期刊
CHEMSUSCHEM
卷 12, 期 2, 页码 511-517出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201802287
关键词
alloys; CO2 reduction; electrocatalysis; electrolysis; syngas
资金
- Le Corps des Ponts, des Eaux et des Forthornts
- CNRS-Cellule Energie
- Fondation of College de France
- Idex PSL [ANR-10-IDEX-001-02 PSLstar]
- Sorbonne Universite, CNRS
- C'Nano projects of the Region Ile-de-France
Alloying strategies are commonly used to design electrocatalysts that take on properties of their constituent elements. Herein, such a strategy is used to develop Zn-Cu alloyed electrodes with unique hierarchical porosity and tunable selectivity for CO2 versus H+ reduction. By varying the Zn/Cu ratio, tailored syngas mixtures are obtained without the production of other gaseous products, which is attributed to preferential CO- and H-2-forming pathways on the alloys. The syngas ratios are also significantly less sensitive to the applied potential in the alloys relative to pure metal equivalents; an essential quality when coupling electrocatalysis with renewable power sources that have fluctuating intensity. As such, industrially relevant syngas ratios are achieved at large currents (-60 mA) for extensive operating times (> 9 h), demonstrating the potential of this strategy for fossil-free fuel production.
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