Hydrogen desorption behavior of vanadium borohydride synthesized by modified mechano-chemical process

Cheng Hsien Yang; Wen Ta Tsai; Jeng-Kuei Chang

doi:10.1016/j.ijhydene.2011.01.041

Hydrogen desorption behavior of vanadium borohydride synthesized by modified mechano-chemical process

Cheng Hsien Yang, Wen Ta Tsai^*, Jeng-Kuei Chang

^*Corresponding author for this work

Department of Materials Science and Engineering

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

10 Scopus citations

Abstract

The vanadium borohydride was synthesized by a mechano-chemical milling method and its hydrogen desorption performance was evaluated. The effect of cooling during milling process on the hydrogen desorption behavior was also investigated. Nearly pure hydrogen was detected using a mass spectrometer coupled with a simultaneous thermal analyzer. Thermogravimetric method was conducted to determine the initial desorption temperature and the amount of hydrogen released from the hydride. The initial desorption temperature of vanadium borohydride was found below 100 °C, with an enthalpy change of 25.4 kJ/mol V(BH₄)₃. The amount of hydrogen released from the hydride prepared by milling but without cooling was 0.25 wt%, while that prepared with controlled cooling at 20 °C was 1 wt%. A beneficial effect of enhanced hydrogen release to 2.2 wt% from borohydride was found if multi-walled carbon nanotubes (MWCNTs) were added as an additive.

Original language	English
Pages (from-to)	4993-4999
Number of pages	7
Journal	International Journal of Hydrogen Energy
Volume	36
Issue number	8
DOIs	https://doi.org/10.1016/j.ijhydene.2011.01.041
State	Published - 1 Apr 2011

Keywords

Mechano-chemical milling method
Multi-walled carbon nanotube
Vanadium borohydride

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

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10.1016/j.ijhydene.2011.01.041

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title = "Hydrogen desorption behavior of vanadium borohydride synthesized by modified mechano-chemical process",

abstract = "The vanadium borohydride was synthesized by a mechano-chemical milling method and its hydrogen desorption performance was evaluated. The effect of cooling during milling process on the hydrogen desorption behavior was also investigated. Nearly pure hydrogen was detected using a mass spectrometer coupled with a simultaneous thermal analyzer. Thermogravimetric method was conducted to determine the initial desorption temperature and the amount of hydrogen released from the hydride. The initial desorption temperature of vanadium borohydride was found below 100 °C, with an enthalpy change of 25.4 kJ/mol V(BH4)3. The amount of hydrogen released from the hydride prepared by milling but without cooling was 0.25 wt%, while that prepared with controlled cooling at 20 °C was 1 wt%. A beneficial effect of enhanced hydrogen release to 2.2 wt% from borohydride was found if multi-walled carbon nanotubes (MWCNTs) were added as an additive.",

keywords = "Mechano-chemical milling method, Multi-walled carbon nanotube, Vanadium borohydride",

author = "Yang, {Cheng Hsien} and Tsai, {Wen Ta} and Jeng-Kuei Chang",

year = "2011",

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doi = "10.1016/j.ijhydene.2011.01.041",

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AU - Yang, Cheng Hsien

AU - Tsai, Wen Ta

AU - Chang, Jeng-Kuei

PY - 2011/4/1

Y1 - 2011/4/1

N2 - The vanadium borohydride was synthesized by a mechano-chemical milling method and its hydrogen desorption performance was evaluated. The effect of cooling during milling process on the hydrogen desorption behavior was also investigated. Nearly pure hydrogen was detected using a mass spectrometer coupled with a simultaneous thermal analyzer. Thermogravimetric method was conducted to determine the initial desorption temperature and the amount of hydrogen released from the hydride. The initial desorption temperature of vanadium borohydride was found below 100 °C, with an enthalpy change of 25.4 kJ/mol V(BH4)3. The amount of hydrogen released from the hydride prepared by milling but without cooling was 0.25 wt%, while that prepared with controlled cooling at 20 °C was 1 wt%. A beneficial effect of enhanced hydrogen release to 2.2 wt% from borohydride was found if multi-walled carbon nanotubes (MWCNTs) were added as an additive.

AB - The vanadium borohydride was synthesized by a mechano-chemical milling method and its hydrogen desorption performance was evaluated. The effect of cooling during milling process on the hydrogen desorption behavior was also investigated. Nearly pure hydrogen was detected using a mass spectrometer coupled with a simultaneous thermal analyzer. Thermogravimetric method was conducted to determine the initial desorption temperature and the amount of hydrogen released from the hydride. The initial desorption temperature of vanadium borohydride was found below 100 °C, with an enthalpy change of 25.4 kJ/mol V(BH4)3. The amount of hydrogen released from the hydride prepared by milling but without cooling was 0.25 wt%, while that prepared with controlled cooling at 20 °C was 1 wt%. A beneficial effect of enhanced hydrogen release to 2.2 wt% from borohydride was found if multi-walled carbon nanotubes (MWCNTs) were added as an additive.

KW - Mechano-chemical milling method

KW - Multi-walled carbon nanotube

KW - Vanadium borohydride

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 8

ER -

Hydrogen desorption behavior of vanadium borohydride synthesized by modified mechano-chemical process

Abstract

Keywords

UN SDGs

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