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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Effects of Pt Particle Size on Hydrogen Storage on Pt-Doped Metal—Organic Framework IRMOF-8
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Effects of Pt Particle Size on Hydrogen Storage on Pt-Doped Metal—Organic Framework IRMOF-8

机译：Pt颗粒尺寸对掺杂Pt的金属有机骨架IRMOF-8氢存储的影响

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A series of Pt-doped IRMOF-8 samples with different Pt catalyst sizes have been prepared via organometallic chemical-vapor deposition (CVD). The Pt catalyst size effects on the spillover storage on IRMOF-8 (or any MOF) were studied for the first time. Our studies showed that the Pt catalyst size is a crucial factor determining whether a significant enhancement in storage can be achieved in the hydrogen spillover system at ambient temperature. Compared to undoped IRMOF-8, the spillover storage capacities on Pt-doped IRMOF-8 samples were enhanced by factors ranging from 1.1 to 1.9 because of different Pt catalyst sizes. The doped Pt size was controlled by varying the CVD conditions to yield mean sizes of 2.2, 3.9, and 9.1 nm, and the results showed that smaller sizes were needed for spillover. Temperature-programmed desorption of dosed H2/D2 further shed light on the mechanism of spillover and reverse spillover, confirming undercoordinated sites on the particle-enhanced spillover.
机译：通过有机金属化学气相沉积（CVD）制备了一系列具有不同Pt催化剂尺寸的Pt掺杂IRMOF-8样品。首次研究了Pt催化剂尺寸对IRMOF-8（或任何MOF）上的溢出存储的影响。我们的研究表明，Pt催化剂的尺寸是决定在环境温度下氢溢流系统中能否实现显着提高存储量的关键因素。与未掺杂的IRMOF-8相比，由于Pt催化剂尺寸不同，Pt掺杂的IRMOF-8样品的溢出存储容量提高了1.1到1.9。通过改变CVD条件来控制掺杂的Pt尺寸，以产生2.2、3.9和9.1 nm的平均尺寸，结果表明，需要较小的尺寸进行溢出。程序控制的剂量H2 / D2的脱附温度进一步阐明了溢出和反向溢出的机理，从而证实了颗粒增强溢出的不协调位置。

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