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Ternary PtVCo Dendrites for Hydrogen Evolution Reaction, Oxygen Evolution Reaction, Overall Water Splitting and Rechargeable Zn–Air Batteries

Abstract

Designing a highly active, robust and cost-effective electrocatalyst with multiple functionalities toward overall water splitting and rechargeable Zn-air battery applications is crucial and urgent for the development of sustainable energy sources. Herein, we report the one-step facile fabrication of ternary PtVCo alloyed dendrites as highly efficient bifunctional catalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), as well as its deployment for both overall water splitting and rechargeable Zn-air batteries. Its HER activity and long-term durability were superior than commercial Pt/C, while the OER performance was close to that of the standard IrO2 catalyst. The PtVCo modified electrode can catalyze water splitting very efficiently. Furthermore, in the self-assembled rechargeable Zn-air battery test, PtVCo exhibited the narrow charge-discharge voltage gap of 0.88 V and a maximal power density of 235 mW cm-2, which outperformed the performance of Pt/C. The excellent performance of PtVCo is mainly attributed to the synergistic contributions from Pt, V and Co, as the introduction of two transition metals significantly alter the electronic structure and the surface local ordering atmosphere.

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Publication details

The article was received on 01 Jul 2018, accepted on 06 Aug 2018 and first published on 07 Aug 2018


Article type: Research Article
DOI: 10.1039/C8QI00623G
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Ternary PtVCo Dendrites for Hydrogen Evolution Reaction, Oxygen Evolution Reaction, Overall Water Splitting and Rechargeable Zn–Air Batteries

    Z. Ding, Z. Tang, L. Li, K. Wang, W. Wu, X. Chen, X. Wu and S. Chen, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00623G

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