Silver‐Graphene Nanoribbon Composite Catalyst for the Oxygen Reduction Reaction in Alkaline Electrolyte

Abstract

Abstract 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.