Exploiting Ru‐Induced Lattice Strain in CoRu Nanoalloys for Robust Bifunctional Hydrogen Production
Open accessAbstract
Designing bifunctional catalysts capable of driving the electrochemical hydrogen evolution reaction (HER) and also H 2 evolution via the hydrolysis of hydrogen storage materials such as ammonia borane (AB) is of considerable practical importance for future hydrogen economies. Herein, we systematically examined the effect of tensile lattice strain in CoRu nanoalloys supported on carbon quantum dots (CoRu/CQDs) on hydrogen generation by HER and AB hydrolysis. By varying the Ru content, the lattice parameters and Ru‐induced lattice strain in the CoRu nanoalloys could be tuned. The CoRu 0.5 /CQDs catalyst with an ultra‐low Ru content (1.33 wt.%) exhibited excellent catalytic activity for HER ( η =18 mV at 10 mA cm −2 in 1 M KOH) and extraordinary activity for the hydrolysis of AB with a turnover frequency of 3255.4 mol mol −1 (Ru) min −1 or 814.7 mol mol −1 (cat) min −1 at 298 K, respectively, representing one of the best activities yet reported for AB hydrolysis over a ruthenium alloy catalyst. Moreover, the CoRu 0.5 /CQDs catalyst displayed excellent stability during each reaction, including seven alternating cycles of HER and AB hydrolysis. Theoretical calculations revealed that the remarkable catalytic performance of CoRu 0.5 /CQDs resulted from the optimal alloy electronic structure realized by incorporating small amounts of Ru, which enabled fast interfacial electron transfer to intermediates, thus benefitting H 2 evolution kinetics. Results support the development of new and improved catalysts HER and AB hydrolysis.
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Ruthenium has emerged as an attractive candidate for HER largely because of a moderate Ru-H bond strength analogous to Pt-H, which is conducive to facile HER kinetics.
“ruthenium (Ru) has emerged as an attractive candidate, largely because of a moderate strength of the ruthenium-hydrogen (Ru-H) bond that is analogous to that of Pt-H, which is conducive to facile HER kinetics [9–18]”
From Atomically dispersed ruthenium in carbon aerogels as effective catalysts for pH-universal hydrogen evolution reaction (2022) · cites this paper as [13]
The Introduction calls Ru a promising HER electrocatalyst in alkaline media, but attributes this to fast water dissociation—not a moderate Ru–H bond. It says Ru–H interactions are usually too strong and that overbinding hinders hydrogen desorption, contrary to the claimed explanation for facile HER kinetics. The cited passages provide no Pt–H bond-strength analogy. (LLM, conf=0.88)
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High-entropy alloys in electrocatalysis: from fundamentals to applications
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- Authors
- Li, W., Zhao, Y., Liu, Y., Sun, M., Waterhouse, G. I. N., Huang, B., Zhang, K., Zhang, T., & Lu, S.
- Affiliations
- Zhengzhou University (CN)
- Chinese Academy of Sciences (CN)
- Hong Kong Polytechnic University (HK)
- University of Auckland (NZ)
- Nanjing University of Science and Technology (CN)
- Corresponding author
- Huang, Bolong
- Lu, Siyu
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2020-12-08
- Volume
- 60
- Issue
- 6
- Pages
- 3290-3298
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W3094409766
- Cited by
- 422
- References
- 1
- Citations by year
- 2026: 27 · 2025: 59 · 2024: 91 · 2023: 63 · 2022: 109 · 2021: 71 · 2020: 2
- FWCI
- 12.11
- Type
- journal article
- Language
- en
- Update notices
- correction (2023-08-30)
- Open access
- green
- hdl.handle.net
- Locations
- Angewandte Chemie International Edition (publishedVersion)
- PubMed (publishedVersion)
- PolyU Institutional Research Archive (Hong Kong Polytechnic University) (submittedVersion)
- Funders
- Postdoctoral Research Foundation of China (2018M640681, 2019T120632)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Hydrogen Storage and Materials
- Physical Sciences › Chemical Engineering › Catalysis › Ammonia Synthesis and Nitrogen Reduction
- Keywords
- electrocatalytic hydrogen evolution, ammonia borane hydrolysis, hydrogen storage materials, carbon quantum dots, catalyst stability, interfacial electron transfer, alloy electronic structure, hydrogen evolution kinetics
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