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首页> 外文期刊>ACS applied materials & interfaces >Integrated Experimental-Theoretical Approach To Determine Reliable Molecular Reaction Mechanisms on Transition-Metal Oxide Surfaces
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Integrated Experimental-Theoretical Approach To Determine Reliable Molecular Reaction Mechanisms on Transition-Metal Oxide Surfaces

机译:综合实验理论方法确定过渡 - 金属氧化物表面可靠的分子反应机制

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摘要

By combining experimental and theoretical approaches, we investigate the quantitative relationship between molecular desorption temperature and binding energy on d and f metal oxide surfaces. We demonstrate how temperature-programmed desorption can be used to quantitatively correlate the theoretical surface chemistry of metal oxides (via on-site Hubbard U correction) to gas surface interactions for catalytic reactions. For this purpose, both CO and NO oxidation mechanisms are studied in a step-by-step reaction process for perovskite and mullite-type oxides, respectively. Additionally, we show solutions for over-binding issues found in COx, NOx, SOx, and other covalently bonded molecules that must be considered during surface reaction modeling. This work shows the high reliability of using TPD and density functional theory in conjunction to create accurate surface chemistry information for a variety of correlated metal oxide materials.
机译:通过组合实验和理论方法,我们研究了D和F金属氧化物表面的分子解吸温度与结合能的定量关系。 我们展示了温度编程的解吸方式如何用于定量地将金属氧化物的理论表面化学(通过现场的Hubbard U校正)与催化反应的气体表面相互作用相关。 为此目的,分别在钙钛矿和莫来石型氧化物的逐步反应方法中研究了CO和NO氧化机制。 此外,我们表明了在表面反应建模期间必须考虑的COX,NOx,SOX和其他共价键合分子中发现的过结合问题的解。 这项工作表明,使用TPD和密度泛函理论的高可靠性结合以创建各种相关金属氧化物材料的精确表面化学信息。

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