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Highly Dispersed MgH2 Nanoparticle–Graphene Nanosheet Composites for Hydrogen Storage
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-05-22 00:00:00 , DOI: 10.1021/acsanm.9b00694
Qiuyu Zhang 1, 2 , Yike Huang 2 , Li Xu 3 , Lei Zang 2 , Huinan Guo 2 , Lifang Jiao 2 , Huatang Yuan 2 , Yijing Wang 2
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-05-22 00:00:00 , DOI: 10.1021/acsanm.9b00694
Qiuyu Zhang 1, 2 , Yike Huang 2 , Li Xu 3 , Lei Zang 2 , Huinan Guo 2 , Lifang Jiao 2 , Huatang Yuan 2 , Yijing Wang 2
Affiliation
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We report a facile solid state method to in situ synthesize highly dispersed MgH2 nanoparticle–graphene nanosheet composites and their improved dehydrogenation/hydrogenation properties. The graphene is used as the support to in situ prepare the MgH2 nanoparticles. The MgH2 nanoparticle–10 wt % graphene nanosheet composites possess the best hydrogen storage properties among Mg-based materials. The onset dehydrogenation temperature of the MgH2 nanoparticle–10 wt % graphene nanosheet composites decreases to 255 °C. More importantly, the MgH2 nanoparticle–10 wt % graphene nanosheet composites can release 5.1 wt % hydrogen in 20 min at 325 °C. Moreover, the dehydrogenated composites could absorb 5.2 wt % hydrogen in 10 min at 250 °C under the hydrogen pressure of 2 MPa. The well-dispersed MgH2 nanoparticles (∼3 nm) and the confinement effect of graphene result in the improved hydrogen storage properties. The novel solid state method of in situ synthesizing MgH2 nanoparticles provides a new horizon for designing high performance Mg-based materials.
中文翻译：
用于储氢的高度分散的MgH 2纳米颗粒-石墨烯纳米片复合材料
我们报告了一种简便的固态方法，用于原位合成高度分散的MgH 2纳米颗粒-石墨烯纳米片复合材料及其改善的脱氢/氢化性能。石墨烯用作载体以原位制备MgH 2纳米颗粒。MgH 2纳米粒子–10 wt％的石墨烯纳米片复合材料在基于Mg的材料中拥有最佳的储氢性能。MgH 2纳米粒子–10 wt％的石墨烯纳米片复合材料的起始脱氢温度降至255°C。更重要的是，MgH 2纳米粒子– 10 wt％的石墨烯纳米片复合材料可在325°C下在20分钟内释放5.1 wt％的氢。此外，脱氢的复合材料在250℃，2 MPa的氢气压力下，在10分钟内可吸收5.2 wt％的氢气。分散良好的MgH 2纳米颗粒（〜3 nm）和石墨烯的限制作用导致改善的储氢性能。原位合成MgH 2纳米颗粒的新型固态方法为设计高性能的Mg基材料提供了新的视野。
更新日期：2019-05-22
中文翻译：
用于储氢的高度分散的MgH 2纳米颗粒-石墨烯纳米片复合材料
我们报告了一种简便的固态方法，用于原位合成高度分散的MgH 2纳米颗粒-石墨烯纳米片复合材料及其改善的脱氢/氢化性能。石墨烯用作载体以原位制备MgH 2纳米颗粒。MgH 2纳米粒子–10 wt％的石墨烯纳米片复合材料在基于Mg的材料中拥有最佳的储氢性能。MgH 2纳米粒子–10 wt％的石墨烯纳米片复合材料的起始脱氢温度降至255°C。更重要的是，MgH 2纳米粒子– 10 wt％的石墨烯纳米片复合材料可在325°C下在20分钟内释放5.1 wt％的氢。此外，脱氢的复合材料在250℃，2 MPa的氢气压力下，在10分钟内可吸收5.2 wt％的氢气。分散良好的MgH 2纳米颗粒（〜3 nm）和石墨烯的限制作用导致改善的储氢性能。原位合成MgH 2纳米颗粒的新型固态方法为设计高性能的Mg基材料提供了新的视野。
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