Aqueous phase reforming (APR) of ethanol has been studied over a series of Ru and Pt catalysts supported on carbon and titania, with different metal loadings and particle sizes. This study proposed that, on both metals, ethanol is first dehydrogenated to acetaldehyde, which subsequently undergoes CC cleavage followed by different paths, depending on the catalyst used. For instance, although monometallic Pt has high selectivity toward H₂ via dehydrogenation, it has a low efficiency for CC cleavage, lowering the overall H₂ yield. Large Ru particles produce CH₄ through methanation, which is undesirable because it consumes H₂. Small Ru particles have lower activity but higher selectivity toward H₂ rather than CH₄. On these small particles, CO blocks low‐coordination sites, inhibiting methanation. The combination of the two metals in bimetallic Ru–Pt catalysts results in improved performance, benefiting from the desirable properties of each Ru and Pt, without the negative effects of either. © 2018 American Institute of Chemical Engineers AIChE J, 65: 151–160, 2019

中文翻译：

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协同双金属Ru-Pt催化剂用于乙醇的低温水相重整

乙醇的水相重整（APR）已在一系列负载在碳和二氧化钛上的Ru和Pt催化剂上进行了研究，具有不同的金属负载量和粒径。这项研究提出，在两种金属上，首先将乙醇脱氢为乙醛，然后根据所用催化剂的不同，先进行CC裂解，然后通过不同的途径进行裂解。例如，虽然单金属的Pt具有朝向H高选择性₂经由脱氢，它具有对C的低效率 Ç裂解，降低整体ħ ₂收率。大的Ru粒子通过甲烷化产生CH ₄，这是不希望的，因为它消耗了H _2。。较小的Ru粒子具有较低的活性，但对H ₂而不是CH _4的选择性更高。在这些小颗粒上，CO会阻止低配位位点，从而抑制甲烷化。两种金属在Ru-Pt双金属催化剂中的结合可提高性能，这得益于Ru和Pt各自的理想性能，而不会产生任何不利影响。©2018美国化学工程师学会AIChE J，65：151–160，2019