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Template-free solvothermal preparation of ternary hollow balloons as RuO2-like efficient electrocatalysts for oxygen evolution reaction with superior stability

Abstract

Ternary transition metal sulfide hollow structures are promising materials for energy storage and conversion applications. However, their synthetic methods are rather complicated and time-consuming. In this work, for the first time, with FeNi2S4 hollow balloons (FNSH) as the quintessential example, a template-free solvothermal method is developed to synthesize ternary transition metal sulfide hollow balloons. The corresponding formation mechanism is deeply investigated, while the main factors affecting the formation of the hollow balloons are confirmed to be reaction time and temperature. FNSH/graphene aerogel (FNSH/GA) is further fabricated, which has been proven to be a highly efficient electrocatalyst for oxygen evolution reaction (OER). The FNSH/GA exhibits excellent performance for OER with a small overpotential of 273 mV at 10 mA cm−2 in 1.0 M KOH, which is even superior to the typical RuO2 catalyst. Furthermore, the FNSH/GA maintains the excellent performance for OER even after 10 h chronoamperometric test. Moreover, the synthetic method is universal and can be widely extended to other ternary transition metal sulfide hollow balloons.

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Publication details

The article was received on 23 Jun 2018, accepted on 04 Sep 2018 and first published on 10 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA06051G
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Template-free solvothermal preparation of ternary hollow balloons as RuO2-like efficient electrocatalysts for oxygen evolution reaction with superior stability

    H. Wang, J. Tang, Y. Li, H. Chu, Y. Ge, R. Baines, P. Dong, P. M. Ajayan, J. F. shen and M. Ye, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA06051G

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