...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electrocatalysis >Comparative Electrochemical and Spectroscopic Studies of Ethanol Oxidation on Pt(h,k,l) Modified by Osmium Nanoislands
【24h】

Comparative Electrochemical and Spectroscopic Studies of Ethanol Oxidation on Pt(h,k,l) Modified by Osmium Nanoislands

机译：Nano纳米岛修饰的Pt（h，k，l）上乙醇氧化的电化学和光谱比较研究

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

This work reports the electrochemical and spectroscopic studies of ethanol electrooxidation on the platinum single-crystal electrodes (111, 100, 110) surface-modified by different coverage degrees of osmium. In general, after deposition of osmium (θ Os = 0.40–0.50), an increase in the voltammetric current of ethanol oxidation was observed, indicating an enhancement of the catalytic activity of the electrode. According to Fourier transformed infrared results, the mechanistic pathway for this reaction depends directly on the degree of osmium coverage. Thus, for low osmium coverage (θ Os 0.20), the formation of CO as an intermediate is favored, giving CO2 as the main final product; for intermediate osmium coverage (θ Os = 0.25–0.50), the acetaldehyde formation is enhanced; and for higher osmium coverage (θ Os 0.92), the catalytic activity for ethanol oxidation tends to decrease, producing insignificant amounts of CO and CO2. Moreover, at this surface, the direct oxidation of ethanol to acetic acid (pathway not interesting for energetic ends) is also observed at lower potentials.
机译：这项工作报告了乙醇的电氧化和光谱学研究，该表面在被不同的coverage覆盖度改性的铂单晶电极（111、100、110）上。通常，在deposition沉积后（θOs = 0.40–0.50），观察到乙醇氧化的伏安电流增加，表明电极的催化活性增强。根据傅立叶变换的红外结果，该反应的机理途径直接取决于of的覆盖程度。因此，对于低coverage含量（θOs <0.20），有利于形成CO作为中间体，以CO2 为主要最终产物。在中等intermediate含量（θOs = 0.25–0.50）下，乙醛的形成得到增强。对于较高的coverage覆盖率（θOs 。此外，在该表面上，还以较低的电势观察到乙醇直接氧化成乙酸（对于高能末端不感兴趣的途径）。

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