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Enhancing the partial oxidation of gasoline with Mo-doped Ni catalysts for SOFC applications: An integrated experimental and DFT study
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.apcatb.2020.118626
Qusay Bkour , Fanglin Che , Kyung-Min Lee , Chen Zhou , Nusnin Akter , Jorge Anibal Boscoboinik , Kai Zhao , Jake T. Gray , Steven R. Saunders , M. Grant Norton , Jean-Sabin McEwen , Taejin Kim , Su Ha

We introduce a small amount of Mo atoms into Ni/YSZ catalyst for the partial oxidation reaction of gasoline. Ni-Mo/YSZ catalyst displays a high reforming activity and stability with an isooctane conversion of 90% and H2 yield of 76% with less degree of coking and sintering compared to Ni/YSZ catalyst. Our XRD results indicate that a Ni-Mo solid solution is formed. Raman results also suggest that a presence of well dispersed Mo = O species over Ni surface can be a possible active site that is related to the high coke resistance of Ni-Mo/YSZ catalyst. DFT-based calculations indicate that Ni-Mo/YSZ catalysts enhance the carbon-tolerance by increasing activation barriers for the C-H bond cleavage and C-C coupling as compared with the Ni/YSZ system. Ni-Mo catalyst is used as an internal micro-reforming layer on top of conventional Ni-YSZ anode supported single cells. The single cell displays a significantly improved stability with a low degradation rate.



中文翻译:

用于SOFC应用的Mo掺杂Ni催化剂增强汽油的部分氧化:综合实验和DFT研究

我们将少量的Mo原子引入Ni / YSZ催化剂中,用于汽油的部分氧化反应。Ni-Mo / YSZ催化剂具有很高的重整活性和稳定性,异辛烷转化率为90%,H 2为与Ni / YSZ催化剂相比,焦化和烧结度更低,收率为76%。我们的XRD结果表明形成了Ni-Mo固溶体。拉曼结果还表明,在Ni表面上存在良好分散的Mo = O物种可能是可能的活性位点,这与Ni-Mo / YSZ催化剂的高耐焦炭性有关。基于DFT的计算表明,与Ni / YSZ系统相比,Ni-Mo / YSZ催化剂通过增加CH键断裂和CC偶联的活化势垒来提高碳耐受性。Ni-Mo催化剂用作常规Ni-YSZ阳极负载单电池顶部的内部微重整层。单电池显示出显着改善的稳定性,且降解率低。

更新日期:2020-01-14
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