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Complexes in the Photocatalytic Reaction of CO2 and H2O: Theoretical Studies
Department of Chemistry, Nanchang University, Nanchang 330031, China
Department of Chemistry, QiqihaerUniversity, Qiqihaer 161006, China
* Author to whom correspondence should be addressed.
Received: 5 July 2010; in revised form: 16 July 2010 / Accepted: 18 July 2010 / Published: 29 July 2010
Abstract: : 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.
Keywords: e–(H2O/CO2); h+–(H2O/CO2); photocatalytic reaction; theoretical studies
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Luo, D.; Zhang, N.; Hong, S.; Wu, H.; Liu, Z. Complexes in the Photocatalytic Reaction of CO2 and H2O: Theoretical Studies. Int. J. Mol. Sci. 2010, 11, 2792-2804.
Luo D, Zhang N, Hong S, Wu H, Liu Z. Complexes in the Photocatalytic Reaction of CO2 and H2O: Theoretical Studies. International Journal of Molecular Sciences. 2010; 11(8):2792-2804.
Luo, Dongmei; Zhang, Ning; Hong, Sanguo; Wu, Huanwen; Liu, Zhihua. 2010. "Complexes in the Photocatalytic Reaction of CO2 and H2O: Theoretical Studies." Int. J. Mol. Sci. 11, no. 8: 2792-2804.