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Composite Electrocatalyst Derived from Hybrid Nitrogen‐Containing Metal Organic Frameworks and g‐C 3 N 4 Encapsulated In Situ into Porous Carbon Aerogels
Author(s) -
Zhu Hong,
Chen Minglin,
Li Ke,
Huang Xidai,
Wang Fanghui
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800479
Subject(s) - electrocatalyst , calcination , catalysis , raman spectroscopy , x ray photoelectron spectroscopy , electrochemistry , aerogel , metal organic framework , composite number , rotating disk electrode , materials science , inorganic chemistry , carbon fibers , rotating ring disk electrode , methanol , nitrogen , metal , porosity , chemistry , chemical engineering , electrode , nanotechnology , cyclic voltammetry , composite material , organic chemistry , physics , adsorption , optics , engineering
A novel composite Fe‐bpdc‐C 3 N 4 ‐CA catalyst (where bpdc stands for 2,2′‐bipyridine‐3,3′‐dicarboxylic acid and CA stands for carbon aerogel) with a high nitrogen content was synthesized through the in situ encapsulation of nitrogen‐containing metal organic frameworks along with g‐C 3 N 4 into porous CAs. The characteristics of the catalysts calcined at different temperatures were determined by means of TEM, XRD, Raman spectroscopy, XPS, and BET measurements. The results demonstrate the successful doping of N heteroatoms and the effective formation of Fe‐N X active sites. The electrocatalytic properties were investigated by using rotating disk electrode (RDE) and rotating ring disk electrode (RRDE) measurements. The Fe‐bpdc‐C 3 N 4 ‐CA catalyst calcined at 800 °C exhibits the highest oxygen reduction reaction activity with the initial reduction potential and half‐wave potential reaching 1.09 and 0.96 V, respectively, versus RHE in 0.1 M KOH. It also possesses high stability and follows approximately a complete four‐electron (4e − ) reaction pathway, as commercial Pt/C catalysts do.