文献类型：期刊文献

英文题名：Fe, Co-induced hydrolysis to prepare α-Ni (OH)₂/β-Ni(OH)₂ interfaces for improved overall water splitting efficiency

作者：Zhou, Guoxu Wang, Zining Zhang, Xichun Ji, Shan Wang, Rongfang Ma, Xianguo Wang, Xuyun Linkov, Vladimir Wang, Hui

第一作者：Zhou, Guoxu

通信作者：Ma, XG[1];Wang, H[2];Ji, S[3];Ji, S[4]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao, Peoples R China;[3]Tongji Univ, Sch Chem Sci & Engineer, 1239 Siping Rd, Shanghai 200092, Peoples R China;[4]Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing, Peoples R China;[5]Univ Western Cape, South African Inst Adv Mat Chem, ZA-7535 Cape Town, South Africa

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao, Peoples R China;corresponding author), Tongji Univ, Sch Chem Sci & Engineer, 1239 Siping Rd, Shanghai 200092, Peoples R China;corresponding author), Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2024

卷号：496

外文期刊名：ELECTROCHIMICA ACTA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001251423500001)】；

基金：The authors would like to thank the the Natural Science Foundation of the Shandong Province of China (ZR2020MB024) for financially supporting this work.

语种：英文

外文关键词：Hydrolysis effect; alpha-Ni(OH)(2)/beta-Ni(OH)(2) interfaces; High current density; Overall water splitting; Excellent stability

摘要：The development of effective bifunctional electrode materials is necessary for worldwide adoption of large-scale hydrogen production by water electrolysis. Nickel hydroxide - based transition metal materials are among the most promising electrodes for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). While Ni(OH)(2) exists in two crystalline states, namely alpha-Ni(OH)(2) and beta-Ni(OH)(2), neither can meet requirements for effective bifunctional electrode materials on their own, due to relatively low catalytic activity. In this study, bifunctional catalysts with alpha-Ni(OH)(2)/beta-Ni(OH)(2) interfaces, prepared using Fe, Co-induced hydrolysis, have been successfully applied for electrolytic water splitting. According to physical characterization, Fe3+ and Co2+ are incorporated into Ni(OH)(2) layers, where Fe doping leads to the formation of a regular flake structure, while Co doping facilitates surface electron transfer, enhancing electrocatalytic activity towards HER and OER. Overpotentials of the obtained catalysts at 100 mA.cm(-2) are as low as 224 mV for HER and 324 mV for OER. Both HER and OER overpotentials remained almost unchanged after 24 h operation at a high current density of 1 A.cm(-2), demonstrating excellent stability of the newly prepared materials during water electrolysis. The synthesis of alpha-Ni(OH)(2)/beta-Ni(OH)(2) interfaces is a new direction for the manufacturing of industrially applicable water splitting electrocatalysts suitable for high current density operation.