A study on the hydrolytic properties of CaxSiy alloys

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science Pub Date : 2024-10-21 DOI:10.1007/s10853-024-10286-3

Yican Chu, Zhendong Yao, Min Liu, Wenqing Li, Jing Gu, Zhenguang Huang, Jiaxing Xie, Chao Li, Yongfu Cui, Yun Li, Meiqiang Fan

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Abstract

The hydrolysis of silicon and its compounds to produce hydrogen for fuel cell remains a major problem. The main obstacle is the weak hydrolytic activity and slow kinetics of silicon. In this work, the alloying properties of Si and Ca to improve its hydrolytic activity, and studied the film breaking effect of different metals and halogen ions on its passivation layer. The results show that the hydrogen production of the alloy is still determined by its phase composition. Among the common metal (Ni, Bi, Sn) and halogen ions (F^–, Cl^–) catalyzed by hydrolysis, Ni and F^– showed a good synergistic effect, resulting in a hydrogen yield of 269 mL/g at room temperature without alkali.

Graphical Abstract

The effects of metal ions and halogens on the hydrolytic properties of Ca–Si alloy were investigated, and Ni²⁺ and F^— showed good synergistic effect.

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关于 CaxSiy 合金水解特性的研究

水解硅及其化合物以产生用于燃料电池的氢气仍然是一个主要问题。其主要障碍是硅的水解活性弱、动力学速度慢。在这项工作中，利用硅和钙的合金特性来提高其水解活性，并研究了不同金属和卤素离子对其钝化层的破膜效应。结果表明，合金的产氢量仍由其相组成决定。在常见的金属离子（Ni、Bi、Sn）和卤素离子（F-、Cl-）催化水解中，Ni 和 F- 表现出良好的协同效应，在室温无碱条件下的产氢量达到 269 mL/g。

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

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.