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首页> 外文期刊>Catalysis science & technology >Plasmon-enhanced reverse water gas shift reaction over oxide supported Au catalysts
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Plasmon-enhanced reverse water gas shift reaction over oxide supported Au catalysts

机译:等离子体增强的反向水气体转移反应在氧化物支撑的AU催化剂上

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摘要

We show that localized surface plasmon resonance (LSPR) can enhance the catalytic activities of different oxide-supported Au catalysts for the reverse water gas shift (RWGS) reaction. Oxide-supported Au catalysts showed 30 to 1300% higher activity for RWGS under visible light compared to dark conditions. Au/TiO2 catalyst prepared by the deposition-precipitation (DP) method with 3.5 nm average Au particle size showed the highest activity for the RWGS reaction. Visible light is converted into chemical energy for this reaction with up to a 5% overall efficiency. A shift in the apparent activation energy (from 47 kJ mol(-1) in dark to 35 kJ mol(-1) in light) and apparent reaction order with respect to CO2 (from 0.5 in dark to 1.0 in light) occurs due to the LSPR. Our kinetic results indicate that the LSPR increases the rate of either the hydroxyl hydrogenation or carboxyl decomposition more than any other steps in the reaction network.
机译:我们表明,局部表面等离子体共振(LSPR)可以增强不同氧化物支持的AU催化剂的催化活性,以进行反向水气(RWGS)反应。 与黑暗条件相比,在可见光下,RWGS的RWG的活性高30%至1300%。 通过沉积至沉淀(DP)方法制备的AU/TIO2催化剂,平均AU粒径为3.5 nm,对RWGS反应的活性最高。 可见光将其转化为化学能,以高达5%的总体效率,可见光。 明显的活化能(从黑暗中的47 kJ mol(-1)在光线上从35 kj mol(-1)中的偏移和相对于CO2的明显反应顺序(从黑暗中的0.5到光线为1.0),这是由于导致的 LSPR。 我们的动力学结果表明,LSPR比反应网络中的任何其他步骤都会增加羟基氢化或羧基分解的速率。

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