Synthesis of Anchored Bimetallic Catalysts via Epitaxy

Abstract

Abstract:The development of thermodynamically stable supported bimetallic catalysts for high-temperature reaction is significant and highly desirable but remains a grand challenge. In this work, we report a novel approach that relies on the interaction of metal nanoparticles with the support material to form unique bimetallic nanoparticles, which epitaxially anchor onto the support surface. Such unique nanostructured systems are catalytically active and ultrastable during selected catalytic reactions. In this paper, we describe the synthesis processes of ultrastable PtZn nanoparticles epitaxially anchored onto ZnO nanowires, which primarily consist of {10´10} nanoscale facets. Such anchored PtZn nanoparticles demonstrated good stability during high temperature treatments and selected catalytic reactions. The synthesis approach reported in this work provides a new strategy to develop thermodynamically stable supported bimetallic catalysts.

Styrene Hydroformylation with In Situ Hydrogen: Regioselectivity Control by Coupling with the Low‐Temperature Water–Gas Shift Reaction

“…Except for Rh 1 /ZnO, all catalysts were active for this reaction, with high l/b ratios, thus demonstrating the universality of this strategy. The lack of activity of Rh 1 /ZnO is expected owing to the low activity of the metal–ZnO interface for LWGS …”

Styrene Hydroformylation with In Situ Hydrogen: Regioselectivity Control by Coupling with the Low‐Temperature Water–Gas Shift Reaction

“…The lack of activity of Rh 1 /ZnO is expected owing to the low activity of the metal-ZnO interface for LWGS. [23] The products obtained on NP catalysts were mainly the corresponding phenylpropanols rather than aldehydes (Table 1, entry 5). We speculate that the different aldehyde/ alcohol selectivity on Rh 1 /CeO 2 and NP-Rh/CeO 2 is caused by their different hydrogenation activity for the C=O bond.…”