278694 Combustion Synthesis of an Active Catalyst for Hydrogen Production From Ethanol: Activity and EXAFS Studies
Combustion synthesis is a well known technique for material synthesis and its application is widely growing for the reason that it is a simple technique, less time consuming and economic as it requires simple equipments. The present study uses combustion synthesis to produce highly active multicomponent catalysts CuxFeyNiz for ethanol decomposition and partial oxidation reaction . In situ FTIR, XANES and EXAFS studies on ethanol decomposition reaction reveals the intermediates formed during the reaction as well as the oxidation states of Ni, Fe and Cu during reaction conditions. These results along with the activity and selectivity results on individual metals are important in terms of understanding the behavior of individual phases and reaction pathway that leads to higher hydrogen production and cleaner byproduct formation.
In situ reduction/oxidation studies on CuNi bimetallic catalyst reveal the rapid changes in the oxidation states of Cu (Fig 1) and Ni (not shown) during the pretreatments of the catalyst. These results indicate that the dynamic complexity of the active phase during reaction conditions, could be different than the freshly synthesized material before exposure to reaction.
Figure 1: In situ reduction and re-oxidation of CuNi bimetallic catalyst
1. Kumar A., Mukasyan A. S., Wolf E. E., Appl. Catal. A: Gen. 401 (2011), pp. 20-28