کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
194070 | 459784 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of acid/base treatment to carbon blacks on preparation of carbon-supported platinum nanoclusters Effect of acid/base treatment to carbon blacks on preparation of carbon-supported platinum nanoclusters](/preview/png/194070.png)
Carbon-supported metal nanoclusters as fuel-cell catalyst electrodes were prepared by a chemical method of H2PtCl6 reduction on acid/base-treated carbon blacks (CBs). The size and the loading efficiency of the metal clusters were dependent on the preparation method and the surface characteristics of the CBs. In the process of catalyst preparation, the NaOH concentration was a critical factor in obtaining Pt nanoclusters of small size and high loading efficiency. When the NaOH concentration was 1.0 M, carbon-supported Pt nanoclusters of 3.1 nm average size and 90% loading efficiency were obtained. The Pt clusters deposited on base-treated CBs showed the smallest particle size, 2.65 nm, and the highest loading efficiency, 97%. By contrast, the Pt clusters were ineffectively deposited on acid-treated CBs. Accordingly, the Pt catalysts deposited on the base-treated CBs showed enhanced electroactivity compared with those deposited on virgin CBs.
Journal: Electrochimica Acta - Volume 52, Issue 9, 15 February 2007, Pages 3013–3021