电合成
电催化剂
电化学
臭氧
析氧
法拉第效率
过氧化氢
选择性
电解
材料科学
化学
氧气
降级(电信)
化学工程
催化作用
光化学
电极
物理化学
有机化学
电解质
电信
计算机科学
工程类
作者
Lei Ding,Wenwen Li,Ming Xue,Xiaoge Peng,Huaijie Shi,Jia Liu,Xiaosa Wang,Chenghang Jiang,Yufeng Xue,Shibin Wang,Xing Zhong,Jianguo Wang
出处
期刊:Authorea - Authorea
日期:2023-08-24
标识
DOI:10.22541/au.169284076.64803783/v1
摘要
Electrochemical synthesis of green oxidants O and HO is valuable for applications, but challenges persist in enhancing the O and HO generation activity and combined application. Herein, we modulate the surface Ni active sites and oxygen vacancy defects content in Ni-Sb-SnO electrocatalysts to enhance selectivity for electrochemical ozone generation (EOP) and two-electron electrochemical oxygen reduction reactions (2e⁻ ORR). The Ni active sites and oxygen vacancy defects enriched electrocatalysts resulting in an ozone faradaic efficiency of 48.1%, while non-enriched electrocatalyst obtained 90% selectivity for HO. Theoretical calculations revealed that Ni-Sb-SnO efficiently captures O with defective O stabilize intermediates, facilitating O and HO synthesis. Moreover, concerted EOP and 2e⁻ ORR enable concurrent generation of O and HO for efficient synergistic degradation of organic pollutants, while attenuating the energy demands of the electrolyzer. This study provides an appealing strategy for the simultaneous production of O and HO with applications in wastewater treatment.
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