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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Hydrothermal synthesis of delafossite CuScO2 hexagonal plates as an electrocatalyst for the alkaline oxygen evolution reaction
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Hydrothermal synthesis of delafossite CuScO2 hexagonal plates as an electrocatalyst for the alkaline oxygen evolution reaction

机译:Delafossite Cusco2六边形板的水热合成作为碱性氧气进化反应的电催化剂

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摘要

In recent years, substantial efforts have been devoted to investigating the electrocatalytic activity of transition metal oxide catalysts, especially delafossite oxides have been proved to exhibit remarkable activity toward the oxygen evolution reaction (OER). Herein, the electrocatalytic activity and stability of CuScO2 hexagonal plates (around 3-4 mu m) for the OER in alkaline solution were investigated. The micron sized CuScO2 with well-defined hexagonal plate morphology was prepared through a facile hydrothermal method. Moreover, its crystal structure, morphology, surface chemical states, thermal stability, and electrocatalytic performance were studied. The CuScO2 powder exhibits efficient catalytic activity and good long-term stability towards the OER in 1.0 M KOH. An optimal electrode of Ni foam supported CuScO2 powders needs an overpotential of 490 mV to afford a benchmark current density of 10 mA cm(-2) and is able to sustain galvanostatic OER electrolysis for 18 hours with little degradation of 33 mV.
机译:近年来,已经致力于研究过渡金属氧化物催化剂的电催化活性,特别是Delafossite氧化物已被证明对氧气进化反应(Oer)表现出显着的活性。在此,研究了碱液溶液中涂层的甲磺酸的电催化活性和稳定性。通过容易的水热法制料,制备具有明确定义的六边形板形态的微米尺寸的CUSCO2。此外,研究其晶体结构,形态,表面化学状态,热稳定性和电催化性能。 Cusco2粉末在1.0 m KOH中表现出高效的催化活性和良好的长期稳定性。 Ni泡沫的最佳电极由支撑的Cusco2粉末需要490 mV的过电位,得到10 mA cm(-2)的基准电流密度,并且能够在33mV的降解几小时维持镀锌oer电解。

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