Templated encapsulation of platinum-based catalysts promotes high-temperature stability to 1,100 °C

Aitbekova, Aisulu; Zhou, Chengshuang; Stone, Michael L.; Lezama-Pacheco, Juan Salvador; Yang, An-Chih; Hoffman, Adam S.; Goodman, Emmett D.; Huber, Philipp; Stebbins, Jonathan F.; Bustillo, Karen C.; Ercius, Peter; Ciston, Jim; Bare, Simon R.; Plessow, Philipp N.; Cargnello, Matteo

doi:10.1038/s41563-022-01376-1

Templated encapsulation of platinum-based catalysts promotes high-temperature stability to 1,100 °C

Journal Article · Mon Oct 24 00:00:00 EDT 2022 · Nature Materials

DOI:https://doi.org/10.1038/s41563-022-01376-1· OSTI ID:1961350

Aitbekova, Aisulu ^[1]; Zhou, Chengshuang ^[1]; Stone, Michael L. ^[1]; Lezama-Pacheco, Juan Salvador ^[2]; Yang, An-Chih ^[1]; ^[3]; Goodman, Emmett D. ^[1]; Huber, Philipp ^[4]; Stebbins, Jonathan F. ^[2]; ^[5]; ^[5]; ^[5]; ^[3]; Plessow, Philipp N. ^[4]; ^[1]

Stanford Univ., CA (United States). SUNCAT Center for Interface Science and Catalysis
Stanford Univ., CA (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Karlsruhe Inst. of Technology (KIT) (Germany)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry

Stable catalysts are essential to address energy and environmental challenges, especially for applications in harsh environments (for example, high temperature, oxidizing atmosphere and steam). In such conditions, supported metal catalysts deactivate due to sintering-a process where initially small nanoparticles grow into larger ones with reduced active surface area-but strategies to stabilize them can lead to decreased performance. In this work, we report stable catalysts prepared through the encapsulation of platinum nanoparticles inside an alumina framework, which was formed by depositing an alumina precursor within a separately prepared porous organic framework impregnated with platinum nanoparticles. These catalysts do not sinter at 800 °C in the presence of oxygen and steam, conditions in which conventional catalysts sinter to a large extent, while showing similar reaction rates. Extending this approach to Pd-Pt bimetallic catalysts led to the small particle size being maintained at temperatures as high as 1,100 °C in air and 10% steam. This strategy can be broadly applied to other metal and metal oxides for applications where sintering is a major cause of material deactivation.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES), Scientific User Facilities Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); National Science Foundation (NSF)

Grant/Contract Number:: AC02-05CH11231; AC02-76SF00515

OSTI ID:: 1961350

Journal Information:: Nature Materials, Journal Name: Nature Materials Journal Issue: 11 Vol. 21; ISSN 1476-1122

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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