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| 1 | The effect of K2SiF6 on the MgH2 hydrogen storage properties显示文摘The catalytic effect of K2SiF6 on MgH2 was first timely studied.The MgH2+5 wt.%K2SiF6 was prepared via the ball milling technique.The catalyst had lessened the initial decomposition temperature by 134℃ and 48℃ as compared to both pristine and milled MgH2 samples,respectively.In 2 minutes,4.5 wt.%of hydrogen was absorbed(250℃)by the doped composite,which was 0.8 wt.%higher than the milled MgH2.Meanwhile,for the desorption kinetics(320℃,1 atm),the amount of desorbed hydrogen was increased by 2.4 wt.%and 2.3 wt.%for the first 10 and 20 minutes.Besides,contracting volume and Johnson-Mehl-Avrami models were used to analyse the kinetics sorptions.The decomposition activation energy calculated based on Kissinger equation was 114 kJ/mol.As for the active species,Mg2Si,MgF2 and KH were formed during the heating process.These active species are speculated to be responsible for the improvement of the hydrogenation properties of the composite. | M.Ismail M.S.Yahya N.A.Sazelee N.A.Ali F.A.Halim Yap N.S.Mustafa | 2020 | Journal of Magnesium and Alloys2020，8，3： | 6 |
| 2 | Improved hydrogen storage properties of MgH_2 catalyzed with K_2NiF_6显示文摘In this study, the hydrogen storage properties of MgH_2-X wt% K_2NiF_6(X = 5, 10, 15, 20, and 50) were investigated for the first time. From the analysis of the onset desorption temperature and isothermal de/absorption kinetics, it was shown that MgH_2+ 5 wt% K_2NiF_6sample has the best performance. The 5wt% doped sample started to release hydrogen at about 260 °C, which was a reduction of about 95 °C and 157 oC compared with the as-milled and as-received MgH_2. In addition, the de/absorption kinetics of the MgH_2+ 5 wt% K_2NiF_6 were also improved significantly compared to the un-doped MgH_2. The apparent activation energy for hydrogen desorption exhibited the decrement from 167.0 k J/mol for as-milled MgH_2 to 111.0 k J/mol with the addition of 5 wt% K_2NiF_6. Moreover, the X-ray diffraction spectra displayed the formation of new phases of KF, KH, Mg_2Ni and Mg_2NiH_4 by doping the K_2NiF_6with MgH_2 after the dehydrogenation and rehydrogenation processes. The scanning electron microscope results revealed that MgH_2 doped with 5 wt% K_2NiF_6demonstrated the smallest particle size compared to the as-received and as-milled MgH_2. It is believed that the formation of in situ active species of KF, KH, and Mg_2Ni could provide a synergetic catalytic effect in enhancing the hydrogen sorption properties of MgH_2. | N.N.Sulaiman N.Juahir N.S.Mustafa F.A.Halim Yap M.Ismail | 2016 | Journal of Energy Chemistry2016，25，5： | 5 |
| 3 | 腐植酸使用量对北西奈橄榄树“皮夸尔”果实质量和产量的影响显示文摘本研究于2011年,2012年间进行。选择种植在埃及北西奈省私人果园沙土上的10年生'皮夸尔'橄榄树。试验研究了4月到6月期间,每棵果树灌溉滴头下的土壤中施加不同浓度(150 cm3,75 cm3和50 cm3)的Actosal(腐植酸20%+氮磷钾1∶5∶6)的作用。在生长季末,记录产量(千克/棵)和果实质量:平均果实大小(体积)、重量、形状指标(长/直径)和果肉/核比,以及果实化学特性:果油和果酸含量。试验数据表明,在盛花期的第一周,在每棵'皮夸尔'橄榄树土壤中一次性施加150 cm3腐植酸肥Actosol后,果树产量最高(千克/棵),同时果油和果酸含量也比分两次土壤施加(盛花期和盛花期后一个月分别施加75 cm3)腐植酸高,或者分3次施加(盛花期施加50 cm3,盛花期后一个月,以及盛花期后两个月分别施加50 cm3)腐植酸高。施加Actosal后与对照组相比,大部分果实质量参数会明显下降。 | Laila F.Hagagg E.A.E.Genaidy M.F.M.Shahin N.S.Mustafa H.S.A.Hassan 李双 | 2014 | 腐植酸2014，，1： | 0 |
| 4 | 盛花期和坐果初期施用腐植酸对‘卡拉玛塔’橄榄树果实产量和质量的影响显示文摘试验于2011年和2012年两季开展,选择种植在埃及伊斯梅利亚省私人果园有10年树龄的‘卡拉玛塔’橄榄树为试验材料,调查了坐果初期叶面喷施不同浓度(0.125%、0.25%和0.5%)的腐植酸肥Actosol?(含20%腐植酸+氮磷钾1∶5∶6)对橄榄树的影响;并对橄榄树的产量和果实质量(包括平均果实体积大小、重量、长/直径、果肉/核比和湿润程度等),以及果实化学性质(果油和果酸含量)进行了记录。结果表明,在盛花期,施加一剂量的腐植酸肥Actosol?(150 cm3)于‘卡拉玛塔’橄榄树滴灌喷头下方的土壤中;在坐果初期,叶面喷施0.5%的腐植酸肥Actosol?,橄榄树产量最高且果实的理化性状最好。 | Laila F.Hagagg M.F.M.Shahin N.S.Mustafa M.A.Merwad Fikria H.Khalil 李双 | 2015 | 腐植酸2015，，1： | 0 |
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