Rh−Pt Bimetallic Catalysts: Synthesis, Characterization, and Catalysis of Core−Shell, Alloy, and Monometallic Nanoparticles. Alayoglu, S. & Eichhorn, B. Journal of the American Chemical Society, 130(51):17479--17486, December, 2008. ![Rh−Pt Bimetallic Catalysts: Synthesis, Characterization, and Catalysis of Core−Shell, Alloy, and Monometallic Nanoparticles [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Rh@Pt core−shell, RhPt (1:1) alloy, and Rh + Pt monometallic nanoparticles (NPs) were prepared using standard polyol reduction chemistry in ethylene glycol (EG) with standard inorganic salts and polyvinylpyrrolidine (PVP55000) stabilizers. PVP-free colloids were also prepared but less stable than the PVP-protected NPs. Rh@Pt core−shell particles were prepared from 2.7, 3.3, and 3.9 nm Rh cores with varying shell thicknesses (∼1 and ∼2 ML). The particles were characterized by a combination of TEM, single-particle EDS, EDS line scans, XRD analysis, Debye Function simulations, FT-IR, and micro-Raman CO-probe experiments. The three different architectures were evaluated for preferential oxidation of CO in hydrogen (PROX) using 1.0 wt % Pt loadings in Al2O3 supports. For hydrogen feeds with 0.2% CO and 0.5% O2 the Rh@Pt NP catalyst has the best activity with complete CO oxidation at 70 °C and very high PROX selectivity at 40 °C with 50% CO conversion.
@article{alayoglu_rhpt_2008,
title = {Rh−{Pt} {Bimetallic} {Catalysts}: {Synthesis}, {Characterization}, and {Catalysis} of {Core}−{Shell}, {Alloy}, and {Monometallic} {Nanoparticles}},
volume = {130},
shorttitle = {Rh−{Pt} {Bimetallic} {Catalysts}},
url = {http://dx.doi.org/10.1021/ja8061425},
doi = {10.1021/ja8061425},
abstract = {Rh@Pt core−shell, RhPt (1:1) alloy, and Rh + Pt monometallic nanoparticles (NPs) were prepared using standard polyol reduction chemistry in ethylene glycol (EG) with standard inorganic salts and polyvinylpyrrolidine (PVP55000) stabilizers. PVP-free colloids were also prepared but less stable than the PVP-protected NPs. Rh@Pt core−shell particles were prepared from 2.7, 3.3, and 3.9 nm Rh cores with varying shell thicknesses (∼1 and ∼2 ML). The particles were characterized by a combination of TEM, single-particle EDS, EDS line scans, XRD analysis, Debye Function simulations, FT-IR, and micro-Raman CO-probe experiments. The three different architectures were evaluated for preferential oxidation of CO in hydrogen (PROX) using 1.0 wt \% Pt loadings in Al2O3 supports. For hydrogen feeds with 0.2\% CO and 0.5\% O2 the Rh@Pt NP catalyst has the best activity with complete CO oxidation at 70 °C and very high PROX selectivity at 40 °C with 50\% CO conversion.},
number = {51},
urldate = {2009-08-06TZ},
journal = {Journal of the American Chemical Society},
author = {Alayoglu, Selim and Eichhorn, Bryan},
month = dec,
year = {2008},
pages = {17479--17486}
}
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