文献类型：期刊文献

英文题名：Structural Buffer Engineering on Metal Oxide for Long-Term Stable Seawater Splitting

作者：Zhuang, Linzhou[1];Li, Jiankun[1];Wang, Keyu[1];Li, Zhiheng[2];Zhu, Minghui[1];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]China Univ Petr, Sch Chem Engn, Qingdao 266580, Peoples R China

年份：2022

卷号：32

期号：25

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20221111799192);WOS:【SCI-EXPANDED(收录号:WOS:000769482600001)】；

基金：This work was financially supported by the National Natural Science Foundations of China (Grant No. 21908054 and 22005098), and Central Government Funds for Guiding Local Science and Technology Development (Grant No. 2021Szvup040). And the authors sincerely thank the Shanghai Synchrotron Radiation Facility (BL14W1, SSRF) for XAS equipment access.

语种：英文

外文关键词：seawater splitting; lattice chloride; structural buffer; oxygen evolution reaction; long-term stability

摘要：Seawater electrolysis is an attractive technique for massive green hydrogen production owing to the dominant advantages of seawater resources, namely low-cost and limitlessness. However, the oxygen evolution reaction (OER) catalysts will be easily deactivated for severe seawater Cl- permeation and corrosion. Herein, a structural buffer engineering strategy is reported to endow the Co-2(OH)(3)Cl with long-term operation stability and a high OER selectivity of approximate to 99.6% in seawater splitting. The lattice Cl- of Co-2(OH)(3)Cl can act as the structural buffer, whose continuous leaching during OER can leave vacancies for seawater Cl- invasion, so as to avoid catalyst deactivation. Accordingly, Co-2(OH)(3)Cl can maintain 99.9% of its initial current density after 60 000 s operation, while that of Co(OH)(2) decays by 52.7% in 7 000 s. Meanwhile, the lattice Cl- of Co-2(OH)(3)Cl can optimize the binding energy of reaction intermediates on the neighboring O-Co-O site. Thus, Co-2(OH)(3)Cl exhibits a current density of 330.5 mA cm(-2) at the potential of 1.63 V versus RHE, 45.9 times higher than that of Co(OH)(2). The structural buffer strategy may be applied to incorporate other metal oxides with suitable anions, and effectively boost their OER activity and stability in alkaline seawater.