Iron Oxide Nanoclusters Incorporated into Iron Phthalocyanine as Highly Active Electrocatalysts for the Oxygen Reduction Reaction.

Release time:2022-02-22

Impact Factor:4.5

DOI number:10.1002/cctc.201701183

Journal:ChemCatChem

Abstract:Iron-nitrogen-carbon (Fe-N-C)compositeshaveemergedasactiveand non-precious-metalelectrocatalystsfor the oxygenreductionreaction (ORR).Here, we developedasimpleprocessto synthesizeFeOxnanoclusters(NCs)incorporatedwithironphthalocyanine (FePc)supportedon graphene (FeOx/FePc)ashighlyactiveelectrocatalystsfor the ORRby aself-assemblymethod. The electrochemical activityof FeOx/FePcdependsonthe loadingor size of the FeOxNCs.The bestresultsare ob-tainedon FeOx/FePcwith10 wt%FeOxNCsof asize of ap-proximately2nmand athicknessofapproximately0.6 nm,whichachievesahalf-wavepotentialof 0.888 Vand currentdensity of 37.6 Ag@1at 0.9 V(vs. the reversiblehydrogen elec-trode). Thisis 50 mV higherthanthatof FePcsupportedongraphene and 64 mV higherthan that of Pt/Cin 0.1mKOHso-lutionat acatalyst loadingof 0.1 mgcm@2.X-rayabsorptionspectroscopyandelectrochemical cyclic voltammetryresultsindicatethat the incorporatedFeOxNCsinteractwith theactivecenterof FePc,Fe@N4,toenhancethe electrontransitionand reversibilityof the FeIII/FeIIredoxcoupleand promotethekineticsof the ORR.We demonstratethatthe natureof theactivecenterofFePc (i.e.,Fe@N4)isrelatedcloselyto the activi-ty of the FeIII/FeIIredoxcouple.

Indexed by:Journal paper

Volume:10

Page Number:475-483

Translation or Not:no

Date of Publication:2017-08-04

Links to published journals:https://doi.org/10.1002/cctc.201701183