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Metal-organic Frameworks Immobilized RhNi Alloy Nanoparticles for Complete H2 Evolution from Hydrazine Borane and Hydrous Hydrazine

Abstract

Metal-organic frameworks (MOFs) immobilized Rh-Ni alloy nanoparticles (NPs) with a mean size of 2.8 nm have been facilely and successfully fabricated via a reduction rate controlled method. Metal alloy NPs/MOF composites with uniform tiny RhNi alloy NPs immobilized on MOF, high surface areas (1970 m2∙g-1), and accessible porous structure have been obtained. The resulting RhNi/MOF catalysts show high catalytic activity and robust durability for complete H2 evolution from both hydrazine borane (N2H4BH3) and hydrous hydrazine (N2H4∙H2O). The optimized Rh0.8Ni0.2/MIL-101 catalyst exhibits excellent catalytic performance for dehydrogenation of N2H4BH3 and N2H4∙H2O with 100% conversion and hydrogen selectivity, high total turnover frequencies (TOF), up to 1200 and 428.6 mol(H2) ∙mol(Rh+Ni) -1 ∙h-1, respectively, the highest over Rh-based catalysts. The high activity and prominent durability of Rh0.8Ni0.2/MIL-101 are highly dependent on the features of the MOF immobilized tiny RhNi alloy NPs, the strong interaction between MOF crystal and RhNi NPs, the optimized surface and electronic stracture of RhNi alloy with an atomic ratio of 8:2, and the accessible open porous structure for freely mass transfer.

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Publication details

The article was received on 09 Sep 2017, accepted on 26 Nov 2017 and first published on 27 Nov 2017


Article type: Research Article
DOI: 10.1039/C7QI00555E
Citation: Inorg. Chem. Front., 2017, Accepted Manuscript
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    Metal-organic Frameworks Immobilized RhNi Alloy Nanoparticles for Complete H2 Evolution from Hydrazine Borane and Hydrous Hydrazine

    Z. Zhang, S. Zhang, Q. Yao, G. Feng, M. Zhu and Z. Lu, Inorg. Chem. Front., 2017, Accepted Manuscript , DOI: 10.1039/C7QI00555E

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