Morphology-Dependent Catalytic Activity of Ru/CeO₂ in Dry Reforming of Methane

Lulu He; Yuanhang Ren; Yingyi Fu; Bin Yue; Shik Chi Edman Tsang; Heyong He

doi:10.3390/molecules24030526

Morphology-Dependent Catalytic Activity of Ru/CeO₂ in Dry Reforming of Methane

Molecules. 2019 Feb 1;24(3):526. doi: 10.3390/molecules24030526.

Authors

Lulu He¹, Yuanhang Ren², Yingyi Fu³, Bin Yue⁴, Shik Chi Edman Tsang⁵, Heyong He⁶

Affiliations

¹ Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China. 14110220027@fudan.edu.cn.
² Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China. yuanhangren@fudan.edu.cn.
³ Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China. 13110220046@fudan.edu.cn.
⁴ Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China. yuebin@fudan.edu.cn.
⁵ Wolfson Catalysis Centre, Department of Chemistry, University of Oxford, Oxford OX1 3QR, UK. edman.tsang@chem.ox.ac.uk.
⁶ Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China. heyonghe@fudan.edu.cn.

Abstract

Three morphology-controlled CeO₂, namely nanorods (NRs), nanocubes (NCs), and nanopolyhedra (NPs), with different mainly exposed crystal facets of (110), (100), and (111), respectively, have been used as supports to prepare Ru (3 wt.%) nanoparticle-loaded catalysts. The catalysts were characterized by H₂-temperature programmed reduction (H₂-TPR), CO⁻ temperature programmed desorption (CO-TPD), N₂ adsorption⁻desorption, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM) and energy-dispersive X-ray spectroscopy (XDS). The characterization results showed that CeO₂-NRs, CeO₂-NCs, and CeO₂-NPs mainly expose (110), (100) and (111) facets, respectively. Moreover, CeO₂-NRs and CeO₂-NCs present higher oxygen vacancy concentration than CeO₂-NPs. In the CO₂ reforming of methane reaction, Ru/CeO₂-NR and Ru/CeO₂-NC catalysts showed better catalytic performance than Ru/CeO₂-NPs, indicating that the catalysts with high oxygen vacancy concentration are beneficial for promoting catalytic activity.

Keywords: CeO2; carbon dioxide; crystal facets; dry reforming; methane.

MeSH terms

Adsorption
Carbon Dioxide / chemistry
Catalysis
Cerium / chemistry*
Chemistry Techniques, Synthetic*
Hydrogen / chemistry
Methane / chemistry*
Nanoparticles / chemistry*
Nanoparticles / ultrastructure
Oxidation-Reduction
Oxygen / chemistry
Ruthenium / chemistry*

Substances

Carbon Dioxide
Cerium
ceric oxide
Ruthenium
Hydrogen
Methane
Oxygen

Abstract

MeSH terms

Substances

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