高分散度Pt/C电催化剂的制备

Preparation of well-dispersed Pt/C electocatalysts

Cabot公司VulcanXC 72型炭黑,经过H2O2氧化处理后作为Pt的载体,H2PtCl6作为金属前驱体制备了高度分散的Pt/C催化剂。讨论了不同条件下H2PtCl6在炭黑上的吸附性能。载体经过H2O2氧化处理24h,H2PtCl6在pH=9下吸收48h,H2350℃还原2h,可以制备出铂晶粒平均大小为1.8nm的Pt/C电催化剂。

Subjected to an oxidizing treatment with H2O2, Vulcan XC72 (Cabot) carbon black has been used as support for platinum. Using H2PtCl6 as metal precursor, welldispersed catalysts have been prepared. The adsorption mechanism of platinum onto carbon black which was affected by different conditions has also been discussed. Carbon blacksupported Pt electrocatalysts with the platinum particles having the average size of 1.8nm have been achieved. In the progress of preparation, carbon black was pretreated by H2O2, H2PtCl6 was adsorpted when pH of the solution was 9.0 and the catalysts were reduced in hydrogen at temperature of 350℃.