Premium
Meso‐macroporous Carbons Decorated with Ample Nitrogen Sites as Bifunctional Catalysts in CO 2 Catalytic Conversion and Oxygen Reduction Reaction
Author(s) -
Liu Jing,
Shan Xinggang,
Wang Gangqiang,
Kong Weiping
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100304
Subject(s) - catalysis , bifunctional , electrocatalyst , electrolyte , carbon fibers , methanol , nitrogen , chemistry , oxygen , materials science , chemical engineering , bet theory , inorganic chemistry , electrochemistry , electrode , organic chemistry , composite material , composite number , engineering
Electrocatalysts are vulnerable for poisoning during the process of oxygen reduction reaction (ORR), even the air containing traces of acidic CO 2 gas, leading to low activity and durability in fuel cells. Herein, an anti‐CO 2 poisoning metal‐free carbon ORR catalysts were derived from fructose and g ‐C 3 N 4 , along with NaCl as both pore‐forming template and structure protective agent, conducting to a three‐dimensional meso‐macroporous carbon (3D‐NHPC‐x) architecture with large BET surface areas (479∼753 m 2 /g), ultrahigh nitrogen doping level (14.7 wt %∼16.5 wt %) and high ratios of pyridinic and pyrrolic characteristics. The samples were designated as 3D‐NHPC‐x, and the absorbed CO 2 electrocatalyst shows a half‐wave potential of 0.76 V (vs. RHE) in alkaline electrolyte with robust long‐term stability and methanol tolerance, which may provide a facile route of producing high‐performance and anti‐CO 2 poisoning ORR catalyst. The 3D‐NHPC‐x can also be employed as efficient catalysts in CO 2 capture and catalytic conversion to cyclic carbonate, superior to various materials used in the field. This work develops green and sustainable route for preparation of efficient and anti‐CO 2 poisoning hierarchical porous carbon based ORR catalysts.