| The catalyst of noble metal Pt had a wide range of applications in petroleum, chemical industry, energy and so on. The research expounded the applied process of Pt in the automotive catalysts as well as the production and applications of hydrogen energy, were expounded from the status of energy and the environment. We further discussed the restricting factors of catalyst Pt in the research and application, such as the service time, stability and performance to price ratio and so on.The researches focused on the lower quantity, the greater catalytic activity and stability.At present, in the Pt-M alloy catalyst study, the transition metals included Ru, Fe, Co, Ni, Os, etc, all showed the outstanding performance. That because the transition metal doped with Pt phase formation the alloy, in the alloying process, the d cavitation of transition metal, made the catalytic phase to have a key ability bonded the outside electronic or adsorption species, which improved the catalytic reaction activity.Meanwhile,the study in Rare earth fertilizer also drawed wider attention. Rare earth oxidation showed excellent synergy effect when mixed with the noble metal and transition metals. The published synergy effect included:increasing the absorption and evolution of oxygen, aggrandizing the liquidity of lattice oxygen, and the thermal stability and stabilizing the valence states of oxidation in other metal ion augmenting. And yet, the function mechanism of rare earth sub-catalyst did not reach a consensus. So, This article aimed at the research doped with transition metal Cu and sub-catalyst LaOx.In the test, successfully prepared the platinum-based catalytic samples with carbon or silicon carrier and doped ceria or Cu,by Ion beam sputtering method which belong to PVD technology through the equipment of "multi-purpose high vacuum ion beam sputtering and electron beam evaporation coating machine". The structure and composition of the membrane electrodes were configurated by EDS and XRD, used SEM and HRTEM to observe surface morphology, analysed film surface composition and chemical characterization of the valence by XPS and the activity of hydrogen evolution in electrode was tested by cyclic voltammetry. The paper main work included the following aspects:(1) In the research for the influence of Cu elements doping to Pt catalytic membrane, successfully preparated samples with different alloying degree of Cu element, through the controlled of Cu elements of doping and different annealing temperature. The function of catalytic reaction activity in the process of alloying are discussed. The result is that the Pt-Cu binary alloy samples with high degree of alloying showed more excellent electrochemical performance in the evolution of hydrogen.(2) In the test,using dilute acids cooked the sample of Pt-Cu alloy preparated by PVD technology to achieve de-alloyed during the surface layer. Through the exploration of acid treatment process, initially completed the preparation of the Pt-Cu core and shell structure, the partly de-alloyed sample configurated by HRTEM,we saw the tightened shell coated with Pt-Cu alloy core.The analysis in CV and LSV showed excellent catalytic reaction activity. This paper provided a useful exploration to reduce the appropriateness of Pt and further improve performance research.(3) For rare earth LaOx's study, Pt-LaOx's carrier membrane samples were preparated through the way of doping deposition with close contact distance between the elements. The XPS study found that, Pt transfer electronic to LaOx in the interaction of La and Pt,and in the membrane surface have a lot of O-ions. This reaction was similar with the O space model. The function mechanism of rare earth sub-catalyst was discussed. |
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