In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2016-02, No. 40 ( 2016-09-01), p. 3045-3045
Abstract:
CO 2 has been one of the problematic greenhouse gases, and there have been a lot of efforts to reduce it through capturing, storage, and conversion [1,2]. Ultimately, CO 2 needs to be reduced to high energy state fuels including CO. However, CO 2 is stable molecule and requires high potential for electrochemical reduction process. Also, hydrogen evolution reaction (HER) occurs at similar potential, thus a selective catalytic reduction is essentially required for electrochemical reduction of CO 2 to fuels, in this case CO [3]. So far, Au and Ag catalysts have been studied extensively as candidate catalysts for CO production [4] . Even though Au has provided slightly higher activity, Ag is continuously suggested as a reliable candidate with cost effectiveness. In this work, we developed AgIn catalysts through co-deposition method. It has been known to have large overpotential to HER, which will improve the selectivity of Ag in production of CO over H 2 . The co-electrodeposition was done through controlling the ratio of amounts of In and Ag precursors in the deposition bath. The fabricated catalysts were analyzed through FE-SEM for surface analysis, EDS to find out Ag and In composition, and XRD to identify the crystal structure and degree of alloy. Also, chronoamperometry (CA) was used to measure and calculate CO 2 reduction efficiency using home-made H type cell. Gas chromatography (GC) was used to analyze produced amounts of CO. The results showed that AgIn catalysts was deposited in dendritic morphology and showed much better CO faradaic efficiency than Ag only catalysts. Reference 1. Lu, Q.; Rosen, J.; Zhou, Y.; Hutchings, G. S.; Kimmel, Y. C.; Chen, J. G.; Jiao, F. Nat Commun 2014 , 5 . 2. Rosen, J.; Hutchings, G. S.; Lu, Q.; Rivera, S.; Zhou, Y.; Vlachos, D. G.; Jiao, F. ACS Catalysis 2015 , 5 , 4293. 3. Hall, A. S.; Yoon, Y.; Wuttig, A.; Surendranath, Y. Journal of the American Chemical Society 2015 , 137 , 14834. 4. Zhou, L. Q.; Ling, C.; Jones, M.; Jia, H. Chemical Communications 2015 , 51 , 17704.
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2016-02/40/3045
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2016
detail.hit.zdb_id:
2438749-6
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