Kwon, Han Chang Kim, Minho Grote, Jan-Philipp Cho, Sung June Chung, Min Wook Kim, Haesol Won, Da Hye Zeradjanin, Aleksandar R. Mayrhofer, Karl J. J. Choi, Minkee Kim, Hyungjun Choi, Chang Hyuck 2024-01-19T21:30:37Z 2024-01-19T21:30:37Z 2021-09-04 2018-11-28 0002-7863 https://pubs.kist.re.kr/handle/201004/120665 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. English AMER CHEMICAL SOC OXYGEN REDUCTION REACTION COVALENT TRIAZINE FRAMEWORKS DENSITY-FUNCTIONAL THEORY METHANOL ELECTROOXIDATION SINGLE-ATOM OXIDATION ELECTROCATALYSIS CO NANOPARTICLES ELECTRODES Carbon Monoxide as a Promoter of Atomically Dispersed Platinum Catalyst in Electrochemical Hydrogen Evolution Reaction Article 10.1021/jacs.8b09211 1 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.140, no.47, pp.16198 - 16205 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 140 47 16198 16205 scie scopus 000451933100030 2-s2.0-85056752869 Chemistry, Multidisciplinary Chemistry Article OXYGEN REDUCTION REACTION COVALENT TRIAZINE FRAMEWORKS DENSITY-FUNCTIONAL THEORY METHANOL ELECTROOXIDATION SINGLE-ATOM OXIDATION ELECTROCATALYSIS CO NANOPARTICLES ELECTRODES Hydrogen evolution reaction Platinum single atom