文献类型：期刊文献

英文题名：Inherently evolved Cr-riveted protective film on stainless steel enabling stable seawater splitting

作者：Hong, Hongming[1];Li, Jiankun[1];Li, Shiyi[1];Lei, Linfeng[1,3];Lin, Yuqing[2];Zhu, Minghui[1];Zhuang, Linzhou[1];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Suzhou Lab, Suzhou 215000, Peoples R China

年份：2025

卷号：309

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20251118053310);WOS:【SCI-EXPANDED(收录号:WOS:001447861100001)】；

基金：The authors gratefully acknowledge the research funding provided by National Key R & D Program of China (Grant No. 2021YFB3801301) , National Natural Science Foundation of China (Grant Nos. 22378119, 22075076, and 22208092) , and Shanghai Pilot Program for Basic Research (22TQ1400100-4) .

语种：英文

外文关键词：Stainless steel; Protective film riveting; Chloride corrosion; Seawater splitting

摘要：Hydrogen production by seawater electrolysis faces challenges due to chloride-induced corrosion, necessitating expensive titanium anodes. Thus, a low-cost, high performance, and robust catalyst is urgently needed. Herein, we report a chromic acid-induced oxidation strategy to form an iron doped alpha-Ni(OH)2 protective film on stainless steel substrate (SS) to obtain the SS-Cr-Ox catalyst. The iron doped alpha-Ni(OH)2 could further inherently evolve into the dense iron doped gamma-NiOOH film with the leaching metal species of SS substrate. Cr species promotes the riveting of gamma-NiOOH film with the passivating layer of SS, while the SS skeleton also contributes to the great stability of SS-Cr-Ox. Therefore, the SS-Cr-Ox could stably operate for -100 h at 200 mA cm- 2 in the 0.1 M KOH + 0.6 M NaCl, and 75 h at 2 A cm- 2 in 1 M KOH + 2 M NaCl, far superior to the bare SS substrate and unriveted SS-NiFeCr catalyst.