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首页> 外文期刊>RSC Advances >Aqueous phase reforming of ethylene glycol on Pt/CeO2-ZrO2: effects of cerium to zirconium molar ratio
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Aqueous phase reforming of ethylene glycol on Pt/CeO2-ZrO2: effects of cerium to zirconium molar ratio

机译：乙二醇在Pt / CeO2-ZrO2上的水相重整：铈锆摩尔比的影响

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摘要

The aqueous-phase reforming (APR) reaction of ethylene glycol was investigated on platinum-supported CeO2-ZrO2 mixed oxides with different molar ratios of Ce/(Ce + Zr). The main role of the molar ratio of Ce/(Ce + Zr) on the CeO2-ZrO2 mixed oxides was found to be to alter the dispersion of active platinum crystallites and concomitantly change the hydrogen productivity and stability. The different amounts of surface oxygen species on the defect sites of CeO2-ZrO2 altered the dispersion of platinum crystallites and changed the metal-support interactions between the nano-scale platinum crystallites and the oxygen vacancy defect sites on the CeO2-ZrO2. A larger dispersion of platinum crystallites and a larger surface area were observed for the Pt/CeO2-ZrO2 having a Ce/(Ce + Zr) molar ratio of 4 : 6, and the catalyst showed a higher conversion of ethylene glycol to hydrogen by forming thermally stable platinum crystallites through their strong interactions with the defect sites of the CeO2-ZrO2 surface.
机译：在具有不同摩尔比的Ce /（Ce + Zr）的铂负载CeO2-ZrO2混合氧化物上研究了乙二醇的水相重整（APR）反应。发现Ce /（Ce + Zr）摩尔比对CeO2-ZrO2混合氧化物的主要作用是改变活性铂微晶的分散性，并同时改变氢的生产率和稳定性。 CeO2-ZrO2缺陷位点上表面氧种类的不同改变了铂微晶的分散，改变了纳米级铂微晶与CeO2-ZrO2上的氧空位缺陷位点之间的金属-载体相互作用。 Ce /（Ce + Zr）摩尔比为4：6的Pt / CeO2-ZrO2观察到铂微晶的分散度较大和表面积较大，并且催化剂通过形成四氟乙烯显示出更高的乙二醇向氢的转化率热稳定的铂微晶通过与CeO2-ZrO2表面缺陷位点的强相互作用而形成。

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