A5074829223- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Supercapacitor Materials and Fabrication
- Particle physics theoretical and experimental studies
- Copper-based nanomaterials and applications
- Catalysis and Oxidation Reactions
- Fuel Cells and Related Materials
- High-Energy Particle Collisions Research
- Catalysis and Hydrodesulfurization Studies
- Catalysts for Methane Reforming
- Electrochemical Analysis and Applications
- Quantum Chromodynamics and Particle Interactions
- Advanced Battery Technologies Research
- Advanced X-ray Imaging Techniques
- Metal-Organic Frameworks: Synthesis and Applications
- CO2 Reduction Techniques and Catalysts
- X-ray Diffraction in Crystallography
- Nanomaterials for catalytic reactions
- Polyoxometalates: Synthesis and Applications
- 2D Materials and Applications
- Advanced Nanomaterials in Catalysis
Brookhaven National Laboratory
2019-2025
Stanford Synchrotron Radiation Lightsource
2010-2025
National Synchrotron Light Source II
2022-2025
Lanzhou University of Technology
2024
Agency for Science, Technology and Research
2013-2022
Institute of Chemical and Engineering Sciences
2013-2022
Yibin University
2008-2022
Comenius University Bratislava
2018-2020
Nanyang Technological University
2015-2020
Hebei Normal University
2020
Scanning electron microscopy, X-ray diffraction, cyclic voltammetry, chronoamperometry, in situ Raman spectroscopy, and absorption near-edge structure spectroscopy (XANES) were used to investigate the electrochemical oxygen evolution reaction (OER) on Cu, Cu2O, Cu(OH)2, CuO catalysts. Aqueous 0.1 M KOH was as electrolyte. All four catalysts oxidized or converted Cu(OH)2 during a slow anodic sweep of voltammetry exhibited similar activities for OER. A peak at 603 cm–1 appeared all samples...
Abstract A major limitation of MnO 2 in aqueous Zn/MnO ion battery applications is the poor utilization its electrochemical active surface area. Herein, it shown that by generating oxygen vacancies ( V O ) lattice, Gibbs free energy Zn 2+ adsorption vicinity can be reduced to thermoneutral value (≈0.05 eV). This suggests adsorption/desorption process on oxygen‐deficient more reversible as compared pristine . In addition, because fact fewer electrons are needed for ZnO bonding , valence...
The electrocatalytic reduction of CO2 into value-added chemicals such as hydrocarbons has the potential for supplying fuel energy and reducing environmental hazards, while accurate tuning electrocatalysts at ultimate single-atomic level remains extremely challenging. In this work, we demonstrate an atomic design multiple oxygen vacancy-bound, Cu-substituted CeO2 to optimize CH4. We carried out theoretical calculations predict that Cu substitution in CeO2(110) surface can stably enrich up...
The durability and reactivity of catalysts can be effectively precisely controlled through the careful design engineering their surface structures morphologies. Herein, we develop a novel "adsorption-calcination-reduction" strategy to synthesize spinel transitional metal oxides with unique necklace-like multishelled hollow structure exploiting sacrificial templates carbonaceous microspheres, including NiCo2O4 (NCO), CoMn2O4, NiMn2O4. Importantly, benefiting from reduction treatment offer...
Electrochemical conversion of CO2 into valued products is one the most important issues but remains a great challenge in chemistry. Herein, we report novel synthetic approach involving prolonged thermal pyrolysis hemin and melamine molecules on graphene for fabrication robust efficient single-iron-atom electrocatalyst electrochemical reduction. The single-atom catalyst exhibits high Faradaic efficiency (ca. 97.0 %) CO production at low overpotential 0.35 V, outperforming all Fe-N-C-based...
Developing high‐efficiency and low‐cost photocatalysts by avoiding expensive noble metals, yet remarkably improving H 2 evolution performance, is a great challenge. Noble‐metal‐free catalysts containing Co(Fe)NC moieties have been widely reported in recent years for electrochemical oxygen reduction reaction also gained noticeable interest organic transformation. However, to date, no prior studies are available the literature about activity of N‐coordinated metal centers photocatalytic...
Abstract Electrocatalysts based on hierarchically structured and heteroatom‐doped non‐noble metal oxide materials are of great importance for efficient low‐cost electrochemical water splitting systems. Herein, the synthesis a series hierarchical hollow nanoplates (NPs) composed ultrathin Co 3 O 4 nanosheets doped with 13 different atoms is reported. The involves cooperative etching−coordination−reorganization approach starting from zeolitic imidazolate framework‐67 (ZIF‐67) NPs. First, atom...
Cobalt-containing spinel oxides are promising electrocatalysts for the oxygen evolution reaction (OER) owing to their remarkable activity and durability. However, still needs further improvement related fundamentals remain untouched. The fact that tend form cation deficiencies can differentiate electrocatalysis from other oxide materials, example, most studied oxygen-deficient perovskites. Here, a systematic study of ZnFex Co2-x O4 (x = 0-2.0) toward OER is presented highly active catalyst...
Nanostructured transition metal dichalcogenides (TMDs) are proven to be efficient and robust earth-abundant electrocatalysts potentially replace precious platinum-based catalysts for the hydrogen evolution reaction (HER). However, catalytic efficiency of reported TMD is still limited by their low-density active sites, low conductivity, and/or uncleaned surface. Herein, a general facile method high-yield, large-scale production water-dispersed, ultrasmall-sized, high-percentage 1T-phase,...
To construct photocatalytically active MOFs, various strategies have recently been developed. We synthesized and characterized a new metal–organic framework (MOF-253-Pt) material through immobilizing platinum complex in 2,2′-bipyridine-based microporous MOF (MOF-253) using post-synthesis modification strategy. The functionalized MOF-253-Pt serves both as photosensitizer photocatalyst for hydrogen evolution under visible-light irradiation. photocatalytic activity of is approximately five...
Abstract Wireless techniques have improved life quality for many. However, the drawbacks like instable signal and high loss in air of electromagnetic interference hinder its further development. One solution is to develop a smart material or device, which can selectively receive specific frequency ( f s ) wave with less loss, simultaneously show effective shielding against unwanted waves (frequency denoted as p ). A bottleneck has been reached, such that using materials alone unable achieve...
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...
Exploring robust catalysts for water oxidation in acidic electrolyte is challenging due to the limited material choice. Iridium (Ir) only active element with a high resistance acid corrosion during electrolysis. However, Ir rare, and its large-scale application could be possible if intrinsic activity of greatly enhanced. Here, pseudo-cubic SrCo0.9Ir0.1O3-δ perovskite, containing corner-shared IrO6 octahedrons, designed. The catalyst shows an extremely as reflected from turnover frequency,...
Significance Photocatalysts frequently require simultaneous loading of oxidative and reductive cocatalysts to achieve both efficient half-reactions within a single material. Nevertheless, unregulated distribution two will result in direct contact between oxidation reduction centers, leading detrimental charge recombination. This research presents center/edge approach load redox with controlled physical separation atomistic scale using single-atom architecture. spatial is critical for...
LaCoO3 is an active, stable catalyst in alkaline solution for oxygen evolution reaction (OER). With lower cost, it a potential alternative to precious metal oxides like IrO2 and RuO2 water electrolysis. However, room still remains improving its activity according recent understandings of OER on perovskite oxides. In this work, Fe substitution has been introduced boost performance. Density function theory (DFT) calculation verified that the enhanced performance originates from Co 3d-O 2p...
Abstract Developing efficient and low-cost electrocatalysts for oxygen evolution reaction is crucial in realizing practical energy systems sustainable fuel production storage from renewable sources. However, the inherent linear scaling relation most catalytic materials imposes a theoretical overpotential ceiling, limiting development of electrocatalysts. Herein, using modeled Na x Mn 3 O 7 materials, we report an effective strategy to construct better electrocatalyst through tuning both...
Developing highly active electrocatalysts for oxygen evolution reaction (OER) is critical the effectiveness of water splitting. Low-cost spinel oxides have attracted increasing interest as alternatives to noble metal-based OER catalysts. A rational design catalysts can be guided by studying structural/elemental properties that determine mechanism and activity. Here, using density functional theory (DFT) calculations, it found relative position O p-band MOh (Co Ni in octahedron) d-band center...