摘要
The construction of highly stable and efficient electrocatalysts is desirable for seawater splitting but remains challenging due to the high concentration of Cl-in seawater.Herein,FeOOH/Ni(OH)_(2)heterostructure supported on Ni_(3)S_(2)-covered nickel foam(Fe–Ni/Ni_(3)S_(2)/NF)was fabricated by hydrothermal and etching methods,as well as anodic oxidation process.The electronic structure of FeOOH and Ni(OH)_(2)could be modulated after depositing FeOOH nanoparticles on Ni(OH)_(2)nanosheet,which greatly boosted the catalytic activity.When the catalyst used as an electrode for oxygen evolution reaction(OER),it needed low overpotentials of 266 and 368 m V to achieve current densities of 100 and 800 m A·cm^(-2),respectively,in 1 mol·L^(-1)KOH+seawater electrolyte.It can operate continuously at 100 m A·cm^(-2)for 400 h without obvious decay.Particularly,in situ generated SO_(4)^(2-)from inner Ni_(3)S_(2)during electrolysis process would accumulate on the surface of active sites to form passivation layers to repel Cl^(-),which seemed to be responsible for superior stability.The study not only synthesizes an OER catalyst for highly selective and stable seawater splitting,but also gives a novel approach for industrial hydrogen production.
出处
《Rare Metals》
SCIE
EI
CAS
CSCD
2024年第5期1989-1998,共10页
稀有金属（英文版）
基金
supported by the National Natural Science Foundation of Shandong Province(Nos.ZR2022QB062 and ZR2021MB070)
the DNL Cooperation Fund(No.DNL202010),Research Innovation Fund(No.QIBEBTSZ201801)
the DICP and QIBEBT(No.UN201804)。
作者简介
Han-Pu Liang,e-mail:lianghp@qibebt.ac.cn。
