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arXiv 2503.23902cond-mat.mtrl-sci
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铬功能化石墨烯的储氢潜力:第一性原理研究

Hydrogen Storage Potential of Chromium-Functionalized Graphene: A First-Principles Investigation

Pratyasha Tripathy, Hetvi Jadav, Himanshu Pandey

AI总结:

本文通过第一性原理与分子动力学计算,比较Cr吸附在缺陷和无缺陷石墨烯上的储氢结合能及室温热稳定性。

摘要:

吸附材料,例如包覆Cr的石墨烯基体系,正被研究作为潜在的储氢材料。石墨烯是一种具有高表面体积比的二维材料,已得到应用。本文利用Cr吸附,对具有单空位缺陷的石墨烯体系与无缺陷石墨烯体系进行了比较。为验证储氢有效性,研究在考虑和不考虑Van der Waals相互作用的情况下分别开展了ab initio计算。通过计算体系的结合能来评估效率。根据美国能源部的标准,可逆储氢的理想结合能范围为0.2至0.6 eV。为预测高效材料在室温下的稳定性,本研究利用分子动力学计算描绘其热稳定性谱。

英文摘要:

Sorbent materials, such as graphene-based systems coated with Cr, are being investigated as potential hydrogen storage materials. Graphene, a 2D material with a high surface-to-volume ratio, has been employed. A comparison is conducted between graphene systems with single vacancy defects and those without defects, using Cr adsorption. To verify the effectiveness of hydrogen storage, ab initio calculations are carried out both with and without Van der Waals interactions. The system's binding energy is calculated to assess efficiency. According to the Department of Energy in the United States, the ideal range for binding energy for reversible hydrogen storage is between 0.2 and 0.6 eV. To anticipate the stability of the efficient materials at room temperature, this work exploits the molecular dynamics computations to depict their thermal stability spectrum.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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