Mixed Perovskite Phases of BaTiO 3 /BaTi 5 O 11 for Efficient Electrochemical Reduction of CO 2 to CO.

Autor: Marbaniang P; Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India., Kumar Tiwari D; Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India., Ingavale S; Department of Chemistry, SRM University-AP, Amaravati, Neerukonda, Guntur Dt. Andhra Pradesh, 522240, India., Lata Singh D; Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India., Rao GR; Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India.
Jazyk: angličtina
Zdroj: Chemistry, an Asian journal [Chem Asian J] 2024 Nov 19, pp. e202401017. Date of Electronic Publication: 2024 Nov 19.
DOI: 10.1002/asia.202401017
Abstrakt: One of the most promising approaches in solving the energy crisis and reducing atmospheric CO 2 emissions is artificial photosynthetic CO 2 reduction. The electrochemical method for CO 2 reduction is more appealing since it can be operated under ambient conditions, and the product selectivity strongly depends on the applied potential. Perovskites with ferroelectric properties strongly adsorb linear CO 2 molecules. In this study, barium titanate (BaTiO 3 ) perovskite is used as an electrocatalyst to promote CO 2 activation and conversion to CO. Perovskite catalysts were prepared by ball-milling followed by annealing at 900 °C for 4 to 6 h in an open atmosphere. The TEM and SEM study shows that the particle size varies in the range of 80-200 nm. Mixed phases of BaTiO 3 and BaTi 5 O 11 supported on nitrogen-doped carbon nanotubes are found to be highly active for electrocatalytic CO 2 reduction to CO with maximum Faradaic efficiency of 89.4 % at -1.0 V versus Ag/AgCl in CO 2 saturated 0.5 KOH solution. This study concludes that mixed phases of BaTiO 3 and BaTi 5 O 11 are more active and highly selective for CO 2 conversion to CO compared to single-phase BaTiO 3 .
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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