Phosphorus and Sulfur Co-Doped Cobaltous Oxide Synthesized by an Inorganic-Salt-Assisted Method: Reaction Mechanism and Electrocatalytic Application.,ChemPlusChem

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Phosphorus and Sulfur Co-Doped Cobaltous Oxide Synthesized by an Inorganic-Salt-Assisted Method: Reaction Mechanism and Electrocatalytic Application.
ChemPlusChem ( IF 3.0 ) Pub Date : 2020-07-06 , DOI: 10.1002/cplu.202000306
Jagadish Chandra Roy ₁ , Mohammad Al-Mamun ₁ , Huajie Yin ₁ , Yuhai Dou ₁ , Lei Zhang _{1,

2} , Porun Liu ₁ , Yun Wang ₁ , Yu Lin Zhong ₁ , Huijun Zhao _{1,

2}

Affiliation

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 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/cm² at the overpotential of 293 mV in 1.0 M KOH electrolyte and profound stability at different current densities.

中文翻译：

无机盐辅助法合成的磷硫共掺杂氧化钴：反应机理及电催化应用。

据报道，无机盐辅助合成了非金属杂原子（磷和硫）共掺杂的氧化钴（P / S-CoO）。硫酸钾（K ₂ SO ₄）被用作无机硫（S），而三苯基膦（PPh ₃）被用作磷（P）源。对掺杂过程的逐步机理研究表明，由于反应环境的还原，PPh ₃的分解触发了元素硫和磷的释放。钴-PPh ₃的转化通过在800°C的高温煅烧，可将其复杂地合成为立方氧化钴（II）和成功的共掺杂（P和S），但保留了整体的CoO晶体结构。所合成的P / S-CoO与原始CoO相比，在1.0 M KOH电解液中的293 mV超电势下的电流密度为10 mA / cm ²时，显示出比原始CoO更高的放氧活性，并且在不同电流下具有很强的稳定性密度。

更新日期：2020-07-30

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