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Composition-dependent catalytic activity of bimetallic PtPd dendrimer-encapsulated nanoparticles having an average size of 1.7 nm for hydrolytic dehydrogenation of ammonia borane

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Abstract

We investigated composition-dependent catalytic activity of bimetallic PtPd dendrimer-encapsulated nanoparticles (DENs) that had a uniform size of ∼1.7nm for hydrolytic dehydrogenation of ammonia borane (AB). The PtPd DENs, composed of seven different Pt: Pd ratios, were synthesized using hydroxyl-terminated sixth-generation polyamidoamine dendrimers as a molecular template. The dendrimer-templating method allowed for synthesizing bimetallic PtPd DENs with controllable nanoparticle composition while fixing the size of the nanoparticles uniformly at ∼1.7 nm. Compared with monometallic Pt and Pd DENs, the bimetallic PtPd DENs showed superior catalytic activity for the hydrolytic dehydrogenation of AB. Furthermore, the bimetallic PtPd DENs exhibited composition-dependent activity with the maximum activity (i.e., average turnover frequency=108.5±15.9molH2·molatom Pt+pd−1·min−1) at a Pt: Pd ratio of 1:1 for the catalytic hydrolysis of AB.

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Acknowledgements

This work was supported by the National Research Foundation of Korea funded by the Ministry of Science, ICT and Future Planning (NRF-2019M3E6A1065038 and NRF-2016M1A2A2936638) and the KIST Institutional Program (2Z05790-19-037).

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Authors and Affiliations

  1. Department of Chemistry, Research Institute for Basic Sciences, KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, 02447, Korea

    Youngwon Ju & Joohoon Kim

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  1. Youngwon Ju
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  2. Joohoon Kim
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Correspondence to Joohoon Kim.

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11814_2020_604_MOESM1_ESM.pdf

Composition-dependent catalytic activity of bimetallic PtPd dendrimer-encapsulated nanoparticles having an average size of 1.7 nm for hydrolytic dehydrogenation of ammonia borane

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Ju, Y., Kim, J. Composition-dependent catalytic activity of bimetallic PtPd dendrimer-encapsulated nanoparticles having an average size of 1.7 nm for hydrolytic dehydrogenation of ammonia borane. Korean J. Chem. Eng. 37, 1387–1393 (2020). https://doi.org/10.1007/s11814-020-0604-4

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  • DOI: https://doi.org/10.1007/s11814-020-0604-4

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