Ultrathin carbon layer stabilized metal catalysts towards oxygen reduction

被引：54

作者：

Cheng, Kun ^{[1
]}

Kou, Zongkui ^{[1
]}

Zhang, Jian ^{[1
]}

Jiang, Min ^{[1
]}

Wu, Hui ^{[1
]}

Hu, Lin ^{[1
]}

Yang, Xiaoyu ^{[1
]}

Pan, Mu ^{[1
]}

Mu, Shichun ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 26期

基金：

中国国家自然科学基金;

关键词：

SUPPORTED PLATINUM CATALYSTS; PT-BASED CATALYSTS; PEM FUEL-CELL; PHOSPHORIC-ACID; PERFLUOROSULFONIC ACID; METHANOL OXIDATION; ENHANCED STABILITY; CO TOLERANCE; NANOPARTICLES; SURFACE;

D O I：

10.1039/c5ta02386f

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：

A novel ultrathin carbon layer (UTCL) stabilized Pt catalyst (Pt-UTCL/C) with an open framework is synthesized to significantly enhance the stability of the catalyst in proton exchange membrane fuel cells. Herein, a cheap and widely available polymer, soluble starch (SS), as a precursor, is employed to wrap Pt nanoparticles (NPs) and is then carbonized into a UTCL with a thickness of few molecular-layers (0.58 nm on average) at a mild temperature. Significantly, it possesses extremely high stabilities of both electrochemical surface area and ORR compared to the commercial Pt/C catalyst even after 10 000 potential cycles. Such excellent stability can be ascribed to the anchoring effect of the UTCL towards Pt NPs to the inhibited migration, agglomeration and detachment of Pt NPs from the supports as well as to the possibly mitigated dissolution-growth process of Pt NPs in light of the UTCL.

引用

页码：14007 / 14014

页数：8

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