Identifying Electrocatalytic Sites of the Nanoporous Copper-Ruthenium Alloy for Hydrogen Evolution Reaction in Alkaline Electrolyte

Qiuli Wu; Min Luo; Jiuhui Han; Wei Peng; Yang Zhao; Dechao Chen; Ming Peng; Ji Liu; Frank M.F. De Groot; Yongwen Tan

doi:10.1021/acsenergylett.9b02374

Identifying Electrocatalytic Sites of the Nanoporous Copper-Ruthenium Alloy for Hydrogen Evolution Reaction in Alkaline Electrolyte

Qiuli Wu, Min Luo, Jiuhui Han, Wei Peng, Yang Zhao, Dechao Chen, Ming Peng, Ji Liu, Frank M.F. De Groot, Yongwen Tan^*

^*Corresponding author for this work

Sub Inorganic Chemistry and Catalysis

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Hydrogen production from electrochemical water splitting is a promising route to pursue clean and sustainable energy sources. Here, a three-dimensional nanoporous Cu-Ru alloy is prepared as a high-performance platinum-free catalyst for hydrogen evolution reaction (HER) by a dealloying process. Significantly, the optimized nanoporous alloy Cu₅₃Ru₄₇ exhibits remarkable catalytic activity for HER with nearly zero onset overpotential and ultralow Tafel slopes (∼30 and ∼35 mV dec^-1) in both alkaline and neutral electrolytes, achieving a catalytic current density of 10 mA cm^-2 at low overpotentials of ∼15 and ∼41 mV, respectively. Operando X-ray absorption spectroscopy experiments, in conjunction with DFT simulations, reveal that the incorporation of Ru atoms into the Cu matrix not only accelerates the reaction step rates of water adsorption and activation but also optimizes the hydrogen bonding energy on Cu and Ru active sites, improving the intrinsic activity for HER.

Original language	English
Pages (from-to)	192-199
Number of pages	8
Journal	ACS Energy Letters
Volume	5
Issue number	1
DOIs	https://doi.org/10.1021/acsenergylett.9b02374
Publication status	Published - 10 Jan 2020

Funding

This work was financially supported by the National Natural Science Foundation of China (No. 51771072), the Youth 1000 Talent Program of China, the Fundamental Research Funds for the Central Universities, Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project (No. 71860007), and the State Key Laboratory of Powder Metallurgy, Central South University (No. 621011813).

Keywords

X-ray absorption near edge spectroscopy
Alloys
Porosity
Catalysts
Evolution reactions

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsenergylett.9b02374

acsenergylett.9b02374Final published version, 5.82 MB

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title = "Identifying Electrocatalytic Sites of the Nanoporous Copper-Ruthenium Alloy for Hydrogen Evolution Reaction in Alkaline Electrolyte",

abstract = "Hydrogen production from electrochemical water splitting is a promising route to pursue clean and sustainable energy sources. Here, a three-dimensional nanoporous Cu-Ru alloy is prepared as a high-performance platinum-free catalyst for hydrogen evolution reaction (HER) by a dealloying process. Significantly, the optimized nanoporous alloy Cu53Ru47 exhibits remarkable catalytic activity for HER with nearly zero onset overpotential and ultralow Tafel slopes (∼30 and ∼35 mV dec-1) in both alkaline and neutral electrolytes, achieving a catalytic current density of 10 mA cm-2 at low overpotentials of ∼15 and ∼41 mV, respectively. Operando X-ray absorption spectroscopy experiments, in conjunction with DFT simulations, reveal that the incorporation of Ru atoms into the Cu matrix not only accelerates the reaction step rates of water adsorption and activation but also optimizes the hydrogen bonding energy on Cu and Ru active sites, improving the intrinsic activity for HER.",

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author = "Qiuli Wu and Min Luo and Jiuhui Han and Wei Peng and Yang Zhao and Dechao Chen and Ming Peng and Ji Liu and {De Groot}, {Frank M.F.} and Yongwen Tan",

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AU - Wu, Qiuli

AU - Luo, Min

AU - Han, Jiuhui

AU - Peng, Wei

AU - Zhao, Yang

AU - Chen, Dechao

AU - Peng, Ming

AU - Liu, Ji

AU - De Groot, Frank M.F.

AU - Tan, Yongwen

PY - 2020/1/10

Y1 - 2020/1/10

N2 - Hydrogen production from electrochemical water splitting is a promising route to pursue clean and sustainable energy sources. Here, a three-dimensional nanoporous Cu-Ru alloy is prepared as a high-performance platinum-free catalyst for hydrogen evolution reaction (HER) by a dealloying process. Significantly, the optimized nanoporous alloy Cu53Ru47 exhibits remarkable catalytic activity for HER with nearly zero onset overpotential and ultralow Tafel slopes (∼30 and ∼35 mV dec-1) in both alkaline and neutral electrolytes, achieving a catalytic current density of 10 mA cm-2 at low overpotentials of ∼15 and ∼41 mV, respectively. Operando X-ray absorption spectroscopy experiments, in conjunction with DFT simulations, reveal that the incorporation of Ru atoms into the Cu matrix not only accelerates the reaction step rates of water adsorption and activation but also optimizes the hydrogen bonding energy on Cu and Ru active sites, improving the intrinsic activity for HER.

AB - Hydrogen production from electrochemical water splitting is a promising route to pursue clean and sustainable energy sources. Here, a three-dimensional nanoporous Cu-Ru alloy is prepared as a high-performance platinum-free catalyst for hydrogen evolution reaction (HER) by a dealloying process. Significantly, the optimized nanoporous alloy Cu53Ru47 exhibits remarkable catalytic activity for HER with nearly zero onset overpotential and ultralow Tafel slopes (∼30 and ∼35 mV dec-1) in both alkaline and neutral electrolytes, achieving a catalytic current density of 10 mA cm-2 at low overpotentials of ∼15 and ∼41 mV, respectively. Operando X-ray absorption spectroscopy experiments, in conjunction with DFT simulations, reveal that the incorporation of Ru atoms into the Cu matrix not only accelerates the reaction step rates of water adsorption and activation but also optimizes the hydrogen bonding energy on Cu and Ru active sites, improving the intrinsic activity for HER.

KW - X-ray absorption near edge spectroscopy

KW - Alloys

KW - Porosity

KW - Catalysts

KW - Evolution reactions

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Identifying Electrocatalytic Sites of the Nanoporous Copper-Ruthenium Alloy for Hydrogen Evolution Reaction in Alkaline Electrolyte

Abstract

Funding

Keywords

UN SDGs

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