Towards easy reversible dehydrogenation of LiBH 4 by catalyzing hierarchic nanostructured CoB

Cai, Weitong; Wang, Hui; Liu, Jiangwen; Jiao, Lifang; Wang, Yijing; Ouyang, Liuzhang; Sun, Tai; Sun, Dalin; Wang, Haihui; Yao, Xiangdong; Zhu, Min

doi:10.1016/j.nanoen.2014.09.001

Cited by 54 publications

(35 citation statements)

References 44 publications

(105 reference statements)

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“…Therefore, only the 1:1 ratio sample is investigated here. Figure 1a depicts the hydrogen desorption profile up to 500 • C. The LiBH 4 -Co 1.34 B composite shows two hydrogen desorption events at 200 and 375 • C, respectively, which are in agreement with previously reported results [15]. The major hydrogen desorption occurs around 375 • C. Figure 1b shows the isothermal dehydrogenation at 350 • C in the first two cycles.…”

Section: Resultssupporting

confidence: 88%

“…In the past, different Co x B:LiBH 4 ratios were investigated. The 1:1 ratio showed the optimal hydrogen sorption performance [15]. The present study is to further investigate the hydrogen sorption mechanism of the Co x B:LiBH 4 composite.…”

Section: Resultsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

“…Waxberry-like nanostructured cobalt boride was synthesized based on a wet-chemistry method described in literature [15,30,31]. The nanostructured cobalt boride shows a specific surface area of 39.7 m 2 /g and approximate average composition of Co 1.34 B [15]. The as-synthesized Co 1.34 B and LiBH 4 were mechanically milled in a weight ratio of 1:1 using vibration milling (QM-3C, Nanjing Nanda Instrument Plant, Nanjing, China) for 1 h with a ball to powder ratio of 120:1 under Ar atmosphere.…”

Section: Methodsmentioning

confidence: 99%

“…Owing to high gravimetric and volumetric densities of hydrogen, metal borohydrides have been intensively investigated for solid-state hydrogen storage over the last decade [1][2][3][4][5][6]. Among them, lithium borohydride (LiBH 4 ), exhibiting a hydrogen density of 18.5 wt %, is one of the currently most discussed lightweight complex hydrides [7][8][9][10][11][12][13][14][15][16][17][18]. It crystalizes in two polymorphs, with structural transition from an orthorhombic low-temperature phase to a hexagonal high-temperature (HT) phase above 110 • C [7].…”

Section: Introductionmentioning

confidence: 99%

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Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

et al. 2018

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Li 2 B 12 H 12 is commonly considered as a boron sink hindering the reversible hydrogen sorption of LiBH 4 . Recently, in the dehydrogenation process of LiBH 4 an amorphous H-deficient Li 2 B 12 H 12−x phase was observed. In the present study, we investigate the rehydrogenation properties of Li 2 B 12 H 12−x to form LiBH 4 . With addition of nanostructured cobalt boride in a 1:1 mass ratio, the rehydrogenation properties of Li 2 B 12 H 12−x are improved, where LiBH 4 forms under milder conditions (e.g., 400 • C, 100 bar H 2 ) with a yield of 68%. The active catalytic species in the reversible sorption reaction is suggested to be nonmetallic Co x B (x = 1) based on 11 B MAS NMR experiments and its role has been discussed.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

et al. 2018

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Composition‐Dependent Reaction Pathways and Hydrogen Storage Properties of LiBH₄/Mg(AlH₄)₂ Composites

Pang

Liu

Zhang

et al. 2015

Chemistry An Asian Journal

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Herein, an initial attempt to understand the relationships between hydrogen storage properties, reaction pathways, and material compositions in LiBH4-x Mg(AlH4)2 composites is demonstrated. The hydrogen storage properties and the reaction pathways for hydrogen release from LiBH4-x Mg(AlH4)2 composites with x=1/6, 1/4, and 1/2 were systematically investigated. All of the composites exhibit a four-step dehydrogenation event upon heating, but the pathways for hydrogen desorption/absorption are varied with decreasing LiBH4/Mg(AlH4)2 molar ratios. Thermodynamic and kinetic investigations reveal that different x values lead to different enthalpy changes for the third and fourth dehydrogenation steps and varied apparent activation energies for the first, second, and third dehydrogenation steps. Thermodynamic and kinetic destabilization caused by the presence of Mg(AlH4)2 is likely to be responsible for the different hydrogen desorption/absorption performances of the LiBH4-x Mg(AlH4)2 composites.

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Improved Dehydrogenation Properties of LiBH₄ Using Catalytic Nickel‐ and Cobalt‐based Mesoporous Oxide Nanorods

Zang

Zhang

et al. 2017

Chemistry An Asian Journal

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Lithiumb orohydride( LiBH 4 )w ith at heoretical hydrogen storagec apacity of 18.5 wt %h as attracted intense interest as ahigh-density hydrogen storagematerial. However,h igh dehydrogenation temperatures and limited kinetics restrict its practical applications. In this study,m esoporous nickel-and cobalt-based oxide nanorods (NiCo 2 O 4 ,C o 3 O 4 and NiO) were synthesized in ac ontrolled mannerb yu sing ah ydrothermalm ethod and then mixed with LiBH 4 by ball milling. It is found that the dehydrogenationp roperties of LiBH 4 are remarkably enhanced by doping the as-synthesized metal oxide nanorods. When the mass ratio of LiBH 4 and oxidesi s1:1, the NiCo 2 O 4 nanorods display the best catalytic performance owing to the mesoporousr od-like structure and synergistic effect of nickel and cobalt active species. The initial hydrogen desorption temperature of the LiBH 4 -NiCo 2 O 4 composite decreases to 80 8C, which is 220 8C lower than that of pure LiBH 4 ,a nd 16.1 wt %H 2 is released at 500 8Cf or the LiBH 4 -NiCo 2 O 4 composite. Meanwhile, the composite also exhibits superior dehydrogenation kinetics, which liberates 5.7 wt %H 2 within 60 sa nd at otal of 12 wt %H 2 after 5h at 400 8C. In comparison, pure LiBH 4 releases only 5.3 wt %H 2 under the same conditions.

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Towards easy reversible dehydrogenation of LiBH 4 by catalyzing hierarchic nanostructured CoB

Cited by 54 publications

References 44 publications

Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

Composition‐Dependent Reaction Pathways and Hydrogen Storage Properties of LiBH₄/Mg(AlH₄)₂ Composites

Improved Dehydrogenation Properties of LiBH₄ Using Catalytic Nickel‐ and Cobalt‐based Mesoporous Oxide Nanorods

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Towards easy reversible dehydrogenation of LiBH 4 by catalyzing hierarchic nanostructured CoB

Cited by 54 publications

References 44 publications

Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

Direct Rehydrogenation of LiBH4 from H-Deficient Li2B12H12−x

Composition‐Dependent Reaction Pathways and Hydrogen Storage Properties of LiBH4/Mg(AlH4)2 Composites

Improved Dehydrogenation Properties of LiBH4 Using Catalytic Nickel‐ and Cobalt‐based Mesoporous Oxide Nanorods

Contact Info

Product

Resources

About

Composition‐Dependent Reaction Pathways and Hydrogen Storage Properties of LiBH₄/Mg(AlH₄)₂ Composites

Improved Dehydrogenation Properties of LiBH₄ Using Catalytic Nickel‐ and Cobalt‐based Mesoporous Oxide Nanorods