Low-cost transition-metal dichalcogenides (MS) have attracted great interest as alternative catalysts for hydrogen evolution. However, a significant challenge is the formation of sulfur-hydrogen bonds on MS (S-H), which will severely suppress hydrogen evolution reaction (HER). Here we report Cu nanodots (NDs)-decorated NiS nanotubes (NTs) supported on carbon fibers (CFs) (Cu NDs/NiS NTs-CFs) as efficient electrocatalysts for HER in alkaline media. The electronic interactions between Cu and NiS result in Cu NDs that are positively charged and can promote water adsorption and activation. Meanwhile, NiS NTs are negatively charged and can weaken S-H bonds formed on catalyst surfaces. Therefore, the Cu/NiS hybrids can optimize H adsorption and desorption on electrocatalysts and can promote both Volmer and Heyrovsky steps of HER. The strong interactions between Cu and NiS cause the Cu NDs/NiS NTs-CFs electrocatalysts to exhibit the outstanding HER catalytic performance with low onset potential, high catalytic activity, and excellent stability.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jacs.7b08521 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Homologous metal-organic complexes reconstructed oxy-hydroxide heterostructures as efficient oxygen evolution electrocatalysts.
J Colloid Interface Sci
January 2025
Key Laboratory of Eco-chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042 China. Electronic address:
It is imperative to investigate more cost-effective, long-lasting, efficient, and reliable non-noble metal electrocatalysts for the oxygen evolution reaction (OER) in hydrogen production via water splitting. Metal-organic complexes have been extensively researched and utilized for this purpose, yet their transformation in this process remains intriguing and underexplored. To enable a comprehensive comparison, we synthesized three types of metal-organic complexes with varying morphologies using the same raw material.
View Article and Find Full Text PDFSurface Reconstruction of An Integrated CoO-Co2Mo3O8 electrode Enabling Efficient Ampere-Level Hydrogen Evolution in Alkaline Water or Seawater.
Angew Chem Int Ed Engl
January 2025
University of Thessaly, Mechanical Engineering, Leoforos Athinon, Pedion Areos, 383 34, Volos, GREECE.
To accelerate the water dissociation in the Volmer step and alleviate the destruction of bubbles to the physical structure of catalysts during the alkaline hydrogen evolution, an integrated electrode of cobalt oxide and cobalt-molybdenum oxide grown on Ni foam, named CoO-Co2Mo3O8, is designed. This integrated electrode enhances the catalyst-substrate interaction confirmed by a micro-indentation tester, and thus hinders the destruction of the physical structure of catalysts caused by bubbles. Electrochemical testing shows the occurrence of a surface reconstruction of the integrated electrode, and CoO is transformed into Co(OH)2, denoted as Co(OH)2-Co2Mo3O8.
View Article and Find Full Text PDFElectrocatalytic synergy from Ni-enhanced WS for alkaline overall water splitting with tuning electronic structure and crystal phase transformation.
J Colloid Interface Sci
January 2025
Henan Key Laboratory of Polyoxometalate Chemistry, School of Energy Science and Technology, Henan University, Zhengzhou 450046, PR China. Electronic address:
Due to the limited active sites and poor conductivity, the application of tungsten disulfide (WS) in alkaline water electrolysis remains a challenge. Herein, Ni-WS nanosheet arrays were in situ grown on the carbon fiber paper (Ni-WS/CFP) as an electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media, and the introduction degree of Ni can be regulated by adjusting the electrodeposition time. When the electrodeposition time is 3 min, Ni ions are doped into the lattice of WS, and by prolonging the electrodeposition time to 10 min, the nickel disulfide (NiS) crystal phase is generated to form NiS@WS heterojunction.
View Article and Find Full Text PDFLattice coherency engineering trigger rapid charge transport at the heterointerface of Te/InO@MXene photocatalysts for boosting photocatalytic hydrogen evolution.
J Colloid Interface Sci
January 2025
College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, PR China; Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals, Qiqihar University, Qiqihar 161006, PR China. Electronic address:
The establishment of heterojunctions has been demonstrated as an effective method to improve the efficiency of photocatalytic hydrogen production. Conventional heterojunctions usually have random orientation relationships, and heterointerfaces can hinder photogenerated carrier transport due to larger lattice mismatches, thus reducing the photoelectric conversion efficiency. In this study, a novel Te/InO@MXene lattice coherency heterojunction was prepared by leveraging the identical lattice spacing of InO (222) and Te (021) crystal face.
View Article and Find Full Text PDFAtomically Dispersed Co-P Moieties via Direct Thermal Exfoliation for Alkaline Hydrogen Electrosynthesis.
J Am Chem Soc
January 2025
National Center for Nanoscience and Technology, No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, China.
The development of highly active and stable cathodes in alkaline solutions is crucial for promoting the commercialization of anion exchange membrane (AEM) electrolyzers, yet it remains a significant challenge. Herein, we synthesized atomically dispersed CoP moieties (CoP-SSC) immobilized on ultrathin carbon nanosheets via a phosphidation exfoliation strategy at medium temperature. The thermodynamic formation process of the Co-P moieties was elucidated using X-ray absorption spectroscopy (XAS) and theoretical calculations.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!