...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >Adipic acid formation from cyclohexanediol using platinum and vanadium catalysts: elucidating the role of homogeneous vanadium species
【24h】

Adipic acid formation from cyclohexanediol using platinum and vanadium catalysts: elucidating the role of homogeneous vanadium species

机译：己二酸形成cyclohexanediol使用铂和钒催化剂:阐明齐次钒物种的角色

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

Vanadium compounds have shown great potential alongside Pt/C for the oxidation of cyclohexanediol to adipic acid. However, the low stability of these materials often leads to ambiguity when considering the homogeneous or heterogeneous nature of the active species. In this article we describe our attempts to synthesise stable vanadium catalysts through the utilisation of vanadium bronze structures. By the addition of sodium, copper or silver into these structures, leaching could be decreased to 5% for AgVO3, compared to 88.4% with V2O5. These reactions were run in aqueous conditions under 3 bar O-2. However, despite significant stabilisation of vanadium in the bronze structures, we show that as little as 7.6 ppm of a homogeneous vanadium species in the reaction solution can cause the selective oxidation of 2-hydroxycyclohexanone to adipic acid. Analysis of the speciation by V-51 NMR and UV-vis has revealed the active species to be in the +5 oxidation state in the form of a decavanadate compound with the presence of small amounts of monovanadate.
机译：钒化合物显示巨大的潜力与Pt / C的氧化cyclohexanediol己二酸。这些材料通常会导致的稳定当考虑齐次或模棱两可异构活性物种的性质。本文中,我们描述我们的企图合成稳定钒催化剂通过利用钒铜结构。添加钠、铜或银到这些结构、浸出可能会下降到5%以V2O5 AgVO3,而88.4%。反应是在水运行条件3酒吧坐坐。稳定的钒铜结构,我们表明,7.6 ppm一个齐次钒物种的反应解决方案可能导致选择性氧化2-hydroxycyclohexanone己二酸。物种形成的V-51 NMR和紫外可见揭示了活跃的物种在+ 5氧化态的形式decavanadate化合物和少量的存在

著录项

相似文献

  • 外文文献
  • 中文文献
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