[TG-FTIR and XRD spectroscopic analysis for the preparation of nitrogen-doped carbon supported cobalt electrocatalysts].

Nitrogen-doped carbon supported cobalt electrocatalysts for the reduction of oxygen were prepared from the high nitrogen content prepolymer of melamine formaldehyde resin and cobalt acetate. The preparation and structure of the electrocatalysts were investigated by TG-FTIR and XRD spectroscopic analysis methods. The electrochemical reduction of oxygen was studied at the nitrogen-doped carbon supported cobalt by using the rotating disk electrode method.

[DRIFTS study of Cu1Zr1Ce9Odelta catalysts for selective CO oxidation].

The Cu1Zr1Ce9Odelta catalysts synthesized with coprecipitation method were used into the selective CO oxidation in hydrogen-rich gas. The adsorbed species and the intermediates on Cu1Zr1Ce9Odelta catalysts were examined by in-situ diffuse reflectance FTIR spectroscopy (in-situ DRIFTS) technique. It was found that hydrogen, oxygen and CO in the feed stream were adsorbed competitively at the same adsorption sites on the surface of Cu1Zr1Ce9Odelta catalysts.

[Study on CuO-CeO2 catalysts doped with alkali and alkaline earth metal oxides by in-situ DRIFTS].

CuO-CeO2 series catalysts are the effective catalysts for the selective CO oxidation in hydrogen-rich gas. The adsorption species on the CuO-CeO2 catalysts doped with alkali and alkaline earth metal oxides were investigated with in situ diffuse reflectance FTIR spectroscopy (in-situ DRIFTS) technique. The results showed that a bane at 2 106 cm(-1), due to the carbonyl species, appeared on the CuO-CeO2 catalysts.

[UV-Vis, FTIR and XRD spectroscopic analysis for the preparation of Pt/CNTs electrocatalysts].

Carbon nanotubes (CNTs) supported platinum electrocatalyst Pt/CNTs with high dispersion were prepared by a modified ethylene glycol method with sodium dodecyl sulfate (SDS) as the stabilizer. UV-Vis, FTIR and XRD spectroscopic analysis methods were used to study the preparation of the electrocatalysts, and the effect of the SDS addition to the ethylene glycol solution on the structure as well as the electrocatalytic activity of the Pt/CNTs electrocatalysts were also investigated. The results showed that PtCl6(2-) could form a complex compound with SDS, and all PtCl6(2-) were completely reduced by ethylene glycol; oxygen containing groups were produced on the surface of CNTs to facilitate the Pt nanoparticle absorption, and no SDS remained on the electrocatalysts; the Pt/CNTs electrocatalysts exhibited face-centered cubic structure; the particle size of Pt/CNTs-2 catalyst prepared by SDS addition was about 4.

[Analysis of confined crystalline behaviors of poly(styrene)-poly(ethyleneoxide)-poly(styrene) triblock copolymers by inverse gas chromatography].

The confined crystalline behaviors of the triblock copolymers, poly(styrene)-poly(ethyleneoxide)-poly(styrene) (PS-PEO-PS), were studied by using inverse gas chromatography(IGC) probe technique, including phase-transformation of melting crystalline, crystallinity (Xc), melting temperature(Tm) and melting range of temperature. The effects of the molecule-chain length of linear alkane probes on the results are discussed. Results showed that micro-phase separation of PS-PEO-PS had a greater influence on crystallization of PEO molecule-chain.