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Journal Article 4

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2021 2

2017 2

Keywords

5-hydroxymethyl-2-furfural 1

CePO₄ 1

Composites 1

EXAFS 1

N₂O decomposition 1

Nanocatalysts 1

Organic contaminants 1

Photodegradation 1

Pt nanoparticle 1

Rh₂O₃ 1

Wood 1

X-ray absorption spectroscopy 1

XANES 1

aerobic oxidation 1

base-free 1

core shell 1

nanocatalysts 1

thermoresponsive block copolymer 1

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Thermoresponsive block copolymer supported Pt nanocatalysts for base-free aerobic oxidation of 5-hydroxymethyl

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6, Pages 1514-1523 doi: 10.1007/s11705-021-2092-4

Abstract: The Pt nanocatalysts were well-dispersed and highly active for the base-free oxidation of 5-hydroxymethyl

Keywords： aerobic oxidation base-free 5-hydroxymethyl-2-furfural Pt nanoparticle thermoresponsive block copolymer

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Rh₂O₃/hexagonal CePO₄ nanocatalysts for N₂O decomposition

Huan Liu, Zhen Ma

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 4, Pages 586-593 doi: 10.1007/s11705-017-1659-6

Abstract: Hexagonal CePO nanorods were prepared by a precipitation method and hexagonal CePO nanowires were prepared by hydrothermal synthesis at 150 °C. Rh(NO ) was then used as a precursor for the impregnation of Rh O onto these CePO materials. The Rh O supported on the CePO nanowires was much more active for the catalytic decomposition of N O than the Rh O supported on CePO nanorods. The stability of both catalysts as a function of time on stream was studied and the influence of the co-feed (CO , O , H O or O /H O) on the N O decomposition was also investigated. The samples were characterized by N adsorption-desorption, inductively coupled plasma optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron microscopy, hydrogen temperature-programmed reduction, oxygen temperature-programmed desorption, and CO temperature-programmed desorption in order to correlate the physicochemical and catalytic properties.

Keywords： Rh₂O₃ CePO₄ N₂O decomposition

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Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic environment

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1346-6

Abstract:

•Wood and its reassemblies are ideal substrates to develop novel photocatalysts.

Keywords： Wood Nanocatalysts Photodegradation Organic contaminants Composites

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Design of efficient Pt-based electrocatalysts through characterization by X-ray absorption spectroscopy

Nebojsa S. MARINKOVIC, Kotaro SASAKI, Radoslav R. ADZIC

Frontiers in Energy 2017, Volume 11, Issue 3, Pages 236-244 doi: 10.1007/s11708-017-0487-1

Abstract: A method is described to determine the internal structure of electrocatalyst nanoparticles by X-ray absorption spectroscopy (XAS). The nondestructive spectroscopic technique typically utilizing synchrotron radiation as the source measures changes in the X-ray absorption coefficient as a function of energy. The bulk technique has found its use for materials characterization in all scientific areas, including nanomaterials. The analysis of the internal structure of nanoparticles reveals interatomic distances and coordination numbers for each element, and their values and mutual relations indicate whether the elements form a homogeneous or heterogeneous mixture. The core-shell heterogeneous structure in which certain elements are predominantly located in the core, and others form the encapsulating shell is of particular importance in catalysis and electrocatalysis because it may reduce the amount of precious metals in nanoparticles by replacing the atoms in the core of nanoparticles with more abundant and cheaper alternatives. The examples of nanoparticle structures designed in the laboratory and the approach to model efficient catalysts through systematic analysis of XAS data in electrochemical systems consisting of two and three metals are also demonstrated.

Keywords： X-ray absorption spectroscopy EXAFS XANES nanocatalysts core shell