Temperature dependence for the reduction of water to hydrogen by reduced methyl viologen on platinum
作者:Milica T. Nenadović、Olga I. Mićić、Radoslav R. Adžić
DOI:10.1039/f19827801065
日期:——
The electron-transfer reactions from methyl viologen monocation radicals to colloidal platinum hydrosols were studied using the pulse-radiolysis technique. Besides the reduction of water, hydrogenation of methyl viologen on platinum also takes place in these reactions. Evolution of hydrogen is enhanced at higher temperatures (65 °C) and reduction of MV+ is hindered. The reaction shows complex behaviour
使用脉冲辐射分解技术研究了从甲基紫精单阳离子自由基到胶体铂水溶胶的电子转移反应。除了还原水以外,在这些反应中还发生了甲基紫精在铂上的氢化。在较高的温度(65°C)下,氢的释放增加,并且阻碍了MV +的降低。该反应在氢存在下表现出复杂的行为,这是因为形成了还原产物,该还原产物降低了铂的催化活性。在存在2.5×10 –5 mol dm –3的条件下,反应速率从氩气饱和溶液中的1.3×10 3 s –1降至氢饱和溶液中的0.6 s –1。 铂水溶胶。