Novel hexagonal Bi2O2CO3 porous nanoplate/nitrogen-doped graphene nanomaterial enhanced electrochemical properties of oxygen reduction reaction in acidic medium for fuel cells

Xiulan Qin, Ying Huang, Ke Wang, Tingting Xu, Suping Li, Ming Zhao, Yanli Wang, Qian Chen

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

A template-free method is successfully designed to originally synthesize novel porous Bi2O2CO3 hexagonal nanoplate (PBHN) and the Bi2O2CO3 hexagonal nanoplate/nitrogen-doped graphene nanomaterials (PBHN/NG). Notably, PBHN-2 and PBHN/NG-2 have not yet been reported in previous literatures. For the first time, PBHN/NG-2 as the oxygen reduction reaction (ORR) catalyst has been investigated in detail for cathode of fuel cell. The measurement results show that PBHN/NG-2 has exhibited fascinating ORR performances, duo to its orthogonal-layered porous structures from porous Bi2O2CO3 and NG sheets. The values of onset potential and limiting current density for PBHN/NG-2 are 1.179 V and 7.38 mA cm−2 in 0.1 M HClO4 respectively. The PBHN/NG-2 possess small electrochemical impedance and good methanol immunity in 0.1 M HClO4 media. Remarkably, the relative current density of PBHN/NG-2 in acidic electrolyte can still keep 98.58% of its original density after 18000 s durable measurement. Therefore, the PBHN/NG-2 is a promising ORR catalyst to solve the problems of high costs, sluggish ORR kinetics and low durability, applied in fuel cells, metal-air batteries and other renewable energy devices.

Original languageEnglish
Pages (from-to)459-473
Number of pages15
JournalCarbon
Volume152
DOIs
StatePublished - Nov 2019

Keywords

  • Fuel cells
  • Orthogonal-layered porous structures
  • Oxygen reduction reaction
  • Porous BiOCO hexagonal nanoplate

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