Carbon Monoxide as a Promoter of Atomically Dispersed Platinum Catalyst in Electrochemical Hydrogen Evolution Reaction

Kwon HC, Kim M, Grote JP, Cho SJ, Chung MW, Kim H, Won DH, Zeradjanin AR, Mayrhofer K, Choi M, Kim H, Choi CH (2018)

Publication Status: Published

Publication Type: Journal article

Publication year: 2018

Journal

Journal of the American Chemical Society American Chemical Society

Publisher: AMER CHEMICAL SOC

Book Volume: 140

Pages Range: 16198-16205

Journal Issue: 47

DOI: 10.1021/jacs.8b09211

Abstract

Carbon monoxide is widely known to poison Pt during heterogeneous catalysis owing to its strong donor-acceptor binding ability. Herein, we report a counterintuitive phenomenon of this general paradigm when the size of Pt decreases to an atomic level, namely, the CO-promoting Pt electrocatalysis toward hydrogen evolution reactions (HER). Compared to pristine atomic Pt catalyst, reduction current on a CO-modified catalyst increases significantly. Operando mass spectroscopy and electrochemical analyses demonstrate that the increased current arises due to enhanced H-2 evolution, not additional CO reduction. Through structural identification of catalytic sites and computational analysis, we conclude that CO-ligation on the atomic Pt facilitates H-ads formation via water dissociation. This counterintuitive effect exemplifies the fully distinct characteristics of atomic Pt catalysts from those of bulk Pt, and offers new insights for tuning the activity of similar classes of catalysts.

Authors with CRIS profile

Karl Mayrhofer Lehrstuhl für Elektrokatalyse (HIERN)

Involved external institutions

Korea Advanced Institute of Science and Technology (KAIST) KR Korea, Republic of (KR) Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research DE Germany (DE) Gwangju Institute of Science and Technology (GIST) / 광주과학기술원 KR Korea, Republic of (KR) Korea Institute of Science and Technology (KIST) / 한국과학기술연구원 KR Korea, Republic of (KR) Chonnam National University Hwasun Hospital KR Korea, Republic of (KR)

How to cite

APA:

Kwon, H.C., Kim, M., Grote, J.-P., Cho, S.J., Chung, M.W., Kim, H.,... Choi, C.H. (2018). Carbon Monoxide as a Promoter of Atomically Dispersed Platinum Catalyst in Electrochemical Hydrogen Evolution Reaction. Journal of the American Chemical Society, 140(47), 16198-16205. https://dx.doi.org/10.1021/jacs.8b09211

MLA:

Kwon, Han Chang, et al. "Carbon Monoxide as a Promoter of Atomically Dispersed Platinum Catalyst in Electrochemical Hydrogen Evolution Reaction." Journal of the American Chemical Society 140.47 (2018): 16198-16205.

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