A5052565332- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
- Advanced Memory and Neural Computing
- Supercapacitor Materials and Fabrication
- Neuroscience and Neural Engineering
- Electrochemical Analysis and Applications
- Layered Double Hydroxides Synthesis and Applications
- EEG and Brain-Computer Interfaces
- Conducting polymers and applications
- Minerals Flotation and Separation Techniques
- Nanomaterials for catalytic reactions
- Machine Learning in Materials Science
- Iron oxide chemistry and applications
- Gas Sensing Nanomaterials and Sensors
- Polymer Nanocomposites and Properties
- CO2 Reduction Techniques and Catalysts
- Surfactants and Colloidal Systems
- Pancreatic function and diabetes
- Catalysis and Oxidation Reactions
- Polyoxometalates: Synthesis and Applications
- Catalysis for Biomass Conversion
- Catalysis and Hydrodesulfurization Studies
Beijing University of Chemical Technology
2017-2025
University of Toronto
1994-2024
Northwestern University
2023-2024
State Key Laboratory of Chemical Engineering
2018-2024
Tsinghua University
2022-2023
China National Nuclear Corporation
2023
Rogers (United States)
2023
Xinjiang Institute of Engineering
2023
Hebei University of Science and Technology
2023
Nanyang Technological University
2018-2022
Abstract NiFe‐based layered double hydroxides (LDHs) are among the most efficient oxygen evolution reaction (OER) catalysts in alkaline medium, but their long‐term OER stabilities questionable. In this work, it is demonstrated that structure makes bulk NiFe LDH intrinsically not stable and deactivation mechanism of further revealed. Both operando electrochemical structural characterizations show interlayer basal plane contributes to activity, slow diffusion proton acceptors (e.g., OH − )...
The binding strength of reactive intermediates with catalytically active sites plays a crucial role in governing catalytic performance electrocatalysts. NiFe hydroxide offers efficient oxygen evolution reaction (OER) catalysis alkaline electrolyte, however weak oxygenated on still badly limits its activity. Now, facile ball-milling method was developed to enhance via generating tensile strain, which reduced the anti-bonding filling states d orbital and thus facilitated adsorption. strain...
Exploring materials with regulated local structures and understanding how the atomic motifs govern reactivity durability of catalysts are a critical challenge for designing advanced catalysts. Herein we report tuning structure nickel-iron layered double hydroxides (NiFe-LDHs) by partially substituting Ni2+ Fe2+ to introduce Fe-O-Fe moieties. These -containing NiFe-LDHs exhibit enhanced oxygen evolution reaction (OER) activity an ultralow overpotential 195 mV at current density 10 mA cm-2 ,...
Abstract Ternary NiCoFe‐layered double hydroxide (NiCo III Fe‐LDH) with Co 3+ is grafted on nitrogen‐doped graphene oxide (N‐GO) by an in situ growth route. The array‐like colloid composite of NiCo Fe‐LDH/N‐GO used as a bifunctional catalyst for both oxygen evolution/reduction reactions (OER/ORR). array has 3D open structure less stacking LDHs and enlarged specific surface area. hierarchical design novel material chemistry endow high activity propelling O 2 redox. By exposing more amounts Ni...
Abstract Hydrogen evolution reaction (HER) has prospect to becoming clean and renewable technology for hydrogen production Ni–Mo alloy is among the best HER catalysts in alkaline electrolytes. Here, an situ topotactic reduction method synthesize ultrathin 2D nanosheets electrocatalytic reported. Due its structure tailored composition, as‐synthesized shows overpotential of 35 mV reach a current density 10 mA cm −2 , along with Tafel slope 45 decade −1 demonstrating comparable intrinsic...
Reducing Mn<sup>2+</sup> ions were doped to tailor the electronic structure of Ni and Fe sites in NiFe-layered double hydroxides.
Noble metals have an irreplaceable role in catalyzing electrochemical reactions. However, large overpotential and poor long-term stability still prohibit their usage many reactions (e.g., oxygen evolution/reduction). With regard to the low natural abundance, improvement of overall electrocatalytic performance (activity, selectivity, stability) was urgently necessary. Herein, strong metal-support interaction (SMSI) modulated through unprecedented time-dependent mechanical milling method on...
Acidic water electrolysis enables the production of hydrogen for use as a chemical and fuel. The acidic environment hinders on non-noble catalysts, result sluggish kinetics associated with adsorbate evolution mechanism, reliant it is four concerted proton-electron transfer steps. Enabling faster mechanism catalysts will help to further advance electrolysis. Here, we report evidence that doping Ba cations into Co3O4 framework form Co3-xBaxO4 promotes oxide path simultaneously improves...
Seawater electrolysis offers a renewable, scalable, and economic means for green hydrogen production. However, anode corrosion by Cl
The growth process of interfacial nanobubbles during the initial stage hydrogen evolution reaction, and their influence on overpotential were revealed by in situ electrochemical surface plasmon resonance imaging combined with atomic force microscopy.
Abstract Low-energy consumption seawater electrolysis at high current density is an effective way for hydrogen production, however the continuous feeding of may result in accumulation Cl − , leading to severe anode poisoning and corrosion, thereby compromising activity stability. Herein, CoFeAl layered double hydroxide anodes with excellent oxygen evolution reaction are synthesized delivered stable catalytic performance 350 hours 2 A cm −2 presence 6-fold concentrated seawater. Comprehensive...
Abstract Commercial alkaline water electrolysers typically operate at 80 °C to minimize energy consumption. However, NiFe‐based catalysts, considered as one of the most promising candidates for anode, encounter bottleneck high solubility such temperatures. Herein, we discover that dissolution NiFe layered double hydroxides (NiFe‐LDH) during operation not only leads degradation anode itself, but also deactivates cathode splitting, resulting in decay overall electrocatalytic performance....
Abstract Introducing oxygen vacancies to metal oxide materials would improve their catalytic activity but usually needs reductive reagents (e.g., H 2 ) and high temperatures >600 °C), which is unsafe, complex, time consuming. Herein, a fast (30 s) facile (operated at ambient conditions) flame‐engraved method used introduce abundant well‐defined hexagonal cavities with (110) edges nickel–iron layered double hydroxides (NiFe‐LDH). Abundant vacancies, lower coordination numbers,...
Abstract Hydrogen gas has been regarded as an ideal energy source that could replace the need of fossil fuels, based on its high density with zero carbon emissions. The production hydrogen via electrolysis water is not a new field, but technology seen significant advancements in recent times, owing to proportional growing demand clean and affordable energy. This review discusses most progresses achieved area earth abundant catalysis, particularly, non‐precious metal (Ni, Co, Fe, Mo, W)‐based...
Abstract Exploring materials with regulated local structures and understanding how the atomic motifs govern reactivity durability of catalysts are a critical challenge for designing advanced catalysts. Herein we report tuning structure nickel–iron layered double hydroxides (NiFe‐LDHs) by partially substituting Ni 2+ Fe to introduce Fe‐O‐Fe moieties. These ‐containing NiFe‐LDHs exhibit enhanced oxygen evolution reaction (OER) activity an ultralow overpotential 195 mV at current density 10 mA...