화학공학소재연구정보센터
Catalysis Today, Vol.349, 10-16, 2020
Ni-doped ceria nanorods for the WGS reaction: E ffect of Ni distribution in methane suppression
Behavior of Ni-doped CeO 2 nanorods (NR-CeNiX) in WGS reaction is evaluated. The proposed novel system simultaneously exhibits reactive (110)-ceria facets and Ni substitution. Catalytic runs for WGS reaction show greater stability, activity and selectivity towards the shift reaction regarding the traditional Ni-supported (110)- ceria system. Analysis of the surface phenomena during the catalytic reaction, followed by in -situ DRIFTS, in- dicates a formate via mechanism where ceria-nickel interaction plays a key role in the suppression of methane formation. Further surface characterization by X -Ray photoelectron spectroscopy evidences the existence of low - coordination Ni at the ceria surface suggesting that Ni location is the reason for the improvement attained.