Organic-inorganic hybrid interfaces with π-d electron coupling for preventing metal and sulfur leaching toward enhanced oxygen evolution reaction

Yang Liu; Kun Wang; Lei Jin; Yahan Li; Guanyu Chen; Hui Xu; Jie Chen; Guangyu He

doi:10.1016/j.jcis.2024.05.099

Organic-inorganic hybrid interfaces with π-d electron coupling for preventing metal and sulfur leaching toward enhanced oxygen evolution reaction

J Colloid Interface Sci. 2024 Sep 15:670:288-296. doi: 10.1016/j.jcis.2024.05.099. Epub 2024 May 15.

Authors

Yang Liu¹, Kun Wang¹, Lei Jin¹, Yahan Li¹, Guanyu Chen¹, Hui Xu², Jie Chen¹, Guangyu He³

Affiliations

¹ Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, Jiangsu Province 213164, China.
² Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, Jiangsu Province 213164, China. Electronic address: xuhui006@cczu.edu.cn.
³ Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, Jiangsu Province 213164, China. Electronic address: hegy@cczu.edu.cn.

PMID: 38763025
DOI: 10.1016/j.jcis.2024.05.099

Abstract

Transition metal sulfides (TMSs) catalysts with high catalytic oxygen evolution reaction (OER) activity have been extensively studied, especially Fe and Co-based sulfides. Fe and Co active sites with a strong synergistic effect, which can adjust the electron density distribution and effectively improve the electrocatalytic OER activity. However, TMSs have poor stability in alkaline environment caused by metal ions and sulfur elements are facilitated to dissolve. In this work, TMSs was modified by polyaniline (PANI) to inhibit the precipitation of iron, cobalt, and sulfur elements and enhance its stability under alkaline conditions. Moreover, π-d structure can also be formed by the coating of PANI, which can further adjust its own electronic structure on the basis of stabilizing the TMSs structure, so as to improve the electrochemical performance, rendering them to stably operate at harsh environment for more than 90 h. These findings offer new guidance for improving the electrocatalytic stability of TMSs.

Keywords: Interface; Leaching; Organic-inorganic hybrid; PANI; π-d electron coupling.