Hydrogen storage of Mg-Zn mixed metal borohydrides

G. N. Kalantzopoulos; J. G. Vitillo; E. Albanese; E. Pinatel; B. Civalleri; S. Deledda; S. Bordiga; M. Baricco; B. C. Hauback

doi:10.1016/j.jallcom.2013.12.258

Hydrogen storage of Mg-Zn mixed metal borohydrides

G. N. Kalantzopoulos
, J. G. Vitillo
, E. Albanese
, E. Pinatel
, B. Civalleri
, S. Deledda
, S. Bordiga
, M. Baricco
, B. C. Hauback

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

On the basis of DFT results on the ideal amount of Zn required to dissolute into the α-phase of Mg(BH₄)₂ (space group P6₁22) and experimental results recently presented in the literature, mixtures of α-Mg(BH₄)₂ and ZnCl₂ have been prepared by ball-milling, reactive milling and cryo-milling in Mg:Zn starting ratios of 1:0.33, 1:0.2 and 1:0.1. Samples have been characterized with different experimental techniques (PXD, TGA, TPD with RGA and desorption kinetics in a Sieverts apparatus). All the as-milled samples exhibited a H₂ release beginning approximately at 125 °C, indicating a significant decrease in the decomposition temperature compared to pure Mg(BH₄)₂. With the exception of the Mg(BH₄)₂-0.33ZnCl₂ sample ball-milled under 1 bar Ar for 3 h that showed a small B₂H₆ release around 120 °C, all samples are free of B₂H₆ emissions. Results from desorption kinetics at 195 °C suggest a strong relation between the amount of ZnCl₂ in the starting mixture and the weight loss.

Original language	English (US)
Pages (from-to)	S702-S705
Journal	Journal of Alloys and Compounds
Volume	615
Issue number	S1
DOIs	https://doi.org/10.1016/j.jallcom.2013.12.258
State	Published - Dec 5 2014
Externally published	Yes

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© 2014 Elsevier B.V. All rights reserved.

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This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Cryo-milling
Hydrogen storage
Mixed metal borohydrides

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10.1016/j.jallcom.2013.12.258

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title = "Hydrogen storage of Mg-Zn mixed metal borohydrides",

abstract = "On the basis of DFT results on the ideal amount of Zn required to dissolute into the α-phase of Mg(BH4)2 (space group P6122) and experimental results recently presented in the literature, mixtures of α-Mg(BH4)2 and ZnCl2 have been prepared by ball-milling, reactive milling and cryo-milling in Mg:Zn starting ratios of 1:0.33, 1:0.2 and 1:0.1. Samples have been characterized with different experimental techniques (PXD, TGA, TPD with RGA and desorption kinetics in a Sieverts apparatus). All the as-milled samples exhibited a H2 release beginning approximately at 125 °C, indicating a significant decrease in the decomposition temperature compared to pure Mg(BH4)2. With the exception of the Mg(BH4)2-0.33ZnCl2 sample ball-milled under 1 bar Ar for 3 h that showed a small B2H6 release around 120 °C, all samples are free of B2H6 emissions. Results from desorption kinetics at 195 °C suggest a strong relation between the amount of ZnCl2 in the starting mixture and the weight loss.",

keywords = "Cryo-milling, Hydrogen storage, Mixed metal borohydrides",

author = "Kalantzopoulos, \{G. N.\} and Vitillo, \{J. G.\} and E. Albanese and E. Pinatel and B. Civalleri and S. Deledda and S. Bordiga and M. Baricco and Hauback, \{B. C.\}",

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doi = "10.1016/j.jallcom.2013.12.258",

language = "English (US)",

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T1 - Hydrogen storage of Mg-Zn mixed metal borohydrides

AU - Kalantzopoulos, G. N.

AU - Vitillo, J. G.

AU - Albanese, E.

AU - Pinatel, E.

AU - Civalleri, B.

AU - Deledda, S.

AU - Bordiga, S.

AU - Baricco, M.

AU - Hauback, B. C.

PY - 2014/12/5

Y1 - 2014/12/5

N2 - On the basis of DFT results on the ideal amount of Zn required to dissolute into the α-phase of Mg(BH4)2 (space group P6122) and experimental results recently presented in the literature, mixtures of α-Mg(BH4)2 and ZnCl2 have been prepared by ball-milling, reactive milling and cryo-milling in Mg:Zn starting ratios of 1:0.33, 1:0.2 and 1:0.1. Samples have been characterized with different experimental techniques (PXD, TGA, TPD with RGA and desorption kinetics in a Sieverts apparatus). All the as-milled samples exhibited a H2 release beginning approximately at 125 °C, indicating a significant decrease in the decomposition temperature compared to pure Mg(BH4)2. With the exception of the Mg(BH4)2-0.33ZnCl2 sample ball-milled under 1 bar Ar for 3 h that showed a small B2H6 release around 120 °C, all samples are free of B2H6 emissions. Results from desorption kinetics at 195 °C suggest a strong relation between the amount of ZnCl2 in the starting mixture and the weight loss.

AB - On the basis of DFT results on the ideal amount of Zn required to dissolute into the α-phase of Mg(BH4)2 (space group P6122) and experimental results recently presented in the literature, mixtures of α-Mg(BH4)2 and ZnCl2 have been prepared by ball-milling, reactive milling and cryo-milling in Mg:Zn starting ratios of 1:0.33, 1:0.2 and 1:0.1. Samples have been characterized with different experimental techniques (PXD, TGA, TPD with RGA and desorption kinetics in a Sieverts apparatus). All the as-milled samples exhibited a H2 release beginning approximately at 125 °C, indicating a significant decrease in the decomposition temperature compared to pure Mg(BH4)2. With the exception of the Mg(BH4)2-0.33ZnCl2 sample ball-milled under 1 bar Ar for 3 h that showed a small B2H6 release around 120 °C, all samples are free of B2H6 emissions. Results from desorption kinetics at 195 °C suggest a strong relation between the amount of ZnCl2 in the starting mixture and the weight loss.

KW - Cryo-milling

KW - Hydrogen storage

KW - Mixed metal borohydrides

UR - https://www.scopus.com/pages/publications/84907512972

UR - https://www.scopus.com/pages/publications/84907512972#tab=citedBy

U2 - 10.1016/j.jallcom.2013.12.258

DO - 10.1016/j.jallcom.2013.12.258

M3 - Article

AN - SCOPUS:84907512972

SN - 0925-8388

VL - 615

SP - S702-S705

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - S1

ER -

Hydrogen storage of Mg-Zn mixed metal borohydrides

Abstract

Bibliographical note

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