Effect of Different Alkali-assisted Deposition Precipitation Methods on the Durability of Three-way Catalysts
Source abstract
Abstract
The aging treatment always brings about severe deactivation of three-way catalysts (TWCs) so that improving the durability is one goal of TWCs design. In this work, Pt/Ce 0.4 Zr 0.5 La 0.05 Pr 0.05 O 2 (Pt/CZ) TWCs were prepared by two different alkali-assisted deposition precipitation method, urea or ammonia. The effects of different alkali-assisted on the physicochemical properties, catalytic activity and durability were analyzed. It was found that the Pt/CZ catalyst prepared by urea-assisted deposition precipitation method (UDP) had poor aging resistance but the Pt/CZ catalyst prepared by ammonia-assisted (ADP) showed better anti-aging ability. Based on the results of XRD, CO adsorption, XPS and H 2 -TPR, comparatively larger particle size of Pt species and stronger interaction for ADP make it more difficult to sinter together during the aging treatment, which is favorable for maintaining catalytic activity. Therefore, the ADP catalyst shows a bright future for industrialization.
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Research context
OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Hydrodesulfurization Studies · Catalysts for Methane Reforming
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
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