfacher, wenn Bindungsbildung schwieriger wird; sie erklären auch, warum Aktivität Pd aufgebrachten Pt-Monoschicht (PtML/Pd(111)) bei dieser Reduktion höher ist als von reinem Pt(111).