Etching‑Induced Surface Reconstruction of NiMoO_(4) for Oxygen Evolution Reaction  

作　　者：Jinli Zhu Jinmei Qian Xuebing Peng Baori Xia Daqiang Gao 

机构地区：[1]Key Laboratory for Magnetism and Magnetic Materials of MOE,Key Laboratory of Special Function Materials and Structure Design of MOE,Lanzhou University,Lanzhou 730000,People’s Republic of China

出　　处：《Nano-Micro Letters》2023年第2期271-282,共12页纳微快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.12004146);Natural Science Foundation of Gansu Province,China(Nos.20JR5RA303 and 20JR10RA648);the Fundamental Research Funds for the Central Universities(No.LZUMMM2022007).

摘　　要：Rational reconstruction of oxygen evolution reaction(OER)precatalysts and performance index of OER catalysts are crucial but still challenging for universal water electrolysis.Herein,we develop a double-cation etching strategy to tailor the electronic structure of NiMoO_(4),where the prepared NiMoO_(4) nanorods etched by H_(2)O_(2) reconstruct their surface with abundant cation deficiencies and lattice distortion.Calculation results reveal that the double cation deficiencies can make the upshift of d-band center for Ni atoms and the active sites with better oxygen adsorption capacity.As a result,the optimized sample(NMO-30M)possesses an overpotential of 260 mV at 10 mA cm−2 and excellent long-term durability of 162 h.Importantly,in situ Raman test reveals the rapid formation of high-oxidation-state transition metal hydroxide species,which can further help to improve the catalytic activity of NiMoO_(4) in OER.This work highlights the influence of surface remodification and shed some light on activating catalysts.

关 键 词：ETCHING Surface reconstruction Cation deficiencies OER 

分 类 号：TQ116.1[化学工程—无机化工]