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Pyrite FeS2/C nanoparticles as an efficient bi-functional catalyst for overall water splitting

Abstract

Exploration and fabrication of low-cost but high active electrocatalysts, alternatives to noble metals, remain a challenge for overall water splitting reaction. To date, few literatures report that the earth-abundant pyrite FeS2 is catalytically active for hydrogen evolution reaction; while there is no study on the oxygen evolution reaction and overall water splitting reaction using pyrite FeS2 as electrocatalysts. Here, we offer a facile hydrothermal approach for the synthesis of FeS2 nanoparticles by the reduction of FeCl3•6H2O with C5H10NS2Na•3H2O. The FeS2/C nanoparticles on Ni foam (NF) deliver 10 mA/cm2 at the overpotential of 240 mV towards oxygen evolution reaction, which is lower than that of IrO2. It requires 202 mV to drive hydrogen evolution reaction to reach 10 mA/cm2; while long-term durability and faster charge-transfer kinetics confirm the good hydrogen evolution reaction performance on FeS2/C/Ni foam. Moreover, the pyrite FeS2/C/ nanoparticles on Ni foam are assembled as anode and cathode in the two-electrode alkaline electrolyzer and show the good overall water splitting efficiency with 1.72 V at 10 mA/cm2.

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Supplementary files

Publication details

The article was received on 18 Jul 2018, accepted on 13 Sep 2018 and first published on 14 Sep 2018


Article type: Paper
DOI: 10.1039/C8DT02927J
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Pyrite FeS2/C nanoparticles as an efficient bi-functional catalyst for overall water splitting

    Z. Li, M. Xiao, Y. Zhou, D. Zhang, H. Wang, X. liu, D. Wang and W. Wang, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT02927J

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