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Synthesize Rh-Pt nanoparticles with core-shell, alloy, and monometallic architectures to evaluate their catalytic performance in the preferential oxidation of carbon monoxide in hydrogen feeds.

December 3, 2008Journal of the American Chemical Society

Rh−Pt Bimetallic Catalysts: Synthesis, Characterization, and Catalysis of Core−Shell, Alloy, and Monometallic Nanoparticles

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Authors

SASelim AlayoǧluNorthwestern University BEBryan W. EichhornPark University

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Implication

Comparative experimental study reveals superior low-temperature carbon monoxide oxidation in core-shell rhodium-platinum nanoparticles, indicating architecture optimizes catalytic performance.

Key Points

Synthesize Rh-Pt nanoparticles with core-shell, alloy, and monometallic architectures to evaluate their catalytic performance in the preferential oxidation of carbon monoxide in hydrogen feeds.
Synthesized Rh@Pt core-shell, RhPt (1:1) alloy, and monometallic nanoparticles using polyol reduction in ethylene glycol with polyvinylpyrrolidone stabilizers, supported on Al2O3 with 1.0 wt % Pt loadings.
Characterized structural properties of Rh cores (2.7, 3.3, and 3.9 nm) with 1–2 monolayer shells using TEM, single-particle EDS, XRD, Debye simulations, FT-IR, and micro-Raman CO-probe experiments.
Rh@Pt core-shell catalysts exhibited the highest catalytic activity in hydrogen feeds with 0.2% CO and 0.5% O2, achieving complete CO oxidation at 70 °C.
Rh@Pt core-shell nanoparticles demonstrated high preferential oxidation selectivity at 40 °C with 50% CO conversion, outperforming alloy and monometallic configurations.

Cite This Study

Alayoǧlu et al. (2008) studied this question.

synapsesocial.com/papers/6a7071988031ec7bb1dc57aa https://doi.org/10.1021/ja8061425

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Implication

Comparative experimental study reveals superior low-temperature carbon monoxide oxidation in core-shell rhodium-platinum nanoparticles, indicating architecture optimizes catalytic performance.

Rh−Pt Bimetallic Catalysts: Synthesis, Characterization, and Catalysis of Core−Shell, Alloy, and Monometallic Nanoparticles

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Cite This Study

Rh−Pt Bimetallic Catalysts: Synthesis, Characterization, and Catalysis of Core−Shell, Alloy, and Monometallic Nanoparticles

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Cite This Study

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