Hydrogen Adsorption Characteristics of Au and Li Decorated Nanowires on Bulk Silicon

IF 3.3 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Silicon Pub Date : 2025-06-03 DOI:10.1007/s12633-025-03352-1

Orkun Ergürhan, Burcu Erdoğan

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引用次数: 0

Abstract

The issue of global warming is a consequence of the utilization of fossil fuels, with ongoing research endeavors aimed at identifying solutions. Hydrogen is regarded as one of the most promising fuels in the search for alternative energy sources to fossil fuels. This study investigates the hydrogen storage properties of silicon (Si) nanowires synthesized by a two-step metal-assisted chemical etching (MACE) process and subsequently functionalized with gold (Au) or lithium (Li). The MACE process was repeated for different metal deposition times, etching times and oxidant molarities. Furthermore, the surface of the samples was modified with Au and Li solutions of varying molarities (0.001 and 0.01 mM) at 5 and 15 s intervals. The results indicate that the BET specific surface area of the samples is influenced by the etching time and the molarity of the oxidant. Furthermore, the functionalization of the surface has been shown to result in a decrease in the BET specific surface area. The hydrogen storage capacities of the samples functionalized with Au and Li atoms range from 0.027 to 0.042 mmol.g⁻¹. Based on the current literature, this study reports the initial findings regarding the molecular hydrogen storage via physisorption on porous silicon nanowires functionalized with gold and lithium adatoms, synthesized using the MACE method, at a cryogenic temperature of 77 K and a pressure of 113 kPa.

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金、锂修饰纳米线在体硅上的氢吸附特性

全球变暖问题是使用化石燃料的后果，目前正在进行旨在确定解决办法的研究工作。在寻找化石燃料的替代能源时，氢被认为是最有前途的燃料之一。本研究研究了通过两步金属辅助化学蚀刻（MACE）工艺合成的硅（Si）纳米线的储氢性能，并随后用金（Au）或锂（Li）功能化。在不同的金属沉积时间、蚀刻时间和氧化剂摩尔浓度下重复MACE过程。此外，样品的表面以不同摩尔浓度（0.001和0.01 mM）的Au和Li溶液分别在5和15 s间隔内进行修饰。结果表明，样品的BET比表面积受腐蚀时间和氧化剂的摩尔浓度的影响。此外，表面的功能化已被证明会导致BET比表面积的减少。Au和Li原子功能化后的储氢量在0.027 ~ 0.042 mmol.g−1之间。在现有文献的基础上，本研究报告了在低温77 K、压力113 kPa条件下，用MACE方法合成的金、锂原子功能化多孔硅纳米线物理吸附储氢的初步研究结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

20.60%

发文量

685

审稿时长

>12 weeks

期刊介绍： The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.