Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 71, Issue -, Pages 562-571Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2022.04.022
Keywords
Photocatalysis; Dry reforming of methane; Greenhouse gas conversion; Gas-phase reaction; Titanium dioxide; TiO2-B
Funding
- Japan Science and Technology Agency (JST) CREST [JPMJCR15P1]
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A rhodium catalyst supported on TiO2-B nanobelts was reported, which efficiently converts methane and carbon dioxide into syngas through photocatalysis at low temperatures. It exhibited higher durability and activity compared to conventional TiO2 catalysts.
The conversion of methane and carbon dioxide into syngas (dry reforming of methane; DRM) has attracted attention owing to the potential to reuse greenhouse gases. Titanium dioxide (TiO2)-based photocatalysts, which have been widely commercialized owing to their high efficiency, non-toxicity, and low cost, are strongly desired in DRM. Here, we report a monoclinic-phase TiO2-B nanobelts-supported rhodium (Rh/TiO2-B nanobelts) catalyst that efficiently promotes DRM under ultraviolet light irradiation at low temperatures. Photogenerated holes in the TiO2-B nanobelts were used to oxidize methane, while the electrons were trapped in rhodium to reduce carbon dioxide. Rh/TiO2-B nanobelts exhibited considerably higher durability and activity than Rh-loaded conventional TiO2 (anatase and rutile), owing to the lattice and/or surface oxygen reactivity in TiO2-B nanobelts, which was suggested by X-ray photoelectron spectroscopy measurements and photocatalytic performance tests under an atmosphere of methane alone. This study paves the path for the effective utilization of methane by constructing active TiO2-based nanometal photocatalysts. (C) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
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