Boosting the oxygen evolution reaction performance of wrinkled Mn(OH)_(2) via conductive activation with a carbon binder

作     者：Kahyun Ham Jaewon Lee Kiyoung Lee Jaeyoung Lee Kahyun Ham;Jaewon Lee;Kiyoung Lee;Jaeyoung Lee

作者机构：School of Earth Sciences and Environmental EngineeringGwangju Institute of Science and Technology(GIST)123 Cheomdangwagi-RoGwangju 61005South Korea International Future Research Center of Chemical Energy Storage and Conversion ProcessesGIST123 Cheomdangwagi-RoGwangju 61005South Korea Ertl Center for Electrochemical and CatalysisGIST123 Cheomdangwagi-RoGwangju 61005South Korea Department of Chemistry and Chemical EngineeringInha University100 Inha-RoIncheon 22212South Korea 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第8期

页      面：580-587,I0016页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National R&D Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(NRF-2021K1A4A8A01079455) supported by the Korea Institute of Energy Technology Evaluation and Planning(KETEP)granted financial resource from the Ministry of Trade,Industry&Energy,Republic of Korea(No.20213030040590) 

主　　题：Hydrogen production Oxygen evolution reaction Anion exchange membrane water electrolysis Anodization Manganese oxide 

摘      要：Electrochemical water splitting is one of the most reliable approaches for environmental-friendly hydrogen *** of their stability and abundance,Mn-based materials have been studied as electrocatalysts for the oxygen evolution reaction(OER),which is a more sluggish reaction in the water splitting *** increase the OER activity of Mn,it is imperative to facilitate the structural change of Mn oxide to the active phase with Mn_(3)+species,known as the active ***,we present the relationship between the electronic conductivity in the catalyst layer and the formation of the Mn active phase,δ-MnO_(2),from wrinkled Mn(OH)_(2).Mn(OH)_(2) has poor conductivity,and it disrupts the oxidation reaction toward MnOOH orδ-MnO_(2).Adjacent conductive carbon to Mn(OH)_(2) enabled Mn(OH)_(2) to be oxidized toδ-MnO_(2).Furthermore,after repetitive cyclic voltammetry activation,the more conductive environment resulted in a higher density ofδ-MnO_(2) through the irreversible phase transition,and thus it contributes to the improvement of the OER activity.