Joule Heating-Driven sp2-C Domains Modulation in Biomass Carbon for High-Performance Bifunctional Oxygen Electrocatalysis

Abstract Natural biomass-derived carbon material is one promising alternative to traditional graphene-based catalyst for oxygen electrocatalysis. However, their electrocatalytic performance were constrained by the limited modulating strategy. Herein, using N-doped commercial coconut shell-derived activated carbon (AC) as catalyst model, the controllably enhanced sp 2 -C domains, through an flash Joule heating process, effectively improve the edge defect density and overall graphitization degree of AC catalyst, which tunes the electronic structure of N configurations and accelerates electron transfer, leading to excellent oxygen reduction reaction performance (half-wave potential of 0.884 V RHE , equivalent to…

• NF
  Nanjing Forestry University
• NN
  National Natural Science Foundation of China

  Awards: 32371810, 202101
• CP
  China Postdoctoral Science Foundation

  Award: 2023M731702
• GO
  Government of Jiangsu Province
• JP
  Jiangsu Province Biomass Energy and Material Laboratory

  Award: JSBEM-S-202101
• NK
  National Key Research and Development Program of China

  Award: 2023YFB4203702
• FR
  Foundation Research Project of Jiangsu Province

  Awards: JSBEM-S-202101, BK20221338