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Structures and electronic properties of Cu (m) Co (n) -CO2-H2O(m + n=2 similar to 7) clusters

机译:Cu(M)Co(N)-CO2-H2O(M + N = 2类似于7)簇的结构和电子性质

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摘要

A theoretical study was carried out of CO2 and H2O co-adsorption on Cu (m) Co (n) (2 m + n 7) clusters using density functional method. The results show that, generally, CO2 molecules are adsorbed at top and bridge sites, but CO2 of Cu2CO4-CO2-H2O, Cu2Co5-CO2-H2O, and Co-7-CO2-H2O clusters are at hollow sites. And H2O are all adsorbed at top sites via O atoms. Co-5-CO2-H2O, CuCo2-CO2-H2O, Cu2Co-CO2-H2O, and Cu5Co-CO2-H2O clusters show better thermodynamic stability, while Cu-2-CO2-H2O, Co-2-CO2-H2O, Cu2Co-CO2-H2O, Cu3Co-CO2-H2O, and Cu-6-CO2-H2O have stronger chemical stability. Mulliken charge and partial density of states are also analyzed for understanding the effect on interaction between CO2 and Cu-Co clusters after doping H2O.
机译:使用密度官能法在Cu(M)Co(N)(2M + N 7)簇上的CO 2和H 2 O共吸收中进行理论研究。 结果表明,通常,CO 2分子在顶部和桥接点吸附,但Cu 2 CO 4-CO 2-H 2 O,Cu 2 CO 5-CO 2-H 2 O和CO-7-CO2-H2O簇的CO 2在中空位点。 H2O全部通过O原子吸附在顶部位点。 CO-5-CO2-H2O,CUCO2-CO2-H2O,CU 2 CO-CO 2-H 2 O和CU 5CO-CO2-H2O簇显示出更好的热力学稳定性,而CU-2-CO2-H2O,CO-2-CO2-H2O,CU 2 CO -CO2-H 2 O,Cu 3CO-CO 2-H 2 O和Cu-6-CO 2 -H2O具有较强的化学稳定性。 还分析了巨大的指控和局部密度,以了解掺杂H2O后CO2和Cu-Co簇之间的对CO2和Cu-Co簇之间的相互作用的影响。

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