Catalytic effect of Ni nanoparticles on the desorption kinetics of MgH2 nanoparticles

Xie, Lei; Liu, Yang; Zhang, Xuanzhou; Qu, Jianglan; Wang, Yuntao; Li, Xingguo

doi:10.1016/j.jallcom.2009.04.028

Cited by 91 publications

(41 citation statements)

References 36 publications

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“…Akan tetapi Mg memiliki kelemahan yakni reaksi kinetiknya yang lambat, demikian juga temperatur operasinya relatif tinggi (~300 °C). Banyak upaya telah dilakukan untuk meningkatkan sifat penyerapan dan kinetika reaksi seperti substitusi unsur (logam atau oksida logam) sebagai katalis [5][6] , mereduksi ukuran butir material hingga skala nanokristal dengan teknik mechanical alloying [7] serta membentuk material komposit [8] .…”

Section: Pendahuluanunclassified

“…Pada Gambar 2 terlihat bahwa temperatur puncak desorpsi material MgH2 murni berada pada temperatur 409 °C. Hasil ini sesuai dengan penelitian sebelumnya yang dilakukan Xie [6] yang menunjukkan bahwa temperatur operasi MgH2 yang masih tinggi dengan kisaran 400 °C. Kemudian upaya untuk menurunkan temperatur dilakukan dengan menambahkan katalis Ni dengan proses milling selama 10 jam.…”

Section: Hasil Dan Pembahasanunclassified

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Studi Katalis Ni Nano pada Material Penyimpan Hidrogen MgH2 yang Dipreparasi melalui Teknik Mechanical Alloying

Sari¹,

Rahwanto²,

Jalil³

2016

Indonesian J Appl Phys

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The main obstacle which hinders the application of fuel cell fuels in motor vehicles today is the hydrogen storage tubes. One of the latest efforts in hydrogen storage research is to insert hydrogen in certain metals or called solid state hydrogen storage. Magnesium (Mg) is regarded as one of the material potential candidates absorbing hydrogen, because theoretically, it has the ability to absorb hydrogen in the large quantities of (7.6 wt%). This amount exceeds the minimum limit which is targeted Badan Energi Dunia (IEA), that is equal 5 wt%. However Mg has shortage, namely its kinetic reaction is very slow, it takes time to absorb hydrogen at least 60 minutes with very high operating temperatures (300-400 °C). The aim of this study is to improve the hydrogen desorption temperature hydrogen storage material based MgH2. In this method, milling of material is done in the time of 10 h with the variation of catalyst inserts a for 6wt%, 10wt% and 12 wt%. The results from XRD measurements in mind that the sample was reduced to scale nanocrystal. Phase that appears of the observation of result XRD is MgH2 phase as the main phase, and followed by Ni phase as minor phase. The result of observations with DSC, to the lowest temperature obtained on the sample with a weight of catalyst 12 wt% Ni catalyst that is equal to 376 °C. These results successfully repair pure temperature of Mgbased hydrides.Keywords: Material penyimpan hidrogen, mechanical alloying, temperatur desorpsi, magnesium ABSTRAK Kendala utama yang menghambat aplikasi bahan bakar fuel cell pada kendaraan bermotor saat ini adalah tabung penyimpan hidrogen. Salah satu upaya mutakhir dalam riset penyimpan hidrogen adalah dengan menyisipkan hidrogen dalam logam tertentu atau disebut solid state hydrogen storage. Magnesium (Mg) dianggap sebagai salah satu kandidat potensial material penyerap hidrogen, karena secara teoritis, memiliki kemampuan menyerap hidrogen dalam jumlah besar (7,6 wt%). Jumlah ini melebihi batas minimum yang ditargetkan Badan Energi Dunia (IEA) yakni sebesar 5 wt%. Akan tetapi Mg memiliki kekurangan, yakni reaksi kinetiknya sangat lambat, untuk menyerap hidrogen dibutuhkan waktu minimal 60 menit dengan temperatur operasi yang sangat tinggi (300 -400 °C). Tujuan dari studi ini adalah untuk memperbaiki temperatur desorpsi hidrogen material penyimpan hidrogen berbasis MgH2. Pada metode ini, penghalusan (milling) material dilakukan dalam waktu 10 jam dengan varisi sisipan katalis sebesar 6wt%, 10wt% dan 12 wt%Ni. Hasil dari pengukuran XRD diketahui bahwa sampel berhasil direduksi hingga skala nanokristal. Fasa yang muncul dari hasil observasi XRD adalah fasa MgH2 sebagai fasa utama, dan diikuti fasa Ni sebagai fasa minor. Hasil observasi dengan DSC, temperatur terendah diperoleh pada sampel dengan berat katalis 12 wt%Ni, yaitu sebesar 376 °C. Hasil ini menunjukkan bahwa penambahan katalis Ni skala nano ke dalam material MgH2 berhasil memperbaiki temperatur desorpsi Mg murni.Kata kunci: Solid storage hydrogen, mechanical alloying, desorpti...

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Section: Pendahuluanunclassified

Section: Hasil Dan Pembahasanunclassified

Studi Katalis Ni Nano pada Material Penyimpan Hidrogen MgH2 yang Dipreparasi melalui Teknik Mechanical Alloying

Sari¹,

Rahwanto²,

Jalil³

2016

Indonesian J Appl Phys

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“…Hydrogen storage by solid state materials is considered as a promising way, which can be used in nickel-metal hydride secondary batteries and fuel cell vehicles [2][3][4][5][6][7][8][9][10][11]. Mg and Mg-based materials are regarded as promising candidates for vehicular hydrogen storage owning to their high hydrogen storage capacities, low price, abundant resources and friendly to environment [12][13][14][15]. Unfortunately, Mg has a high thermodynamic stability (the enthalpy of hydride formation for Mg is −74 kJ/mol) [16] and a lower plateau pressure at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen storage properties of Mg–Ni–Fe composites prepared by hydriding combustion synthesis and mechanical milling

Zhu

Yang

Wei

et al. 2012

Journal of Alloys and Compounds

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“…However, these kinds of the hydrides suffer from high thermodynamic stability, resulting in sluggish hydriding/dehydriding kinetics. Therefore, a variety of attempts, mechanical alloying (MA) [2], GPa hydrogen pressure method [3], melt spinning [4,5], gravity casting [6], hydriding combustion synthesis [7], surface modification [8], alloying with other elements [9], adding catalysts [10], spark plasma sintering [11], etc., have been developed to enhance their hydriding/dehydriding kinetics and to reduce their thermodynamic stability.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electrochemical characteristics of as-spun nanocrystalline and amorphous Mg2Ni-type alloy electrodes

Zhang

Guo

et al. 2010

Journal of Alloys and Compounds

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Catalytic effect of Ni nanoparticles on the desorption kinetics of MgH2 nanoparticles

Cited by 91 publications

References 36 publications

Studi Katalis Ni Nano pada Material Penyimpan Hidrogen MgH2 yang Dipreparasi melalui Teknik Mechanical Alloying

Studi Katalis Ni Nano pada Material Penyimpan Hidrogen MgH2 yang Dipreparasi melalui Teknik Mechanical Alloying

Hydrogen storage properties of Mg–Ni–Fe composites prepared by hydriding combustion synthesis and mechanical milling

Enhanced electrochemical characteristics of as-spun nanocrystalline and amorphous Mg2Ni-type alloy electrodes

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