Highly Efficient Porous Carbon Electrocatalyst with Controllable N-Species Content for Selective CO2 Reduction

Lin Ye, Yiran Ying, Dengrong Sun, Zhouyang Zhang, Linfeng Fei, Zhenhai Wen, Jinli Qiao, Haitao Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

55 Citations (Scopus)

Abstract

We report a straightforward strategy to design efficient N doped porous carbon (NPC) electrocatalyst that has a high concentration of easily accessible active sites for the CO2 reduction reaction (CO2RR). The NPC with large amounts of active N (pyridinic and graphitic N) and highly porous structure is prepared by using an oxygen-rich metal–organic framework (Zn-MOF-74) precursor. The amount of active N species can be tuned by optimizing the calcination temperature and time. Owing to the large pore sizes, the active sites are well exposed to electrolyte for CO2RR. The NPC exhibits superior CO2RR activity with a small onset potential of −0.35 V and a high faradaic efficiency (FE) of 98.4 % towards CO at −0.55 V vs. RHE, one of the highest values among NPC-based CO2RR electrocatalysts. This work advances an effective and facile way towards highly active and cost-effective alternatives to noble-metal CO2RR electrocatalysts for practical applications.

Original languageEnglish
Pages (from-to)3244-3251
Number of pages8
JournalAngewandte Chemie - International Edition
Volume59
Issue number8
DOIs
Publication statusPublished - 17 Feb 2020

Keywords

  • CO reduction
  • electrocatalysis
  • hierarchically porous materials
  • metal–organic frameworks (MOFs)
  • nitrogen-doped carbon

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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