中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 过程工程研究所
  3. 中国科学院过程工程研究所
Understanding the hydroxyl adsorption behavior at Pt electrode surface in high-temperature alkaline solutions

文献类型：期刊论文

作者Pan, Bo2; Liu, Biao2; Wang, Shaona2; Lv, Yeqing2; Du, Hao1,2; Zhang, Yi1,2
刊名CHINESE JOURNAL OF CHEMICAL ENGINEERING
出版日期2023-02-01
卷号54页码:173-179
ISSN号1004-9541
关键词Alkaline solution Hydroxyl adsorption Cationic species High temperature Cationic hydrated clusters
DOI10.1016/j.cjche.2022.04.012
英文摘要Since the application in fuel cell, the electrochemical adsorption of hydroxyl has received considerable attention in recent years. While most research mainly focus on the room temperature, in this paper, the electrochemical adsorption of hydroxyl in alkaline solution at high temperature was investigated. An unusual oxidation peak was observed at -0.27 V, suggesting new behavior of hydroxyl adsorption occurred. As is known two kinds of cation hydrated clusters exist in alkaline solution, (H2O)X-1M'-H2O-OadH and (H2O)XM'-OadH. For K' and Cs', the cluster shows unstable structure due to the weak interaction between hydrated cation and OH- especially at high temperature. However, For Li', Na' the cluster structure would be stable, as the interaction force between the hydrated cation and OH- is so strong. It was revealed that the unusual oxidation peak has some relationship with the (H2O)X-1M'-H2O-OadH cluster (K' and Cs') absorbed at Pt electrode surface. When the temperature was raised, (H2O)X-1M'-H2O- and -OadH was disconnected, then the OadH absorbed at Pt surface got oxidated. Based on the SEM observation, it was showed the unusual electrochemical oxidation reaction would generate platinum oxides, blocking the reactive sites at Pt electrode surface, thus reducing the electrochemical reactivity of Pt electrode. Accordingly, parameters of alkaline concentration and temperature were systematically studied, it was found that increase temperature or alkaline concentration was in favor of the unusual oxidation reaction. This study provides more understanding of hydroxyl adsorption behavior at Pt electrode surface for the high temperature water solution environment. (c) 2022 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
WOS关键词OXYGEN REDUCTION ; WATER ELECTROLYSIS ; OXIDATION ; CARBON ; PLATINUM ; ELECTROCATALYSTS ; ACTIVATION ; DEPOSITION ; KINETICS ; COATINGS
资助项目National Key Research and Development Program of China[2020YFC1909703] ; S&T Program of Hebei Province[21284402Z] ; Fangchenggang Key Research and Development[AB20014008] ; Lvliang Key Research and Development Program[2020GXZDYF7]
WOS研究方向Engineering
语种英语
出版者CHEMICAL INDUSTRY PRESS CO LTD
WOS记录号WOS:000925309900001
资助机构National Key Research and Development Program of China ; S&T Program of Hebei Province ; Fangchenggang Key Research and Development ; Lvliang Key Research and Development Program
源URL[http://ir.ipe.ac.cn/handle/122111/57011]  
通讯作者Du, Hao
作者单位1.Univ Chinese Acad Sci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Pan, Bo,Liu, Biao,Wang, Shaona,et al. Understanding the hydroxyl adsorption behavior at Pt electrode surface in high-temperature alkaline solutions[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2023,54:173-179.
APA Pan, Bo,Liu, Biao,Wang, Shaona,Lv, Yeqing,Du, Hao,&Zhang, Yi.(2023).Understanding the hydroxyl adsorption behavior at Pt electrode surface in high-temperature alkaline solutions.CHINESE JOURNAL OF CHEMICAL ENGINEERING,54,173-179.
MLA Pan, Bo,et al."Understanding the hydroxyl adsorption behavior at Pt electrode surface in high-temperature alkaline solutions".CHINESE JOURNAL OF CHEMICAL ENGINEERING 54(2023):173-179.

入库方式： OAI收割

来源：过程工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。