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Issue 43, 2014
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Cobalt vanadate as highly active, stable, noble metal-free oxygen evolution electrocatalyst

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Abstract

Water splitting, to produce hydrogen and oxygen, has long been considered to be a desirable option for the storage of electrical energy. The catalysts for oxygen evolution reactions (OER) are very important in this process. Herein, we have synthesized Co3V2O8 nanoparticles by a simple and cost-effective technique, which have low crystallinity and large specific surface area (122.8 m2 g−1). Because of the low crystallinity, large specific surface area and suitable pore size, Co3V2O8 nanoparticles yielded an electrocatalytic OER current density of up to 429.7 mA cm−2 at 2.05 V vs. RHE and low OER over potentials of 359 mV (at 10 mA cm−2) and 497 mV (at 100 mA cm−2). In addition, the OER stability of the Co3V2O8 catalyst was very excellent, and the current density at 2.05 V was reduced by just 7.3% after galvanostatic OER measurement at 10 mA cm−2 for 3 h. This work demonstrates that binary metal oxides Co3V2O8 is a highly active and stable oxygen evolution electrocatalyst that can potentially replace expensive noble metal-based anode catalysts for electrochemical water splitting to generate hydrogen fuels.

Graphical abstract: Cobalt vanadate as highly active, stable, noble metal-free oxygen evolution electrocatalyst

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Publication details

The article was received on 22 Jul 2014, accepted on 15 Sep 2014 and first published on 15 Sep 2014


Article type: Paper
DOI: 10.1039/C4TA03776F
J. Mater. Chem. A, 2014,2, 18435-18443

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    Cobalt vanadate as highly active, stable, noble metal-free oxygen evolution electrocatalyst

    M. Xing, L. Kong, M. Liu, L. Liu, L. Kang and Y. Luo, J. Mater. Chem. A, 2014, 2, 18435
    DOI: 10.1039/C4TA03776F

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