Highly efficient biomass upgrading by a Ni-Cu electrocatalyst featuring passivation of water oxidation activity
Abstract
Electricity-driven organo-oxidations have shown an increasing potential recently. However, oxygen evolution reaction (OER) is the primary competitive reaction, especially under high current densities, which leads to low Faradaic efficiency (FE) of the product and catalyst detachment from the electrode. Here, we report a bimetallic Ni-Cu electrocatalyst supported on Ni foam (Ni-Cu/NF) to passivate the OER process while the oxidation of 5-hydroxymethylfurfural (HMF) is significantly enhanced. A current density of 1000 mA cm -2 can be achieved at 1.50 V vs. reversible hydrogen electrode, and both FE and yield keep close to 100 % over a wide range of potentials. Both experimental results and theoretical calculations reveal that Cu doping impedes the OH* deprotonation to O* and hereby OER process is greatly passivated. Those instructive results provide a new approach to realizing highly efficient biomass upgrading by regulating the OER activity.
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Cu has weak OER activity, enabling high Faraday efficiency for HMFOR even at elevated potentials.
“Among them, Cu has attracted considerable research interest because its weak OER activity enables high Faraday efficiency for HMFOR even at elevated potentials [32–34].”
From Synergistically enhanced co-adsorption of OH− and HMF on Cu-modified Ni aerogel for biomass upgrading coupled with hydrogen production (2025) · cites this paper as [32]
Bimetallic NiCu catalysts are mature for HMFOR, but NiCu aerogels have not yet been investigated.
“Although bimetallic NiCu catalysts are mature for HMFOR, NiCu aerogels have not yet been investigated [32].”
From Synergistically enhanced co-adsorption of OH− and HMF on Cu-modified Ni aerogel for biomass upgrading coupled with hydrogen production (2025) · cites this paper as [32]
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References 64 · Cited by 235
- Authors
- Chen, D., Ding, Y., Cao, X., Wang, L., Lee, H., Lin, G., Li, W., Ding, G., & Sun, L.
- Affiliations
- Westlake University (CN)
- Corresponding author
- Sun, Licheng
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2023-08-04
- Volume
- 62
- Issue
- 37
- Pages
- e202309478-e202309478
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W4385186776
- Cited by
- 235
- References
- 64
- Citations by year
- 2026: 55 · 2025: 100 · 2024: 77 · 2023: 3
- FWCI
- 11.20
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Angewandte Chemie International Edition (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Key Research and Development Program of China (2022YFA0911900)
- National Natural Science Foundation of China (22109128)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Engineering › Biomedical Engineering › Catalysis for Biomass Conversion
- Physical Sciences › Chemistry › Organic Chemistry › Oxidative Organic Chemistry Reactions
- Keywords
- 5-hydroxymethylfurfural oxidation, biomass valorization, Ni foam support, Faradaic efficiency, copper doping
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