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先进碳纳米材料电极中的氢纳米计量学

Hydrogen Nanometrology in Advanced Carbon Nanomaterial Electrodes.

作者信息

Lobo Rui, Alvarez Noe, Shanov Vesselin

机构信息

Laboratory of Nanophysics/Nanotechnology and Energy (N2E), Center of Technology and Systems (CTS-UNINOVA), NOVA School of Science & Technology, FCT-NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.

Department of Physics, NOVA School of Science & Technology, FCT-NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.

出版信息

Nanomaterials (Basel). 2021 Apr 22;11(5):1079. doi: 10.3390/nano11051079.

DOI:10.3390/nano11051079
PMID:33922071
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8143510/
Abstract

A comparative experimental study between advanced carbon nanostructured electrodes, in similar hydrogen uptake/desorption conditions, is investigated making use of the recent molecular beam-thermal desorption spectrometry. This technique is used for monitoring hydrogen uptake and release from different carbon electrocatalysts: 3D-graphene, single-walled carbon nanotube networks, multi-walled carbon nanotube networks, and carbon nanotube thread. It allows an accurate determination of the hydrogen mass absorbed in electrodes made from these materials, with significant enhancement in the signal-to-noise ratio for trace hydrogen avoiding recourse to ultra-high vacuum procedures. The hydrogen mass spectra account for the enhanced surface capability for hydrogen adsorption in the different types of electrode in similar uptake conditions, and confirm their enhanced hydrogen storage capacity, pointing to a great potential of carbon nanotube threads in replacing the heavier metals or metal alloys as hydrogen storage media.

摘要

利用最近的分子束热脱附光谱法,在相似的氢吸收/解吸条件下,对先进的碳纳米结构电极进行了一项对比实验研究。该技术用于监测不同碳电催化剂(三维石墨烯、单壁碳纳米管网络、多壁碳纳米管网络和碳纳米管线)的氢吸收和释放。它能够精确测定由这些材料制成的电极中吸收的氢质量,显著提高痕量氢的信噪比,而无需采用超高真空程序。氢质谱说明了在相似吸收条件下不同类型电极中氢吸附表面能力的增强,并证实了它们增强的储氢能力,表明碳纳米管线在替代重金属或金属合金作为储氢介质方面具有巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/fee63b57b830/nanomaterials-11-01079-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/ee30366f6eee/nanomaterials-11-01079-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/25d15183283d/nanomaterials-11-01079-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/977c5be9976f/nanomaterials-11-01079-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/6c1f2f01a720/nanomaterials-11-01079-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/77289a6d6b9c/nanomaterials-11-01079-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/cd664a165c65/nanomaterials-11-01079-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/fee63b57b830/nanomaterials-11-01079-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/ee30366f6eee/nanomaterials-11-01079-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/25d15183283d/nanomaterials-11-01079-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/977c5be9976f/nanomaterials-11-01079-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/6c1f2f01a720/nanomaterials-11-01079-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/77289a6d6b9c/nanomaterials-11-01079-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/cd664a165c65/nanomaterials-11-01079-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4103/8143510/fee63b57b830/nanomaterials-11-01079-g007.jpg

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Nanomaterials (Basel). 2020 Feb 1;10(2):255. doi: 10.3390/nano10020255.
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Diffusion controlled multilayer electrocatalysts via graphene oxide nanosheets of varying sizes.通过不同尺寸氧化石墨烯纳米片实现扩散控制的多层电催化剂。
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分子束-热脱附光谱法(MB-TDS)监测储氢燃料电池阳极脱附的氢气
Materials (Basel). 2012 Feb 6;5(2):248-257. doi: 10.3390/ma5020248.
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