Efficient volcano-type dependence of photocatalytic CO₂ conversion into methane using hydrogen at reaction pressures up to 0.80 MPa

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• 作者：Shogo Kawamura^a ; Hongwei Zhang^a ; Masayuki Tamba^b ; Takashi Kojima^b ; Masaya Miyano^a ; Yusuke Yoshida^a ; ¹ ; Mao Yoshiba^a ; Yasuo Izumi^a ; ^{yizumi@faculty.chiba-u.jp}
• 关键词：CO2 conversion ; Pressure dependence ; Pd/TiO2 ; Electron trap ; Oxygen vacancy ; Interface site ; Surface plasmon resonance ; Contour plot
• 刊名：Journal of Catalysis
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：345
• 期：Complete
• 页码：39-52
• 全文大小：3145 K
• 卷排序：345

文摘

CO2 photoconversion by H2 was performed at up to 0.80 MPa. Pd/TiO2 was the most active at P(H2) = 0.28 MPa and P(CO2) = 0.12 MPa. The Pd surface was active for photoreduction but hindered by H adsorption. Protons formed by holes produced methane if combined with CO2 and electrons on Pd. O vacancy sites were formed only at the interface between Pd and TiO2.