高耐久性Ni-Cu-Mo催化剂的制备及其电解氨制氢性能

doi:10.15541/jim20250384

摘要/Abstract

摘要： 开发低成本、高活性及高稳定性的电化学氨氧化反应(AOR)催化剂是提升氨电解制氢技术整体效率的关键。本研究通过简便的一步水热法,以泡沫镍(Nickel Foam, NF)为基底和镍源,原位构筑了Cu、Mo均匀负载且具有层次化纳米花蕊结构的Ni-Cu-Mo整体式催化剂,并将其直接应用于氨水产氢。实验结果显示,Ni-Cu-Mo催化剂表现出卓越的电催化活性,其起始电位仅为1.32 V (vs. RHE)@10 mA·cm^-²,在1.5 V (vs. RHE)电位下可以持续运行64 h,电流密度稳定维持在100 mA·cm^-2以上,展现出极佳的工业应用潜力。性能增强机制解析表明： Mo掺杂调控形成的纳米花蕊形貌提供了丰富的活性位点暴露空间;三维泡沫镍骨架不仅确保了高效的电荷传输,还增强了电解过程中的机械与化学稳定性;Ni和Cu之间的电子效应显著加速了AOR反应动力学。本研究研制的新型自支撑Ni-Cu-Mo催化剂为高效氨氧化制氢提供了重要材料平台,也为未来设计氨-氢混合零碳燃料相关的电催化体系提供了新思路。

关键词: 氨氧化, 电催化, 纳米复合材料, 氨-氢混合零碳燃料, 长期稳定性

Abstract: Developing low-cost, highly active, and durable electrocatalysts for the ammonia oxidation reaction (AOR) is pivotal for enhancing the overall efficiency of ammonia-to-hydrogen conversion technologies. In this work, a monolithic Ni-Cu-Mo electrocatalyst featuring a hierarchical nanoflower architecture was in-situ constructed on a nickel foam (NF) substrate which was both the support and nickel source via a facile one-step hydrothermal method. The integrated electrode was directly applied to ammonia-to-hydrogen production. Experimental results demonstrate that the Ni-Cu-Mo catalyst exhibits exceptional electrocatalytic activity, achieving a low onset potential of 1.32 V (vs. RHE)@10 mA·cm^-2. Furthermore, it maintains a stable current density exceeding 100 mA·cm^-2 for 64 h of continuous operation at 1.5 V (vs. RHE), showcasing outstanding potential for industrial applications. Mechanistic insights reveal that the morphology of hierarchical nanoflower induced by Mo-doping provides ample exposure of active sites, while the three-dimensional (3D) nickel foam scaffold ensures efficient charge transport and enhances mechanical and chemical stability during the electrolysis process. Simultaneously the electronic interaction between Ni and Cu significantly accelerate the AOR reaction kinetics. This study presents a novel self-supported Ni-Cu-Mo electrocatalyst as a robust material platform for efficient ammonia-based hydrogen production and provides innovative strategies for designing electrocatalytic systems for ammonia-hydrogen blended zero-carbon fuels in future.

Key words: ammonia oxidation, electrocatalysis, nanocomposites, ammonia-hydrogen blended zero-carbon fuel, long-term stability

中图分类号:

O643

李智杰, 王潇漾, 穆晓江, 朱思靖, 苗蕾. 高耐久性Ni-Cu-Mo催化剂的制备及其电解氨制氢性能[J]. 无机材料学报, DOI: 10.15541/jim20250384.

LI Zhijie, WANG Xiaoyang, MU Xiaojiang, ZHU Sijing, MIAO Lei. Highly Durable Ni-Cu-Mo Catalyst: Preparation and Performance for Hydrogen Evolution through Ammonia Oxidation Reaction[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250384.

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