Cu-Pd alloy nanoparticles as highly selective catalysts for efficient electrochemical reduction of CO2 to CO
SCIE
SCOPUS
- Title
- Cu-Pd alloy nanoparticles as highly selective catalysts for efficient electrochemical reduction of CO2 to CO
- Authors
- MUN, YEONGDONG; LEE, SEUNGHYUN; CHO, ARA; KIM, SEONGBEEN; HAN, JEONG WOO; LEE, JINWOO
- Date Issued
- 2019-06
- Publisher
- Elsevier BV
- Abstract
- Although a copper catalyst has very interesting properties in CO2 electroreduction reaction (CO2RR), the high overpotential of this reaction and low selectivity of the catalyst for a single product are major hindrances to catalyst commercialization. In this work, monodisperse Cu-Pd nanoparticles (NPs) with various compositions are synthesized using the colloidal method. These NPs show a totally different catalytic performance than bulk Cu catalysts. Alloying Cu with Pd suppresses hydrocarbon production on the alloy NP catalyst surface. NPs with a 1:1 Cu -Pd ratio show the best catalytic activity for the conversion of CO2 to CO. At -0.9 V (vs. RHE), 87% CO Faradaic efficiency is achieved, as well as a high noble metal mass activity of 47 mA mg(Pd)(-1), for CO production. Density functional theory calculations suggest that the energy barrier to the CO* protonation step is increased when Pd is alloyed with Cu; this increase suppresses the reduction of CO2 to hydrocarbons. This result is a significant advance toward selective electrochemical reduction of CO2.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/94655
- DOI
- 10.1016/j.apcatb.2019.01.021
- ISSN
- 0926-3373
- Article Type
- Article
- Citation
- Applied Catalysis B: Environmental, vol. 246, page. 82 - 88, 2019-06
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