利用简单的搅拌将铁掺杂入NiMoO4纳米管,得到Ni1-xFexMoO4纳米管,将其作为电催化析氧催化剂,表现出比纯NiMoO4纳米管优异的多的活性,特别是Ni0.75Fe0.25MoO4纳米管催化剂性能最为优异,超过了绝大多数钼酸镍催化剂。结果表明:Ni0.75Fe0.25MoO4纳米管催化剂在电流密度10mA/cm2下只需要253mV的过电势,塔菲尔斜率只有41mV/dec,比贵金属催化剂IrO2更加优异,而且其具有良好的时间电流稳定性。Ni0.75Fe0.25MoO4纳米管催化剂优异的催化活性和超强的稳定性让其有可能应用在大规模电催化上。
The porous Fe-doped NiMoO4 nanotube were fabricated hierarchically through room-temperature Fe atoms incorporation and subsequent thermal treatment under air atmosphere.The Fe-doped NiMoO4 nanotube exhibited much better electrocatalytic activity for the oxygen evolution reaction(OER) than single-phase.Typically,the Ni0.75Fe0.25MoO4 shown performance favorably comparable to the state of the NiMoO4 OER catalysts recently reported.To drive a current density of 10mA/cm2,the Ni0.75Fe0.25MoO4 catalyst only required an overpotential of 253mV,and the tafel slope of Ni0.75Fe0.25MoO4 was only 41mV/dec,which was comparable to the integrated performance of commercial IrO2.Furthermore,the Ni0.75Fe0.25MoO4 catalyst showed a stable performance operated at the long-term test.The superior activity and long-term stability demonstrated that the hierarchical Ni0.75Fe0.25MoO4 nanotube catalyst had promising potential for application in large-scale water splitting.
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