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碳纳米管上POM辅助的MOF衍生的Mo掺杂的Co掺杂的Co 3 O 4纳米粒子的涂层,以改善氧释放反应
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2020-10-15 , DOI: 10.1016/j.cej.2020.127352
Kanglong Lu , Tengteng Gu , Linjie Zhang , Zhicheng Wu , Ruihu Wang , Xiaoju Li

Endowing noble-metal-free electrocatalysts with superior oxygen evolution reaction (OER) activity is essential in water electrolysis for massive and cost-effective production of hydrogen fuels. Here, we presented Mo-doped Co3O4 nanoparticles-coated carbon nanotubes (Mo-Co3O4/CNTs), which were fabricated through pyrolysis of CNTs-stringed ZIF-67 with the doping of phosphomolybdic acid. The as-prepared Mo-Co3O4/CNTs exhibits high OER activity and strong durability with the onset potential of 1.42 V and almost constant low overpotential of 280 mV at 10 mA cm-2, which outcompete the benchmark IrO2电催化剂。优异的OER性能主要归因于Mo掺杂对Co 3 O 4的电子性质和结构的调节,从而带出了高比例的Co 2+活性位,大的比表面积,更多的亲电子Co离子和良好的界面电荷转移。这项工作强调了高价金属离子对电催化剂结构的改性作用,以改善OER性能。





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更新日期:2020-10-16
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