โ Scribed by Daisuke Shimamoto; Hiroyuki Muramatsu; Kazunori Fujisawa; Takuya Hayashi; Yoong Ahm Kim; Morinobu Endo
No coin nor oath required. For personal study only.
Hydrogen peroxide (H 2 O 2 ) formation on Ketjen black ร EC300J, Vulcan XC-72R ร and acetylene black in sulfuric acid solution was investigated. For this purpose, an ultra-microanalysis system for H 2 O 2 was constructed. It was clarified that H 2 O 2 was produced through an oxygen reduction reaction on these carbon materials.
When oxidized acetylene blacks were employed, both the content of alcohol-like groups and the amounts of H 2 O 2 produced increased. It is, therefore, surmised that the alcohol-like groups on acetylene blacks mainly contribute to H 2 O 2 formation in a similar manner as the so-called "anthraquinone process", the practical method for H 2 O 2 production.
๐ SIMILAR VOLUMES
AASTRACTS 331 ment. The electron microscope (both in the scanning and transmission modes) was used to examine the topography of both wet (60% HNOs, 118ยฐC) and dry oxidized (air, 700ยฐC) fibers as well as fracture surfaces of composites made with treated and untreated fibers. The flexural strength of
The relations between chemical vapor deposition (CVD) parameters and the resultant pyrolytic carbon microstructures have been examined for matrix deposition in fibrous carbon substrates. The parameters considered are temperature (1200-145O"C), pressure (20-630 Torr), C/H ratio (l/4-1/14), total flow
Carbon fibers grown by pyrolysis of natural gas were heat-treated at temperatures ranging from 1400 to 3OOO"C, and characterized by X-ray diffraction. Their electrical resistivity is reported for temperatures between 10 and 370 K, and explained for heat treatment above 2200ยฐC using a simple graphiti