Home
Resources
Publications
Engineering the Surface Metal Active Sites of Nickel Cobalt Oxide Nanoplates Toward Enhanced Oxygen Electrocatalysis for Zn-Air Battery

Engineering the Surface Metal Active Sites of Nickel Cobalt Oxide Nanoplates Toward Enhanced Oxygen Electrocatalysis for Zn-Air Battery

Jun Zhao, Yu He, Zelin Chen, Xuerong Zheng, Xiaopeng Han, Dewei Rao, Cheng Zhong, Wenbin Hu, Yida Deng

ACS Appl Mater Interfaces. 2019 Feb 6;11(5):4915-4921.

PMID: 30537808

Abstract:

Clarifying and controlling the surface catalytic active sites is at the heart of developing low-cost effective bifunctional oxygen catalysts to replace precious metals for metal-air batteries. Herein, a shape-control of hexagon nickel cobalt oxide spinel nanosheets was reported to engineer the surface metal active sites for enhanced electrocatalysis of oxygen evolution and oxygen reduction reactions (OER/ORR). Specifically, through simply tuning annealing temperature, different Ni3+/Ni2+ and Co3+/Co2+ atomic configurations on the nickel cobalt oxide surface were controllably synthesized. Electrochemical results show that the oxide treated at 250 °C (NCO-250) with the highest value of Ni3+/Ni2+ sites and the lowest value of Co3+/Co2+ sites exhibits superior OER/ORR activity in alkaline electrolytes and better discharge/charge performance in Zn-air batteries among all the samples. The optimized surface active site configuration of the NCO-250 sample leads to the optimal energy of adsorption, activation, and desorption for water molecules and oxygen species, thus promoting a high electrocatalytic activity. This work provides a strategy to design cost-effective, highly active, and durable electrocatalysts through regulating active sites on transition-metal surface for Zn-air battery and other advanced energy devices.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP58591450	Nickel cobalt oxide		58591-45-0	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: