Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 3, Pages 796-800Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201610432
Keywords
CO2 reduction; electrocatalysis; energy conversion; nanoelectrodes
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Funding
- Global Frontier R&D Program - National Research Foundation [2012M3A6A7054855]
- Korea CCS R&D Center (Korea CCS Project) grant - Ministry of Science, ICT & Future Planning [2016M1A8A1925427]
- KIST Institutional Program [2E00000]
- Basic Science Research Program through the National Research Foundation [2014R1A1A2058607]
- National Research Foundation [2016R1A1A1A05005032]
- BK21+ program of Creative Research Engineer Development IT, Seoul National University
- National Research Foundation of Korea [2016R1A6A3A11930759]
- National Research Foundation of Korea [2014R1A1A2058607, 2016R1A1A1A05005032, 2016R1A6A3A11930759] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The electrocatalytic conversion of CO2 to value-added hydrocarbons is receiving significant attention as a promising way to close the broken carbon-cycle. While most metal catalysts produce C-1 species, such as carbon monoxide and formate, the production of various hydrocarbons and alcohols comprising more than two carbons has been achieved using copper (Cu)-based catalysts only. Methods for producing specific C-2 reduction outcomes with high selectivity, however, are not available thus far. Herein, the morphological effect of a Cu mesopore electrode on the selective production of C-2 products, ethylene or ethane, is presented. Cu mesopore electrodes with precisely controlled pore widths and depths were prepared by using a thermal deposition process on anodized aluminum oxide. With this simple synthesis method, we demonstrated that C-2 chemical selectivity can be tuned by systematically altering the morphology. Supported by computational simulations, we proved that nanomorphology can change the local pH and, additionally, retention time of key intermediates by confining the chemicals inside the pores.
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