Hollow macroporous Core/Mesoporous shell carbon with a tailored structure as a cathode electrocatalyst support for proton exchange membrane fuel cells
Hollow macroporous Core/Mesoporous shell carbon with a tailored structure as a cathode electrocatalyst support for proton exchange membrane fuel cells
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DOI：
10.1021/jp710193s
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发表时间：
2008-01-17
影响因子：
3.7
通讯作者：
Yu, Jong-Sung
中科院分区：
文献类型：
--
作者：
Fang, Baizeng;Kim, Jung Ho;Yu, Jong-Sung
精心定制的球形碳胶囊与中空大孔核心约。280 nm和ca.合成了40 nm厚的介孔壳层，并首次将其用作质子交换膜燃料电池（PEMFC）阴极催化剂载体。中空核/介孔壳（HCMS）炭具有高比表面积、大孔体积、均匀的颗粒尺寸和良好的三维连通双峰孔隙结构，是低温燃料电池催化剂载体的理想选择。当与其对应物，负载在通常使用的市售催化剂载体炭黑Vulcan XC-72（VC）上的Pt相比时，通过负载在HCMS碳（HCMSC）上的Pt（20重量%）实现了对氧还原反应的电催化活性和燃料电池性能的显著改进，这表明HCMSC是一种比VC更有效的PEMFC阴极催化剂载体。
Well-tailored spherical carbon capsules with a hollow macroporous core of ca. 280 nm and a ca. 40 nm thick mesoporous shell were synthesized and explored for the first time as cathode catalyst support in proton exchange membrane 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-developed three-dimensionally interconnected bimodal porosity make it an ideal candidate as catalyst support for lowtemperature fuel cells. Considerable improvements in electrocatalytic activity toward oxygen reduction reactions and 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 support carbon black Vulcan XC-72 (VC), suggesting that the HCMSC is an excellent and much more efficient cathode catalyst support than VC for PEMFC application.