Alumina-supported sub-nanometer Pt10 clusters: Amorphization and role of the support material in a highly active CO oxidation catalyst

Yin, Chunrong; Negreiros, Fabio R.; Barcaro, Giovanni; Beniya, Atsushi; Sementa, Luca; Tyo, Eric C.; Bartling, Stephan; Meiwes-Broer, Karl-Heinz; Seifert, Sönke; Hirata, Hirohito; Isomura, Noritake; Nigam, Sandeep; Majumder, Chiranjib; Watanabe, Yoshihide; Fortunelli, Alessandro; Vajda, Stefan

doi:10.1039/c6ta10989f

Title: Alumina-supported sub-nanometer Pt₁₀ clusters: Amorphization and role of the support material in a highly active CO oxidation catalyst

Journal Article · Fri Feb 03 00:00:00 EST 2017 · Journal of Materials Chemistry. A

DOI:https://doi.org/10.1039/c6ta10989f· OSTI ID:1352556

Yin, Chunrong ^[1]; Negreiros, Fabio R. ^[2]; Barcaro, Giovanni ^[2]; Beniya, Atsushi ^[3]; Sementa, Luca ^[2]; Tyo, Eric C. ^[1]; Bartling, Stephan ^[4]; Meiwes-Broer, Karl-Heinz ^[4]; Seifert, Sönke ^[1]; Hirata, Hirohito ^[5]; Isomura, Noritake ^[3]; Nigam, Sandeep ^[6]; Majumder, Chiranjib ^[6];

^[3];

^[7]; Vajda, Stefan ^[1]

Argonne National Lab. (ANL), Lemont, IL (United States)
Consiglio Nazionale delle Ricerche, Pisa (Italy)
Toyota Central R&D Labs. Inc., Nagakute (Japan)
Univ. Rostock, Rostock (Germany)
Toyota Motor Corp., Susono (Japan)
Bhabha Atomic Research Centre, Mumbai (India)
Consiglio Nazionale delle Ricerche, Pisa (Italy); California Inst. of Technology (CalTech), Pasadena, CA (United States)

Catalytic CO oxidation is unveiled on size-selected Pt₁₀ clusters deposited on two very different ultrathin (≈0.5–0.7 nm thick) alumina films: (i) a highly ordered alumina obtained under ultra-high vacuum (UHV) by oxidation of the NiAl(110) surface and (ii) amorphous alumina obtained by atomic layer deposition (ALD) on a silicon chip that is a close model of real-world supports. Notably, when exposed to realistic reaction conditions, the Pt₁₀/UHV-alumina system undergoes a morphological transition in both the clusters and the substrate, and becomes closely akin to Pt₁₀/ALD-alumina, thus reconciling UHV-type surface-science and real-world experiments. The Pt₁₀ clusters, thoroughly characterized via combined experimental techniques and theoretical analysis, exhibit among the highest CO oxidation activity per Pt atom reported for CO oxidation catalysts, due to the interplay of ultra-small size and support effects. Lastly, a coherent interdisciplinary picture then emerges for this catalytic system.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1352556

Journal Information:: Journal of Materials Chemistry. A, Vol. 5, Issue 10; ISSN 2050-7488

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 59 works

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
CO oxidation
DFT calculations
HV and atmospheric pressure conditions
amorphous and crystalline alumina
subnanometer Pt clusters

Title: Alumina-supported sub-nanometer Pt10 clusters: Amorphization and role of the support material in a highly active CO oxidation catalyst

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Title: Alumina-supported sub-nanometer Pt₁₀ clusters: Amorphization and role of the support material in a highly active CO oxidation catalyst