• 文献标题:   Stable and highly efficient Co-Bi nanoalloy decorated on reduced graphene oxide (Co-Bi@rGO) anode for formaldehyde and urea oxidation reactions
  • 文献类型:   Article
  • 作  者:   MUNDE AV, MULIK BB, DIGHOLE RP, SATHE BR
  • 作者关键词:   reduced graphene oxide, cobi@rgo nanoelectrode, urea formaldehyde oxidation, hydrogen generation reaction
  • 出版物名称:   MATERIALS CHEMISTRY PHYSICS
  • ISSN:   0254-0584 EI 1879-3312
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.matchemphys.2022.126843 EA OCT 2022
  • 出版年:   2022

▎ 摘  要

Extremely energetic and low-cost novel nanoelectrodes for fuel cell reactions are always important for examining more elaborative electrochemical studies at interfacial electron transfer reactions. Herein, this work demon-strated a bifunctional electrocatalyst with its oxophilic character and promoting the role of p-electrons of Bi to be supported with Co (nanoalloy) and further decoration on reduced graphene oxide i.e. Co-Bi@rGO presenting as an auspicious electrochemical activity towards formaldehyde and urea oxidation reactions. Synthesized Co-Bi@rGO composite have been well characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), BET surface area measurement, and X-ray photoelectron spectroscopy (XPS) studies, etc. Further, the electrochemical evaluation shows exceptionally higher activity towards formaldehyde and urea oxidation reactions having onset potential of 0.32 V, 0.35 V vs. SCE respectively. Interestingly, ultra-high enhancement factor for Co-Bi@rGO could be initiated from the cooperative role of Bi with Co centres, assist-ing for formaldehyde and urea oxidation reactions. Electrochemical impedance spectroscopy (EIS) and chro-noamperometry (i-t) studies using Co-Bi@rGO nanocomposite shows excellent long-term current/potential stability with lower charge transfer resistance towards the formaldehyde and urea molecules. This work deals with practical information for the build of a stable and proficient electrocatalyst for direct formaldehyde and urea fuel cells and also will extendable towards the industrial waste water treatment.