Crystallinity of Cerium Oxide Dictates Reactivity of Platinum Catalysts

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-02-10 DOI:10.1021/acs.nanolett.5c00189

Nan Zhang, Jiankang Zhao, Jie Wei, Hongliang Li, Wenlong Wu, Xu Li, Jingyue Liu, Jie Zeng

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Abstract

The reactivity of supported metal catalysts can be influenced by the nature of supports, which synergistically activate reactant molecules with metal sites. The investigation of the crystalline effect of CeO₂ remains unclear because of the easy formation of fluorite-structure CeO₂. Here, we successfully synthesized CeO_x clusters with distinct crystallinity and established that the crystalline nature of CeO_x clusters dictates the reactivity of the Pt/CeO_x catalysts for CO oxidation. Specifically, Pt clusters supported on crystalline CeO_x exhibited a specific CO conversion rate approximately 15-fold higher than those on amorphous CeO_x at temperatures of 120 to 140 °C. Detailed experimental investigations and simulations revealed that the enhanced CO oxidation reactivity originates from the higher mobility of lattice oxygen and more labile oxygen species on crystalline CeO_x nanoclusters. This work deepens our understanding of crystallinity-dependent redox properties of nanoscale oxide supports and opens new routes for designing better metal catalysts for targeted reactions.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.