A5027764547- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
- Advanced battery technologies research
- Advanced Photocatalysis Techniques
- Ammonia Synthesis and Nitrogen Reduction
- Fuel Cells and Related Materials
- Supercapacitor Materials and Fabrication
- MXene and MAX Phase Materials
- Nanomaterials for catalytic reactions
- Catalysis and Hydrodesulfurization Studies
- Electronic and Structural Properties of Oxides
- CO2 Reduction Techniques and Catalysts
- Advancements in Battery Materials
- 2D Materials and Applications
- Hydrogen Storage and Materials
- Catalysis and Oxidation Reactions
- Advanced Memory and Neural Computing
- Advanced ceramic materials synthesis
- Copper-based nanomaterials and applications
- Ionic liquids properties and applications
- Electrochemical Analysis and Applications
- Recycling and utilization of industrial and municipal waste in materials production
- Gas Sensing Nanomaterials and Sensors
- Advanced materials and composites
- Machine Learning in Materials Science
University of California, Irvine
2022-2025
Irvine University
2022-2025
National University of Singapore
2018-2024
Southeast University
2021-2024
Samueli Institute
2023-2024
University of Science and Technology Liaoning
2020
Tianjin University
2016-2018
Northwestern Polytechnical University
2013
Exploration of cheap, efficient, and highly durable transition-metal-based electrocatalysts is critically important for the renewable energy chain, including both storage conversion. Herein, we have developed cobalt (Co) single atoms anchored in porous nitrogen-doped carbon nanoflake arrays, synthesized from Co-MOF precursor followed by removal unwanted Co clusters. The well-dispersed are attached to network through N–Co bonding, where there extra porosity active surface area created metal...
Artificial nitrogen fixation through the reduction reaction (NRR) under ambient conditions is a potentially promising alternative to traditional energy-intensive Haber–Bosch process. For this purpose, efficient catalysts are urgently required activate and reduce into ammonia. Herein, by combination of experiments first-principles calculations, we demonstrate that copper single atoms, attached in porous nitrogen-doped carbon network, provide highly NRR electrocatalysis, which compares...
Abstract For mass production of high‐purity hydrogen fuel by electrochemical water splitting, seawater electrolysis is an attractive alternative to the traditional freshwater due abundance and low cost in nature. However, undesirable chlorine ion oxidation reactions occurring simultaneously with greatly hinder overall performance electrolysis. To tackle this problem, electrocatalysts high activity selectivity purposely modulated coordination alkaline environment are urgently required....
Previous research of molybdenum-based electrocatalysts for nitrogen reduction reaction (NRR) has been largely considered on either isolated Mo single atoms (MoSAs) or carbide particles (e.g., Mo2 C) separately, while an integrated synergy (MoSAs-Mo2 the two never considered. The theoretical calculations show that and C nanoparticles exhibit, respectively, different catalytic hydrogen evolution NRR selectivity. Therefore, a new role-playing synergistic mechanism can be well enabled multistep...
Abstract Hierarchical nanostructured architectures are demonstrated as an effective approach to develop highly active and bifunctional electrocatalysts, which urgently required for efficient rechargeable metal–air batteries. Herein, a mesoporous hierarchical flake arrays (FAs) structure grown on flexible carbon cloth, integrated with the microsized nitrogen‐doped (N‐doped C) FAs, nanoscaled P‐doped CoSe 2 hollow clusters atomic‐level P‐doping (P‐CoSe /N‐C FAs) is described. The P‐CoSe FAs...
Metal nitrides are widely recognized as a class of desirable supercapacitor electrode materials owing to their high electrical conductivity and structural stability. Embedding metal nanoparticles in can further enhance the for electron transport. Herein, heterostructure consisting Ni-doped Co–Co2N is synthesized by simple thermal annealing metal–organic framework (MOF)-derived NiCo2O4 ammonia atmosphere, process which MOF-derived two-dimensional (2D) nanoflake arrays were well retained,...
Abstract Interfacial engineering of heterostructured catalysts has attracted great interest in enabling both hydrogen and oxygen evolution reactions (HER OER), by fine tuning the interfacial geometry electronic structures. However, they are not well structured for high‐performing bifunctionalities, largely due to confined single particle morphologies, where exposed surfaces interfaces limited. Herein, a hollow nanoframing strategy is purposely devised interconnected Co 3 O 4 –Mo 2 N...
Abstract As a favorite descriptor, the size effect of Cu‐based catalysts has been regularly utilized for activity and selectivity regulation toward CO 2 /CO electroreduction reactions (CO /CORR). However, little progress made in regulating Cu nanoclusters at atomic level. Herein, size‐gradient from single atoms (SAs) to subnanometric clusters (SCs, 0.5–1 nm) (NCs, 1–1.5 on graphdiyne matrix are readily prepared via an acetylenic‐bond‐directed site‐trapping approach. Electrocatalytic...
Abstract There is an intensive search for heterogeneous single atom catalysts (SACs) of high activity, efficiency, durability, and selectivity a wide variety electrocatalytic conversion chemical reactions, such as the hydrogen evolution reaction (HER), oxygen evolution/reduction (OER ORR), CO 2 reduction (CO RR), nitrogen (NRR). With downsizing from nanoparticles clusters to atoms, there are steady changes in bond coordination environment each every involved. Indeed, atoms these...
The coordination environment of single-atom catalysts (SACs) plays a crucial role in determining the energy conversion efficiency related electrochemical devices. Herein, series Co-based SACs (Co1-SACs) was tuned to correlate chemical structures these with their electrocatalytic performance. optimized Co1-SACs containing Co-S2N2 sites are electrocatalytically active both oxygen reduction reaction (ORR) and hydrogen evolution (HER), which were carried out alkaline media. exhibit high ORR...
Electrocatalytic reduction of waste nitrates (NO3-) enables the synthesis ammonia (NH3) in a carbon neutral and decentralized manner. Atomically dispersed metal-nitrogen-carbon (M-N-C) catalysts demonstrate high catalytic activity uniquely favor mono-nitrogen products. However, reaction fundamentals remain largely underexplored. Herein, we report set 14; 3d-, 4d-, 5d- f-block M-N-C catalysts. The selectivity NO3- to NH3 media, with specific focus on deciphering role NO2- intermediate...
Abstract Single-atom catalysts (SACs) offer efficient metal utilization and distinct reactivity compared to supported nanoparticles. Structure-function relationships for SACs often assume that active sites have uniform coordination environments at particular binding on support surfaces. Here, we investigate the distribution of Pt SAs dispersed shape-controlled anatase TiO 2 supports specifically exposing (001) (101) are found surface, consistent with existing structural models, whereas those...
Abstract The reconstruction of Cu catalysts during electrochemical reduction CO 2 is a widely known but poorly understood phenomenon. Herein, we examine the structural evolution nanocubes under reaction and its relevant conditions using identical location transmission electron microscopy, cyclic voltammetry, in situ X-ray absorption fine structure spectroscopy ab initio molecular dynamics simulation. Our results suggest that reconstruct via hitherto unexplored yet critical pathway - alkali...
Abstract As cost‐effective catalysts, platinum (Pt) single‐atom catalysts (SACs) have attracted substantial attention. However, most studies indicate that Pt SACs in acidic hydrogen evolution reaction (HER) follow the slow Volmer‐Heyrovsky (VH) mechanism instead of fast kinetic Volmer‐Tafel (VT) pathway. Here, this work propose VH can be switched to faster VT pathway for efficient HER by correlating single atoms (SAs) with clusters (Cs). Our calculations reveal correlation between SAs and Cs...
Abstract The electrochemical reduction of nitrates (NO 3 − ) enables a pathway for the carbon neutral synthesis ammonia (NH ), via nitrate reaction RR), which has been demonstrated at high selectivity. However, to make NH cost‐competitive with current technologies, partial densities (j NH3 must be achieved reduce levelized cost . Here, NO RR activity Fe‐based materials is leveraged synthesize novel active particle‐active support system Fe 2 O nanoparticles supported on atomically dispersed...
Transition-metal dichalcogenides (TMDs), such as molybdenum disulfide (MoS2), have emerged a generation of nonprecious catalysts for the hydrogen evolution reaction (HER), largely due to their theoretical adsorption energy close that platinum. However, efforts activate basal planes TMDs primarily centered around strategies introducing numerous atomic vacancies, creating vacancy–heteroatom complexes, or applying significant strain, especially acidic media. These approaches, while potentially...