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]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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