Formic Acid Oxidation over Hierarchical Porous Carbon Containing PtPd Catalysts

被引:7
作者
Baena-Moncada, Angelica M. [1 ]
Morales, Gustavo M. [1 ]
Barbero, Cesar [1 ]
Planes, Gabriel A. [1 ]
Florez-Montano, Jonathan [2 ]
Pastor, Elena [2 ]
机构
[1] Univ Nacl Rio Cuarto, Dept Quim, Cordoba, Argentina
[2] Univ La Laguna, Dept Quim Fis, Inst Univ Mat & Nanotecnol, Tenerife 38071, Spain
来源
CATALYSTS | 2013年 / 3卷 / 04期
关键词
hierarchical porous carbon; PtPd catalysts; formic acid; FUEL-CELLS; MESOPOROUS CARBON; ELECTROOXIDATION; ELECTRODES; ADSORPTION; SUPPORT; DFAFC;
D O I
10.3390/catal3040902
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The use of high surface monolithic carbon as support for catalysts offers important advantage, such as elimination of the ohmic drop originated in the interparticle contact and improved mass transport by ad-hoc pore design. Moreover, the approach discussed here has the advantage that it allows the synthesis of materials having a multimodal porous size distribution, with each pore size contributing to the desired properties. On the other hand, the monolithic nature of the porous support also imposes new challenges for metal loading. In this work, the use of Hierarchical Porous Carbon (HPC) as support for PtPd nanoparticles was explored. Three hierarchical porous carbon samples (denoted as HPC-300, HPC-400 and HPC-500) with main pore size around 300, 400 and 500 nm respectively, are used as porous support. PtPd nanoparticles were loaded by impregnation and subsequent chemical reduction with NaBH4. The resulting material was characterized by EDX, XRD and conventional electrochemical techniques. The catalytic activity toward formic acid and methanol electrooxidation was evaluated by electrochemical methods, and the results compared with commercial carbon supported PtPd. The Hierarchical Porous Carbon support discussed here seems to be promising for use in DFAFC anodes.
引用
收藏
页码:902 / 913
页数:12
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