(621i) Understanding Ethanol Hydrogen Abstraction Mechanism on CuNi Catalyst

Authors: 
Ashok, A., Qatar University
Kumar, A., Qatar University
Bhosale, R., Qatar University
Almomani, F., Qatar University

In this paper, we present the reaction mechanism involved in ethanol dehydrogenation over transition metal catalysts Cu and Ni. In situ DRIFTS studies were conducted on individual metals (Cu and Ni) as well as on CuNi alloy to understand the metal-metal interaction in bimetallic systems and their implications on reaction pathway. These catalysts were synthesized using solution combustion synthesis method. The catalyst synthesis parameters (such as fuel to oxidizer ratio, combustion temperature) were monitored and correlated with the synthesized materials properties. The amount of fuel content in the combustion solution was found to greatly affect the phase and microstructure of the synthesized catalysts. Along with the microstructure, surface phase distribution was also studied for various fuel to oxidizer ratio using XPS and changes on surface composition were monitored after catalyst activation (reduction) and after the ethanol dehydrogenation reaction.

In this paper, we present the reaction mechanism involved in ethanol dehydrogenation over transition metal catalysts Cu and Ni. In situ DRIFTS studies were conducted on individual metals (Cu and Ni) as well as on CuNi alloy to understand the metal-metal interaction in bimetallic systems and their implications on reaction pathway. These catalysts were synthesized using solution combustion synthesis method. The catalyst synthesis parameters (such as fuel to oxidizer ratio, combustion temperature) were monitored and correlated with the synthesized materials properties. The amount of fuel content in the combustion solution was found to greatly affect the phase and microstructure of the synthesized catalysts. Along with the microstructure, surface phase distribution was also studied for various fuel to oxidizer ratio using XPS and changes on surface composition were monitored after catalyst activation (reduction) and after the ethanol dehydrogenation reaction.

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