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由粗晶镁和纳米尺寸的镍（铁）前驱体制备的MgNi(Fe)H纳米颗粒中的储氢性能

Hydrogen storage in MgNi(Fe)H nano particles synthesized from coarse-grained Mg and nano sized Ni(Fe) precursor.

作者信息

Chen Xi, Zou Jianxin, Huang Shuqing, He Guangli, Zhao Ning, Zeng Xiaoqin, Ding Wenjiang

机构信息

National Engineering Research Center of Light Alloy Net Forming, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University Shanghai 200240 P. R. China

Shanghai Engineering Research Center of Mg Materials and Applications, School of Materials Science and Engineering, Shanghai Jiao Tong University Shanghai 200240 P. R. China.

出版信息

RSC Adv. 2018 May 23;8(34):18959-18965. doi: 10.1039/c8ra01963k. eCollection 2018 May 22.

DOI:10.1039/c8ra01963k
PMID:35539653
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9080607/
Abstract

In this work, MgNi(Fe)H was synthesized using precursors of nano Ni(Fe) composite powder prepared through arc plasma method and coarse-grained Mg powder. The microstructure, composition, phase components and the hydrogen storage properties of the Mg-Ni(Fe) composite were carefully investigated. It is observed that the MgNi(Fe)H particles formed from the Mg-Ni(Fe) composite have a diameter of 100-240 nm and a portion of Fe in the Ni(Fe) nano particles transformed into α-Fe nano particles with the diameter of 40-120 nm. DSC measurements showed that the peak desorption temperature of the MgNi(Fe)H was reduced to 501 K and the apparent activation energy for hydrogen desorption of the MgNi(Fe)H was 97.2 kJ mol H. The formation enthalpy of MgNi(Fe)H was measured to be -53.1 kJ mol H. The improvements in hydrogen sorption kinetics and thermodynamics can be attributed to the catalytic effect from α-Fe nano particles and the destabilization of MgNiH caused by the partial substitution of Ni by Fe, respectively.

摘要

在本工作中，采用电弧等离子体法制备的纳米Ni(Fe)复合粉末前驱体和粗晶Mg粉末合成了MgNi(Fe)H。对Mg-Ni(Fe)复合材料的微观结构、组成、相成分和储氢性能进行了仔细研究。观察到由Mg-Ni(Fe)复合材料形成的MgNi(Fe)H颗粒直径为100-240nm，Ni(Fe)纳米颗粒中的一部分Fe转变为直径为40-120nm的α-Fe纳米颗粒。DSC测量表明，MgNi(Fe)H的解吸峰值温度降至501K，MgNi(Fe)H的氢解吸表观活化能为97.2kJ/mol H。测得MgNi(Fe)H的生成焓为-53.1kJ/mol H。氢吸附动力学和热力学的改善可分别归因于α-Fe纳米颗粒的催化作用和Fe对Ni的部分取代导致的MgNiH的失稳。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/1d90cdb77b91/c8ra01963k-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/ea2ec1d7886f/c8ra01963k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/7eb64895cc88/c8ra01963k-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/20abbbe11875/c8ra01963k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/1d90cdb77b91/c8ra01963k-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/c67cf81b4d16/c8ra01963k-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/e4f49e522571/c8ra01963k-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/9fe943e47c07/c8ra01963k-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/3559648b615d/c8ra01963k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/ea2ec1d7886f/c8ra01963k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/7eb64895cc88/c8ra01963k-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/20abbbe11875/c8ra01963k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34f1/9080607/1d90cdb77b91/c8ra01963k-f8.jpg

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本文引用的文献

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Thermal desorption of hydrogen from Mg2Ni hydrogen storage materials.镁镍储氢材料中氢的热脱附
J Nanosci Nanotechnol. 2011 Jul;11(7):6499-503. doi: 10.1166/jnn.2011.4509.