• 文献标题:   Bioinspired Synthesis of Reduced Graphene Oxide-Wrapped Geobacter sulfurreducens as a Hybrid Electrocatalyst for Efficient Oxygen Evolution Reaction
  • 文献类型:   Article
  • 作  者:   KALATHIL S, KATURI KP, ALAZMI AS, PEDIREDDY S, KORNIENKO N, COSTA PMFJ, SAIKALY PE
  • 作者关键词:  
  • 出版物名称:   CHEMISTRY OF MATERIALS
  • ISSN:   0897-4756 EI 1520-5002
  • 通讯作者地址:   King Abdullah Univ Sci Technol
  • 被引频次:   16
  • DOI:   10.1021/acs.chemmater.9b00394
  • 出版年:   2019

▎ 摘  要

Doping/decorating of graphene or reduced graphene oxide (rGO) with heteroatoms provides a promising route for the development of electrocatalysts which will be useful in many technologies, including water splitting. However, current doping approaches are complicated, not eco-friendly, and not cost-effective. Herein, we report the synthesis of doped/decorated rGO for oxygen evolution reaction (OER) using a simple approach that is cost-effective, sustainable, and easy to scale up. The OER catalyst was derived from the reduction of GO by an exo-electron-transferring bacterium, Geobacter sulfurreducens. Various analytical tools indicate that OER active elements such as Fe, Cu, N, P, and S decorate the rGO flakes. The hybrid catalyst (i.e., Geobacter/rGO) produces a geometric current density of 10 mA cm(-2) at an overpotential of 270 mV versus the reversible hydrogen electrode with a Tafel slope of 43 mV dec(-1) and possesses high durability, as evidenced through 10 h of stability testing. Electrochemical analyses suggest the importance of Fe and its possible role as an active site for OER Overall, this work represents a simple approach toward the development of an earth abundant, eco-friendly, and highly active OER electrocatalyst for various applications such as solar fuel production, rechargeable metal-air batteries, and microbial electrosynthesis.