铜(410)表面乙烯吸附与脱氢的理论研究

Adsorption and dehydrogenation of ethylene on Cu(410) surface are investigated with firstprinciples calculations and micro-kinetics analysis. Ethylene dehydrogenation is found to start from the most stable π-bonded state instead of the previously proposed di-σ-bonded state. Our vibrational frequencies calculations verify the π-bonded adsorption at step sites at low coverage and low surface temperature and di-σ-bonded ethylene on C-C dimer (C₂H₄-CC) is proposed to be the species contributing to the vibrational peaks experimentally observed at high coverage at 193 K. The presence of C₂H₄-CC indicates that the dehydrogenation of ethylene on Cu(410) can proceed at temperature as low as 193 K.     

全过程工程咨询服务模式的创新研究

<正>全过程工程咨询服务模式是由传统工程咨询模式进化而来的一种崭新模式，其进一步推动了工程咨询行业的长远稳定发展，促使服务模式朝着一体化以及综合化方向发展。本文以全过程工程咨询服务模式的具体类型为切入点，探讨了全过程工程咨询服务模式的根本优势，并以此为基础，重点分析了全过程工程咨询服务模式的创新策略。