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Metal–Organic Framework-Derived Ceria-Supported Ni–Co Alloy Nanocatalysts for Hydrogenation of Nitroarenes
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-10-20 , DOI: 10.1021/acsanm.0c02086
Weizuo Li 1 , Wei She 1 , Jing Wang 1 , Xuewei Li 1 , Jingfang Li 1 , Jing Shi 2 , Guangming Li 1
Affiliation  

Metal–organic framework (MOF)-templated strategy is an effective route to fabricate nanocatalysts for heterogeneous catalytic reactions. In this work, a coordination-evaporation-calcination (CEC) strategy was developed to synthesize a ceria (CeO2)-supported Ni–Co alloy catalyst (termed Ni–Co/CeO2-CEC) from a quaternary MOF (named as Ni–Co–Zn–Ce–H2salen) designed by metalloligand strategy. The Ni–Co–Zn–Ce–H2salen and its cross-bridging Zn2+ ions simultaneously acted as self-sacrificing templates because of their thermal decomposition and evaporation at high-temperature (800 °C) pyrolysis process, which could facilitate the formation of bimetallic Ni–Co alloy with high dispersity and strengthen the Ni–Co–CeO2 interaction, as well as the high concentration of oxygen vacancy defects. These unique advantages endow Ni–Co/CeO2-CEC with outstanding catalytic activity and yield for the hydrogenation process compared with Ni–Co/CeO2–CC (prepared by coordination-calcination method) and Ni–Co/CeO2-IWI (prepared by incipient wetness impregnation) catalysts, as well as good recyclability. We anticipate that this CEC strategy designed by Ce–H2salen metalloligand will provide a way for synthesizing other efficient and low-cost supported catalysts for catalytic reactions.

中文翻译:

金属有机骨架衍生的二氧化铈负载的Ni-Co合金纳米催化剂用于硝基芳烃的加氢

金属有机框架(MOF)模板策略是制造用于多相催化反应的纳米催化剂的有效途径。在这项工作中,开发了配位蒸发煅烧(CEC)策略,以从四元MOF(命名为Ni )合成二氧化铈(CeO 2)负载的Ni-Co合金催化剂(称为Ni-Co / CeO 2 -CEC)。 -Co-Zn-Ce-H 2 salen)由金属配体策略设计。Ni-Co-Zn-Ce-H 2 salen及其交叉桥连的Zn 2+离子由于在高温(800°C)热解过程中会发生热分解和蒸发,因此同时充当自牺牲模板。高分散性双金属镍钴合金的形成并增强了镍钴钴2相互作用,以及高浓度的氧空位缺陷。这些独特的优点赋予镍钴/的CeO 2 -CEC以优异的催化活性和产率与镍钴/铈相比,加氢处理2 -CC(通过协调煅烧方法制备)和镍-钴/的CeO 2 -IWI(通过初期湿法浸渍制备的催化剂,以及良好的可回收性。我们预计,由Ce–H 2 salen metalloligand设计的CEC策略将为合成其他高效且低成本的负载型催化剂进行催化反应提供一条途径。
更新日期:2020-11-25
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