Rhodium dispersion during NO/CO conversions.

Under catalytic conditions for NO/CO conversion, simultaneous time resolved EXAFS and IR studies show that the rhodium atoms in 5 wt% Rh/Al2O3 rapidly migrate between CO covered Rh particles and mononuclear Rh-NO sites, depending as the gas composition is changed. At lower temperatures (473 K) there is interconversion between Rh(CO)2 and Rh(NO) centres.

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