Hao Shuai, Chen Ninghua, Liu Qin, Xie Ying, Fu Honggang, Yang Yingchun
College of Resources and Evironment, Chengdu University of Information Technology, Chengdu, 610225 Sichuan, China.
Laboratory of Functional Inorganic Material Chemistry, Heilongjiang University, Harbin, 150080, Heilongjiang, China.
Chem Asian J. 2018 Apr 16;13(8):944-949. doi: 10.1002/asia.201800033. Epub 2018 Mar 23.
Cost-effective and highly-efficient electrocatalysts for the oxygen evolution reaction are crucial for electrolytic hydrogen production. Here, we report core-shell NiO@Ni-P nanosheet arrays as a high-performance 3D catalyst for water oxidation electrocatalysis. Such nanoarrays demand overpotentials of 292 and 350 mV to drive geometrical catalytic current densities of 10 and 100 mA cm , respectively, with an activity superior to its NiO and Ni-P counterparts. Notably, this catalyst also shows a high long-term electrochemical durability with a Faradaic efficiency of 98.1 %. Density functional theory calculation reveals that the superior activity benefits from the synergistic effect between NiO and Ni-P.
用于析氧反应的具有成本效益且高效的电催化剂对于电解水制氢至关重要。在此，我们报道了核壳结构的NiO@Ni-P纳米片阵列作为用于水氧化电催化的高性能三维催化剂。这种纳米阵列分别驱动10和100 mA cm几何催化电流密度时所需的过电位为292和350 mV，其活性优于其NiO和Ni-P对应物。值得注意的是，这种催化剂还表现出高的长期电化学耐久性，法拉第效率为98.1%。密度泛函理论计算表明，其优异的活性得益于NiO和Ni-P之间的协同效应。
