Emerging as a promising hydrogen carrier, hydrous hydrazine has attracted great attention in hydrogen storage and transportation. Herein, by using a wet‐chemical reduction method, ultrafine bimetallic PtNi nanoparticles (NPs) with an average size of 1.8 nm are immobilized on a metal–organic framework templated zirconia/porous carbon/reduced graphene oxide (ZrO₂/C/rGO) support. Monometallic Pt and Ni NPs show no activities for the catalytic dehydrogenation of hydrous hydrazine. Surprisingly, the obtained bimetallic Pt–Ni NPs exhibits a significantly enhanced catalytic activity toward the hydrogen generation from hydrous hydrazine, with which an extremely high turnover frequency value can be afforded to 1920 h⁻¹ at 323 K. The highly enhanced catalytic activity can be attributed to the small size effect, the strong synergistic effect between Pt and Ni atoms as well as the strong metal‐support interactions. The present work provides a new insight to developing high‐performance bimetallic catalysts for advanced catalytic and energy technologies.

中文翻译：

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金属有机骨架模板氧化锆/多孔碳/还原氧化石墨烯制备的超细双金属Pt-Ni纳米颗粒：在水合肼脱氢中的显着催化活性

含水肼作为一种有前途的氢载体，在氢的存储和运输中引起了极大的关注。在这里，通过湿化学还原法，将平均尺寸为1.8 nm的超细双金属PtNi纳米颗粒（NPs）固定在以氧化锆/多孔碳/氧化石墨烯（ZrO ₂ / C / rGO）为模板的金属-有机骨架上支持。单金属Pt和Ni NPs对含水肼无催化脱氢作用。出乎意料的是，所获得的双金属Pt-Ni NPs对水合肼产生的氢气具有显着增强的催化活性，从而可以在1920 h ^-1内提供极高的周转率值。在323 K时。催化活性的高度增强可归因于小尺寸效应，Pt和Ni原子之间的强协同效应以及强金属-载体相互作用。本工作为开发用于高级催化和能源技术的高性能双金属催化剂提供了新的见解。