PtCuFe alloy nanochains: Synthesis and composition-performance relationship in methanol oxidation and hydrogen evolution reactions

被引：61

作者：

Fan, Fangfang ^{[1
]}

Chen, Du -Hong ^{[1
]}

Yang, Linjuan ^{[1
]}

Qi, Jiuhui ^{[1
]}

Fan, Youjun ^{[1
]}

Wang, Yixuan ^{[2
]}

Chen, Wei ^{[1
]}

机构：

[1] Guangxi Normal Univ, Sch Chem & Pharmaceut Sci, Guangxi Key Lab Low Carbon Energy Mat, Guilin 541004, Peoples R China

[2] Albany State Univ, Dept Chem & Forens Sci, Albany, GA 31705 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 628卷

基金：

中国国家自然科学基金;

关键词：

PtCuFe alloy; Nanochain; Electrocatalysis; Methanol oxidation reaction; Hydrogen evolution reaction; RHOMBIC DODECAHEDRAL NANOFRAMES; OXYGEN REDUCTION REACTION; HIGHLY EFFICIENT; ELECTROCATALYTIC ACTIVITIES; CARBON NANOTUBES; CATALYSTS; ELECTROOXIDATION; NANOWIRES; GRAPHENE; STRATEGY;

D O I：

10.1016/j.jcis.2022.08.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The controllable synthesis of 1-dimensional (1D) multi-metal Pt-based alloys, with enhanced electro-chemical properties remains a challenge, despite the wide application of Pt-based catalysts in fuel cells and in the hydrogen evolution reaction (HER). Herein, we fabricate PtCuFe alloy nanochains (NCs) that have a tunable composition by flexibly adjusting the molar ratios of the metal precursors. It was found that Cu2+ is key in the formation of 1D NCs, as confirmed by transmission electron microscopy character-izations. In addition, the alloyed Fe can further increase the content of the metallic state of Cu in the PtCuFe NCs. The as-prepared PtCuFe NCs exhibited higher catalytic activity and stability than those of the Pt nanoparticles (NPs), PtFe NPs, and PtCu NCs, for the methanol oxidation reaction (MOR) and HER. Additionally, the composition-performance relationship of PtCuxFey NCs toward the MOR and HER were investigated. The hybrid density functional theory calculation and analysis showed that the 1D PtCuFe NCs have a lower lowest unoccupied molecular orbital (LUMO) than those of the 2-and 3 -dimensional PtCuFe, verifying that the 1D PtCuFe NCs exhibit the highest activity for the MOR. This work has established a new method for the controllable synthesis of multi-metal Pt-based NCs/alloy catalysts and their subsequent applications in other electro-catalytic reactions.(c) 2022 Elsevier Inc. All rights reserved.

引用

页码：153 / 161

页数：9

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