Strain Engineering to Enhance the Electrooxidation Performance of Atomic-Layer Pt on Intermetallic Pt3Ga

Feng, Quanchen1; Zhao, Shu2; He, Dongsheng3; Tian, Shubo1; Gu, Lin4; Wen, Xiaodong5; Chen, Chen1; Peng, Qing1; Wang, Dingsheng1; Li, Yadong1

2018-02-28

10.1021/jacs.7b13612

Journal of the American Chemical Society   影响因子和分区

0002-7863

Strain engineering has been a powerful strategy to finely tune the catalytic properties of materials. We report a tensile-strained two-to-three atomic-layer Pt on intermetallic Pt3Ga (AL-Pt/Pt3Ga) as an active electrocatalyst for the methanol oxidation reaction (MOR). Atomic-resolution high-angle annular dark-field scanning transmission electron microscopy characterization showed that the AL-Pt possessed a 3.2% tensile strain along the [001] direction while having a negligible strain along the [100]/[010] direction. For MOR, this tensile-strained AL-Pt electrocatalyst showed obviously higher specific activity (7.195 mA cm(-2)) and mass activity (1.094 mA/mu g(pt)) than those of its unstrained counterpart and commercial Pt/C catalysts. Density functional theory calculations demonstrated that the tensile-strained surface was more energetically favorable for MOR than the unstrained one, and the stronger binding of OH* on stretched AL-Pt enabled the easier removal of CO*.

SCI ; EI

英语

NI论文 ; ESI高被引

其他

National Natural Science Foundation of China[21521091] ; National Natural Science Foundation of China[21390393] ; National Natural Science Foundation of China[U1463202] ; National Natural Science Foundation of China[21471089] ; National Natural Science Foundation of China[21671117]

Chemistry

Chemistry, Multidisciplinary

WOS:000426617700016

AMER CHEMICAL SOC

20181004857995

Atoms ; Density functional theory ; Electrocatalysts ; Electrooxidation ; Gallium alloys ; High resolution transmission electron microscopy ; Intermetallics ; Platinum ; Scanning electron microscopy ; Transmission electron microscopy

Metallurgy:531.1 ; Precious Metals:547.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Optical Devices and Systems:741.3 ; Electrochemistry:801.4.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Mechanics:931.1 ; Atomic and Molecular Physics:931.3

Web of Science

1.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
2.Beijing Univ Technol, Beijing Guyue New Mat Res Inst, Beijing 100124, Peoples R China
3.South Univ Sci & Technol China, Mat Characterizat & Preparat Ctr, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
5.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

Feng, Quanchen,Zhao, Shu,He, Dongsheng,et al. Strain Engineering to Enhance the Electrooxidation Performance of Atomic-Layer Pt on Intermetallic Pt3Ga[J]. Journal of the American Chemical Society,2018,140(8):2773-2776.

Feng, Quanchen.,Zhao, Shu.,He, Dongsheng.,Tian, Shubo.,Gu, Lin.,...&Li, Yadong.(2018).Strain Engineering to Enhance the Electrooxidation Performance of Atomic-Layer Pt on Intermetallic Pt3Ga.Journal of the American Chemical Society,140(8),2773-2776.

Feng, Quanchen,et al."Strain Engineering to Enhance the Electrooxidation Performance of Atomic-Layer Pt on Intermetallic Pt3Ga".Journal of the American Chemical Society 140.8(2018):2773-2776.