AI Article Synopsis
- Developing new methods for creating durable single-atom catalysts (SACs) from precious metals is tough for industrial use.
- The strategy involves using bimetallic nanocrystals to convert noble metals into single atoms that bind to aluminum oxide, enhancing stability and creating many anchoring sites.
- The resulting Pd/AlCoO-AlO catalyst demonstrates improved performance at lower temperatures and excellent stability during tough conditions, making it promising for pollution control.
Article Abstract
Designing new synthesis routes to fabricate highly thermally durable precious metal single-atom catalysts (SACs) is challenging in industrial applications. Herein, a general strategy is presented that starts from dual-metal nanocrystals (NCs), using bimetallic NCs as a facilitator to spontaneously convert a series of noble metals to single atoms on aluminum oxide. The metal single atoms are captured by cation defects formed on the surface of the inverse spinel (ABO) structure, which process provides numerous anchoring sites, thus facilitating generation of the isolated metal atoms that contributes to the extraordinary thermodynamic stability. The Pd/AlCoO-AlO shows not only improved low-temperature activity but also unprecedented (hydro)thermal stability for CO and propane oxidation under harsh aging conditions. Furthermore, our strategy exhibits a small scaling-up effect by the simple physical mixing of commercial metal oxide aggregates with AlO. The good regeneration between oxidative and reductive atmospheres of these ionic palladium species makes this catalyst system of potential interest for emissions control.
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| http://dx.doi.org/10.1021/jacs.3c02909 | DOI Listing |
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