Amorphous NiO electrocatalyst overcoated ZnO nanorod photoanodes for enhanced photoelectrochemical performance
Amorphous NiO electrocatalyst overcoated ZnO nanorod photoanodes for enhanced photoelectrochemical performance
复制标题
非晶态 NiO 电催化剂涂层 ZnO 纳米棒光阳极可增强光电化学性能
DOI：
10.1039/c5nj01815c
复制
发表时间：
2016-01-01
影响因子：
3.3
通讯作者：
Liang, Erjun
中科院分区：
文献类型：
--
作者：
Mao, Yanchao;Cheng, Yongguang;Liang, Erjun
开发高性能光电阳极对于光电化学（PEC）水分解的实际应用至关重要。在这项工作中，我们证明了在 ZnO 纳米棒 (NR) 光阳极表面引入非晶 NiO 电催化剂可以大大提高其 PEC 性能。 NiO/ZnO核壳NR阵列是通过两步电沉积和退火获得的。单晶 ZnO NR 半导体核上的非晶 NiO 纳米片电催化剂壳形成了用于 PEC 水分解的复合光电阳极配置。与裸 ZnO 光阳极相比，NiO/ZnO 光阳极在水氧化起始电位方面产生了显着的 260 mV 阴极漂移。 NiO/ZnO光阳极的最高PEC效率为1.81%，比ZnO光阳极（0.06%）高30倍。这项研究表明，引入非晶态 NiO 电催化剂可以大大提高 ZnO 光阳极的 PEC 性能。
Developing high-performance photoanodes is essential for practical applications of photoelectrochemical (PEC) water splitting. In this work, we demonstrated that introducing amorphous NiO electrocatalysts onto the surface of ZnO nanorod (NR) photoanodes can largely improve their PEC performance. The NiO/ZnO core–shell NR arrays were obtained by two step electrodepositions and annealing. The amorphous NiO nanosheet electrocatalyst shell on a single crystalline ZnO NR semiconductor core formed a composite photoanode configuration for PEC water splitting. The NiO/ZnO photoanode yielded a remarkable 260 mV cathodic shift in the onset potential for water oxidation compared to the bare ZnO photoanode. And the highest PEC efficiency of the NiO/ZnO photoanode was found to be 1.81%, which is 30 times higher than that of the ZnO photoanode (0.06%). This research demonstrates that introducing amorphous NiO electrocatalysts can largely improve the PEC performance of ZnO photoanodes.