Core-Shell NiO@Ni-P Hybrid Nanosheet Array for Synergistically Enhanced Oxygen Evolution Electrocatalysis: Experimental and Theoretical Insights

Shuai Hao; Ninghua Chen; Qin Liu; Ying Xie; Honggang Fu; Yingchun Yang

doi:10.1002/asia.201800033

Core-Shell NiO@Ni-P Hybrid Nanosheet Array for Synergistically Enhanced Oxygen Evolution Electrocatalysis: Experimental and Theoretical Insights

Chem Asian J. 2018 Apr 16;13(8):944-949. doi: 10.1002/asia.201800033. Epub 2018 Mar 23.

Authors

Shuai Hao¹, Ninghua Chen¹, Qin Liu¹, Ying Xie², Honggang Fu², Yingchun Yang¹

Affiliations

¹ College of Resources and Evironment, Chengdu University of Information Technology, Chengdu, 610225 Sichuan, China.
² Laboratory of Functional Inorganic Material Chemistry, Heilongjiang University, Harbin, 150080, Heilongjiang, China.

PMID: 29508950
DOI: 10.1002/asia.201800033

Abstract

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^-2 , 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.

Keywords: density functional calculations; nanosheet arrays; oxygen evolution reaction; synergistic effect; water oxidation electrocatalysis.