Electrochemical modification of the catalytic activity of TiO2/YSZ supported rhodium films

The electrochemical activation of ethylene oxidation was studied over rhodium catalysts of different thickness (40, 100 and 160 nm) sputtered on top of a thin layer of TiO2 deposited on YSZ. The strong relationship between catalytic activity and oxidation state of rhodium was confirmed. Under open-circuit operation the catalyst potential appears as a suitable indicator of the surface oxidation state of rhodium allowing a prediction of the catalytic behavior from solid electrolyte potentiometric measurements. Under closed-circuit conditions the catalyst potential was used as a tool to tune the catalytic activity of rhodium which showed increasing promotional efficiency with decreasing catalyst film thickness.


Published in:
Topics in Catalysis, 44, 3, 355-360
Year:
2007
Other identifiers:
Laboratories:




 Record created 2006-04-11, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)