Chemisorption of carbon monoxide, hydrogen, and oxygen on ordered tin/platinum(111) surface alloys
Chemisorption of carbon monoxide, hydrogen, and oxygen on ordered tin/platinum(111) surface alloys
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DOI：
10.1021/j100380a053
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发表时间：
1990-08
期刊：
影响因子：
--
通讯作者：
M. Paffett;S. Gebhard;R. Windham;B. Koel
中科院分区：
文献类型：
--
作者：
M. Paffett;S. Gebhard;R. Windham;B. Koel
The chemisorption of CO, H{sub 2}, and O{sub 2} on ordered Pt-Sn surface alloys has been investigated by using thermal desorption mass spectroscopy (TDMS), high-resolution electron energy loss spectroscopy (HREELS), low-energy electron diffraction (LEED), Auger electron (AES), X-ray photoelectron (XPS) and ultraviolet photoelectron spectroscopy (UPS), and low-energy ion scattering spectroscopy (LEISS). Alloying with Sn causes only slight decreases in the CO desorption peak temperature compared to Pt(111). A (2{radical}3{times}2{radical}3)R30{degree} LEED pattern is observed for the saturation CO coverage on the p(2{times}2) ordered alloy surface. No ordered CO overlays were observed by LEED from the ({radical}3{times}{radical}3)R30{degree} alloy surface. HREELS indicates the atop-bonded CO is the most strongly adsorbed species on both ordered alloy surfaces, as on Pt(111), and that both atop and bridge sites are populated for saturation CO coverage on both ordered alloy surfaces.
The chemisorption of CO, H{sub 2}, and O{sub 2} on ordered Pt-Sn surface alloys has been investigated by using thermal desorption mass spectroscopy (TDMS), high-resolution electron energy loss spectroscopy (HREELS), low-energy electron diffraction (LEED), Auger electron (AES), X-ray photoelectron (XPS) and ultraviolet photoelectron spectroscopy (UPS), and low-energy ion scattering spectroscopy (LEISS). Alloying with Sn causes only slight decreases in the CO desorption peak temperature compared to Pt(111). A (2{radical}3{times}2{radical}3)R30{degree} LEED pattern is observed for the saturation CO coverage on the p(2{times}2) ordered alloy surface. No ordered CO overlays were observed by LEED from the ({radical}3{times}{radical}3)R30{degree} alloy surface. HREELS indicates the atop-bonded CO is the most strongly adsorbed species on both ordered alloy surfaces, as on Pt(111), and that both atop and bridge sites are populated for saturation CO coverage on both ordered alloy surfaces.