Interaction of Pd and Rh with ZrCeYLaO2 support during thermal aging and its effect on the CO oxidation activity

Nanometals have been proven to be efficient thermocatalysts in the last decades. Their enhanced catalytic activity and tunable functionalities make them intriguing candidates for a wide range of catalytic applications, such as gaseous reactions and compound synthesis/decomposition. On the other hand, the enhanced specific surface energy and reactivity of nanometals can lead to configuration transformation and thus catalytic deactivation during the synthesis and catalysis, which largely undermines the activity and service time, thereby calling for urgent research effort to understand the deactivating mechanisms and develop efficient mitigating methods. Herein, the recent progress in understanding the configuration transformation‐induced catalytic deactivation within nanometals is reviewed. The major pathways of configuration transformations, and their kinetics controlled by the environmental factors are presented. The approaches toward mitigating the transformation‐induced deactivation are also presented. Finally, a perspective on the future academic approaches toward in‐depth understanding of the kinetics of the deactivation of nanometals is proposed.

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Section: Conceptmentioning

confidence: 99%

“…The service time is another factor enhancing the oxidation of nanometals. Figure 12c [ 159 ] presents a diagram showing the 50% conversion temperature (T 50 ) of Pd/Rh nanometals as a function of the operation time. Due to the oxidation, the T 50 of the Pd catalyst dramatically increases after 7 runs with the loss of active materials.…”

Section: Conceptmentioning

confidence: 99%