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Optimization of Pt–Oxygen-Containing Species Anodes for Ethanol Oxidation Reaction: High Performance of Pt-AuSnOx Electrocatalyst
journal contribution
posted on 2020-03-27, 19:19 authored by Sheng Dai, Tzu-Hsi Huang, Po-Cheng Chien, Cheng-An Lin, Chen-Wei Liu, Sheng-Wei Lee, Jeng-Han Wang, Kuan-Wen Wang, Xiaoqing PanPt–oxygen-containing
species (Pt-OCS) catalysts, in which
OCS (e.g., metal-oxides) are decorated on a Pt surface, possess enhanced
ethanol oxidation reaction (EOR) activity and stability compared with
pure Pt and are promising in practical applications of direct ethanol
fuel cells. We investigate the promotion roles of Pt-OCS electrocatalysts
toward the EOR via a combination of density functional theory (DFT)
calculations and experiments, providing a rational design strategy
for Pt-OCS catalysts. It is revealed that Pt-AuO and Pt-SnO excel
in EOR activity and stability, respectively, among the DFT screening
of various Pt-OCS systems, and this is confirmed by the following
experiments. Moreover, an optimized Pt-AuSnO catalyst is proposed
by DFT calculations, taking advantage of both Pt-AuO and Pt-SnO. The
as-prepared Pt-AuSnO catalyst delivers an EOR activity that is 9.7
times higher than that of Pt and shows desired stability. These findings
are expected to elucidate the mechanistic insights into Pt-OCS materials
and lead to advanced EOR electrocatalysts.