title: N,P-Codoped Carbon Networks as Efficient Metal-free Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution Reactions.
abstract: The high cost and scarcity of noble metal catalysts, such as Pt, have hindered the hydrogen production from electrochemical water splitting, the oxygen reduction in fuel cells and batteries. Herein, we developed a simple template-free approach to three-dimensional porous carbon networks codoped with nitrogen and phosphorus by pyrolysis of a supermolecular aggregate of self-assembled melamine, phytic acid, and graphene oxide (MPSA/GO). The pyrolyzed MPSA/GO acted as the first metal-free bifunctional catalyst with high activities for both oxygen reduction and hydrogen evolution. Zn-air batteries with the pyrolyzed MPSA/GO air electrode showed a high peak power density (310 W g(-1) ) and an excellent durability. Thus, the pyrolyzed MPSA/GO is a promising bifunctional catalyst for renewable energy technologies, particularly regenerative fuel cells.
authors.affiliation: Center of Advanced Science and Engineering for Carbon (Case4carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA.|Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
authors.forename: Jintao
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, China.
authors.forename: Liangti
authors.initials: L
authors.lastname: Qu
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing, 100084, China.
authors.forename: Gaoquan
authors.initials: G
authors.lastname: Shi
authors.affiliation: Center of Advanced Science and Engineering for Carbon (Case4carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA.|State Key Laboratory of Organic-Inorganic Composites, BUCT-CWRU International Joint Laboratory, College of Energy, Beijing University of Chemical Technology, Beijing, 100084, China.
authors.forename: Jiangyong
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, BUCT-CWRU International Joint Laboratory, College of Energy, Beijing University of Chemical Technology, Beijing, 100084, China.
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Chen
authors.affiliation: Center of Advanced Science and Engineering for Carbon (Case4carbon), Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA. liming.dai@case.edu.|State Key Laboratory of Organic-Inorganic Composites, BUCT-CWRU International Joint Laboratory, College of Energy, Beijing University of Chemical Technology, Beijing, 100084, China. liming.dai@case.edu.
authors.forename: Liming
authors.initials: L
authors.lastname: Dai
keywords: Zn-air battery; electrocatalyst; graphitic carbon; hydrogen evolution; oxygen reduction