Defect Chemistry of Nonprecious-Metal Electrocatalysts for Oxygen Reactions

Advanced Materials
Dafeng YanShuangyin Wang

Abstract

Oxygen electrocatalysis, including the oxygen-reduction reaction (ORR) and oxygen-evolution reaction (OER), is a critical process for metal-air batteries. Therefore, the development of electrocatalysts for the OER and the ORR is of essential importance. Indeed, various advanced electrocatalysts have been designed for the ORR or the OER; however, the origin of the advanced activity of oxygen electrocatalysts is still somewhat controversial. The enhanced activity is usually attributed to the high surface areas, the unique facet structures, the enhanced conductivities, or even to unclear synergistic effects, but the importance of the defects, especially the intrinsic defects, is often neglected. More recently, the important role of defects in oxygen electrocatalysis has been demonstrated by several groups. To make the defect effect clearer, the recent development of this concept is reviewed here and a novel principle for the design of oxygen electrocatalysts is proposed. An overview of the defects in carbon-based, metal-free electrocatalysts for ORR and various defects in metal oxides/selenides for OER is also provided. The types of defects and controllable strategies to generate defects in electrocatalysts are presented, along wi...Continue Reading

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Citations

Oct 17, 2017·Chemical Communications : Chem Comm·Peng ZhouShuangyin Wang
Nov 2, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Lili YaoCheng Wang
Aug 16, 2017·Physical Chemistry Chemical Physics : PCCP·Dongyoon ShinJaeyoung Lee
Sep 25, 2018·Chemical Society Reviews·Xuecheng YanXiangdong Yao
Nov 10, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Junying HeShuangyin Wang
Oct 12, 2018·Chemistry : a European Journal·Mo Qiao, Maria-Magdalena Titirici
Dec 28, 2018·Advanced Materials·Zhengping ZhangFeng Wang
Jan 25, 2019·Chemical Communications : Chem Comm·Chao MengYue Zhou
Jan 29, 2019·Advanced Materials·Chuangang HuLiming Dai
Dec 12, 2018·Chemistry : a European Journal·Dekun WuYuhan Sun
Apr 2, 2019·Chemical Communications : Chem Comm·Ling ZhangXuping Sun

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