Citation: Longsheng Cao, Shangfeng Jiang, Geng Zhang, Xuejun Tang, Xiaoping Qin, Zhigang Shao, Baolian Yi. Fabrication of a highly dispersed Pd_core@Pt_shell electrocatalyst for the oxygen reduction reaction[J]. Chinese Journal of Catalysis, ;2017, 38(7): 1196-1206. doi: 10.1016/S1872-2067(17)62840-7 shu

Fabrication of a highly dispersed Pd_core@Pt_shell electrocatalyst for the oxygen reduction reaction

a Fuel Cell System and Engineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b University of Chinese Academy of Sciences, Beijing 100049, China;
c Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, Huibei, China

Received Date: 21 February 2017
Revised Date: 15 April 2017

Fund Project: This work was supported by the National Major Research Project (2016YFB0101208), the National Natural Science Foundation of China (21576257) and the Natural Science Foundation-Liaoning United Fund (U1508202).

Core-shell nanostructures have been widely investigated to improve the electrocatalytic perfor-mance of platinum. However, organic precursors, surfactants or high temperature are usually nec-essary during the preparation procedure. Unfortunately, these requirements limit the application of these methods on a large scale. Herein, a Pd_core@Pt_shell nanostructure was fabricated through the reduction of K₂PtCl₄ by dissociated hydrogen at room temperature without the assistance of either a surfactant or a high-boiling point solvent. The shell thickness of this nanostructure was successfully controlled by varying the amount of K₂PtCl₄; core-shell nanoparticles with a shell thickness of 0.45, 0.75 and 0.90 nm were obtained, as determined by TEM. The remarkable crystallinity and epitaxial growth of the Pd_core@Pt_shell nanostructure were revealed by HRTEM and EDS. According to ICP and XPS, surface segregation of Pt was established. The impressive ORR performance was attributed to the weak adsorption strength of the OH_ads species, which resulted from the electron transfer impact between the Pd_core and Pt_shell. The facile and clean preparation method can be used to prepare other core-shell nanostructures under a mild atmosphere.
- Pd_core@Pt_shell,
- Dissociated hydrogen,
- Oxygen reduction,
- Electrocatalysis,
- Core shell
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Fabrication of a highly dispersed Pdcore@Ptshell electrocatalyst for the oxygen reduction reaction

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通讯作者: 陈斌, bchen63@163.com

Fabrication of a highly dispersed Pd_core@Pt_shell electrocatalyst for the oxygen reduction reaction