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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >A First-Principles Study of O-2 Dissociation on Platinum Modified Titanium Carbide: A Possible Efficient Catalyst for the Oxygen Reduction Reaction
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A First-Principles Study of O-2 Dissociation on Platinum Modified Titanium Carbide: A Possible Efficient Catalyst for the Oxygen Reduction Reaction

机译:铂改性碳化钛O-2解离的第一原理研究:一种可能的氧还原反应的有效催化剂

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The adsorption and dissociation of O-2 on the Pt modified TiC(001) surfaces with different Pt coverages of 1/4, 1/2, 3/4, and 1 ML are comparatively investigated using ab initio density functional theory calculations. The geometric and electronic structures are analyzed in detail. The strong interaction of Pt atoms with the TiC(001) is beneficial to improving the stability and activity of Pt catalyst. Compared with Pt(111), the MLPt/TiC(001) (3 x 3) has a positive impact on promoting the scission of the O-O bond (leading to a dissociation barrier comparable to that on Pt(111)) and weakening the adsorption of atomic O (the dissociation product of O-2), which shed meaningful light on the important role of TiC(001) as support to improve the efficiency of Pt for oxygen reduction reaction.
机译:使用AB Initio密度功能理论计算相对调查,使用不同PT覆盖的PT修饰的TiC(001)表面上的O-2的吸附和解离。 详细分析几何和电子结构。 PT原子与TiC(001)的强相互作用是有益于改善Pt催化剂的稳定性和活性。 与Pt(111)相比,MLTP / TIC(001)(3×3)对促进OO键的裂变(导致与PT(111)上的解离屏障相当)并削弱吸附 原子o(O-2的解离产品),其对Tic(001)作为支持的重要作用,以提高Pt氧还原反应的效率。

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