Complexes in the Photocatalytic Reaction of CO2 and H2O: Theoretical Studies

被引：3

作者：

Luo, Dongmei ^{[1
,2
]}

Zhang, Ning ^{[1
]}

Hong, Sanguo ^{[1
]}

Wu, Huanwen ^{[1
]}

Liu, Zhihua ^{[1
]}

机构：

[1] Nanchang Univ, Dept Chem, Nanchang 330031, Peoples R China

[2] Qiqihar Univ, Dept Chem, Qiqihar 161006, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES | 2010年 / 11卷 / 08期

关键词：

e-(H2O/CO2); h(+)-(H2O/CO2); photocatalytic reaction; theoretical studies; PHOTO-REDUCTION; BASIS-SETS; AB-INITIO; TIO2; WATER; APPROXIMATION; DERIVATIVES; CATALYSTS; ZEOLITES; ENERGIES;

D O I：

10.3390/ijms11082792

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Complexes (H2O/CO2, e-(H2O/CO2) and h(+)-(H2O/CO2)) in the reaction system of CO2 photoreduction with H2O were researched by B3LYP and MP2 methods along with natural bond orbital (NBO) analysis. Geometries of these complexes were optimized and frequencies analysis performed. H2O/CO2 captured photo-induced electron and hole produced e-(H2O/CO2) and h(+)-(H2O/CO2), respectively. The results revealed that CO2 and H2O molecules could be activated by the photo-induced electrons and holes, and each of these complexes possessed two isomers. Due to the effect of photo-induced electrons, the bond length of C=O and H-O were lengthened, while H-O bonds were shortened, influenced by holes. The infrared (IR) adsorption frequencies of these complexes were different from that of CO2 and H2O, which might be attributed to the synergistic effect and which could not be captured experimentally.

引用

页码：2792 / 2804

页数：13

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