Cu-Ru nanoalloys on carbon black for efficient production of hydrogen in neutral and alkaline conditions

•Uniformly dispersed CuRu alloy nanoparticles are supported on carbon black.•Improved intrinsic HER activity is obtained.•Increased site density and enhanced charge transfer are acquired.•Pt-like HER activities are achieved in both neutral and alkaline solutions. There is an increasing demand for ef...

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Bibliographic Details
Published in:Materials letters 2020-03, Vol.262, p.127041, Article 127041
Main Authors: Zhao, Jikuan, Pan, Ting, Sun, Jikang, Gao, Hongtao, Guo, Jinxue
Format: Article
Language:English
Subjects:
Carbon
Carbon black
Charge density
Charge transfer
Current density
CuRu alloy
Electrocatalysts
Energy storage and conversion
Hydrogen evolution reaction
Hydrogen evolution reactions
Hydrogen production
Materials science
Nanoalloys
Nanoparticles
Water splitting
Wide pH
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Summary:•Uniformly dispersed CuRu alloy nanoparticles are supported on carbon black.•Improved intrinsic HER activity is obtained.•Increased site density and enhanced charge transfer are acquired.•Pt-like HER activities are achieved in both neutral and alkaline solutions. There is an increasing demand for efficient electrocatalysts for hydrogen evolution reaction (HER) in neutral solution. Herein, uniformly dispersed CuRu alloy nanoparticles on carbon black (CuRu/CB) are firstly synthesized for robust HER. Based on the combined benefits of improved intrinsic activity, increased site density, and enhanced charge transfer, the as-obtained CuRu/CB exhibits Pt-like catalysis activity in both neutral and alkaline solutions, with exchange current densities of 1.02 and 1.09 mA cm−2 that are comparable to Pt/C of 1.32 and 1.44 mA cm−2, respectively. For splitting water, CuRu/CB generates the current density of 10 mA cm−2 at 91 and 85 mV in 1 M phosphate-buffered saline and 1 M KOH, respectively.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.127041