• 文献标题:   Plasmonic Ag/N-doped Graphene Nanoflakes as Electrocatalyst for Oxygen Reduction Reaction Enhanced by Solar Energy
  • 文献类型:   Article
  • 作  者:   WANG ZH, GONG C, LI GF, CHEN YJ, SUI LN, DONG LF
  • 作者关键词:  
  • 出版物名称:   ECS JOURNAL OF SOLID STATE SCIENCE TECHNOLOGY
  • ISSN:   2162-8769 EI 2162-8777
  • 通讯作者地址:   Qingdao Univ Sci Technol
  • 被引频次:   0
  • DOI:   10.1149/2162-8777/abba05
  • 出版年:   2020

▎ 摘  要

Plasmonic Ag nanoparticles have strong spectral absorption in ultraviolet and visible light due to unique localized surface plasmon resonance effects. Meanwhile, nitrogen-doped graphene (NG) incorporates nitrogen (N) atoms into graphene lattice through a hydrothermal process, thereby providing active oxygen reduction reaction (ORR) sites. Herein, N-doped graphene decorated with plasmonic Ag nanoparticles (Ag/NG) is synthesized and utilized as ORR catalyst. The ORR performance of Ag/NG greatly exceeds that of pure NG. Its half-wave potential is 0.86 V, exceeding that of commercial Pt/C (0.83 V). Under the AM 1.5G simulated sunlight, Ag/NG demonstrates photo-enhanced electrocatalytic performance with right shifting of onset potential and half-wave potential. In this case, the half-wave potential increases by 10 mV, while the current density also rises significantly. Therefore, the Ag/NG composite provides a potential strategy for the development of solar-enhanced electrocatalysts for fuel cells and metal-air batteries.