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Self‐Supported Electrocatalysts Derived from Nickel‐Cobalt Modified Polyaniline Polymer for H 2 ‐Evolution and O 2 ‐Evolution Reactions
Author(s) -
Djara Razik,
Masquelez Nathalie,
Lacour MarieAgnès,
Merzouki Abdelhafid,
Cambedouzou Julien,
Cornu David,
Tingry Sophie,
Holade Yaovi
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202001235
Subject(s) - polyaniline , oxygen evolution , catalysis , bimetallic strip , cobalt , nickel , calcination , aniline , materials science , chemical engineering , polymerization , electrocatalyst , polymer , inorganic chemistry , chemistry , electrochemistry , electrode , metallurgy , organic chemistry , composite material , engineering
The water splitting aims to produce H 2 for fuel cells and a number of industrial processes such as the ammonia synthesis and the metals refining. There is actually a major limitation about the development of cost‐effective and efficient electrocatalysts to lower the cell voltage that must be overcome to perform sequentially the overall reaction that is 2H 2 O →2H 2 +O 2 . In the present study, we combined Ni and Co as the promising alternative catalytic metals to Pt‐group metals as well as N and S as the doping elements to fabricate self‐supported electrocatalysts for hydrogen evolution (HER) and oxygen evolution (OER) in alkaline media. To these ends, the polymerization of the aniline into polyaniline (PANI) in the presence of Ni(II) and Co(II) followed by calcination in air resulted in the formation of heterogeneous catalytic materials self‐supported onto a matrix made of C, N, S, Ni and Co. Enhanced activity and durability were recorded for the hybrid and bimetallic PANI‐NiCo composite.