Chelating Co-reduction Strategy for the Synthesis of High-Entropy Alloy Aerogels
Abstract
Aerogels, as three-dimensional porous materials, have attracted much attention in almost every field owing to their unique structural properties. Designing high-entropy alloy aerogels (HEAAs) to quinary and above remains an enormous challenge due to the different reduction potentials and nucleation/growth kinetics of different constituent metals. Herein, a novel and universal chelating co-reduction strategy to prepare HEAAs at room temperature in the water phase is proposed. The addition of chelators (ethylenediaminetetraacetic acid tetrasodium salt, sodium citrate, salicylic acid, and 4,4'-bipyridine) with a certain strong coordination capacity can adjust the reduction potential of different metal components, which is the key to synthesize single-phase solid solution alloys successfully. The optimized AgRuPdAuPt HEAA can be an excellent electrocatalyst for hydrogen evolution reaction (HER) with an ultrasmall overpotential of 22 mV at 10 mA cm -2 and excellent stability for 24 h in an alkaline solution. In situ Raman spectroscopy unveils the enhanced hydrogen evolution reaction mechanism of HEAAs. Overall, this work provides a novel chelating co-reduction strategy for the facile and versatile synthesis and design of advanced HEAAs and broadens the development and utilization of multi-elemental alloy electrocatalysts.
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Only a limited number of HEAAs have been successfully synthesized through freeze-thaw, chelating co-reduction and liquid-phase chemical methods.
“To data, only a limited number of HEAAs have been successfully synthesized through the techniques of freeze-thaw, chelating co-reduction and liquid-phase chemical methods.[17,18,23,24]”
From Constructing Novel High‐Entropy Alloy Aerogels Platform for pH‐Universal Hydrogen Evolution Reaction with High Electrocatalytic Activity and Stability (2026) · cites this paper as [24]
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Self-citation
- Authors
- Nie, N., Zhang, Y., Gu, Y., Du, H., Yuan, Y., Yang, Y., Li, H., Yang, B., Lai, J., & Wang, L.
- Affiliations
- Qingdao University of Science and Technology (CN)
- Corresponding author
- Lai, Jianping
- Wang, Lei
- Venue
- Inorganic Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2023-07-25
- Volume
- 62
- Issue
- 31
- Pages
- 12337-12344
- ISSN
- 0020-1669 (ISSN-L)
- 1520-510X
- OpenAlex
- W4385235296
- Cited by
- 15
- References
- 40
- Citations by year
- 2026: 7 · 2025: 7 · 2024: 1
- FWCI
- 0.72
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Inorganic Chemistry (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Taishan Scholar Project of Shandong Province (tsqn201909114, tsqn201909123)
- Major Scientific and Technological Innovation Project of Shandong Province (2019JZZY020405)
- National Natural Science Foundation of China (22001143, 52072197)
- Natural Science Foundation of Shandong Province (ZR2019JQ14, ZR2020YQ34, ZR2020ZD09)
- Youth Innovation and Technology Foundation of Shandong Higher Education Institutions (2019KJC004)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Engineering › Mechanical Engineering › High Entropy Alloys Studies
- Physical Sciences › Chemistry › Spectroscopy › Aerogels and thermal insulation
- Keywords
- solid solution alloys, hydrogen evolution reaction, electrocatalysts, salicylic acid, 4,4'-bipyridine, sodium citrate, EDTA, in situ Raman spectroscopy, room-temperature synthesis
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