Length of SiNS can be controlled and varies linearly with the duration of catalyst etching process.
The catalyst also exhibited strong duration of methanol and good stability compared to commercial Pt/C catalysts.
The degree of sulfur poisoning of the lab-aged catalysts increased with the duration of low-temperature sulfur exposure and could not be recovered in atmospheres typical for normal driving conditions.
The optimization study was conducted by varying the oil:methanol ratio, catalyst loading, reaction temperature and duration.
When coupled with the dual pore configuration and catalysts with high reactivities, the time-release catalyst concept can extend the duration of higher powers to longer times, and result in maximum utilization of air electrode materials.
Based upon modeling and simulation, the typical operation mode, effects of the quenching ratio, the flow cycle duration, and the catalyst activity have been investigated.
These observations collectively suggest that the generation of reactive intermediate species "HCxNyOz", whose lifetime on the catalyst surface exceeds the cycle duration and which reacts with NOx to produce N2, are required to achieve conversion enhancement during high frequency operation.
To improve the catalytic performance, particularly with respect to the duration of the catalyst, YSZ (yttria-stabilized zirconia) is used as a support and noble metals such as Ru, Rh, Pd, and Ag are introduced as promoters.
The effect of pH on photocatalytic degradation rate of brilliant green dye (0.01 M) was assessed using 0.5 mg of catalyst load for 5-h duration under visible light source (Tungsten light-60 W, Philips) by varied pH from 2 to 12 adjusted using diluted HNO3 or NaOH solution.
Longer milling durations produced finer catalyst particle sizes and more uniform dispersions, but yielded higher hydrogen desorption temperatures.
The impact of catalytic reforming and catalyst regeneration process parameters on cycle duration and product quality was investigated.
