title: High-yield electrosynthesis of hydrogen peroxide from oxygen reduction by hierarchically porous carbon.
abstract: H2O2 production by electroreduction of O2 is an attractive alternative to the current anthraquinone process, which is highly desirable for chemical industries and environmental remediation. However, it remains a great challenge to develop cost-effective electrocatalysts for H2O2 synthesis. Here, hierarchically porous carbon (HPC) was proposed for the electrosynthesis of H2O2 from O2 reduction. It exhibited high activity for O2 reduction and good H2O2 selectivity (95.0-70.2%, most of them >90.0% at pH 1-4 and >80.0% at pH 7). High-yield H2O2 generation has been achieved on HPC with H2O2 concentrations of 222.6-62.0 mmol L(-1) (2.5 h) and corresponding H2O2 production rates of 395.7-110.2 mmol h(-1)  g(-1) at pH 1-7 and -0.5 V. Moreover, HPC was energy-efficient for H2O2 production with current efficiency of 81.8-70.8%. The exceptional performance of HPC for electrosynthesis of H2O2 could be attributed to its high content of sp(3)-C and defects, large surface area and fast mass transfer.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024 (China).
authors.forename: Yanming
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024 (China). quanxie@dlut.edu.cn.
authors.forename: Xie
authors.initials: X
authors.lastname: Quan
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024 (China).
authors.forename: Xinfei
authors.initials: X
authors.lastname: Fan
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024 (China).
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024 (China).
authors.forename: Shuo
authors.initials: S
authors.lastname: Chen
keywords: electrocatalysis; electrochemistry; hydrogen peroxide synthesis; oxygen reduction; porous carbon