运用电化学阻抗谱和循环伏安法研究了在1 mol/L L iPF6-EC/DEC/DMC电解液中,不同甲醇杂质含量对石墨电极性能的影响及其机制.结果表明,甲醇对石墨电极性能的影响与电解液中甲醇的含量有关;其对石墨电极性能的影响机制为甲醇在2.0 V左右...运用电化学阻抗谱和循环伏安法研究了在1 mol/L L iPF6-EC/DEC/DMC电解液中,不同甲醇杂质含量对石墨电极性能的影响及其机制.结果表明,甲醇对石墨电极性能的影响与电解液中甲醇的含量有关;其对石墨电极性能的影响机制为甲醇在2.0 V左右还原生成的甲氧基锂沉积在石墨电极表面上,形成一层初始SEI膜,影响了EC的还原分解成膜过程.展开更多
研究了化学镀 N i-P-B合金溶液的稳定性和镀层的结构。结果表明 ,增大镀液中硫酸镍、硼氢化钠、次亚磷酸钠浓度及溶液的 p H值 ,会降低镀液的稳定性 ,而甲酸浓度增大则会显著改善镀液的稳定性。镀层中硼含量增加使磷含量下降 ,且镀层结...研究了化学镀 N i-P-B合金溶液的稳定性和镀层的结构。结果表明 ,增大镀液中硫酸镍、硼氢化钠、次亚磷酸钠浓度及溶液的 p H值 ,会降低镀液的稳定性 ,而甲酸浓度增大则会显著改善镀液的稳定性。镀层中硼含量增加使磷含量下降 ,且镀层结构由非晶向微晶转变。镀层硬度随硼含量增加而增大 ,40展开更多
The active surface structure of AgMoO 2PO 4·MoO 3 catalyst was investigated by in situ confocal microprobe Raman spectroscopy, evaluation of catalytic performance, XRD and XPS techniques. The results show that Mo...The active surface structure of AgMoO 2PO 4·MoO 3 catalyst was investigated by in situ confocal microprobe Raman spectroscopy, evaluation of catalytic performance, XRD and XPS techniques. The results show that MoO 3 and [Mo 7O 24 ] 6- may be reconstructed to [Mo 6O 19 ] 2- under the reaction conditions. The structure change only occurred on the catalyst surface, and thus [Mo 6O 19 ] 2- may be an active dynamic surface structure responsible for the better catalytic performance of selective oxidation of propane.展开更多
文摘运用电化学阻抗谱和循环伏安法研究了在1 mol/L L iPF6-EC/DEC/DMC电解液中,不同甲醇杂质含量对石墨电极性能的影响及其机制.结果表明,甲醇对石墨电极性能的影响与电解液中甲醇的含量有关;其对石墨电极性能的影响机制为甲醇在2.0 V左右还原生成的甲氧基锂沉积在石墨电极表面上,形成一层初始SEI膜,影响了EC的还原分解成膜过程.
文摘The active surface structure of AgMoO 2PO 4·MoO 3 catalyst was investigated by in situ confocal microprobe Raman spectroscopy, evaluation of catalytic performance, XRD and XPS techniques. The results show that MoO 3 and [Mo 7O 24 ] 6- may be reconstructed to [Mo 6O 19 ] 2- under the reaction conditions. The structure change only occurred on the catalyst surface, and thus [Mo 6O 19 ] 2- may be an active dynamic surface structure responsible for the better catalytic performance of selective oxidation of propane.
