• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Fe–Mn bimetallic oxides-catalyzed oxygen reduction reaction in alkaline direct methanol fuel cells
【24h】

Fe–Mn bimetallic oxides-catalyzed oxygen reduction reaction in alkaline direct methanol fuel cells

机译：碱性直接甲醇燃料电池中Fe–Mn双金属氧化物催化的氧还原反应

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two Fe–Mn bimetallic oxides were synthesized through a facile solvothermal method without using any templates. Fe _(2) O _(3) /Mn _(2) O _(3) is made up of Fe _(2) O _(3) and Mn _(2) O _(3) as confirmed via XRD. TEM and HRTEM observations show Fe _(2) O _(3) nanoparticles uniformly dispersed on the Mn _(2) O _(3) substrate and a distinct heterojunction boundary between Fe _(2) O _(3) nanoparticles and Mn _(2) O _(3) substrate. MnFe _(2) O _(4) as a pure phase sample was also prepared and investigated in this study. The current densities in CV tests were normalized to their corresponding surface area to exclude the effect of their specific surface area. Direct methanol fuel cells (DMFCs) were equipped with bimetallic oxides as cathode catalyst, PtRu/C as the anode catalyst and PFM as the electrolyte film. CV and DMFC tests show that Fe _(2) O _(3) /Mn _(2) O _(3) (3?:?1) exhibits higher oxygen reduction reaction (ORR) activity than Fe _(2) O _(3) /Mn _(2) O _(3) (1?:?1), Fe _(2) O _(3) /Mn _(2) O _(3) (1?:?3), Fe _(2) O _(3) /Mn _(2) O _(3) (5?:?1) and MnFe _(2) O _(4) . The much superior catalytic performance is due to its larger surface area, the existence of numerous heterojunction interfaces and the synergistic effect between Fe _(2) O _(3) and Mn _(2) O _(3) , which can provide numerous catalytic active sites, accelerate mass transfer, and increase ORR efficiency.
机译：通过简便的溶剂热法合成了两种Fe-Mn双金属氧化物，无需使用任何模板。通过XRD确认，Fe _（2）O _（3）/ Mn _（2）O _（3）由Fe _（2）O _（3）和Mn _（2）O _（3）组成。 TEM和HRTEM观察显示Fe _（2）O _（3）纳米粒子均匀分散在Mn _（2）O _（3）衬底上，并且Fe _（2）O _（3）纳米粒子与Mn之间存在明显的异质结边界_（2）O _（3）基板。还制备了作为纯相样品的MnFe _（2）O _（4）并在本研究中进行了研究。将CV测试中的电流密度归一化为其对应的表面积，以排除其比表面积的影响。直接甲醇燃料电池（DMFC）配备有双金属氧化物作为阴极催化剂，PtRu / C作为阳极催化剂和PFM作为电解质膜。 CV和DMFC测试表明Fe _（2）O _（3）/ Mn _（2）O _（3）（3？：？1）的氧还原反应（ORR）活性比Fe _（2）O高_（3）/ Mn _（2）O _（3）（1？：？1），Fe _（2）O _（3）/ Mn _（2）O _（3）（1？：？3 ），Fe _（2）O _（3）/ Mn _（2）O _（3）（5？：？1）和MnFe _（2）O _（4）。优异的催化性能是由于其较大的表面积，大量异质结界面的存在以及Fe _（2）O _（3）和Mn _（2）O _（3）之间的协同效应，可提供大量催化活性位点，加速质量转移，提高ORR效率。

著录项

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