...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Phase pure alpha-Mn2O3 prisms and their bifunctional electrocatalytic activity in oxygen evolution and reduction reactions
【24h】

Phase pure alpha-Mn2O3 prisms and their bifunctional electrocatalytic activity in oxygen evolution and reduction reactions

机译：纯相α-Mn2O3棱镜及其在氧释放和还原反应中的双功能电催化活性

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

Synthesizing manganese oxide materials with exact control of the nanoparticle shape and phase is difficult, making it challenging to understand the influence of the surface structure on electrocatalysis. Here we describe an inexpensive, low-temperature method to synthesize single-crystal orthorhombic phase alpha-Mn2O3 prisms bound by the {100} facets. The synthesis is the first method to use the cation bridging effect to assist in the creation of alpha-Mn2O3 prisms. According to structural analysis using X-ray diffraction, X-ray pair-distribution function (PDF) measurements and high resolution transmission electron microscopy, the material is composed exclusively of alpha-Mn2O3 prisms, and no additional amorphous or nanocrystalline phases are present. Heating the prisms transformed the material to a more symmetrical, cubic phase alpha-Mn2O3 that exhibited strong bifunctional electrocatalytic activity for the oxygen evolution (OER) and oxygen reduction (ORR) reactions. We compared the oxygen electrode activities (OEA) and found that the alpha-Mn2O3 prisms performed 79% better than commercially- produced alpha-Mn2O3 powders, indicating that these alpha-Mn2O3 prisms perform well as inexpensive, earth-abundant materials for reversible electrodes.
机译：难于精确控制纳米颗粒形状和相的氧化锰材料的合成是困难的，这使得理解表面结构对电催化的影响具有挑战性。在这里，我们描述了一种廉价的低温方法来合成由{100}小平面约束的单晶正交相α-Mn2O3棱镜。合成是第一种使用阳离子桥联效应来协助生成α-Mn2O3棱镜的方法。根据使用X射线衍射，X射线对分布函数（PDF）测量和高分辨率透射电子显微镜进行的结构分析，该材料仅由α-Mn2O3棱镜组成，并且不存在其他无定形或纳米晶相。加热棱镜将材料转变为更对称的立方相α-Mn2O3，对氧释放（OER）和氧还原（ORR）反应显示出强大的双功能电催化活性。我们比较了氧气电极的活性（OEA），发现α-Mn2O3棱镜的性能比商业生产的α-Mn2O3粉末好79％，这表明这些α-Mn2O3棱镜作为廉价，可再生电极的地球富裕材料表现良好。

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