Synergistic electrocatalysis of N,Nʹ-bis(salicylidene)-ethylenediamine-cobalt(II) and conductive carbon black (BP) for high efficient CO2 electroreduction

Yishu Fu, Yo Ryu, Yanan Li, Jing Li, Jinli Qiao, Jiujun Zhang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Gas diffusion electrodes (GDEs) modified with N,Nʹ-Bis(salicylidene)-ethylenediamine-cobalt(II) (Cosalen) and conductive carbon black (BP) have been prepared. It is demonstrated that modified BP-Cosalen/GDE electrode is able to catalyze CO2 reduction in a more efficient and selective manner than that of bulk Cosalen/GDE in 0.5 M KHCO3 solution. In the presence of 60 wt% of BP, the as-prepared BP-Cosalen/GDE electrode exhibits the highest activity for catalyzing CO2 reduction reaction, wherever increase or decrease the amount of BP do not benefit to CO2 reduction. Compared to other BP-Cosalen/GDE electrodes, the BP-Cosalen/GDE60 shows the most positive onset potential, and the maximum current density reaches 21 mA cm−2. The improved catalytic activity is largely due to the excellent electrical conductivity and the developed pore structure of BP which provides more active phases for the electrochemical reduction of CO2. Further analysis of reduction product reveals that the product on BP-Cosalen/GDE60 electrode is formate in 0.5 M KHCO3 electrolyte. The highest faradaic efficiency reached 27 % along with the production rate of formate as much as 0.44 mM.

Original languageEnglish
Pages (from-to)3355-3363
Number of pages9
JournalJournal of Solid State Electrochemistry
Volume19
Issue number11
DOIs
Publication statusPublished - 2015 Nov 1

Keywords

  • Catalytic activity
  • Electrochemical reduction of CO
  • Formic acid
  • Gas diffusion electrode
  • Onset potential

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry
  • Electrical and Electronic Engineering

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