Novel nanotubes based on methylene-bridged cycloparaphenyleneas as highly efficient catalysts for oxygen evolution reaction

Hazem Abdelsalam,Omar H. Abd-Elkader, Mohamed A. Saad, Mahmoud A.S. Sakr,Qinfang Zhang

Computational and Theoretical Chemistry(2024)

引用 0|浏览1
暂无评分
摘要
Nanotubes constructed from methylene-bridged cycloparaphenyleneas (MCPPs) are investigated using density functional theory. The dynamical stability is indicated by the real vibrational frequencies of the infrared spectra. MCPPs are semiconductors with an energy gap of ∼ 2.9 eV that significantly decreases in the finite nanotubes. This decrease is a result of the interactive molecular orbitals that are localized at the pentagonal rings linking MCPPs. The UV–vis spectra show that transitions from the highest occupied and neighbor orbitals to the lowest unoccupied orbital dominate the primary absorption peaks. Oxygen evolution reaction shows that all the reaction intermediates, HO, O, and HOO are adsorbed by the pentagonal active sites. The considered nanotubes show good catalytic performance but the best performance is observed in the wider nanotubes with an overpotential of 0.10 V. This remarkably low overpotential in addition to the abundant active sites makes finite nanotubes from MCPPs exceptional catalysts for oxygen evolution.
更多
查看译文
关键词
Methylene-bridged cycloparaphenyleneas,Finite nanotubes,DFT,Electronic and optical properties,Oxygen evolution reaction
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要