用基复合催化剂Ni/NiOO对MgH2储性能进行修改
Wenxuan Li1, Xinglin Yang1, Quanhui Hou2
1School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.
Heliyon
|May 17, 2024
概括
/催化剂显著改善化 (MgH) 的储存. 这种增强材料在中等温度下显示出快速释放和吸收的情况,这使得它对储存应用具有前景.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 纳米技术纳米技术
背景情况:
- 化 (MgH2) 由于其高容量,是储存的有希望的材料.
- 然而,MgH2有较差的动力学和高的脱温度,这限制了其实际应用.
- 催化剂对于提高MgH的储性能至关重要.
研究的目的:
- 研究Ni/NiO催化剂对MgH2的储特性的影响.
- 评估用Ni/NiO增强的MgH2的脱和再化动力学和热力学.
- 了解催化剂在储循环中的作用.
主要方法:
- 用10%重量的Ni/NiO催化剂合成MgH2.
- 热重力测量分析 (TGA) 用于研究脱和再的行为.
- 差分扫描热度计 (DSC) 用于确定激活能量.
- 循环测试以评估长期稳定性.
主要成果:
- MgH2+10重%Ni/NiO复合物表现出从~180°C开始的增强脱,在10分钟内300°C释放5.83重%.
- 再化在50°C左右开始,材料在150°C的10分钟内吸收了约4.56%的.
- 脱和再的激活能被确定为分别为87.21kJ/mol和34.84kJ/mol.
- 在循环过程中形成的Mg2Ni/Mg2NiH4促进了扩散.
结论:
- /催化剂显著提高了MgH的存性能.
- 催化剂降低了脱温度,并改善了吸收/脱动力学.
- Mg2Ni/Mg2NiH4中间阶段在循环过程中促进扩散起着至关重要的作用,这表明实际存应用的潜力.
关键词:
气储存的性能 气储存的性能MgH2MgH2MgH2MgH2MgH2MgH2MgH2MgH2MgH2MgH2MgH2MgH2MgH2MgH2Mg修改 修改 修改 是一个尼 / 尼奥 / NiOO更多相关视频
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