CeO₂ Nanoislands Enhance the Activity and Stability of Pt Nanoparticles Supported on Fibrous Mesoporous SiO₂ for Catalytic Combustion of Propane

Feng He; Cheng Rao; Songyun Tao; Liwei Sun; Ting Yi; Huaiyuan Wang; Bin Hu; Xiangguang Yang; Yibo Zhang

doi:10.1021/acsanm.4c01185

journal article·2024-05-24

CeO₂ Nanoislands Enhance the Activity and Stability of Pt Nanoparticles Supported on Fibrous Mesoporous SiO₂ for Catalytic Combustion of Propane

Feng He, Cheng Rao, Songyun Tao, Liwei Sun, Ting Yi, Huaiyuan Wang, Bin Hu, Xiangguang Yang, Yibo Zhang

ACS Applied Nano Materials· Volume 7· Issue 10

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Source abstract

Abstract

The size of precious metal catalysts plays an important role in their activity, and inhibiting precious metal aggregation or even sintering is a major challenge in practical industrial applications. Herein, the physical limitation of fibrous mesoporous silica (KCC-1) and Pt–CeO 2 interaction of CeO 2 nanoislands were designed and used to inhibit the size of Pt particles, thereby improving their intrinsic activity and thermal stability. With the introduction of CeO 2 nanoislands, the turnover frequency (TOF) value of the Pt–CeO 2 /KCC-1 catalyst for propane-catalyzed combustion at 210 °C was 1.5 times that of Pt/KCC-1 and 5.6 times that of Pt/CeO 2 . Moreover, after aging at 800 °C, Pt–CeO 2 /KCC-1 showed enhanced thermal stability compared with Pt/KCC-1 due to the smaller change in the Pt size. Through comprehensive characterization and research of the reaction mechanism, the results indicate that due to the Pt–CeO 2 interaction, the Pt species were confined to the middle of the CeO 2 nanoisland, which was further separated by fiber sheets of KCC-1, to advance the activity and thermal stability of the catalyst. The strategy of the nanoisland in this paper provides guidance for designing better catalysts for other harsh reaction conditions.

Source: openalex_inverted_index · Quality: baseline

Research context

Ceramics & glasses Nanomaterials Catalysis & surfaces

OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions · Luminescence Properties of Advanced Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Rare Earths, University of Science and Technology of China, Hefei 230026, China

Ganjiang Innovation Academy/Jiangxi Institute of Rare Earths, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

College of Automotive Engineering, Yancheng Institute of Technology, Yancheng 224051, China

Key Laboratory of Rare Earths, Chinese Academy of Sciences, Ganzhou 341000, China

Funding

National Key Research and Development Program of China · Double Thousand Plan of Jiangxi Province · Key Research and Development Program of Jiangxi Province · Science Fund for Distinguished Young Scholars of Jiangxi Province · Youth Innovation Promotion Association of the Chinese Academy of Sciences · Ganjiang Innovation Academy, Chinese Academy of Sciences · National Natural Science Foundation of China · Natural Science Foundation of Jiangxi Province

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