• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Symposium on Energy and Electrochemical Processes for a Cleaner Environment, 2001, San Francisco, CA >NEW BIMETALLIC CATALYSTS FOR OXYGEN DIFFUSION CATHODE IN THE MEMBRANE BRINE ELECTROLYSIS PROCESS
【24h】

NEW BIMETALLIC CATALYSTS FOR OXYGEN DIFFUSION CATHODE IN THE MEMBRANE BRINE ELECTROLYSIS PROCESS

机译：膜膜电解过程中氧扩散阴极的新双金属催化剂。

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

A new oxygen reduction reaction (ORR) bimetallic catalyst, Ag-Pt/C, is physically and electrochemically characterized. XRD and analytic-TEM reveal small particles exhibit high platinum concentration, whereas large ones content more silver. The catalyst active area of platinum is determined by hydrogen-adsorption voltammelry. The ORR mechanism, studied on RRDE, involves 4 electrons per oxygen molecule on Pt/C and Ag- Pt/C and has a first order towards oxygen. Both catalysts ORR kinetic parameters are comparable in 1 M NaOH at 25℃. A temperature increase favours the ORR kinetics, whereas a soda concentration increase is slightly detrimental to Pt/C. In industrial medium, Ag-Pt/C is competitive to Pt/C. Ageing tests performed in industrial medium reveal Ag-Pt/C better stability: unlike Pt/C, it does not deteriorate when exposed in highly corrosive soda solution, exhibiting silver beneficial influence. Finally, Ag-Pt/C good stability and electroactivity render this new air-cathode catalyst promising for the brine electrolysis process.
机译：物理和电化学表征了一种新型的氧还原反应（ORR）双金属催化剂Ag-Pt / C。 XRD和分析TEM显示小颗粒显示出较高的铂浓度，而大颗粒则包含更多的银。铂的催化剂活性面积通过氢吸附伏安法确定。在RRDE上研究的ORR机理，每个氧分子在Pt / C和Ag- Pt / C上涉及4个电子，并且对氧具有第一阶。两种催化剂的ORR动力学参数在25℃1 M NaOH中均相当。温度升高有利于ORR动力学，而苏打浓度升高对Pt / C略有不利。在工业介质中，Ag-Pt / C相对于Pt / C具有竞争力。在工业介质中进行的老化测试表明，Ag-Pt / C具有更好的稳定性：与Pt / C不同，它在高腐蚀性苏打溶液中暴露时不会变质，对银具有有益的影响。最后，Ag-Pt / C的良好稳定性和电活性使这种新型空气阴极催化剂有望用于盐水电解过程。

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