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Hierarchical CuCo2S4 nanoarrays for high-efficient and durable water oxidation electrocatalysis

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Abstract

It is highly attractive to design and develop earth-abundant electrocatalysts toward high-efficiency water oxidation electrocatalysis in alkaline media. In this communication, we report the in situ hydrothermal sulfidization preparation of a hierarchical CuCo2S4 nanoarray on copper foam (CuCo2S4/CF) from its CuCo2-hydroxide nanowire array precursor. When used as a 3D catalyst electrode for water oxidation, the as-prepared CuCo2S4/CF is superior in catalytic activity, demanding overpotentials of only 259 and 295 mV to achieve 60 and 100 mA cm−2 in 1.0 M KOH, respectively. Moreover, it also shows strong electrochemical durability with high turnover frequency values of 0.069 and 0.390 mol O2 s−1 at overpotentials of 300 and 400 mV, respectively.

Graphical abstract: Hierarchical CuCo2S4 nanoarrays for high-efficient and durable water oxidation electrocatalysis

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Publication details

The article was received on 18 Sep 2017, accepted on 27 Nov 2017 and first published on 27 Nov 2017


Article type: Communication
DOI: 10.1039/C7CC07259G
Citation: Chem. Commun., 2018, Advance Article
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    Hierarchical CuCo2S4 nanoarrays for high-efficient and durable water oxidation electrocatalysis

    L. Yang, L. Xie, X. Ren, Z. Wang, Z. Liu, G. Du, A. M. Asiri, Y. Yao and X. Sun, Chem. Commun., 2018, Advance Article , DOI: 10.1039/C7CC07259G

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