• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Effect of bimodal mesoporous carbon as PtRu catalyst support for direct methanol fuel cells
【24h】

Effect of bimodal mesoporous carbon as PtRu catalyst support for direct methanol fuel cells

机译：双峰介孔碳作为PTRU催化剂对直接甲醇燃料电池的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Mesoporous carbons (MCs) with different pore sizes were synthesized and evaluated as a catalyst support for fuel cells. The MCs were obtained from resorcinol-formaldehyde precursors, polymerized in the presence of polydiallyldimethylammonium chloride (cationic polyelectrolyte) as a structuring agent and commercial silica (Sipernat (R) or Aerosil (R)) as the hard template. The MC obtained with Aerosil (R) shows a broad pore size distribution with a maximum at 21 nm. On the other hand, the MCs with Sipernat (R) show a bimodal pore size distribution, with a narrow peak centered at 5 nm and a broad peak with a maximumca.30 nm. All MCs present a high specific surface area (800-1000 m(2)g(-1)) and total pore volume ranging from 1.36 to 1.69 cm(3)g(-1). PtRu nanoparticles were deposited onto the MC support by an impregnation-reduction method with NaBH(4)at 80 degrees C in basic media. The electrochemical characterization reveals improved electrocatalysis towards the methanol oxidation for the catalyst deposited over the carbon with the highest total pore volume. This catalyst also presented the highest CO(2)conversion efficiency,ca.80%, for the methanol oxidation as determined by differential electrochemical mass spectroscopy analysis. Moreover, the catalyst as a fuel cell anode showed the best performance, reaching a power density of 125 mW cm(-2)at 90 degrees C with methanol as fuel and dry O-2.
机译：合成具有不同孔径尺寸的中孔碳（MCS）并评价为燃料电池的催化剂载体。将MCS从间苯二酚 - 甲醛前体中获得，在聚物二甲基氯化铵（阳离子聚电解质）存在下作为结构剂和商业二氧化硅（Sipernat（R）或AeroSil）作为硬模板。用Aerosil获得的MC显示宽孔径分布，最大在21nm。另一方面，具有腹股沟（R）的MCS显示了双峰孔径分布，窄峰以5nm为中心，宽峰，具有最高CA.30 nm。所有MCS呈现出高比表面积（800-1000米（2）克（-1））和总孔体积，范围为1.36至1.69cm（3）g（-1）。通过在80℃的碱性培养基中沉积PTRU纳米粒子通过浸渍还原方法沉积在MC载体上。电化学表征揭示了在沉积在碳上沉积在碳上的甲醇氧化的改善的电常分。该催化剂还呈现了甲醇氧化的最高CO（2）转化效率，Ca.80％，如差异电化学质谱分析所确定的。此外，作为燃料电池阳极的催化剂显示出最佳性能，在90℃下达到125mm cm（-2）的功率密度，用甲醇作为燃料和干燥的O-2。

著录项

  • 来源
    《RSC Advances》 |2020年第51期|共9页
  • 作者

    Montiel Gonzalo; Fuentes-Quezada Eduardo; Bruno Mariano M.; Corti Horacio R.; Viva Federico A.;

  • 作者单位

    Inst Nacl Tecnol Ind Av Gen Paz 5445 San Martin Buenos Aires Argentina;

    Comis Nacl Energia Atom Dept Fis Mat Condensada Av Gen Paz 1499 San Martin Buenos Aires Argentina;

    Univ Nacl Rio Cuarto Fac Cs Exactas Fis Quim &

    Nat Dept Quim Inst Invest Tecnol Energet &

    Mat Avanzados IITEMA RA-5800 Rio Cuarto Argentina;

    Comis Nacl Energia Atom Dept Fis Mat Condensada Av Gen Paz 1499 San Martin Buenos Aires Argentina;

    Comis Nacl Energia Atom Dept Fis Mat Condensada Av Gen Paz 1499 San Martin Buenos Aires Argentina;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号