Photocatalytic Conversion of Diluted CO2 into Light Hydrocarbons Using Periodically Modulated Multiwalled Nanotube Arrays


  • All authors thank NSERC for funding support. Infrastructure used in the project was made possible by a Leaders Opportunity Fund grant to K.S. from the Canada Foundation for Innovation (CFI) and matched by a similar grant from the Alberta Small Equipment Grants Program (SEGP). S.F. thanks Alberta Innovates Technology Futures for scholarship support. K.S. was also supported by a Petro-Canada Young Innovator Award. X.Z. acknowledges Dr. Dimitre Karpuzov and Shihong Xu at the Alberta Centre for Surface Engineering and Science (ACSES). S.F. thanks Diane Caird at the X-ray Diffraction Laboratory.


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Cu–Pt bimetallic shells supported on a double-walled TiO2 nanotube (PMTiNT) array are efficient photocatalysts for the room-temperature conversion of CO2 into light hydrocarbons, such as CH4, C2H4, and C2H6. When Cu0.33–Pt0.67/PMTiNT was used for the photoreduction of diluted CO2 (1 % in N2), an average hydrocarbon production rate of 3.7 mL g−1 h−1 or 6.1 mmol m−2 h−1 was realized under AM 1.5 one-sun illumination.