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Silver‐Graphene Nanoribbon Composite Catalyst for the Oxygen Reduction Reaction in Alkaline Electrolyte
Author(s) -
Davis Danae J.,
Raji AbdulRahman O.,
Lambert Timothy N.,
Vigil Julian A.,
Li Lei,
Nan Kewang,
Tour James M.
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300254
Subject(s) - catalysis , graphene , oxygen reduction reaction , electrolyte , materials science , substrate (aquarium) , carbon nanotube , carbon fibers , composite number , alloy , oxygen , chemical engineering , graphene nanoribbons , inorganic chemistry , chemistry , nanotechnology , electrode , electrochemistry , metallurgy , composite material , organic chemistry , oceanography , geology , engineering
Silver‐graphene nanoribbons (Ag‐GNRs) were prepared from the chemical unzipping of multiwalled carbon nanotubes (MWCNTs) by reaction with Na/K alloy, Ag(O 2 CCH 3 ) and then CH 3 OH. Ag‐GNRs exhibited improved electrocatalytic ability for the oxygen reduction reaction (ORR) in 0.1 M KOH as compared to the underlying GNR substrate alone and displayed an earlier onset and higher currents than a commercial Ag/Carbon (Ag/C) catalyst. The Ag‐GNR hybrid demonstrates an outstanding tolerance to CH 3 OH crossover which exceeds that of the commercial benchmark, 20 % Pt/C.