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Selective vapor-phase doping of Pt nanoparticles into phase-controlled nanoalloys

Nithin Poonkottil (UGent) , Ranjith Karuparambil Ramachandran (UGent) , Eduardo Solano Minuesa (UGent) , Nadadur Veeraraghavan Srinath (UGent) , Ji-Yu Feng, Andreas Werbrouck (UGent) , Michiel Van Daele, Matthias Filez (UGent) , Matthias Minjauw (UGent) , Hilde Poelman (UGent) , et al.
(2022) JOURNAL OF PHYSICAL CHEMISTRY C. 126(3). p.1426-1438
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Abstract
Bimetallic nanoparticles (BMNPs) are frontrunners in various fields including heterogeneous catalysis, medicinal applications, and medical imaging. Tailoring their properties requires adequate control over their structure and composition, which still presents a non-trivial endeavor. We present a flexible strategy to deposit phase-controlled BMNPs by vapor-phase “titration” of a secondary metal to a pre-deposited monometallic nanoparticle (NP) host. The strategy is exemplified for archetypal Pt–Sn BMNPs but transferrable to other BMNPs which alloy noble and non-noble metals. When exposing Pt NPs on a SiO2 support to discrete TDMASn (tetrakis(dimethylamino)tin) vapor pulses from 150 to 300 °C, TDMASn selectively decomposes on Pt NPs. This leads to saturated infiltration of Sn into Pt NPs through reactive solid-state diffusion, resulting in the formation of Pt–Sn BMNPs with phase/composition control via the substrate temperature. An additional H2 pulse after each TDMASn pulse removes the surface ligands and excess Sn on the surface as SnH4, preserving the small sizes of the pre-deposited Pt NPs. This approach provides a single-step, selective “vapor-phase conversion” of Pt NPs into PtxSny BMNPs with great potential for catalysis. Hereto, a proof of concept is provided by converting wet impregnated Pt NPs into Pt–Sn BMNPs on high surface area supports.
Keywords
Surfaces, Coatings and Films, Physical and Theoretical Chemistry, General Energy, Electronic, Optical and Magnetic Materials, ATOMIC LAYER DEPOSITION, SN BIMETALLIC NANOPARTICLES, N-BUTANE, CATALYSTS, DEHYDROGENATION, PT/MG(GA)(AL)O, PERFORMANCE, CHEMISTRY, OXIDATION, PLATINUM

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MLA
Poonkottil, Nithin, et al. “Selective Vapor-Phase Doping of Pt Nanoparticles into Phase-Controlled Nanoalloys.” JOURNAL OF PHYSICAL CHEMISTRY C, vol. 126, no. 3, 2022, pp. 1426–38, doi:10.1021/acs.jpcc.1c10143.
APA
Poonkottil, N., Karuparambil Ramachandran, R., Solano Minuesa, E., Nadadur Veeraraghavan Srinath, Feng, J.-Y., Werbrouck, A., … Dendooven, J. (2022). Selective vapor-phase doping of Pt nanoparticles into phase-controlled nanoalloys. JOURNAL OF PHYSICAL CHEMISTRY C, 126(3), 1426–1438. https://doi.org/10.1021/acs.jpcc.1c10143
Chicago author-date
Poonkottil, Nithin, Ranjith Karuparambil Ramachandran, Eduardo Solano Minuesa, Nadadur Veeraraghavan Srinath, Ji-Yu Feng, Andreas Werbrouck, Michiel Van Daele, et al. 2022. “Selective Vapor-Phase Doping of Pt Nanoparticles into Phase-Controlled Nanoalloys.” JOURNAL OF PHYSICAL CHEMISTRY C 126 (3): 1426–38. https://doi.org/10.1021/acs.jpcc.1c10143.
Chicago author-date (all authors)
Poonkottil, Nithin, Ranjith Karuparambil Ramachandran, Eduardo Solano Minuesa, Nadadur Veeraraghavan Srinath, Ji-Yu Feng, Andreas Werbrouck, Michiel Van Daele, Matthias Filez, Matthias Minjauw, Hilde Poelman, Alessandro Coati, Christophe Detavernier, and Jolien Dendooven. 2022. “Selective Vapor-Phase Doping of Pt Nanoparticles into Phase-Controlled Nanoalloys.” JOURNAL OF PHYSICAL CHEMISTRY C 126 (3): 1426–1438. doi:10.1021/acs.jpcc.1c10143.
Vancouver
1.
Poonkottil N, Karuparambil Ramachandran R, Solano Minuesa E, Nadadur Veeraraghavan Srinath, Feng J-Y, Werbrouck A, et al. Selective vapor-phase doping of Pt nanoparticles into phase-controlled nanoalloys. JOURNAL OF PHYSICAL CHEMISTRY C. 2022;126(3):1426–38.
IEEE
[1]
N. Poonkottil et al., “Selective vapor-phase doping of Pt nanoparticles into phase-controlled nanoalloys,” JOURNAL OF PHYSICAL CHEMISTRY C, vol. 126, no. 3, pp. 1426–1438, 2022.
@article{8734279,
  abstract     = {{Bimetallic nanoparticles (BMNPs) are frontrunners in various fields including heterogeneous catalysis, medicinal applications, and medical imaging. Tailoring their properties requires adequate control over their structure and composition, which still presents a non-trivial endeavor. We present a flexible strategy to deposit phase-controlled BMNPs by vapor-phase “titration” of a secondary metal to a pre-deposited monometallic nanoparticle (NP) host. The strategy is exemplified for archetypal Pt–Sn BMNPs but transferrable to other BMNPs which alloy noble and non-noble metals. When exposing Pt NPs on a SiO2 support to discrete TDMASn (tetrakis(dimethylamino)tin) vapor pulses from 150 to 300 °C, TDMASn selectively decomposes on Pt NPs. This leads to saturated infiltration of Sn into Pt NPs through reactive solid-state diffusion, resulting in the formation of Pt–Sn BMNPs with phase/composition control via the substrate temperature. An additional H2 pulse after each TDMASn pulse removes the surface ligands and excess Sn on the surface as SnH4, preserving the small sizes of the pre-deposited Pt NPs. This approach provides a single-step, selective “vapor-phase conversion” of Pt NPs into PtxSny BMNPs with great potential for catalysis. Hereto, a proof of concept is provided by converting wet impregnated Pt NPs into Pt–Sn BMNPs on high surface area supports.}},
  author       = {{Poonkottil, Nithin and Karuparambil Ramachandran, Ranjith and Solano Minuesa, Eduardo and Nadadur Veeraraghavan Srinath and Feng, Ji-Yu and Werbrouck, Andreas and Van Daele, Michiel and Filez, Matthias and Minjauw, Matthias and Poelman, Hilde and Coati, Alessandro and Detavernier, Christophe and Dendooven, Jolien}},
  issn         = {{1932-7447}},
  journal      = {{JOURNAL OF PHYSICAL CHEMISTRY C}},
  keywords     = {{Surfaces,Coatings and Films,Physical and Theoretical Chemistry,General Energy,Electronic,Optical and Magnetic Materials,ATOMIC LAYER DEPOSITION,SN BIMETALLIC NANOPARTICLES,N-BUTANE,CATALYSTS,DEHYDROGENATION,PT/MG(GA)(AL)O,PERFORMANCE,CHEMISTRY,OXIDATION,PLATINUM}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{1426--1438}},
  title        = {{Selective vapor-phase doping of Pt nanoparticles into phase-controlled nanoalloys}},
  url          = {{http://dx.doi.org/10.1021/acs.jpcc.1c10143}},
  volume       = {{126}},
  year         = {{2022}},
}
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