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- Title
Phosphorus and Sulfur Co-Doped Cobaltous Oxide Synthesized by an Inorganic-Salt-Assisted Method: Reaction Mechanism and Electrocatalytic Application.
- Authors
Roy, Jagadish Chandra; Al-Mamun, Mohammad; Yin, Huajie; Yuhai Dou; Lei Zhang; Porun Liu; Yun Wang; Yu Lin Zhong; Huijun Zhao
- Abstract
An inorganic-salt-assisted synthesis of non-metallic heteroatom (phosphorus and sulfur) co-doped cobaltous oxide (P/S-CoO) has been reported. Potassium sulphate (K2SO4) was used as inorganic source of sulfur (S), while triphenyl phosphine (PPh3) was used as phosphorus (P) source. A stepwise mechanistic investigation into the doping process revealed that the decomposition of PPh3 triggered the release of both the elemental sulfur and phosphorus because of the reducing reaction environment. The transformation of cobalt-PPh3 complex into cubic cobalt (II) oxide along with the successful codoping (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/cm2 at the overpotential of 293 mV in 1.0 M KOH electrolyte and profound stability at different current densities.
- Subjects
HYDROGEN evolution reactions; SULFUR; PHOSPHORUS; CRYSTAL structure; DENSITY currents; OXIDES
- Publication
ChemPlusChem, 2020, Vol 85, Issue 7, p1602
- ISSN
2192-6506
- Publication type
Article
- DOI
10.1002/cplu.202000306