2) This experiment is based on different considers to observe the cell performance, including:The influence of catalyze reagent content, conclusion: (1)When Pt/C in the catalyze reagent is 0.1mg/cm~2, that the cell's performance is the best;
① 进行了催化剂含量的变化对电池性能的影响实验,催化剂中Pt/C的含量为0.1mg/cm~2时,其电池性能为最佳; ② 进而还研究了催化剂的超声波振荡时间对电池性能的影响实验,实验研究的结果表明,对催化剂的超声波振荡时间越长,所得的催化层越均匀,电池的性能也就越好;
According to the method, trace cobalt(Ⅱ ) in sulfuric acid solution (pH = 2. 0) may catalyze the discoloring oxidation reaction of neutral red by KIO4 and hydrogen peroxide. The new method for determination of trace cobalt has been developed. The linear range is 2 × 10-8 ～ 4 ×10-7g/ml and limit of detection is 1 ×10-8g/ml.
A new environmentally friendly catalyst, H4SiW12O40-polyaniline (PAn), was prepared, and n-butyraldehyde 1,2-propanediol acetal was synthesized from n-butyraldehyde and 1,2-propanediol in the presence of H4SiW12O40-PAn.
The influence factors of the synthesis were discussed, and the best reaction conditions were found: the molar ratio of n-butyraldehyde to 1,2-propanediol is 1:1.5, the amount of catalyst used is 1.2% of feed stock, and the reaction time is 1.0 h.
H4SiW12O40-PAn is an excellent catalyst for synthesizing n-butyraldehyde 1,2-propanediol acetal, and the yield can reach more than 95.2%.
The partial intermediate products were absorbed on TiO2 surface, which resulted in catalyst deactivation.
But when it was irradiated under UV illumination or solar irradiation for some time, the catalyst could be reused without loss of catalytic activity.