CoFeO_(x)/MoO_(2)准平行纳米阵列电极的析氢性能

Hydrogen evolution performance of CoFeO_(x)/MoO_(2) quasi‑parallel nanoarray electrode

利用CoFe层状双金属氢氧化物(CoFe LDH)准平行纳米片阵列作为载体前驱体,通过原位负载及煅烧方式,实现了含有氧空位的MoO_(2)纳米颗粒在纳米片阵列表面的生长。电化学研究结果表明,所得CoFeO_(x)/MoO_(2)纳米阵列电极具有高析氢反应(HER)催化活性。该电极在10和1000 mA·cm^(-2)时的HER过电位分别为40和217 mV。在50 mA·cm^(-2)的电流密度下,该电极可以稳定运行125 h。

Herein,a quasi-parallel CoFe layer double hydroxide(CoFe LDH)nanosheet array was employed as precursor to regulate the deposition of MoO_(2) nanoparticles with abundant oxygen vacancies array by in-situ loading and calcination process.The as-obtained CoFeO_(x)/MoO_(2) nanoarray electrode showed the enhanced hydrogen evolution reaction(HER)activity,while it delivered the current densities of 10 and 1000 mA·cm^(-2) at overpotential of 40 and 217 mV,respectively.Besides,the current density of 50 mA·cm^(-2) for CoFeO_(x)/MoO_(2) electrode was maintained at an overpotential of 100 mV up to 125 h of operation.