Adsorption and decomposition of methanol on gold nanoclusters supported on a thin film of Al2O3/NiAl(100)

作者：Sartale Shrikrishna D; Shiu Hong Wan; Ten Ming Han; Lin Won Ru; Luo Meng Fan^*; Lin Yin Chang; Hsu Yao Jane

来源：Journal of Physical Chemistry C, 2008, 112(6): 2066-2073.

DOI：10.1021/jp0767011

Adsorption and decomposition of methanol on Au nanoclusters supported on an ordered ultrathin film of Al2O3/NiAl(100) have been investigated by means of their photoelectron spectra excited with synchrotron radiation and scanning tunneling microscopy. The results show adsorption sites on the clusters of at least two types: one catalyzes the decomposition of methanol via scission of the O-H bond into CO at a temperature as low as 120 K, whereas the other activates dehydrogenation only into methoxy. The CO from the decomposition remains on the surface up to 250 K, begins to desorb above 250 K, and decomposes further into elemental carbon around 350 K. All carbon species are removable from the surface at 450 K, a temperature much lower than on other metals studied. Regarding effects of morphology of the clusters on the reactivity, smaller Au clusters, of height 1-2 atomic layers, exhibit inactivity toward the decomposition of methanol.

• 出版日期2008-2-14
• 单位中央民族大学