Tuning the Placement of Pt “Single Atoms” on a Mixed CeO2–TiO2 Support

Wang, Haodong; Rui, Ning; Senanayake, Sanjaya D.; Zhang, Lihua; Li, Yuanyuan; Frenkel, Anatoly I.

doi:10.1021/acs.jpcc.2c05198

Tuning the Placement of Pt “Single Atoms” on a Mixed CeO₂–TiO₂ Support

Journal Article · Mon Sep 19 00:00:00 EDT 2022 · Journal of Physical Chemistry. C

DOI:https://doi.org/10.1021/acs.jpcc.2c05198· OSTI ID:1897496

^[1]; ^[2]; ^[2]; Zhang, Lihua ^[2]; ^[3]; ^[4]

Stony Brook Univ., NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Stony Brook Univ., NY (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

Defect sites on the oxide supports can be used to anchor and activate "single-atoms" catalysts (SACs). By engineering the anchoring sites for supporting SACs, one can alter their electronic and atomic structures which, in turn, define their activity, selectivity, and stability for catalytic reactions. To create and tune unique sites for Pt SACs on CeO₂ support, in this work, we synthesized a system consisting of CeO₂ decorated on TiO₂ nano-oxides for supporting the Pt SACs and investigated the effect of Pt weight loading. Here, a combination of multiple structural characterization methods including diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) were employed to characterize the distribution of charge states of single atoms and evaluate the heterogeneity of their binding sites. We have found that the placement of Pt atoms can be tuned on a mixed oxide surface by changing the weight loading of Pt.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division

Grant/Contract Number:: SC0012704; SC0022199

OSTI ID:: 1897496

Alternate ID(s):: OSTI ID: 1906618

Report Number(s):: BNL-223668-2022-JAAM

Journal Information:: Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 38 Vol. 126; ISSN 1932-7447

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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