Hollow Macroporous Core/Mesoporous Shell Carbon with a Tailored Structure as a Cathode Electrocatalyst Support for Proton Exchange Membrane Fuel Cells

详细信息    查看全文

• 作者：Baizeng Fang ; Jung Ho Kim ; Cheolgyu Lee ; Jong-Sung Yu
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：January 17, 2008
• 年：2008
• 卷：112
• 期：2
• 页码：639 - 645
• 全文大小：522K
• 年卷期：v.112,no.2(January 17, 2008)
• ISSN：1932-7455

文摘

Well-tailored spherical carbon capsules with a hollow macroporous core of ca. 280 nm and a ca. 40 nm thickmesoporous shell were synthesized and explored for the first time as cathode catalyst support in proton exchangemembrane fuel cells (PEMFC). The unique structural characteristics of hollow core/mesoporous shell (HCMS)carbon including high specific surface area, large pore volume, uniform particle size, and well-developedthree-dimensionally interconnected bimodal porosity make it an ideal candidate as catalyst support for low-temperature fuel cells. Considerable improvements in electrocatalytic activity toward oxygen reduction reactionsand in fuel cell performance have been achieved by Pt(20 wt %) supported on the HCMS carbon (HCMSC)when compared with its counterpart, Pt supported on commonly used commercially available catalyst supportcarbon black Vulcan XC-72 (VC), suggesting that the HCMSC is an excellent and much more efficientcathode catalyst support than VC for PEMFC application.