NDLI: Enhanced Photocatalytic $CO_{2}$ Reduction over $TiO_{2}$ Using Metalloporphyrin as the Cocatalyst

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Enhanced Photocatalytic $CO_{2}$ Reduction over $TiO_{2}$ Using Metalloporphyrin as the Cocatalyst

Content Provider	MDPI
Author	Wang, Ziyi Zhou, Wei Wang, Xin Zhang, Xueliang Chen, Huayu Hu, Huilin Liu, Lequan Ye, Jinhua Wang, Defa
Copyright Year	2020
Description	The photocatalytic reduction of carbon dioxide (CO2) into CO and hydrocarbon fuels has been considered as an ideal green technology for solar-to-chemical energy conversion. The separation/transport of photoinduced charge carriers and adsorption/activation of CO2 molecules play crucial roles in photocatalytic activity. Herein, tetrakis (4-carboxyphenyl) porphyrin (H2TCPP) was incorporated with different metal atoms in the center of a conjugate macrocycle, forming the metalloporphyrins TCPP-M (M = Co, Ni, Cu). The as-obtained metalloporphyrin was loaded as a cocatalyst on commercial titania (P25) to form TCPP-M@P25 (M = Co, Ni, Cu) for enhanced CO2 photoreduction. Among all of the TCPP-M@P25 (M = Co, Ni, Cu), TCPP-Cu@P25 exhibited the highest evolution rates of CO (13.6 μmol⋅g−1⋅h−1) and CH4 (1.0 μmol⋅g−1⋅h−1), which were 35.8 times and 97.0 times those of bare P25, respectively. The enhanced photocatalytic activity could be attributed to the improved photogenerated electron-hole separation efficiency, as well as the increased adsorption/activation sites provided by the metal centers in TCPP-M (M = Co, Ni, Cu). Our study indicates that metalloporphyrin could be used as a high-efficiency cocatalyst to enhance CO2 photoreduction activity.
Starting Page	654
e-ISSN	20734344
DOI	10.3390/catal10060654
Journal	Catalysts
Issue Number	6
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2020-06-11
Access Restriction	Open
Subject Keyword	Catalysts Environmental Sciences Photocatalysis Metalloporphyrin Cocatalyst Tio2 Co2 Reduction
Content Type	Text
Resource Type	Article

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