Ordered platinum-bismuth intermetallic clusters with Pt-skin for a highly efficient electrochemical ethanol oxidation reaction

被引：58
作者：
Zhang, Bin-Wei [1 ]
Lai, Wei-Hong [1 ]
Sheng, Tian [2 ]
Qu, Xi-Ming [3 ]
Wang, Yun-Xiao [1 ]
Ren, Long [1 ]
Zhang, Lei [1 ]
Du, Yi [1 ]
Jiang, Yan-Xia [3 ]
Sun, Shi-Gang [3 ]
Dou, Shi-Xue [1 ]
机构：
[1] Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Innovat Campus,Squires Way, North Wollongong, NSW 2500, Australia
[2] Anhui Normal Univ, Coll Chem & Mat Sci, Wuhu 241000, Peoples R China
[3] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2019年 / 7卷 / 10期
基金：
澳大利亚研究理事会; 中国国家自然科学基金;
关键词：
CORE-SHELL CATALYSTS; OXYGEN REDUCTION; ELECTROCATALYTIC ACTIVITY; NANOSTRUCTURED MATERIALS; PHASE SEGREGATION; ENERGY-CONVERSION; NANOWIRE ARRAYS; ELECTROOXIDATION; PD; CARBON;
D O I：
10.1039/c8ta09553a
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 ethanol oxidation reaction is extensively explored, but electrocatalysts that could achieve a complete oxidation pathway to CO2/CO32- are much less reported. Here, we synthesize a monatomic Pt layer (Pt-skin) on ordered intermetallic PtBi clusters (PtBi@Pt) supported on graphene via a single atom self-assembling (SAS) method to form a superior catalyst. The PtBi@Pt with an ultrafine size (approximate to 2 nm) delivers an extremely high mass activity of 9.01 mA g(Pt)(-1), which is 8-fold more active than the commercial Pt/C; significantly, in situ Fourier transform infrared spectroscopy indicates that ethanol is completely oxidized to CO32- on the PtBi@Pt, accompanied by 12 electron transfer, as is further demonstrated by the density functional theory results.
引用
收藏
页码：5214 / 5220
页数：7
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