Enhancing hydrogen storage on carbon nanotubes via hybrid chemical etching and Pt decoration employing supercritical carbon dioxide fluid

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/103380

Title:	Enhancing hydrogen storage on carbon nanotubes via hybrid chemical etching and Pt decoration employing supercritical carbon dioxide fluid
Authors:	蔡秉儒;Tsai, Pin-Ju;Yang, Cheng-Hsien;Hsu, Wei-Che;Tsai, Wen-Ta;Chang, Jeng-Kuei
Contributors:	理學院光電科學與工程學系
Keywords:	Acidic etching;Alternative fuels. Production and utilization;Applied sciences;Carbon nanotube;Decoration;Energy;Exact sciences and technology;Fuels;High pressure thermal gravimetric microbalance;Hydrogen;Pt particle decoration;Supercritical CO2 fluid
Date:	2012-04-01
Issue Date:	2026-04-23 11:29:21 (UTC+8)
Publisher:	Elsevier Ltd.;Kidlington: Elsevier Ltd
Abstract:	摘要： Acidic etching and Pt particle decoration were applied to modify the hydrogen absorption behavior of carbon nanotubes (CNTs). Two different acidic solutions, namely H2SO4/HNO3 and FeSO4/H2SO4/H2O2, were used for etching treatment. A novel electroless deposition process, incorporating supercritical CO2 (sc-CO2) fluid, was used to decorate finely-dispersed nano-sized Pt particles on CNTs. The hydrogen storage capacities of various modified CNTs were measured by using a high pressure thermal gravimetric microbalance (HPTGA). The experimental results showed that acidic etching could increase the surface defect density and lead to open-up of the caps of CNTs, resulting in an increase in the active adsorption site for physical sorption of H2. The electroless deposition of nano-Pt particles on CNTs, using conventional electrolyte, could promote chemical sorption of hydrogen via spillover mechanism. By employing sc-CO2 bath, the Pt particle size became much finer and more uniformly distributed on the surfaces of CNTs, giving rise to a high hydrogen storage capacity. When a hybrid process including sc-CO2 Pt decoration following acidic etching was applied to modify CNTs, a substantial enhancement of hydrogen storage capacity (about 2.7 wt%) was observed. ► Pt particle decoration onto CNTs can be performed in sc-CO2 in emulsion. ► Acidic etching can assist hydrogen entry and increase hydrogen adsorption sites. ► Combined acidic etching and Pt decoration enhance hydrogen adsorption capacity. 出版者： Kidlington: Elsevier Ltd 出版日期： 2012-04-01 出處： International journal of hydrogen energy, 2012-04, Vol.37 (8), p.6714-6720 資源來源： Elsevier ScienceDirect Journals Complete - Autoholdings 版權： 2012 Hydrogen Energy Publications, LLC. 版權： 2014 INIST-CNRS 識別號： ISSN: 0360-3199 識別號： EISSN: 1879-3487 識別號： DOI: 10.1016/j.ijhydene.2012.01.032 識別號： CODEN: IJHEDX
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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