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Article

Plasmonic Titanium Nitride Tubes Decorated with Ru Nanoparticles as Photo-Thermal Catalyst for CO2 Methanation

KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
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Academic Editors: Munkhbayar Batmunkh and Angelo Nacci
Molecules 2022, 27(9), 2701; https://doi.org/10.3390/molecules27092701
Received: 11 February 2022 / Revised: 13 April 2022 / Accepted: 14 April 2022 / Published: 22 April 2022
Photo-thermal catalysis has recently emerged as a viable strategy to produce solar fuels or chemicals using sunlight. In particular, nanostructures featuring localized surface plasmon resonance (LSPR) hold great promise as photo-thermal catalysts given their ability to convert light into heat. In this regard, traditional plasmonic materials include gold (Au) or silver (Ag), but in the last years, transition metal nitrides have been proposed as a cost-efficient alternative. Herein, we demonstrate that titanium nitride (TiN) tubes derived from the nitridation of TiO2 precursor display excellent light absorption properties thanks to their intense LSPR band in the visible–IR regions. Upon deposition of Ru nanoparticles (NPs), Ru-TiN tubes exhibit high activity towards the photo-thermal CO2 reduction reaction, achieving remarkable methane (CH4) production rates up to 1200 mmol g−1 h−1. Mechanistic studies suggest that the reaction pathway is dominated by thermal effects thanks to the effective light-to-heat conversion of Ru-TiN tubes. This work will serve as a basis for future research on new plasmonic structures for photo-thermal applications in catalysis. View Full-Text
Keywords: photo-thermal catalysis; carbon dioxide; methanation; titanium nitride; plasmon resonance photo-thermal catalysis; carbon dioxide; methanation; titanium nitride; plasmon resonance
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MDPI and ACS Style

Mateo, D.; Navarro, J.C.; Khan, I.S.; Ruiz-Martinez, J.; Gascon, J. Plasmonic Titanium Nitride Tubes Decorated with Ru Nanoparticles as Photo-Thermal Catalyst for CO2 Methanation. Molecules 2022, 27, 2701. https://doi.org/10.3390/molecules27092701

AMA Style

Mateo D, Navarro JC, Khan IS, Ruiz-Martinez J, Gascon J. Plasmonic Titanium Nitride Tubes Decorated with Ru Nanoparticles as Photo-Thermal Catalyst for CO2 Methanation. Molecules. 2022; 27(9):2701. https://doi.org/10.3390/molecules27092701

Chicago/Turabian Style

Mateo, Diego, Juan C. Navarro, Il S. Khan, Javier Ruiz-Martinez, and Jorge Gascon. 2022. "Plasmonic Titanium Nitride Tubes Decorated with Ru Nanoparticles as Photo-Thermal Catalyst for CO2 Methanation" Molecules 27, no. 9: 2701. https://doi.org/10.3390/molecules27092701

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