• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the Chemical Society of Japan >Development of Innovative Three-Way Catalysts Containing Ceria-Zirconia Solid Solutions with High Oxygen Storage/Release Capacity
【24h】

Development of Innovative Three-Way Catalysts Containing Ceria-Zirconia Solid Solutions with High Oxygen Storage/Release Capacity

机译：开发具有高储氧/释放氧能力的氧化铈-锆固溶体的创新型三效催化剂

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

Innovative three-way catalysts containing ceria-zirconia solid solutions (CZ) with a ZrCh content ranging from 5 to 75 mol% were developed.Such catalysts have very high oxygen storage/release capacity (OSC).The OSC of catalysts containing first-generation CZ was found to increase linearly with the amount of zirconia dissolved in the solid solution in the 0-20 mol% ZrO_2 range.The thermal stability of the catalyst containing first-generation CZ was higher than that containing ceria.Second-generation CZ with greater OSC than first-generation CZ was developed by a homogeneous coprecipitation process,followed by heat-treatment below 1000 deg C,enabling dissolution of zirconia into ceria up to 75 mol% zirconia as estimated by XRD.Third-generation CZ,CZ-doped alumina (ACZ),was developed by homogeneous coprecipitation based on the "diffusion barrier concept".The OSC of ACZ was 23 times larger than that of pure ceria.The NOx emission over the catalyst containing ACZ was reduced by about a factor of five compared with that containing pure ceria.Toyota Motor Corp.has put three-way catalysts containing first-,second-,and third-generation CZ into practical use globally.
机译：研发出ZrCh含量在5到75摩尔％之间的二氧化铈-氧化锆固溶体（CZ）的创新型三效催化剂，这种催化剂具有很高的储氧/释放氧能力（OSC）。发现ZZ在0-20 mol％ZrO_2范围内随固溶体中溶解的氧化锆量的增加呈线性增长。含第一代CZ的催化剂的热稳定性高于含二氧化铈的催化剂。与第一代CZ相比，OSC是通过均相共沉淀工艺开发的，随后在1000摄氏度以下进行热处理，从而使XRD估计氧化锆溶解到氧化铈中的氧化铈含量高达75 mol％。 （ACZ）是基于“扩散屏障概念”通过均相共沉淀开发的。ACZ的OSC比纯二氧化铈的OSC大23倍。含ACZ的催化剂上的NOx排放降低了约一个事实丰田汽车公司已将含有第一，第二和第三代CZ的三元催化剂在全球范围内投入实际使用。

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