In Situ Construction of Pt-Ni NF@Ni-MOF-74 for Selective Hydrogenation of p-Nitrostyrene by Ammonia Borane.,Chemistry - A European Journal

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In Situ Construction of Pt-Ni NF@Ni-MOF-74 for Selective Hydrogenation of p-Nitrostyrene by Ammonia Borane.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-06-08 , DOI: 10.1002/chem.202002305
Jinhui Xu _{1,

2} , Junjiang Zhu ₃ , Yu Liu ₁ , Yan Long ₁ , Jing Feng _{1,

2} , Xiangguang Yang _{1,

2} , Yibo Zhang _{1,

2} , Shuyan Song _{1,

2} , Hongjie Zhang _{1,

2,

4}

Affiliation

Pt–Ni nanoframes (Pt–Ni NFs) exhibit outstanding catalytic properties for several reactions owing to the large numbers of exposed surface active sites, but its stability and selectivity need to be improved. Herein, an in situ method for construction of a core–shell structured Pt‐Ni NF@Ni‐MOF‐74 is reported using Pt–Ni rhombic dodecahedral as self‐sacrificial template. The obtained sample exhibits not only 100 % conversion for the selective hydrogenation of p‐nitrostyrene to p‐aminostyrene conducted at room temperature, but also good selectivity (92 %) and high stability (no activity loss after fifteen runs) during the reaction. This is attributed to the Ni‐MOF‐74 shell in situ formed in the preparation process, which can stabilize the evolved Pt–Ni NF and donate electrons to the Pt metals that facilitate the preferential adsorption of electrophilic NO₂ group. This study opens up new vistas for the design of highly active, selective, and stable noble‐metal‐containing materials for selective hydrogenation reactions.

中文翻译：

Pt-Ni NF @ Ni-MOF-74的原位构建，用于氨硼烷选择性加氢对硝基苯乙烯。

Pt-Ni纳米骨架（Pt-Ni NFs）由于暴露在外的大量表面活性部位而对几种反应均表现出出色的催化性能，但其稳定性和选择性有待提高。在本文中，报道了一种以Pt-Ni菱形十二面体为自牺牲模板的核壳结构Pt-Ni NF @ Ni-MOF-74的原位构建方法。将得到的试样不仅显示100％转化为选择性氢化p硝基苯乙烯向p-氨基苯乙烯在室温下进行，但反应期间具有良好的选择性（92％）和高稳定性（十五次运行后无活性损失）。这归因于在制备过程中原位形成的Ni-MOF-74壳层，该壳层可以稳定析出的Pt-Ni NF并向Pt金属提供电子，从而有利于亲电NO ₂基团的优先吸附。这项研究为设计用于选择性加氢反应的高活性，选择性和稳定的含贵金属材料开辟了新的前景。

更新日期：2020-06-08

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