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.

中文翻译：

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吡唑介导的镍/镍氧化物杂化物表面合成，用于高效尿素辅助制氢


创造无聚集的致密官能化负载材料一直是非均相催化剂的最终目标之一。将现成的散装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，用于在氧化镍载体 （Ni/NiO） 上生成高负载且分散良好的镍纳米颗粒。这种表面合成是一个两步过程，涉及 Ni（OH）₂ 表面转化为一层链状吡唑镍 [Ni（pz）₂] 和一个超高真空退火过程，该过程抽空吡唑并将 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，从而能够使用单一催化剂实现高效的尿素电解。这种方法为金属氧化物负载材料提供了一种新颖的表面合成策略，并为先进的尿素辅助制氢提供了高效的催化剂。