プラズマ支援熱フィラメント化学気相成長法で気相合成したナノカーボン微粒子の水素貯蔵特性

摘要

By thermal desorption spectroscopy (TDS), we evaluated the hydrogen storage properties of carbon fine particles including single-wall carbon nanotubes (SWNTs) synthesized by plasma-assisted hot filament chemical vapor deposition, along with commercialized single-wall carbon nanotubes. Two hydrogen desorption peaks, one between 100 and 200℃ and the other between 500 and 600℃, were observed for the carbon fine particles as well as for SWNTs in the spectra of TDS. Activation energy determined by varying raising temperature revealed that the lower-temperature peak is derived from physisorbed hydrogen. Peaks of CO desorption from the carbon fine particles, which appeared by the oxidation of carbon, were also observed around the higher-peak temperature. The result suggests that synthesized carbon fine particles contain a lot of defects and bents with large specific surface areas, which have the potential of larger amount of hydrogen adsorption.%プラズマ支援熱フィラメソトCVD法を用いて作製した，SWNTを含むカーボン微粒子の水素貯蔵特性に関するTDS分析を行った．M／Q＝2のTDSスペクトルには，100－200℃の低温側と500－600℃の高温側付近にピークがあり，低温側のピークは，市販のCoMoCATに比べて1桁程度大きかった．