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钒对采用低球磨时间制备的基于MgH的纳米复合材料吸附性能的催化作用。

The Catalytic Effect of Vanadium on Sorption Properties of MgH-Based Nanocomposites Obtained Using Low Milling Time.

作者信息

Sekulić Zorana, Novaković Jasmina Grbović, Babić Bojana, Prvulović Milica, Milanović Igor, Novaković Nikola, Rajnović Dragan, Filipović Nenad, Asanović Vanja

机构信息

Directorate for Energy and Energy Efficiency, Ministry of Capital Investments, The Government of Montenegro, Rimski trg 46, 81000 Podgorica, Montenegro.

Centre of Excellence for Renewable and Hydrogen Energy, Vinča Institute of Nuclear Sciences, National Institute of Republic of Serbia, University of Belgrade, Mike Petrovića Alasa 12-14, 11000 Belgrade, Serbia.

出版信息

Materials (Basel). 2023 Aug 5;16(15):5480. doi: 10.3390/ma16155480.

DOI:10.3390/ma16155480
PMID:37570184
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10419626/
Abstract

The effects of catalysis using vanadium as an additive (2 and 5 wt.%) in a high-energy ball mill on composite desorption properties were examined. The influence of microstructure on the dehydration temperature and hydrogen desorption kinetics was monitored. Morphological and microstructural studies of the synthesized sample were performed by X-ray diffraction (XRD), laser particle size distribution (PSD), and scanning electron microscopy (SEM) methods, while differential scanning calorimetry (DSC) determined thermal properties. To further access amorph species in the milling blend, the absorption spectra were obtained by FTIR-ATR analysis (Fourier transform infrared spectroscopy attenuated total reflection). The results show lower apparent activation energy (Eapp) and H desorption temperature are obtained for milling bland with 5 wt.% added vanadium. The best explanation of hydrogen desorption reaction shows the Avrami-Erofeev model for parameter n = 4. Since the obtained value of apparent activation energy is close to the Mg-H bond-breaking energy, one can conclude that breaking this bond would be the rate-limiting step of the process.

摘要

研究了在高能球磨机中使用钒作为添加剂（2重量%和5重量%）进行催化对复合材料解吸性能的影响。监测了微观结构对脱水温度和氢解吸动力学的影响。通过X射线衍射（XRD）、激光粒度分布（PSD）和扫描电子显微镜（SEM）方法对合成样品进行了形态和微观结构研究，同时通过差示扫描量热法（DSC）测定了热性能。为了进一步分析研磨混合物中的无定形物种，通过傅里叶变换红外光谱衰减全反射（FTIR-ATR）分析获得了吸收光谱。结果表明，添加5重量%钒的研磨混合物具有较低的表观活化能（Eapp）和氢解吸温度。对氢解吸反应的最佳解释表明，参数n = 4时符合阿弗拉米-叶罗费耶夫模型。由于获得的表观活化能值接近Mg-H键断裂能，因此可以得出结论，该键的断裂将是该过程的限速步骤。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7757/10419626/b63bcb5826bc/materials-16-05480-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7757/10419626/b63bcb5826bc/materials-16-05480-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7757/10419626/b63bcb5826bc/materials-16-05480-g009.jpg

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本文引用的文献

1
New Aspects of MgH Morphological and Structural Changes during High-Energy Ball Milling.高能球磨过程中MgH形态和结构变化的新方面
Materials (Basel). 2020 Oct 13;13(20):4550. doi: 10.3390/ma13204550.
2
Magnesium-Based Materials for Hydrogen Storage-A Scope Review.用于储氢的镁基材料——综述
Materials (Basel). 2020 Sep 9;13(18):3993. doi: 10.3390/ma13183993.
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Enhancing Hydrogen Storage Properties of MgH by Transition Metals and Carbon Materials: A Brief Review.过渡金属和碳材料对氢化镁储氢性能的增强作用：简要综述
Front Chem. 2020 Jul 2;8:552. doi: 10.3389/fchem.2020.00552. eCollection 2020.
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Chemphyschem. 2019 May 16;20(10):1216-1247. doi: 10.1002/cphc.201801125. Epub 2019 Apr 17.
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