Surface-modified copper foam for nitrate-to-ammonia and zinc-nitrate fuel cell catalysis

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-09-04 DOI:10.1016/j.materresbull.2024.113079

Pengcheng Ma , Lingtian Lu , Qianqian Wang , Ran Bi , Fang Chen , Qiufan Tang , Xiaoyan Ma

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Abstract

Electrochemical reduction of nitrate to ammonia is a promising method for treating nitrate-containing wastewater and synthesizing high-value-added ammonia. However, the low catalytic efficiency of electrocatalysts and the complex process of catalyst preparation hinder the practical application and development of nitrate-to-ammonia conversion. In this work, Cu rearrangement on the surface of copper foam (CF) was achieved through a surface reconstruction engineering strategy, resulting in the construction of a high-performance NO₃RR electrocatalytic electrode (Cu@CF). Benefiting from the ideal structural advantages, the performance of Cu@CF in NO₃RR was significantly improved, with NH₃ production rates reaching up to 7.9 mg h^-1 cm^-2 and a Faradaic efficiency of 92.3%. Furthermore, the zinc-nitrate fuel cell assembled with Cu@CF and zinc foil also showed excellent fuel cell performance, with an output voltage of up to 1.4 V and power density of 3.9 mW cm^-2. This study has reference value for the development of efficient, stable and inexpensive NO₃RR electrodes.

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用于硝酸-氨和硝酸锌燃料电池催化的表面改性泡沫铜

电化学还原硝酸盐为氨是一种处理含硝酸盐废水和合成高附加值氨的可行方法。然而，电催化剂催化效率低、催化剂制备过程复杂等问题阻碍了硝酸转化为氨的实际应用和发展。在这项工作中，通过表面重构工程策略实现了泡沫铜（CF）表面的铜重排，从而构建了高性能的 NO3RR 电催化电极（Cu@CF）。得益于理想的结构优势，Cu@CF 在 NO3RR 中的性能得到显著提高，NH3 生成率高达 7.9 mg h-1 cm-2，法拉第效率为 92.3%。此外，用 Cu@CF 和锌箔组装的硝酸锌燃料电池也表现出优异的燃料电池性能，输出电压高达 1.4 V，功率密度为 3.9 mW cm-2。这项研究对开发高效、稳定和廉价的 NO3RR 电极具有参考价值。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.