Platinum Nanoparticle Modulated Titania Electronic Structure Descriptors for Selective Photocatalytic CO2 Conversion
學年 112
學期 1
出版（發表）日期 2023-10-30
作品名稱 Platinum Nanoparticle Modulated Titania Electronic Structure Descriptors for Selective Photocatalytic CO2 Conversion
作品名稱（其他語言）
著者 Hao-Chun Chang, Chao-Lung Chiang, Yan-Gu Lin, Wei-Che Tseng, Chao-Cheng Kaun, Yen-Hsun Su, Jen-Sue Chen, Jih-Jen Wu
單位
出版者
著錄名稱、卷期、頁數 Applied Surface Science, 635, 157678
摘要 Modulation of the electronic structure of TiO2 nanorod array (NR), which governs the selectivity for the photocatalytic CO2 conversion, is demonstrated by the deposition of Pt nanoparticles (NPs) with various configurations. In-situ X-ray absorption near edge structure (XANES) measurements suggest that the active sites for the photocatalytic reaction are located on the surface of TiO2 NRs, but not on the Pt NPs, because the photocharge transfer from TiO2 NRs to Pt NPs is inefficient. The t2g/eg orbital ratio and / orbital ratio of TiO2 acquired from Ti L3-edge spectra of the Pt NP/TiO2 NR photocatalysts, which are strongly influenced by the feature of the deposited Pt NPs, are respectively well-correlated to the experimental selectivity of H2 and CH4 for photocatalytic CO2 conversion as well as the density functional theory calculated adsorption energies of H atom and CO molecule on the TiO2 surface. The Pt NPs thus play a crucial role as a promoter rather than as a cocatalyst. Besides the adsorption energies of H and CO on TiO2, the t2g/eg and / ratios of Ti 3d unoccupied state can be the electronic structure-based descriptors of TiO2 heterostructures for photocatalytic CO2 conversion to distinguish between H2 evolution and CH4 formation.
關鍵字 Titania, Electronic structure descriptors, Photocatalytic CO2 conversion, Selectivity, Platinum nanoparticle
語言 zh_TW
ISSN
期刊性質 國內
收錄於 SCI SSCI Scopus
產學合作
通訊作者 Jih-Jen Wu
審稿制度 否
國別 TWN
公開徵稿
出版型式 ,電子版
SDGS 氣候行動,可負擔的潔淨能源,產業創新與基礎設施