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Polyoxometalate-based metal-organic framework loading with ultra-low amount of Pt as efficient electrocatalyst for hydrogen production

Abstract

The development of high-active and stable electrocatalyst for HER has received extensive attention. Among them, minimizing the Pt usage and promoting its utilization efficiency are essential prerequisites for future hydrogen economy. Herein, we use a new Ɛ-Keggin-type polyoxometalate-based metal-organic framework H3[Zn4(bimb)2][PMoV8 MoVI4O40]•12H2O (abbr. POMOF-1) as support to load low amount of ultrasmall Pt nanoparticles (NPs), and then mix them with Ketjen black carbon (KB) to form a new composite catalyst (abbr. Pt@POMOF-1/KB). Such composite catalyst displays low Pt loading amount of 0.43 wt% and the average size of Pt NPs is 1.5 nm. Pt@POMOF-1/KB exhibits remarkable HER performance in 0.5 M H2SO4. It only needs 23 mV overpotential to meet the current density of 10 mA•cm-2, which is superior to that of 20% Pt/C. The mass activity of Pt@POMOF-1/KB is almost 100 and 37 times than that of 20% Pt/C at overpotentials of 50 and 100 mV due to the low noble-metal loading. This result may provide an approach to meet the cost requirements for large-scale applications.

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Publication details

The article was received on 13 Jul 2018, accepted on 12 Aug 2018 and first published on 13 Aug 2018


Article type: Paper
DOI: 10.1039/C8CE01151F
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Polyoxometalate-based metal-organic framework loading with ultra-low amount of Pt as efficient electrocatalyst for hydrogen production

    H. Peng, X. Yang, Y. Ma, J. Liu, Y. Wang, H. Tan and Y. Li, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01151F

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