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首页> 美国卫生研究院文献>ACS Omega >Catalytic Performance of Ce0.6Y0.4O2-Supported Platinum Catalyst for Low-TemperatureWater–Gas Shift Reaction
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Catalytic Performance of Ce0.6Y0.4O2-Supported Platinum Catalyst for Low-TemperatureWater–Gas Shift Reaction

机译：Ce0.6Y0.4O2-担载的铂催化剂的低温催化性能水煤气变换反应

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In this study, Pt/Ce0.6Y0.4O2 catalyst was prepared using a citric sol–gel method and was used as a catalyst for a water–gas shift (WGS) reaction. Compared to 1 wt % Pt/CeO2 and Pt/Y2O3 catalysts, the Pt/Ce0.6Y0.4O2 catalyst showed a much higher WGS catalytic activity. At 250 °C, the conversion of carbon monoxide was 86.35% at a weight hourly space velocity of 30 000 cm3 gcat–1 h–1. The physicochemical properties of the catalysts were investigated via X-ray diffraction, transmission electron microscopy, chemisorption, H2 and CO temperature-programmed reduction, and in situ diffuse reflection infrared Fourier transform spectroscopy. These results confirmed that the catalytic activity did not depend on the dispersion and particle size of platinum. The high reducibility of the Ce0.6Y0.4O2 support plays a crucial role in improving the activity of the Pt/Ce0.6Y0.4O2 catalyst, and this improvement can also be explained by the reduction in CO adsorption strength.
机译：在这项研究中，Pt / Ce0.6Y0.4O2催化剂是使用柠檬酸溶胶-凝胶法制备的，并用作水煤气变换（WGS）反应的催化剂。与1wt％的Pt / CeO2和Pt / Y2O3催化剂相比，Pt / Ce0.6Y0.4O2催化剂显示出更高的WGS催化活性。在250°C下，时空速度为30 000 cm 3 gcat –1 h -1 。通过X射线衍射，透射电子显微镜，化学吸附，H2和CO程序升温还原以及原位漫反射红外傅里叶变换光谱研究了催化剂的理化性质。这些结果证实，催化活性不取决于铂的分散度和粒径。 Ce0.6Y0.4O2载体的高还原性在提高Pt / Ce0.6Y0.4O 2 催化剂的活性中起着至关重要的作用，这种改善也可以通过减少CO来解释。吸附强度。

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