采用高能球磨制备了不同摩尔量KF掺杂的MgH2-2LiNH2-xKF(x=0,0.015,0.025,0.050,0.100)储氢材料,采用XRD,DSC-MS和Sieverts方法研究了材料物相与储氢性能.结果表明,KF的掺杂促进了球磨过程中MgH2-2LiNH2向Mg(NH2)2-2LiH的转变,KF掺杂的样品放氢后出现KH的衍射峰.KF的掺杂显著提高了MgH2-2LiNH2材料放氢动力学性能,降低了放氢反应起始温度和激活能,且放氢过程有效抑制了NH3的释放,其中0.05 mol KF掺杂MgH2-2LiNH2体系放氢性能最优.
参考文献
| [1] | H.Y. Leng;T. Ichikawa;S. Isobe .Desorption behaviours from metal-N-H systems synthesized by ball milling[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2005(0):443-447. |
| [2] | Jianhui Wang;Tao Liu;Guotao Wu .Potassium-Modified Mg(NH2)2/2 LiH System for Hydrogen Storage[J].Angewandte Chemie,2009(32):5828-5832. |
| [3] | Weifang Luo;Vitalie Stauila;Leonard E. Klebanoff .New insights into the mechanism of activation and hydrogen absorption of (2LiNH_2-MgH_2)[J].International journal of hydrogen energy,2012(8):6646-6652. |
| [4] | Tolulope Durojaiye;Andrew Goudy .Desorption kinetics of lithium amide/magnesium hydride systems at constant pressure thermodynamic driving forces[J].International journal of hydrogen energy,2012(4):3298-3304. |
| [5] | Junqing Zhang;Yun Hang Hu .Decomposition of Lithium Amide and Lithium Imide with and without Anion Promoter[J].Industrial & Engineering Chemistry Research,2011(13):8058-8064. |
| [6] | Huaqin Kou;Xuezhang Xiao;Jinxiu Li;Shouquan Li;Hongwei Ge;Qidong Wang;Lixin Chen .Effects of fluoride additives on dehydrogenation behaviors of 2LiBH_4 + MgH_2 system[J].International journal of hydrogen energy,2012(1):1021-1026. |
| [7] | 吉亚莉,刘晓鹏,吕芳,米菁,蒋利军,王树茂.载钯硅藻土复合材料吸/放氢循环性能和抗粉化性能研究[J].稀有金属,2011(02):238-243. |
| [8] | 廖骞,张静,丁德军,张立华,尹泓卜.新型轻质储氢材料-金属铝氢化物的研究进展[J].稀有金属,2012(03):483-490. |
| [9] | Xiang-Dong Kang;Ping Wang;Hui-Ming Cheng .Advantage of TiF_3 over TiCl_3 as a dopant precursor to improve the thermo-dynamic property of Na_3AlH_6[J].Scripta materialia,2007(5):361-364. |
| [10] | Yin, LC;Wang, P;Fang, ZZ;Cheng, HM .Thermodynamically tuning LiBH4 by fluorine anion doping for hydrogen storage: A density functional study[J].Chemical Physics Letters,2008(4/6):318-321. |
| [11] | Yin LC;Wang P;Kang XD;Sun CH;Cheng HM .Functional anion concept: effect of fluorine anion on hydrogen storage of sodium alanate[J].Physical chemistry chemical physics: PCCP,2007(12):1499-1502. |
| [12] | Yongfeng Liu;Chao Li;Bo Li .Metathesis Reaction-Induced Significant Improvement in Hydrogen Storage Properties of the KF-Added Mg(NH2)2-2LiH System[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2013(2):866-875. |
| [13] | Yong Chen;Cheng-Zhang Wu;Ping Wang;Hui-Ming Cheng .Structure and hydrogen storage property of ball-milled LiNH_2/MgH_2 mixture[J].International journal of hydrogen energy,2006(9):1236-1240. |
| [14] | Leng HY;Ichikawa T;Hino S;Nakagawa T;Fujii H .Mechanism of hydrogenation reaction in the Li-Mg-N-H system[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2005(21):10744-10748. |
| [15] | Takayuki Ichikawa;Nobuko Hanada;Shigehito Isobe;Haiyan Leng;Hironobu Fujii .Mechanism of Novel Reaction from LiNH_2 and LiH to Li_2NH and H_2 as a Promising Hydrogen Storage System[J].The journal of physical chemistry. B, Condensed matter, materials, surfaces, interfaces & biophysical,2004(23):7887-7892. |
| [16] | Recyclable hydrogen storage system composed of ammonia and alkali metal hydride[J].International journal of hydrogen energy,2009(24):9760. |
| [17] | Teng, Y.-L.;Ichikawa, T.;Miyaoka, H.;Kojima, Y. .Improvement of hydrogen desorption kinetics in the LiH-NH_3 system by addition of KH[J].Chemical communications,2011(44):12227-12229. |
| [18] | Chen P;Xiong ZT;Yang LF;Wu GT;Luo WF .Mechanistic investigations on the heterogeneous solid-state reaction of magnesium amides and lithium hydrides[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(29):14221-14225. |
| [19] | Liu, YF;Zhong, K;Luo, K;Gao, MX;Pan, HG;Wang, QD .Size-Dependent Kinetic Enhancement in Hydrogen Absorption and Desorption of the Li-Mg-N-H System[J].Journal of the American Chemical Society,2009(5):1862-1870. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%