DataVXACS Applied Energy MaterialsPaper
journal article·2023-01-09

Effect of Metaborate Additive Modification on Hydrolysis Performance of MgH2

Yongyang Zhu, Yin Wang, Liming Zeng, Daifeng Wu, Cifu Lu, Xu-Sheng Yang, Qing Zhou, Renheng Tang, Fangming Xiao

ACS Applied Energy Materials· Volume 6· Issue 1
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Source abstract

Abstract

Magnesium hydride (MgH2) is one of the most promising candidates for hydrogen generation materials due to the benign byproduct Mg(OH)2. However, the low solubility of Mg(OH)2 inevitably causes sluggish hydrolysis kinetics and low hydrogen yield. Herein, a facile strategy is reported to promote the hydrolysis performance of MgH2viain situ formation of metal borohydrides (M(BH4)x). MgH2@M(BH4)x composites are synthesized by ball milling of MgH2 and cheap metaborates. Different ball-milled durations of NaBO2 metaborate and electronegativities (χp) of cation elements of metaborates (i.e., KBO2, NaBO2, LiBO2, Ca(BO2)2, and Mg(BO2)2) were compared to reveal that the MgH2–4 mol % NaBO2 composite after 6 h ball milling has the best hydrolysis performance. Specifically, it could release 1597.2 mL g–1 H2 (95% theoretical H2) in 60 min with a fast hydrolysis rate of 1216 mL g–1 min–1 H2 during the first minute of the hydrolysis at 55 °C. Our finding is expected to facilitate the application of MgH2 for on-site hydrogen generation.
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Research context

Composites

OpenAlex topics: Hydrogen Storage and Materials · Superconductivity in MgB2 and Alloys · Magnesium Alloys: Properties and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Resources Utilization and Rare Earth Development, Key Laboratory of Separation and Comprehensive Utilization of Rare Metals, Guangdong Academy of Sciences, Guangzhou510650, People’s Republic of China

Institute of Resources Utilization and Rare Earth Development, Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Guangdong Academy of Sciences, Guangzhou510650, People’s Republic of China

School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou510641, People’s Republic of China

Department of Industrial and Systems Engineering, Research Institute for Advanced Manufacturing, The Hong Kong Polytechnic University, Hung Hom, Kowloon999077, Hong Kong, People’s Republic of China

Funding

Guangdong Science and Technology Department · Baotou Natural Science Foundation · Guangdong Academy of Sciences

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