CO2 Reduction on Cu at Low Overpotentials with Surface-Enhanced in Situ Spectroscopy
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- 作者：Jeffrey Heyes ; Marco Dunwell ; Bingjun Xu
- 刊名：Journal of Physical Chemistry C
- 出版年：2016
- 出版时间：August 11, 2016
- 年：2016
- 卷：120
- 期：31
- 页码：17334-17341
- 全文大小：556K
- 年卷期：0
- ISSN：1932-7455
文摘
In situ surface-enhanced spectroscopic and reactivity investigations of the electrochemical reduction of CO2 at low overpotentials (<0.7 V) was conducted on Cu surfaces. Vibrational bands corresponding to adsorbed hydrogen (Had) and carbon monoxide (COad) on Cu have been identified at 2090 and 2060 cm–1, respectively. Spectroscopic investigations show that Had is capable of partially displacing COad; however, COad is unable to displace Had to any detectable level. The preferential adsorption of H over CO on Cu is consistent with the high selectivity toward the hydrogen evolution reaction at potentials >−0.8 V versus reversible hydrogen electrode.