Highly Dispersed Platinum Chlorine Atoms Anchored on Gold Quantum Dots for a Highly Efficient Electrocatalyst

Lan Hui; Xueting Zhang; Yurui Xue; Xi Chen; Yan Fang; Chengyu Xing; Yuxin Liu; Xuchen Zheng; Yuncheng Du; Chao Zhang; Feng He; Yuliang Li

doi:10.1021/jacs.1c12310

Highly Dispersed Platinum Chlorine Atoms Anchored on Gold Quantum Dots for a Highly Efficient Electrocatalyst

J Am Chem Soc. 2022 Feb 2;144(4):1921-1928. doi: 10.1021/jacs.1c12310. Epub 2022 Jan 19.

Authors

Lan Hui^{1

2}, Xueting Zhang^{1

2}, Yurui Xue¹, Xi Chen^{1

2}, Yan Fang^{1

2}, Chengyu Xing¹, Yuxin Liu^{1

2}, Xuchen Zheng^{1

2}, Yuncheng Du¹, Chao Zhang^{1

2}, Feng He^{1

2}, Yuliang Li^{1

2}

Affiliations

¹ Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China.
² University of Chinese Academy of Sciences, Beijing 100049, P. R. China.

PMID: 35044172
DOI: 10.1021/jacs.1c12310

Abstract

The development of efficient and durable electrocatalysts is the only way to achieve commercial fuel cells. A new, efficient method was utilized for epitaxial growth of gold quantum dots using atomically platinum chlorine species with porous graphdiyne as a support (PtCl₂Au(111)/GDY), for obtaining successful multicomponent quantum dots with a size of 2.37 nm. The electrocatalyst showed a high mass activity of 175.64 A mg_Pt^-1 for methanol oxidation reactions (MORs) and 165.35 A mg_Pt^-1 for ethanol oxidation reactions (EORs). The data for this experiment are 85.67 and 246.80 times higher than those of commercial Pt/C, respectively. The catalyst also showed highly robust stability for MORs with negligible specific activity decay after 110 h at 10 mA cm^-2. Both structure characterizations and theoretical calculations reveal that the excellent catalytic performance can be ascribed to the chlorine introduced to modify the d-band structure on the Pt surface and suppression of the CO poisoning pathway of the MOR. Our results indicate that an atomically dispersed metal species tailoring strategy opens up a new path for the efficient design of highly active and stable catalysts.