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Ni3[Fe(CN)6]2 nanocubes boost the catalytic activity of Pt towards electrochemical hydrogen evolution

Abstract

Cost-effective and highly efficient electrocatalysts for hydrogen evolution reaction (HER) are crucial and highly desired in sustainable energy field. Despite the tremendous efforts on the development of alternative catalysts, Pt is still the most efficient catalyst for HER. Nevertheless, it remains a great challenge to output sufficient catalytic activity with low Pt loading. Herein, we employ Prussian blue analogues (PBA) of Ni3[Fe(CN)6]2 nanocubes as the active substrate to enhance the HER activity of Pt by fabricating Pt-Ni3[Fe(CN)6]2 interface. Ni species of Ni3[Fe(CN)6]2 play key roles in contributing to the water dissociation and improving the HER kinetics, as well as helping to maintain the catalytic activity of Pt during long-term durable test in both acidic and alkaline media. As a result, the designed Ni3[Fe(CN)6]2/Pt hybrid catalyst exhibits superior catalytic property towards HER in both H2SO4 and KOH with low Pt loading of only 4.0%. Impressively, a low overpotential of 59 mV is achieved at current density of 10 mA cm-2 in H2SO4, and a high mass current density of 3.75 mA μgPt-1 is obtained at overpotential of 70 mV, which outperforms currently reported Pt based catalyst in acid electrolyte. We believe that this work will inspire the design of PBA-based hybrid nanomaterials with improved or new functionalities for energy conversion and catalysis applications.

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Supplementary files

Publication details

The article was received on 13 Feb 2018, accepted on 11 May 2018 and first published on 14 May 2018


Article type: Research Article
DOI: 10.1039/C8QI00134K
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Ni3[Fe(CN)6]2 nanocubes boost the catalytic activity of Pt towards electrochemical hydrogen evolution

    X. Zhang, P. Liu, Y. Sun, T. Zhan, Q. Liu, L. Tang, J. Guo and Y. Xia, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00134K

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