The Forms of Chemisorption of H2over Rh-V/SiO2

Abstract

Abstract: The forms of chemisorption of H₂over Rh-V/SiO₂have been studied by infrared spectroscopy. On 0.7% Rh-V/SiO₂, gem dicarbonyl band are observed at 2092 and 2029cm^-1for Co adsorption, while on 3%Rh-V/SiO₂in addition to gem dicarbonyl bands appearing at 2092 and 2029 cm^-1, linear CO and bridged COb ands are observed at 2066 and 1873 cm^-1, respectively. On 0.7%Rh-V/SiO₂one band for Rh Hvibration is observed at 1865cm^-1, while two bands appearing at 1988 and 1865 cm^-1resectively for Rh Hvibration are obtained over 3%Rh-V/SiO₂By comparison with CO adsorption on R-V/SiO₂catalysts, the band at 1865cm^-1can be designed to adsorbed hydrogen on the isolated Rh sites, and the band at 1988cm^-1to adsorption of H₂on crystalline Rh.

Key words: Rh-V/SiO₂catalysts, CO adsorption, The forms of chemisorbed hydrogen, FTIR

CLC Number:

O643.1

TrendMD:

CHEN Yao-Qiang, TANG Shui-Hua, ZHANG Ai-Min, ZHANG Ai-Lian, GONG Mao-Chu . The Forms of Chemisorption of H₂over Rh-V/SiO₂[J]. Chem. J. Chinese Universities, 1999, 20(7): 1119.

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The Forms of Chemisorption of H₂over Rh-V/SiO₂

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