铂和金纳米颗粒一氧化碳氧化催化剂的比较活性

J. Emmanuel
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引用次数: 0

摘要

研究了铂和金纳米催化剂在二氧化钛载体上的一氧化碳氧化活性。采用高通量物理气相沉积法(HT-PVD)合成了铂和金催化剂。采用平行热成像筛选方法对CO氧化反应中铂和金催化剂的活性进行了定量分析。Pt和Au的催化活性存在粒径效应,最小的颗粒表现出最高的催化活性。Pt和Au催化剂的活性随温度升高而升高。Au催化剂在80℃时表现出较高的活性,Pt催化剂在170℃时表现出较高的活性。虽然CO在Pt和Au催化剂上的氧化与颗粒大小有关,但结果表明,与Pt催化剂相比,Au纳米催化剂表现出最强的颗粒大小依赖性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative activity of Platinum and Gold nanoparticles catalysts for Carbon monoxide oxidation
The activity of Pt and Au nanoparticles catalysts over titania support for carbon monoxide oxidation was investigated. Pt and Au catalysts were synthesised by a high-throughput physical vapour deposition methodology (HT-PVD). A parallel thermographic screening methodology, which enabled the quantification of the activity of Pt and Au catalysts for CO oxidation reaction, was applied. A particle size effect in the catalytic activity of Pt and Au was observed, with the smallest particles exhibiting the highest activity. The activity of Pt and Au catalysts increased with temperature. Au catalyst displayed high activity at 80 ℃, while Pt catalyst had higher activity at 170 ℃. Although CO oxidation on Pt and Au catalysts is particle size-dependent, results show that Au nanoparticles catalyst exhibits the strongest particles size dependence as compared to Pt catalyst.
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