Two-dimensional iron-tetracyanoquinodimethane(Fe-TCNQ)monolayer:an efficient electrocatalyst for the oxygen reduction reaction
Searching for efficient,cheap,and stable non-Pt electrocatalysts for the oxygen reduction reaction(ORR)has been a major challenge for the development of fuel cells.Herein,we systematically investigated the potential of the experimentally synthesized two-dimensional(2D)metal–tetracyanoquinodimethane(M–TCNQ,where M denotes Mn,Fe,and Co)monolayers as novel ORR catalysts by means of density functional theory(DFT)computations.Our results revealed that O2 molecules can be chemisorbed and efficiently activated on the M–TCNQ monolayers,and the subsequent oxygen reduction can readily proceed via a 4e pathway.Among the monolayers,the Fe–TCNQ monolayer exhibits the highest catalytic activity with onset potentials of 0.63 and 0.20 V in acidic and alkaline media,respectively.Remarkably,its electrocatalytic performance could be further enhanced by the attachment of axial halogen ligands.Therefore,the Fe–TCNQ monolayer might serve as a promising alternative to Pt-based catalysts for the ORR in fuel cells.
Nan Wang Liyan Feng Yongchen Shang Jingxiang Zhao Qinghai Cai Peng Jin
Key Laboratory of Photonic and Electronic Bandgap Materials,Ministry of Education,College of Chemist School of Materials Science and Engineering,Hebei University of Technology,Tianjin,300130,P.R.China
国内会议
大连
英文
352-358
2016-09-24（万方平台首次上网日期，不代表论文的发表时间）