期刊
CHEMICAL ENGINEERING JOURNAL
卷 408, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127352
关键词
Metal-organic framework; Electrocatalysis; Oxygen evolution reaction; Mo doping; Metal oxides
资金
- National Natural Science Foundation of China [21671039, 21673241]
- Natural Science Foundation of Fujian Province [2015 J01038]
- New Century Excellent Talents in Fujian Province University
- State Key Laboratory of Structural Chemistry
- Program for Innovative Research Team in Science and Technology in Fujian Province University (IRTSTFJ)
This study developed Mo-doped Co3O4 nanoparticles-coated carbon nanotubes with superior oxygen evolution reaction (OER) activity and durability, which can efficiently produce hydrogen at low voltages.
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 electrocatalyst. The outstanding OER performance is mainly attributed that Mo doping modulates the electronic properties and structures of Co3O4, which bring out high proportion of Co2+ active sites, large specific surface area, more electrophilic Co ions and favorable interfacial charge transfer. This work highlights the modification effects of high-valence metal ions on the structures of the electrocatalysts for improving OER performance.
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