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Enhanced hydrogen generation performance of CaMg2-based materials by ball milling
Ma,Miaolian1,2; Chen,Kang2; Jiang,Jun2; Yang,Xusheng3; Wang,Hui2; Shao,Huaiyu4; Liu,Jiangwen2; Ouyang,Liuzhang2,5
Source PublicationInorganic Chemistry Frontiers

Non-catalytic hydrolysis of CaMg-based materials (abbreviated as CaMg, CaMg-0.1Ni, H-CaMg, and H-CaMg-0.1Ni hereinafter) fabricated by ball milling for hydrogen supply has been investigated in the present work. With respect to the as-melted counterparts, it is found that both milled CaMg and H-CaMg-based samples can significantly enhance the hydrolysis performance via adjusting the milling durations. In particular, 0.5 h-milled CaMg and 3 h-milled H-CaMg exert optimal kinetics at ambient temperature, delivering a hydrogen yield of 539 mL g within 2 h and 1439 mL g of H within only 3 min, respectively. In addition, the further results indicate that the hydrogen uptake of CaMg can be accelerated by doping with the Ni element, giving rise to considerably enhanced hydrolytic dynamics, as opposed to a limited promotion of the hydrolysis of the CaMg alloy. For example, the hydrogen yield of H-CaMg-0.1Ni increases from 853 to 1147 mL g H in 5 min with hydrogenation durations ranging from 0.5 to 1.5 h, much higher than the values (598-954 mL g H) of H-CaMg under the same conditions. More specifically, the 3 h-milled H-CaMg sample also demonstrates excellent cryogenic hydrolysis kinetics, achieving a hydrogen yield of 1332 mL g H within 15 min at 0 °C. In comparison with the conventional hydrogenation of pristine CaMg conducted at elevated temperature, a more feasible strategy is applied to realize its hydrogen uptake by ball milling with Ni under mild conditions. Expectedly, the hydrogen supply capacities of the hydrogenated samples are markedly enhanced, making them promising to achieve their wide applications in hydrogen energy areas in the future.

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Indexed BySCIE
WOS Research AreaChemistry
WOS SubjectChemistry, Inorganic & Nuclear
WOS IDWOS:000515601600008
Scopus ID2-s2.0-85080050046
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Cited Times [WOS]:8   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Corresponding AuthorYang,Xusheng; Shao,Huaiyu; Ouyang,Liuzhang
Affiliation1.Hefei University of Technology
2.South China University of Technology
3.Hong Kong Polytechnic University
4.University of Macau
5.China-Australia Joint Laboratory for Energy and Environmental Materials,Key Laboratory of Fuel Cell Technology of Guangdong Province
Corresponding Author AffilicationUniversity of Macau
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GB/T 7714
Ma,Miaolian,Chen,Kang,Jiang,Jun,et al. Enhanced hydrogen generation performance of CaMg2-based materials by ball milling[J]. Inorganic Chemistry Frontiers,2020,7(4):918-929.
APA Ma,Miaolian,Chen,Kang,Jiang,Jun,Yang,Xusheng,Wang,Hui,Shao,Huaiyu,Liu,Jiangwen,&Ouyang,Liuzhang.(2020).Enhanced hydrogen generation performance of CaMg2-based materials by ball milling.Inorganic Chemistry Frontiers,7(4),918-929.
MLA Ma,Miaolian,et al."Enhanced hydrogen generation performance of CaMg2-based materials by ball milling".Inorganic Chemistry Frontiers 7.4(2020):918-929.
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