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Identifying Electrocatalytic Sites of the Nanoporous Copper–Ruthenium Alloy for Hydrogen Evolution Reaction in Alkaline Electrolyte
Open accessAbstract
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 Cu 53 Ru 47 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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Citations
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Cited by
Metallic nanostructures with low dimensionality for electrochemical water splitting
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Self-citationExploiting Ru‐Induced Lattice Strain in CoRu Nanoalloys for Robust Bifunctional Hydrogen Production
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Electrocatalytic Water Splitting Mechanism and Electrocatalyst Design
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Metadata
- Authors
- Wu, Q., Luo, M., Han, J., Peng, W., Zhao, Y., Chen, D., Peng, M., Liu, J., de Groot, F. M. F., & Tan, Y.
- Venue
- ACS Energy Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-12-10
- Volume
- 5
- Issue
- 1
- Pages
- 192-199
- ISSN
- 2380-8195 (ISSN-L)
- OpenAlex
- W2996133722
- Cited by
- 326
- References
- 9
- FWCI
- 7.42
- Type
- journal article
- Language
- en
- Open access
- green
- Licence
- Funders
- State Key Laboratory of Powder Metallurgy (621011813)
- Ministry of Education of the People's Republic of China
- National Natural Science Foundation of China (51771072)
- Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research (71860007)
- Youth 1000 Talent Program of China
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- The paper
- Wu, Q., Luo, M., Han, J., Peng, W., Zhao, Y., Chen, D., Peng, M., Liu, J., de Groot, F. M. F., & Tan, Y. (2020). Identifying Electrocatalytic Sites of the Nanoporous Copper–Ruthenium Alloy for Hydrogen Evolution Reaction in Alkaline Electrolyte. ACS Energy Letters. https://doi.org/10.1021/acsenergylett.9b02374
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