TY - JOUR
T1 - Effect of TiO2 support on immobilization of cobalt porphyrin for electrochemical CO2 reduction
AU - Gu, Shengshen
AU - Marianov, Aleksei N.
AU - Xu, Haimei
AU - Jiang, Yijiao
PY - 2021/7/30
Y1 - 2021/7/30
N2 - Electrochemical reduction of CO2 is a promising strategy to manage the global carbon balance by transforming CO2 into chemicals. The efficiency of CO2
electroreduction is largely dependent on the design of hybrid electrode
where both support and catalyst govern the performance of the
electrolyzer. In this work, TiO2 calcined at different
temperatures, was used as a support for immobilization of cobalt
tetraphenyl porphyrin (CoTPP) and its effect on CO2 reduction was studied. It is demonstrated that the crystalline phase of TiO2 and doping of TiO2 apparently affecting CO2
electroreduction. It is found that anatase phase exhibits higher
activity and selectivity compared to rutile due to the enhanced
conductivity which in turn enables faster electron transfer between the
support and CoTPP. As for dopants, the carbon doping in anatase TiO2
is proven to further enhance its conductivity, consequently resulting
in the enhanced performance. This study implies that the rational design
of supports is important for the performance of the hybrid electrode
towards electrochemical CO2 reduction.
AB - Electrochemical reduction of CO2 is a promising strategy to manage the global carbon balance by transforming CO2 into chemicals. The efficiency of CO2
electroreduction is largely dependent on the design of hybrid electrode
where both support and catalyst govern the performance of the
electrolyzer. In this work, TiO2 calcined at different
temperatures, was used as a support for immobilization of cobalt
tetraphenyl porphyrin (CoTPP) and its effect on CO2 reduction was studied. It is demonstrated that the crystalline phase of TiO2 and doping of TiO2 apparently affecting CO2
electroreduction. It is found that anatase phase exhibits higher
activity and selectivity compared to rutile due to the enhanced
conductivity which in turn enables faster electron transfer between the
support and CoTPP. As for dopants, the carbon doping in anatase TiO2
is proven to further enhance its conductivity, consequently resulting
in the enhanced performance. This study implies that the rational design
of supports is important for the performance of the hybrid electrode
towards electrochemical CO2 reduction.
KW - CO₂ electroreduction
KW - Cobalt porphyrin
KW - Immobilization
KW - TiO₂ support
KW - Carbon doping
UR - http://www.scopus.com/inward/record.url?scp=85098879082&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/DP1901013720
U2 - 10.1016/j.jmst.2020.09.053
DO - 10.1016/j.jmst.2020.09.053
M3 - Article
VL - 80
SP - 20
EP - 27
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
SN - 1005-0302
ER -