Abstract
Pt/CeO2 has gained much attention for their high activity in low-temperature (LT) water-gas shift (WGS) reaction. However, the inclusion of H2 in the feed as in the practical reaction condition significantly degrades the LT-WGS activity of the Pt/CeO2 catalysts. In this contribution, the activity of Pt/CeO2 catalyst under the feed gas containing excess H2 (20 vol% of H2) was enhanced more than three times by forming CeO2 nano-patches on Pt nano-particles. Both in-situ diffuse reflectance infrared Fourier transform spectroscopy and density functional theory calculation results indicate that dissociated H2 on the Pt nano-particle inhibits the activity of the Pt/CeO2 catalysts by occupying the active sites (Pt nano-particle-CeO2 interface). On the other hand, thin CeO2 nano-patches on Pt nano-particle suppressed the H2 dissociation. As a result, the WGS reactivity of the active Pt nano-particle-CeO2 interface was less affected by H2, granting the catalysts the high activity under the practical reaction conditions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
