Design of Ru-Ni diatomic sites for efficient alkaline hydrogen oxidation
學年 110
學期 2
出版（發表）日期 2022-06-01
作品名稱 Design of Ru-Ni diatomic sites for efficient alkaline hydrogen oxidation
作品名稱（其他語言）
著者 Wang, Hsiao-tsu
單位
出版者
著錄名稱、卷期、頁數 Science Advances 8(22)
摘要 Anion exchange membrane fuel cells are limited by the slow kinetics of alkaline hydrogen oxidation reaction (HOR). Here, we establish HOR catalytic activities of single-atom and diatomic sites as a function of *H and *OH binding energies to screen the optimal active sites for the HOR. As a result, the Ru-Ni diatomic one is identified as the best active center. Guided by the theoretical finding, we subsequently synthesize a catalyst with Ru-Ni diatomic sites supported on N-doped porous carbon, which exhibits excellent catalytic activity, CO tolerance, and stability for alkaline HOR and is also superior to single-site counterparts. In situ scanning electrochemical microscopy study validates the HOR activity resulting from the Ru-Ni diatomic sites. Furthermore, in situ x-ray absorption spectroscopy and computational studies unveil a synergistic interaction between Ru and Ni to promote the molecular H2 dissociation and strengthen OH adsorption at the diatomic sites, and thus enhance the kinetics of HOR.
關鍵字
語言 en
ISSN 2375-2548
期刊性質 國外
收錄於 SCI SSCI
產學合作
通訊作者
審稿制度 是
國別 TWN
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/124624 )