Phosphorus and Sulfur Co‐Doped Cobaltous Oxide Synthesized by an Inorganic‐Salt‐Assisted Method: Reaction Mechanism and Electrocatalytic Application

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Roy, Jagadish Chandra
Al-Mamun, Mohammad
Yin, Huajie
Dou, Yuhai
Zhang, Lei
Liu, Porun
Wang, Yun
Zhong, Yu Lin
Zhao, Huijun
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2020
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Inorganic‐salt‐assisted non‐metallic heteroatom (phosphorus and sulphur) co‐doped cobaltous oxide (P/S‐CoO) has been reported. Potassium sulphate (K 2 SO 4 ) was used as inorganic source of sulphur (S), while triphenyl phosphine (PPh 3 ) was used as phosphorus (P) source. A stepwise mechanistic investigation into the doping process revealed the decomposition of PPh 3 triggered the release of both the elemental sulphur and phosphorus via a reducing reaction environment. The transformation of cobalt‐PPh 3 complex into cubic cobalt (II) oxide along with the successful co‐doping (P and S) was achieved by high temperature calcination at 800 °C but preserved the bulk CoO crystalline structure. The as synthesized P/S‐CoO demonstrated an unprecedented enhancement on the oxygen evolution activity compare to that of pristine CoO with the current density of 10 mA/cm 2 at the overpotential of 293 mV in 1.0 M KOH electrolyte and profound stability at different current densities.

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ChemPlusChem

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© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Phosphorus and Sulfur Co‐Doped Cobaltous Oxide Synthesized by an Inorganic‐Salt‐Assisted Method: Reaction Mechanism and Electrocatalytic Application, ChemPlusChem, 2020, which has been published in final form at https://doi.org/10.1002/cplu.202000306. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-828039.html)

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Chemical sciences

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Zhao, H; Roy, JC; Al-Mamun, M; Yin, H; Dou, Y; Zhang, L; Liu, P; Wang, Y; Zhong, YL, Phosphorus and Sulfur Co‐Doped Cobaltous Oxide Synthesized by an Inorganic‐Salt‐Assisted Method: Reaction Mechanism and Electrocatalytic Application, ChemPlusChem

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