Mesoporous Pd@Ru Core-Shell Nanorods for Hydrogen Evolution Reaction in Alkaline Solution

Yiqi Luo; Xuan Luo; Geng Wu; Zhijun Li; Guanzhong Wang; Bin Jiang; Yanmin Hu; Tingting Chao; Huanxin Ju; Junfa Zhu; Zhongbin Zhuang; Yuen Wu; Xun Hong; Yadong Li

doi:10.1021/acsami.8b09988

Mesoporous Pd@Ru Core-Shell Nanorods for Hydrogen Evolution Reaction in Alkaline Solution

ACS Appl Mater Interfaces. 2018 Oct 10;10(40):34147-34152. doi: 10.1021/acsami.8b09988. Epub 2018 Sep 26.

Authors

Yiqi Luo, Xuan Luo, Geng Wu, Zhijun Li, Guanzhong Wang, Bin Jiang, Yanmin Hu, Tingting Chao, Huanxin Ju¹, Junfa Zhu¹, Zhongbin Zhuang², Yuen Wu, Xun Hong, Yadong Li³

Affiliations

¹ National Synchrotron Radiation Laboratory (NSRL) , University of Science and Technology of China , Hefei , Anhui 230029 , China.
² State Key Lab of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing 100029 , China.
³ Department of Chemistry , Tsinghua University , Beijing 100084 , China.

PMID: 30211535
DOI: 10.1021/acsami.8b09988

Abstract

The activity and stability of bimetallic nanocatalysts strongly depend on their structures, compositions, and interfaces. Here, we report the synthesis of mesoporous Pd@Ru core-shell bimetallic nanorods composed of face-centered cubic Pd and hexagonal close-packed Ru. The nanorods have two types of cavities with diameters of 3.0 ± 0.9 and 20.3 ± 8.1 nm. The mutual diffusion process between Ru and Pd is characterized by the high-angle annular dark-field scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy mapping, and the synchrotron radiation photoemission spectroscopy measurements. The mesoporous Pd@Ru nanorods exhibit superior catalytic performance and stability for hydrogen evolution reactions (overpotentials of 30 mV at 10 mA·cm^-2 in 1.0 M KOH solution and 37 mV at 10 mA·cm^-2 in 0.5 M H₂SO₄ solution).

Keywords: core−shell; electrocatalysis; element diffusion; mesoporous; ruthenium.