Co0.85Se on three-dimensional hierarchical porous graphene-like carbon for highly effective oxygen evolution reaction

Designing an efficient, cheap and abundant catalyst for oxygen evolution reaction (OER) is crucial for the development of sustainable energy sources. A novel catalyst which could be a promising candidate for such electrocatalysts is described. Co0.85Se supported on three-dimensional hierarchical por...

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Bibliographic Details
Published in:International journal of hydrogen energy 2019-04, Vol.44 (21), p.10182-10189
Main Authors: Zhong, Qi-Sui, Xia, Wei-Yan, Liu, Bo-Cai, Xu, Chang-Wei, Li, Nan
Format: Article
Language:English
Subjects:
Co selenides
Co0.85Se
Graphene
Oxygen evolution
Water splitting
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Summary:Designing an efficient, cheap and abundant catalyst for oxygen evolution reaction (OER) is crucial for the development of sustainable energy sources. A novel catalyst which could be a promising candidate for such electrocatalysts is described. Co0.85Se supported on three-dimensional hierarchical porous graphene-like carbon (HPG) exhibits outstanding catalytic performances for OER in alkaline medium. It is found that the onset overpotential is 311 mV on the Co0.85Se/HPG electrode, which is more 28 and 41 mV negative than that on the Co/HPG and Co3O4/HPG electrodes. What's more, the value of Tafel slope is 61.7 mV dec−1 and the overpotential at the current density of 10 mA cm−2 is 385 mV on this electrode. The Co0.85Se/HPG of this work is an appealing electrocatalyst for OER in basic electrolyte. [Display omitted] •Co0.85Se is used as catalyst for oxygen evolution reaction.•3D hierarchical porous graphene-like carbon is used as support for Co0.85Se.•Tafel valueis 61.7 mV dec−1 on Co0.85Se/HPG.•Overpotential at 10 mA cm−2 is 385 mV on Co0.85Se/HPG.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2019.03.003