Bimetal anchoring porous MXene nanosheets for driving tandem catalytic high‐efficiency electrochemical nitrate reduction

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL AIChE Journal Pub Date : 2024-10-17 DOI:10.1002/aic.18628

Rongyu Guo, Zhijie Cui, Tianyang Yu, Jing Li, Wenchao Peng, Jiapeng Liu

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Abstract

Electrochemical nitrate reduction reaction (NO3RR) is considered a promising strategy for ammonia synthesis and nitrate removal, in which catalyst development is crucial. Herein, a series of bimetal (Co and Cu) anchoring porous MXene nanosheets (CoxCuy@PM) catalysts were prepared by combining etching and reduction strategy. On the one hand, Cu and Co bimetals provided tandem catalytic active sites for NO3RR. On the other hand, the in‐plane PM exhibited good electrical conductivity and multiple transport pathways. Consequently, the optimized Co7Cu3@PM catalyst achieved a high ammonia yield of 7.43 mg h−1 mg cat.−1 and an excellent Faraday efficiency (FE) of 95.9%. The mechanism of NO3RR was investigated by analyzing electrolysis products and in situ Fourier transform infrared spectroscopy. Furthermore, the Co7Cu3@PM based ZnNO3− battery exhibited the superior power density of 5.59 mW cm−2 and an NH3 FE of 92.3%. This work presents an effective strategy to design MXene‐based high‐performance NO3RR electrocatalysts.

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驱动串联催化高效电化学硝酸盐还原的双金属锚定多孔 MXene 纳米片

电化学硝酸盐还原反应（NO3RR）被认为是合成氨和去除硝酸盐的一种有前途的策略，其中催化剂的开发至关重要。在此，我们结合蚀刻和还原策略制备了一系列双金属（Co 和 Cu）锚定多孔 MXene 纳米片（CoxCuy@PM）催化剂。一方面，Cu 和 Co 双金属为 NO3RR 提供了串联催化活性位点。另一方面，面内 PM 具有良好的导电性和多种传输途径。因此，优化的 Co7Cu3@PM 催化剂实现了 7.43 mg h-1 mg cat.-1 的高氨产量和 95.9% 的出色法拉第效率（FE）。通过分析电解产物和原位傅立叶变换红外光谱，研究了 NO3RR 的机理。此外，基于 Co7Cu3@PM 的 ZnNO3- 电池显示出 5.59 mW cm-2 的超高功率密度和 92.3% 的 NH3 FE。这项工作为设计基于 MXene 的高性能 NO3RR 电催化剂提供了一种有效的策略。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.