Anion-tuned nickel chalcogenides electrocatalysts for efficient 2e- ORR towards H2O2 production in acidic media

作者：Sun, Qingjia; Xu, Guanxing; Xiong, Bingyan; Chen, Lisong^*; Shi, Jianlin^*

来源：Nano Research, 2023, 16(4): 4729-4735.

DOI：10.1007/s12274-022-5160-2

• hydrogen peroxide
• oxygen reduction reaction
• electrosynthesis
• anions

Electrocatalytic 2e(-) oxygen reduction reaction (2e(-) ORR) is a promising approach to producing H2O2 at ambient temperature and pressure especially in acidic media, which, however, is hindered by the high cost of precious metal-based electrocatalysts. Hence, the development of efficient earth-abundant electrocatalysts and reaction mechanism exploration for H2O2 production by 2e(-) ORR in acidic solution are critically important but remain challenging at present. In this work, NiSe2 has been developed as a novel and high-performance 2e(-) ORR electrocatalyst in acidic media, moreover, using nickel chalcogenides as the models, the influence of different anion species (Se-2(2-), S-2(2-), and O-2(-)) on 2e(-) ORR electrocatalytic performance of the catalysts has been investigated. The synthesized NiSe2 exhibits outstanding 2e(-) ORR performance of high selectivity (90%) and long-term durability (12 h). The maximum H2O2 concentration of NiSe2 reaches 988 ppm, which is the highest among all the reported transition metal chalcogenides. This work demonstrates a novel point of view in anion tuning for designing high-efficiency transition-metal-based electrocatalysts for 2e(-) ORR.

• 单位
  中国科学院