Hydrogen Absorption at Room Temperature in Nanoscale Titanium Benzene Complexes

TL;DR

This study reports the first room temperature hydrogen absorption measurements in nanoscale titanium-benzene complexes, showing 6% absorption by weight under specific conditions, with degradation at higher benzene pressures.

Contribution

First experimental gravimetric measurements of hydrogen absorption in nanoscale titanium-benzene complexes at room temperature.

Findings

Achieved 6% hydrogen absorption by weight at low benzene pressure.

Absorption decreases with higher benzene pressures.

Results align with recent density functional theory predictions.

Abstract

In this letter we report the first room temperature gravimetric measurements of hydrogen absorption in nanoscale titanium-benzene complexes formed by laser ablation in a benzene atmosphere in a UHV chamber. We are able to obtain a 6% by weight absorption as predicted by recent density functional theory based calculations under the conditions of low benzene pressure (35 milli-torr) and for sub-monolayer samples. For samples synthesized under higher benzene pressures we find a systematic degradation of the hydrogen absorption.