水对甲醇在Rutile-TiO2(110)-(1×1)表面光催化解离的影响

采用程序升温脱附方法研究了甲醇分子吸附在真空退火后的二氧化钛(110)表面的光催化过程,对比分析了单独吸附甲醇分子以及甲醇分子与水分子共吸附情况下的光催化解离过程。结果表明,在二氧化钛(110)表面吸附的甲醇分子对共吸附水分子的光催化解离过程并没有直接的帮助作用。共吸附状态下的水分子也同样没有影响到甲醇的光致解离过程,但是水分子的存在抑制了甲醇光解产物甲醛的光致脱附过程,同时促进了甲酸甲酯的形成。...

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Published in催化学报 Vol. 35; no. 3; pp. 416 - 422
Main Author 徐晨彪 杨文绍 郭庆 戴东旭 陈茂笃 杨学明
Format Journal Article
LanguageChinese
Published 中国科学院大连化学物理研究所分子反应动力学国家重点实验室,辽宁 大连 116023%中国科学院大连化学物理研究所分子反应动力学国家重点实验室,辽宁 大连,116023%大连理工大学物理与光电工程学院,辽宁 大连,116023 2014
大连理工大学物理与光电工程学院,辽宁 大连 116023
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ISSN0253-9837
1872-2067
DOI10.1016/S1872-2067(14)60006-1

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Abstract 采用程序升温脱附方法研究了甲醇分子吸附在真空退火后的二氧化钛(110)表面的光催化过程,对比分析了单独吸附甲醇分子以及甲醇分子与水分子共吸附情况下的光催化解离过程。结果表明,在二氧化钛(110)表面吸附的甲醇分子对共吸附水分子的光催化解离过程并没有直接的帮助作用。共吸附状态下的水分子也同样没有影响到甲醇的光致解离过程,但是水分子的存在抑制了甲醇光解产物甲醛的光致脱附过程,同时促进了甲酸甲酯的形成。
AbstractList 采用程序升温脱附方法研究了甲醇分子吸附在真空退火后的二氧化钛(110)表面的光催化过程,对比分析了单独吸附甲醇分子以及甲醇分子与水分子共吸附情况下的光催化解离过程。结果表明,在二氧化钛(110)表面吸附的甲醇分子对共吸附水分子的光催化解离过程并没有直接的帮助作用。共吸附状态下的水分子也同样没有影响到甲醇的光致解离过程,但是水分子的存在抑制了甲醇光解产物甲醛的光致脱附过程,同时促进了甲酸甲酯的形成。
采用程序升温脱附方法研究了甲醇分子吸附在真空退火后的二氧化钛(110)表面的光催化过程,对比分析了单独吸附甲醇分子以及甲醇分子与水分子共吸附情况下的光催化解离过程。结果表明,在二氧化钛(110)表面吸附的甲醇分子对共吸附水分子的光催化解离过程并没有直接的帮助作用。共吸附状态下的水分子也同样没有影响到甲醇的光致解离过程,但是水分子的存在抑制了甲醇光解产物甲醛的光致脱附过程,同时促进了甲酸甲酯的形成。
Abstract_FL We have performed a surface photocatalysis study of the molecularly adsorbed forms of methanol on a vacuum-annealed rutile TiO2(110)-(1 × 1) surface using temperature-programmed desorption both with and without coadsorbed water to investigate the effect of water and methanol on the photocatalytic dissociation of each other on rutile TiO2(110)-(1 × 1). Our experimental results show conclusively that methanol has no effect on photocatalytic water splitting with water covered rutile TiO2(110)-(1 × 1) surface. Further experimental results also show that water does not affect the process of photocatalytic methanol dissociation but does suppress photo-induced desorption of the formaldehyde product of methanol photocatalysis and can enhance the formation of the methyl formate product.
Author 徐晨彪 杨文绍 郭庆 戴东旭 陈茂笃 杨学明
AuthorAffiliation 大连理工大学物理与光电工程学院,辽宁 大连 116023 中国科学院大连化学物理研究所分子反应动力学国家重点实验室,辽宁 大连116023
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Author_FL Xueming Yang
Chenbiao Xu
Maodu Chen
Dongxu Dai
Wenshao Yang
Qing Guo
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Issue 3
Keywords Water
Rutile TiO2-(1×1)
程序升温脱附

Photocatalysis
金红石二氧化钛-(1 × 1)表面
甲醛
光催化
甲醇
Temperature-programmed desorption
Formaldehyde
Methanol
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Notes Chenbiao Xu, Wenshao Yang, Qing Guo, Dongxu Dai, Maodu Chen, Xueming Yang(1Department of Physics and Optoelectric Engineering, Dalian University of Technology, Dalian 116023, Liaoning, China ;2 State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China)
Methanol;Water;Photocatalysis;Temperature-programmed desorption;Formaldehyde
We have performed a surface photocatalysis study of the molecularly adsorbed forms of methanol on a vacuum-annealed rutile TiO2(110)-(1 × 1) surface using temperature-programmed desorption both with and without coadsorbed water to investigate the effect of water and methanol on the photocatalytic dissociation of each other on rutile TiO2(110)-(1 × 1). Our experimental results show conclusively that methanol has no effect on photocatalytic water splitting with water covered rutile TiO2(110)-(1 × 1) surface. Further experimental results also show that water does not affect the process of photocatal
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StartPage 416
SubjectTerms 1)表面
Rutile
TiO2(110)-(1×1)
×
光催化

甲醇
甲醛
程序升温脱附
金红石二氧化钛(110)-(1
Title 水对甲醇在Rutile-TiO2(110)-(1×1)表面光催化解离的影响
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