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Unveiling the Cation Dependence in Alkaline Hydrogen Evolution by Differently-Charged Ruthenium/Molybdenum Sulfide Hybrids.
Adv Mater
November 2024
Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, P. R. China.
Article Synopsis
- The hydrogen evolution reaction (HER) is hindered in alkaline water electrolysis due to slow kinetics, which are affected by the catalyst's surface structure and the type of cations in the electrolyte.
- Researchers used different charged molybdenum sulfide (MoS) cluster supports to create hybrid catalysts with Ru, revealing that the charge of the MoS affects the valence state of Ru and, consequently, the catalyst’s efficiency.
- This study highlights how the cation dependence in HER is influenced by the accumulation of cations on the catalyst surface, enhancing understanding of HER mechanisms and suggesting ways to optimize electrode and electrolyte interfaces for improved performance.
Tubular-like Nanocomposites with Embedded CuS-MoS Crystalline-Amorphous Heterostructure in N-Doped Carbon as Li-Ion Batteries Anode toward Ultralong Cycling Stability.
ACS Appl Mater Interfaces
August 2024
School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China.
Transition metal sulfides (TMSs) show the potential to be competitive candidates as next-generation anode materials for Li-ion batteries (LIBs) due to their high theoretical specific capacity. However, sluggish ionic/electronic transportation and huge volume change upon lithiation/delithiation remain major challenges in developing practical TMS anodes. We rationally combine structural design and interface engineering to fabricate a tubular-like nanocomposite with embedded crystalline CuS5 nanoparticles and amorphous MoS in a carbon matrix (C/CuS-MoS NTs).
View Article and Find Full Text PDFEnhancing photocatalytic HO production with Au co-catalysts through electronic structure modification.
Nat Commun
April 2024
Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 68 Jincheng Street, Wuhan, P. R. China.
Gold-based co-catalysts are a promising class of materials with potential applications in photocatalytic HO production. However, current approaches with Au co-catalysts show limited HO production due to intrinsically weak O adsorption at the Au site. We report an approach to strengthen O adsorption at Au sites, and to improve HO production, through the formation of electron-deficient Au sites by modifying the electronic structure.
View Article and Find Full Text PDFStructural regulation of amorphous molybdenum sulfide by atomic palladium doping for hydrogen evolution.
J Colloid Interface Sci
July 2024
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China; Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Shandong Energy Institute, Qingdao New Energy Shandong Laboratory, Qingdao 266101, China. Electronic address:
Molybdenum sulfide materials have long been considered as attractive non-precious-metal electrocatalysts for the hydrogen evolution reaction (HER). However, comparing with the crystalline counterpart, amorphous MoS has been less investigated previously. We here propose to increase the catalytical activity of a-MoS by raising the reactant concentration at the catalytic interface via a chemical doping approach.
View Article and Find Full Text PDFCorrelation of Fabrication Methods and Enhanced Wear Performance in Nanoporous Anodic Aluminum Oxide with Incorporated Molybdenum Disulfide (MoS) Nanomaterials.
Nanomaterials (Basel)
February 2024
Finishing Manufacturing Science, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Wear performance is integral to component longevity, minimizing industrial waste and excess energy costs in a wide variety of applications. Anodized aluminum oxide (AAO) has many beneficial properties leading to its wide use across industries as a surface treatment for many aluminum components, but the wear properties of the coating could be improved significantly. Here, we used an electrochemical method to incorporate molybdenum disulfide (MoS), a nanomaterial used as a dry lubricant, to modify alloys of aluminum during AAO preparation.
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