Multifunctional High‐Entropy Alloys and Oxides for Self‐Powered Electrocatalytic Nitrate Reduction to Ammonia
High-entropy alloys (HEAs) show high activities toward oxygen reduction reaction (ORR), Zn-air batteries (ZABs) and nitrate reduction reaction (NO<sub>3</sub> <sup>-</sup>RR). In this work, FeNiCoMnRh HEA supported by N-doped carbon frameworks is prepared and showed excellent ORR performance with a half-wave potential (E<sub>1/2</sub>) of 0.89 V versus RHE, limiting diffusion current (j<sub>L</sub>) of 5.6 mA cm<sup>-2</sup> and better current stability. The HEA-assembled ZAB exhibited a high-power density of 103.8 mW cm<sup>-2</sup> with a specific capacity of 790 mAh g<sub>Zn</sub> <sup>-1</sup>. Also, its oxides presented 77% Faraday efficiency (FE) for ammonia production at -0.3 V versus RHE. Accordingly, our designed ZAB was employed to drive NO<sub>3</sub> <sup>-</sup>RR to construct a self-powered system, which provides an attractive route for low-energy sewage treatment and environmentally friendly preparation of ammonia.
Authors
- Jun Luo (ORCID: https://orcid.org/0000-0002-8093-5345)
- Quan Zhang (ORCID: https://orcid.org/0000-0002-6396-4953)
- Shiming Qiu
- Xijun Liu (ORCID: https://orcid.org/0000-0002-2624-6901)
- Lehua Wang (ORCID: https://orcid.org/0000-0002-4596-7886)
- Kang Lian
Institutions
- Tianjin University of Technology (CN)
- Minzu University of China (CN)
- University of Electronic Science and Technology of China (CN)
- Guangxi University (CN)
- Guangxi Normal University (CN)
- Institute for Advanced Study (US)
- Guangxi Normal University for Nationalities (CN)
- Hebei University (CN)
Publication Details
- Journal
- Chemistry - A European Journal
- Published
- 2025-03-14
- DOI
- https://doi.org/10.1002/chem.202500887
- Citations
- 4
- Primary Topic
- Ammonia Synthesis and Nitrogen Reduction
- Type
- article
- Field-Weighted Citation Impact
- 1.56