The development of high-performance and low-cost alkaline hydrogen precipitation catalysts is critical for the large-scale application of hydrogen energy. In this work, the nanoporous alloy catalysts were synthesized by dealloying melt-spun NiZrPt ribbons. The optimal sample after dealloying shows excellent HER performance in alkaline medium, with a small overpotential of 15 mV to deliver 10 mA cm and a low Tafel slope of 20 mV/dec. The material characterization reveals that the incorporation of Ni modulates the electronic structure of Pt. After selective dealloying of Zr and Ni, a Pt-enriched nanoporous structure was formed on the catalyst surface. Meanwhile, the remaining Ni sites acted as synergistic sites to activate the Pt sites, which allowed for better hydrogen adsorption energy and faster kinetics of the catalytic reaction. Besides, the favorable mechanical flexibility of the material makes it potential for self-supporting electrode. This work presents a way to prepare low-Pt efficient catalysts by amorphous alloy dealloying.

中文翻译：

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非晶 NiZrPt 金属玻璃脱合金用于碱性析氢反应制备纳米多孔 NiPt 合金

开发高性能、低成本的碱性析氢催化剂对于氢能的大规模应用至关重要。在这项工作中，通过脱合金熔纺NiZrPt带材合成了纳米多孔合金催化剂。脱合金后的最佳样品在碱性介质中表现出优异的 HER 性能，具有 15 mV 的小过电位可提供 10 mA cm 电流和 20 mV/dec 的低塔菲尔斜率。材料表征表明，Ni 的掺入调节了 Pt 的电子结构。 Zr和Ni选择性脱合金后，催化剂表面形成富Pt的纳米孔结构。同时，剩余的Ni位点作为协同位点来激活Pt位点，从而实现更好的氢吸附能和更快的催化反应动力学。此外，该材料良好的机械柔韧性使其具有作为自支撑电极的潜力。这项工作提出了一种通过非晶合金脱合金制备低 Pt 高效催化剂的方法。