Bionic Design of Ni<sup>4+</sup> Lewis Acid Site Based on Selective Seawater Oxidation
Abstract
AbstractThe side reaction caused by chloride ions and the toxicity to the active site have always been the hindrance to the electrocatalyst of the oxygen evolution reaction (OER) for seawater splitting. Herein, inspired by the early flowering of damaged plants, we designed a catalyst rich in oxygen vacancies (Ovac) and proved that Ovac can accelerate the formation of Ni3+ and further oxidize it to Ni4+, which we named as the “ripening” mechanism of Ovac. Ovac reduces the hydrogen proton desorption energy by regulating local charge redistribution, thus realizing the rapid transformation of Ni2+→Ni3+→Ni4+. Meanwhile, the hard Lewis acid Ni4+ has strong selectivity to OH−, avoiding the competitiveness and corrosiveness of chloride ions in seawater. This work provides an effective strategy for the simple and rapid construction of self‐rebuilding high‐valence Ni4+ electrocatalysts, and is expected to provide guidance for the development of seawater electrolysis.
Article Details
Authors (9)
Huimin Mao
Key Laboratory of Eco‐Chemical Engineering International Science and Technology Cooperation Base of Eco‐Chemical Engineering and Green Manufacturing College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P.R. China
Xiaobin Liu
Department of Surgery, Translational Research Program in Pediatric Orthopedics, The Children’s Hospital of Philadelphia
Tong Cui
Junheng Tang
Key Laboratory of Eco‐Chemical Engineering International Science and Technology Cooperation Base of Eco‐Chemical Engineering and Green Manufacturing College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P.R. China
Zhi Su
Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Drum Tower Hospital, College of Chemistry and Materials Science
Jingqi Chi
Key Laboratory of Eco‐Chemical Engineering International Science and Technology Cooperation Base of Eco‐Chemical Engineering and Green Manufacturing College of Chemical Engineering Qingdao University of Science and Technology Qingdao P.R. China
Yongming Chai
Zexing Wu
Key Laboratory of Eco‐Chemical Engineering International Science and Technology Cooperation Base of Eco‐Chemical Engineering and Green Manufacturing College of Chemical Engineering Qingdao University of Science and Technology Qingdao P.R. China
Lei Wang