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Tunable and Efficient Tin Modified Nitrogen‐Doped Carbon Nanofibers for Electrochemical Reduction of Aqueous Carbon Dioxide
Author(s) -
Zhao Yong,
Liang Jiaojiao,
Wang Caiyun,
Ma Jianmin,
Wallace Gordon G.
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201702524
Subject(s) - overpotential , faraday efficiency , materials science , electrochemical reduction of carbon dioxide , carbon nanofiber , catalysis , nanofiber , electrospinning , chemical engineering , formate , electrochemistry , aqueous solution , tin , carbon fibers , pyrolysis , inorganic chemistry , nanotechnology , electrode , carbon nanotube , organic chemistry , chemistry , composite material , polymer , carbon monoxide , composite number , engineering , metallurgy
Abstract Efficient and selective earth‐abundant catalysts are highly desirable to drive the electrochemical conversion of CO 2 into value‐added chemicals. In this work, a low‐cost Sn modified N‐doped carbon nanofiber hybrid catalyst is developed for switchable CO 2 electroreduction in aqueous medium via a straightforward electrospinning technique coupled with a pyrolysis process. The electrocatalytic performance can be tuned by the structure of Sn species on the N‐doped carbon nanofibers. Sn nanoparticles drive efficient formate formation with a high current density of 11 mA cm −2 and a faradaic efficiency of 62% at a moderate overpotential of 690 mV. Atomically dispersed Sn species promote conversion of CO 2 to CO with a high faradaic efficiency of 91% at a low overpotential of 490 mV. The interaction between Sn species and pyridinic‐N may play an important role in tuning the catalytic activity and selectivity of these two materials.

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