纳米笼
催化作用
电催化剂
过氧化氢
法拉第效率
化学
吸附
无机化学
碳纤维
解吸
材料科学
电化学
物理化学
有机化学
电极
复合数
复合材料
作者
Nan Jia,Ting Yang,Shufeng Shi,Xinbing Chen,Zhongwei An,Yu Chen,Shiwei Yin,Pei Chen
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-02-04
卷期号:8 (7): 2883-2891
被引量:74
标识
DOI:10.1021/acssuschemeng.9b07047
摘要
Exploiting efficient electrocatalysts for hydrogen peroxide (H2O2) electroproduction by oxygen reduction reaction (ORR) is highly desired in practical application. Herein, nitrogen- and fluoride-codoped carbon nanocages (NF-Cs) are successfully synthesized through a simple and scalable template method. With the aid of a porous structure, a large surface area, and the introduction of N and F atoms, NF-Cs show excellent electrocatalytic performance for H2O2 electroproduction in alkaline solution (pH 13) with a faradaic efficiency of 89.6% at very positive applied potential (0.74 V). In acid solution (pH 0.35), the faradaic efficiency of H2O2 electroproduction stably maintains at 85%–88% in the range of 0.4–0.72 V potential. The experimental and theoretical results reveal that the strong synergistic effect between the doped N and F atoms facilitate the H2O2 electroproduction through 2e ORR. That is, the doped N atoms promote O2 molecule adsorption on the catalyst surface, and the F atoms facilitate the desorption of the *OOH intermediate, which is the key factor for the NF-Cs efficiently catalyzing H2O2 electroproduction. These results provide beneficial references for reasonably designing effective carbon-based electrocatalysts for H2O2 electroproduction.
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