Controlling the oxidation state of Cu electrode and reaction intermediates for electrochemical CO2 reduction to ethylene
學年 108
學期 1
出版（發表）日期 2020-01-20
作品名稱 Controlling the oxidation state of Cu electrode and reaction intermediates for electrochemical CO2 reduction to ethylene
作品名稱（其他語言）
著者 Tsu-Chin Chou; Chiao-Chun Chang; Hung-Ling Yu; Wen-Yueh Yu; Chung-Li Dong; Juan-Jesús Velasco-Vélez; Cheng-Hao Chuang; Li-Chyong Chen; Jyh-Fu Lee; Jin-Ming Chen; Heng-Liang Wu
單位
出版者
著錄名稱、卷期、頁數 Journal of the American Chemical Society 142, p.2857-2867
摘要 Understanding the role of the oxidation state of the Cu surface and surface-adsorbed intermediate species in electrochemical CO2 reduction is crucial for the development of selective CO2-to-fuel electrocatalysts. In this study, the electrochemical CO2 reduction mechanism over the Cu catalysts with various oxidation states was studied by using in situ surface-enhanced infrared absorption spectroscopy (SEIRAS), in situ soft X-ray absorption spectroscopy (Cu L-edge), and online gas chromatography measurements. The atop-adsorbed CO (COatop) intermediate is obtained on the electrodeposited Cu surface which primarily has the oxidation state of Cu(I). COatop is further reduced, followed by the formation of C1 product such as CH4. The residual bridge-adsorbed CO (CObridge) is formed on the as-prepared Cu surface with Cu(0) which inhibits hydrocarbon formation. In contrast, the CV-treated Cu electrode prepared by oxidizing the as-prepared Cu surface contains different amounts of Cu(I) and Cu(0) states. The major theme of this work is that in situ SEIRAS results show the coexistence of COatop and CObridge as the reaction intermediates during CO2 reduction and that the selectivity of CO2-to-ethylene conversion is further enhanced in the CV-treated Cu electrode. The Cu catalysts modulated by the electrochemical method exhibit different oxidation states and reaction intermediates as well as electrocatalytic properties.
關鍵字
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 USA
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/987654321/120697 )

SDGS 氣候行動,可負擔的潔淨能源