Preparation and electrocatalytic performance of novelintegrated Ni-Mo sulfide electrode materials for water splitting  

作　　者：Shan-Shan Li Qing-He Yu Jing Mi Lei Hao Li-Jun Jiang Shu-Xian Zhuang 

机构地区：[1]GRIMAT Engineering Institute Co.,Ltd,Beijing,101407,China [2]National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy,China GRINM Group Co.,Ltd.,Beijing,100088,China [3]Carbon Neutrality Research Center,State Power Investment Corporation Central Research Institute,Beijing,102209,China

出　　处：《Rare Metals》2024年第12期6384-6393,共10页稀有金属(英文版)

基　　金：financially supported by the National Key R&D Projects(No.2021YFB4000300)。

摘　　要：Advanced electrode materials for electrocatalysis of electrolytic decomposition are crucial materials in the field of hydrogen production from renewable energy.In this work,a new type of integrated hydrogen evolution electrode material was synthesized by selective acidification etching and in situ growth technology.A no vel-integrated Ni-Mo sulfide electrode material with a threedimensional network structure was successfully prepared using a two-step method(convenient surface modification and in situ growth techniques),which involved surface modification at 30%HNO_(3) for 10 min and followed by annealing treatment at 600℃ for 1 h with 10℃·min^(-1) heating rate.The structure displayed an electrochemical active surface area(ECSA)of 30.125 mF·cm^(-2),calculated on 0.10-0.30 V(vs.RHE)CV curves with a 5-50 mV·s^(-1)sweep rate range.The ECS A of other samples was also tested by aforementioned methods,which had great distinction on ECS A with different samples.The novel-integrated Ni-Mo sulfide electrode material appeared to have extremity electrochemical performance in a three-electrode configuration employing 1 M KOH solution as an electrolyte,including an excellent hydrogen evolution overpotential of 346 mV at the current density of500 mA·cm^(-2),superior Tafel slope with 103 mV·dec^(-1).Such outstanding electrochemical performances of the novel-integrated Ni-Mo sulfide electrode materials were directly related to the distinctive integrated structure.Therefore,it was facility to find that the successful preparation of novel-integrated Ni-Mo sulfide electrode material provided more selection opportunities for alkaline electrolysis of water and offered an innovative mentality for the preparation of other types of electrode materials.

关 键 词：Novel-integrated electrode materials Water splitting Surface modification In-situ growth technology 

分 类 号：TQ116.2[化学工程—无机化工] O643.36[理学—物理化学]