Engineering single atomic ruthenium on defective nickel vanadium layered double hydroxide for highly efficient hydrogen evolution  

作　　者：Xiaoyu Chen Jiawei Wan Meng Zheng Jin Wang Qinghua Zhang Lin Gu Lirong Zheng Xianzhu Fu Ranbo Yu 

机构地区：[1]College of Materials Science and Engineering,Shenzhen University,Shenzhen 518071,China [2]College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China [3]Department of Physical Chemistry,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing Institution,Beijing 100083,China [4]State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China [5]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [6]Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,China [7]Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [8]Key Laboratory of Advanced Material Processing&Mold,Ministry of Education,Zhengzhou University,Zhengzhou 450002,China

出　　处：《Nano Research》2023年第4期4612-4619,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51932001,51872024,52022097,and 22022508);the National Key Research and Development Program of China(No.2018YFA0703503);the Foundation of the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2020048);China Postdoctoral Science Foundation(No.2022M712167).

摘　　要：Fabricating single-atom catalysts(SACs)with high catalytic activity as well as great stability is a big challenge.Herein,we propose a precise synthesis strategy to stabilize single atomic ruthenium through regulating vanadium defects of nickel vanadium layered double hydroxides(NiV-LDH)ultrathin nanoribbons support.Correspondingly,the isolated atomically Ru doped NiV-LDH ultrathin nanoribbons(NiVRu-R)were successfully fabricated with a super-high Ru load of 12.8 wt.%.X-ray absorption spectrum(XAS)characterization further confirmed atomic dispersion of Ru.As catalysts for electrocatalytic hydrogen evolution reaction(HER)in alkaline media,the NiVRu-R demonstrated superior catalytic properties to the commercial Pt/C.Moreover,it maintained exceptional stability even after 5,000 cyclic voltammetry cycles.In-situ XAS and density functional theory(DFT)calculations prove that the Ru atomic sites are stabilized on supports through forming the Ru-O-V structure,which also help promote the catalytic properties through reducing the energy barrier on atomic Ru catalytic sites.

关 键 词：hydrogen evolution reaction layered double hydroxide ruthenium atomic site ultrathin nanoribbons 

分 类 号：O64[理学—物理化学]