| Improvement on hydrogen generation properties of Zr(BH_4)_4·8NH_3 |
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| 摘 要： | Hydrolysis of Zr(BH_4)_4·8NH_3 in deionized water can generate high purity hydrogen at room temperature.However, the sluggish hydrolysis kinetics of Zr(BH_4)_4·8NH_3 hinders its practical use. To improve its hydrogen generation properties, the effects of magnetic stirring, changing hydrolysis solution and tuning the ammonia coordination number on the hydrolysis properties of Zr(BH_4)_4·8NH_3 were investigated. Results show that both changing hydrolysis solution and tuning the ammonia coordination number can enhance the hydrolysis kinetics.The hydrolysis kinetics properties of Zr(BH_4)_4·8NH_3 were significantly improved in MgCl_2 and CoCl_2 solutions.The Zr(BH_4)_4·8NH_3(x ≤ 8) samples were synthesized by a ball-milling method with different ammonization time(10, 60 and 180 min). Both the hydrolysis kinetics and hydrogen yield of Zr(BH_4)_4·8NH_3(x ≤ 8) were enhanced as the ammonia coordination number(x) decreased. Thus, tuning ammonia coordination number is an effective way to control the hydrolysis properties of Zr(BH_4)_4·8NH_3(x ≤ 8).
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| 收稿时间： | 7 April 2020 |
Improvement on hydrogen generation properties of Zr(BH4)4·8NH3 |
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| Authors: | DF Wu LZ Ouyang JM Huang JW Liu H Wang XS Yang H Shao M Zhu |
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| Abstract: | Hydrolysis of Zr(BH4)4·8NH3 in deionized water can generate high purity hydrogen at room temperature. However, the sluggish hydrolysis kinetics of Zr(BH4)4·8NH3 hinders its practical use. To improve its hydrogen generation properties, the effects of magnetic stirring, changing hydrolysis solution and tuning the ammonia coordination number on the hydrolysis properties of Zr(BH4)4·8NH3 were investigated. Results show that both changing hydrolysis solution and tuning the ammonia coordination number can enhance the hydrolysis kinetics. The hydrolysis kinetics properties of Zr(BH4)4·8NH3 were significantly improved in MgCl2 and CoCl2 solutions. The Zr(BH4)4·xNH3 (x ≤ 8) samples were synthesized by a ball-milling method with different ammonization time (10, 60 and 180 min). Both the hydrolysis kinetics and hydrogen yield of Zr(BH4)4·xNH3 (x ≤ 8) were enhanced as the ammonia coordination number (x) decreased. Thus, tuning ammonia coordination number is an effective way to control the hydrolysis properties of Zr(BH4)4·xNH3 (x ≤ 8). |
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| Keywords: | Hydrogen production Hydrolysis properties Ammonia coordination number |
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