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Highly Efficient Porous Carbon Electrocatalyst with Controllable N‐Species Content for Selective CO 2 Reduction
Author(s) -
Ye Lin,
Ying Yiran,
Sun Dengrong,
Zhang Zhouyang,
Fei Linfeng,
Wen Zhenhai,
Qiao Jinli,
Huang Haitao
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201912751
Subject(s) - electrocatalyst , calcination , faraday efficiency , electrolyte , carbon fibers , porosity , noble metal , chemical engineering , catalysis , metal organic framework , chemistry , materials science , metal , inorganic chemistry , electrochemistry , electrode , organic chemistry , adsorption , composite number , composite material , engineering
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 CO 2 reduction reaction (CO 2 RR). 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 CO 2 RR. The NPC exhibits superior CO 2 RR 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 CO 2 RR electrocatalysts. This work advances an effective and facile way towards highly active and cost‐effective alternatives to noble‐metal CO 2 RR electrocatalysts for practical applications.