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- W2372180546 abstract "Catalytically grown carbon nanofibres were treated with a mixture of concentrated nitric and sulphuric acids at different temperatures.The effects of the oxidation treatment on the graphite structure and texture properties were studied by X-ray diffraction and N_(2)-physisorption.The formation of the surface oxygen-containing groups on the surface of the carbon nanofibers was investigated by DRIFT FTIR and the ion-exchange method.The Pd-Pt catalysts supported on the fresh and treated carbon nanofibres were prepared with the incipient wetness impregnation method.The Pd-Pt metal dispersion and the interaction of them with the carriers were studied by the pulses of hydrogen,the high-resolution electron microscopy and the TPR-FTIR.The results demonstrated that there were no clear changes of the bulk structure and the texture properties of carbon nanofibers after the treatment in the mixed acids below 150 ℃.The concentration of the formed oxygen-containing surface groups increased with raising the treatment temperatures and it could produce a pronounced promoting effect in the dispersion of metal in the carbon nanofibers.The mechanism of the role of the surface oxygen-containing groups in improving the dispersion of Pd-Pt particles was also discussed." @default.
- W2372180546 created "2016-06-24" @default.
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- W2372180546 date "2006-01-01" @default.
- W2372180546 modified "2023-09-25" @default.
- W2372180546 title "Effects of Surface Oxidation of Carbon Nanofibers in Mixed Concentrated HNO_3-H_2SO_4 Acid Solution on Dispersion State of Supported Pd-Pt Catalyst Particles" @default.
- W2372180546 hasPublicationYear "2006" @default.
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