Pyrazole-Mediated On-Surface Synthesis of Nickel/Nickel Oxide Hybrids for Efficient Urea-Assisted Hydrogen Production

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-12-23 DOI:10.1021/acs.nanolett.4c04826

Zhe Chen, Can Lei, Liu Xudong, Ya Li, Tao Jiang, Wei Du, Shaoyan Wang, Xuejing Yang, Ming Gong

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Abstract

Creating densely functionalized supported materials without aggregation has been one of the ultimate goals for heterogeneous catalysts. Direct conversion of readily available bulk materials into highly dispersed supported materials could be highly beneficial for real applications. In this work, we invented an on-surface synthetic strategy for generating highly loaded and well-dispersed nickel nanoparticles on nickel oxide supports (Ni/NiO). This on-surface synthesis is a two-step process involving the surface transformation of Ni(OH)₂ into a layer of chain-like nickel pyrazolate [Ni(pz)₂] and an ultra-high-vacuum annealing process that evacuates the pyrazole and decomposes the Ni(OH)₂ into the Ni/NiO hybrid. The highly dispersed Ni/NiO catalyst exhibited superior activities and long-term stability for both the urea oxidation reaction and the hydrogen evolution reaction, which enables efficient urea electrolysis with a single catalyst. This approach presents a novel on-surface synthetic strategy for metal oxide-supported materials and offers efficient catalysts for advanced urea-assisted hydrogen production.

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吡唑介导的镍/氧化镍杂化物的表面合成及其高效尿素辅助制氢研究

创造密集功能化的支撑材料而不聚集一直是多相催化剂的最终目标之一。将现成的块状材料直接转化为高度分散的支撑材料对实际应用非常有益。在这项工作中，我们发明了一种表面合成策略，用于在镍氧化物载体（Ni/NiO）上生成高负载和分散良好的镍纳米颗粒。这种表面合成是一个两步过程，包括Ni(OH)2的表面转化成一层链状的吡甲酸镍[Ni(pz)2]，以及超高真空退火过程，该过程将吡唑排出并将Ni(OH)2分解成Ni/NiO杂化物。高度分散的Ni/NiO催化剂在尿素氧化反应和析氢反应中均表现出优异的活性和长期稳定性，实现了单催化剂高效的尿素电解。该方法提出了一种新的金属氧化物负载材料的表面合成策略，并为先进的尿素辅助制氢提供了有效的催化剂。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.