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 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
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 |
Subjects | |
Online Access | Get full text |
ISSN | 0253-9837 1872-2067 |
DOI | 10.1016/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。 |
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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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DocumentTitleAlternate | The role of water in photocatalytic dissociation of methanol on rutile TiO2(110)-(1×1) |
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Keywords | Water Rutile TiO2-(1×1) 程序升温脱附 水 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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SubjectTerms | 1)表面 Rutile TiO2(110)-(1×1) × 光催化 水 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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