Enhanced hydrogen desorption/absorption properties of magnesium hydride with CeF3@Gn
Enhanced hydrogen desorption/absorption properties of magnesium hydride with CeF3@Gn
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CeF3@Gn 增强氢化镁的氢解吸/吸收性能
DOI：
10.1016/j.ijhydene.2019.12.111
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发表时间：
2020-02
影响因子：
7.2
通讯作者：
Yan Mi
中科院分区：
文献类型：
--
作者：
He Ting;Wang Xinhua;Liu Haizhen;Gao Shichao;Wang Yuanyuan;Li Shouquan;Yan Mi
为了提高MgH 2的储氢性能，采用湿法球磨-煅烧的方法制备了石墨烯和CeF 3共催化的MgH 2（以下简称MgH 2 +CeF3@Gn）。研究了CeF3@Gn对MgH 2储氢性能的影响。实验结果表明，CeF3@Gn的加入显著降低了MgH 2的放氢/吸氢温度，改善了MgH 2的放氢/吸氢动力学。Mg + CeF3@Gn的开始放氢温度为232 °C，比未掺杂MgH 2的放氢温度低86 °C，放氢容量达到6.77wt%，是理论容量（6.84wt%）的99%。在300 °C和200 °C下，最大氢脱附速率比未经掺杂的球磨MgH 2快79.5和118倍。即使在150 °C的低温下，脱氢样品（Mg + CeF3@Gn）也表现出优异的吸氢动力学，在50 s内可吸5.71wt%的氢，最大吸氢速率达到15.0wt%H2/min，是未掺杂Mg的1765倍。此外，在15次氢解吸/吸收循环后，没有发生储氢容量的显著降低。Mg + CeF3@Gn催化剂表现出优异的吸放氢动力学性能，这是由于MgF 2和CeH 2 - 3原位生成，以及这些副产物的协同催化作用和Gn独特的结构。
In order to improve the hydrogen storage performance of MgH2, graphene and CeF3co-catalyzed MgH2(hereafter denoted as MgH2+CeF3@Gn) were prepared by wet method ball milling and hydriding, which is a simple and time-saving method. The effect of CeF3@Gn on the hydrogen storage behavior of MgH2was investigated. The experimental results showed that co-addition of CeF3@Gn greatly decreased the hydrogen desorption/absorption temperature of MgH2, and remarkably improved the dehydriding/hydriding kinetics of MgH2. The onset hydrogen desorption temperature of Mg + CeF3@Gn is 232 °C,which is 86 °C lower than that of as-milled undoped MgH2, and its hydrogen desorption capacity reaches 6.77 wt%, which is 99% of its theoretical capacity (6.84 wt%). At 300 °C and 200 °C the maximum hydrogen desorption rates are 79.5 and 118 times faster than that of the as-milled undoped MgH2. Even at low temperature of 150 °C, the dedydrided sample (Mg + CeF3@Gn) also showed excellent hydrogen absorption kinetics, it can absorb 5.71 wt% hydrogen within 50 s, and its maximum hydrogen absorption rate reached 15.0 wt% H2/min, which is 1765 times faster than that of the undoped Mg. Moreover, no eminent degradation of hydrogen storage capacity occurred after 15 hydrogen desorption/absorption cycles. Mg + CeF3@Gn showed excellent hydrogen de/absorption kinetics because of the MgF2and CeH2-3that are formed in situ, and the synergic catalytic effect of these by-products and unique structure of Gn.
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DOI：
10.1016/j.ijhydene.2011.02.006
发表时间：
2011-05
期刊：
Fuel and Energy Abstracts
影响因子：
--
作者：
Bin Liu;B. Zhang;Y. Jiang
通讯作者：
Bin Liu;B. Zhang;Y. Jiang
影响因子：
7.2
作者：
B. Sen;S. Kuzu;Enes Demir;Suleyman Akocak;F. Sen
通讯作者：
B. Sen;S. Kuzu;Enes Demir;Suleyman Akocak;F. Sen
影响因子：
7.2
作者：
C. Shang;Zhengxiao Guo
通讯作者：
C. Shang;Zhengxiao Guo
影响因子：
11.9
作者：
Fan, Xiulin;Xiao, Xuezhang;Wang, Qidong
通讯作者：
Wang, Qidong
影响因子：
7.2
作者：
Sen, Betul;Aygun, Aysenur;Sen, Fatih
通讯作者：
Sen, Fatih