Homogeneous nanosheet Co3O4 film prepared by novel unipolar pulse electro-deposition method for electrochemical water splitting
Homogeneous nanosheet Co3O4 film prepared by novel unipolar pulse electro-deposition method for electrochemical water splitting
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DOI：
10.1039/c5ra12822f
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发表时间：
2015-09
期刊：
影响因子：
3.9
通讯作者：
Xiumin Li;G. Guan;Xiao Du;A. Jagadale;Ji Cao;Xiaogang Hao;Xuli Ma;A. Abudula
中科院分区：
文献类型：
--
作者：
Xiumin Li;G. Guan;Xiao Du;A. Jagadale;Ji Cao;Xiaogang Hao;Xuli Ma;A. Abudula
采用单极脉冲电沉积（UPED）方法在水溶液中碳棒衬底上制备纳米Co3O4薄膜，并与常规的循环伏安法（CV）、恒电位法（PM）和脉冲恒电位法（PPM）进行了比较。UPED法制备的Co3O4膜在碳棒上结构均匀，催化活性高，过电位为275±2.3 mV，在1.0 mol L−1 KOH条件下，析氧反应电流密度为10 mA cm−2。这种优异的性能应归功于其具有蜂窝状形态的高多孔纳米片结构。
A unipolar pulse electro-deposition (UPED) method is used to prepare nanosheet Co3O4 film on a carbon rod substrate in aqueous solution and compared with other conventional methods, i.e., the cyclic voltammetry (CV) method, potentiostatic method (PM) and pulse potentiostatic method (PPM). Co3O4 films prepared by the UPED method show a more uniform structure on carbon rod and higher catalytic activity than those by other methods, and oxygen evolution reaction over it with an overpotential of 275 ± 2.3 mV results in a current density of 10 mA cm−2 in 1.0 mol L−1 KOH. Such an excellent performance should be attributed to its highly porous nanosheet structure with honeycomb-like morphology.