烷基醇於Cu(110)表面吸附及熱分解反應

Adsorption and Thermal Decomposition of Alkly Alcohol on Cu(110) Surface

林宏偉

指導教授 ： 洪偉修

國立臺灣師範大學/理學院/化學系/碩士(2005年)

摘要

無資料

關鍵字

光電子能譜 ； 程溫脫附技術 ； 氧化分解 ； 銅 ； 烷醇類

並列摘要

Adsorption and thermal reactions of alcohol (ROH；R= (CH)n ,n=1~ 4) on the Cu(110) have been studied by temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS) under ultra-high vacuum system. Desorption profiles of evolved gases from the surface of the Cu(110) were detected by quardrupole mass in the system of the TPD. Intermediate species adsorbed on surface were characterized with XPS using synchrotron radiation.

The chemistry of short chain alcohols on Cu surface has been studies extensively that as a result of their importance in catalytic chemistry. Previous studty of alcohols on clean Cu surfaces that can deprotonate the alcohol and produce alkoxide intermediate on the surface. In partpcular, on the clean Cu surface on which alcohols are adsorbed reversibly.

The molecular desportion measurements found that the heats of adsorption of the alcohols increased with increasing chain length. While decomposition of alcohols led to H2 and aldehyde on the surface. It has been proposed that these latter reactions proceed by alkylidyne intermediates led to carbon desposition on the surface.

並列關鍵字

TPD ； XPS ； Cu(110) ； alcohol ； oxidation and decomposition