• 文献标题:   Metal and Nonmetal Codoped 3D Nanoporous Graphene for Efficient Bifunctional Electrocatalysis and Rechargeable Zn-Air Batteries
  • 文献类型:   Article
  • 作  者:   QIU HJ, DU P, HU KL, GAO JJ, LI HL, LIU P, INA T, OHARA K, ITO Y, CHEN MW
  • 作者关键词:   freestanding, heteroatom doping, nanoporous graphene, singleatom catalyst
  • 出版物名称:   ADVANCED MATERIALS
  • ISSN:   0935-9648 EI 1521-4095
  • 通讯作者地址:   Harbin Inst Technol
  • 被引频次:   70
  • DOI:   10.1002/adma.201900843
  • 出版年:   2019

▎ 摘  要

Developing bifunctional electrocatalysts with high activities and long durability for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial toward the practical implementation of rechargeable metal-air batteries. Here, a 3D nanoporous graphene (np-graphene) doped with both N and Ni single atoms/clusters is reported. The predoping of N by chemical vapor deposition (CVD) dramatically increases the Ni doping amount and stability. The resulting N and Ni codoped np-graphene has excellent electrocatalytic activities for both the ORR and the OER in alkaline aqueous solutions. The synergetic effects of N and Ni dopants are revealed by density functional theory calculations. The free-standing Ni, N codoped 3D np-graphene shows great potential as an economical catalyst/electrode for metal-air batteries.