...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >High-Yield and Selective Photoelectrocatalytic Reduction of CO_2 to Formate by Metallic Copper Decorated Co_3O_4 Nanotube Arrays
【24h】

High-Yield and Selective Photoelectrocatalytic Reduction of CO_2 to Formate by Metallic Copper Decorated Co_3O_4 Nanotube Arrays

机译：金属铜修饰的Co_3O_4纳米管阵列的高选择性光电催化还原CO_2生成甲酸酯

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

Carbon dioxide (CO_2) reduction to useful chemicals is of great significance to global climate and energy supply. In this study, CO_2 has been photoelectrocatalytically reduced to formate at metallic Cu nanoparticles (Cu NPs) decorated Co_3O_4 nanotube arrays (NTs) with high yield and high selectivity of nearly 100%. Noticeably, up to 6.75 mmol·L~(-1)·cm~(-2) of formate was produced in an 8 h photoelectrochemical process, representing one of the highest yields among those in the literature. The results of scanning electron microscopy, transmission electron microscopy and photoelectrochemical characterization demonstrated that the enhanced production of formate was attributable to the self-supported Co_3O_4 NTs/Co structure and the interface band structure of Co_3O_4 NTs and metallic Cu NPs. Furthermore, a possible two-electron reduction mechanism on the selective PEC CO_2 reduction to formate at the Cu-Co_3O_4 NTs was explored. The first electron reduction intermediate, CO_(2ads)~(·-), was adsorbed on Cu in the form of Cu-O. With the carbon atom suspended in solution, CO_(2ads)~(·-) is readily protonated to form the HCOO~- radical. And HCOO~- as a product rapidly desorbs from the copper surface with a second electron transfer to the adsorbed species.
机译：将二氧化碳（CO_2）还原为有用的化学物质对全球气候和能源供应具有重要意义。在这项研究中，CO_2被光电催化还原成金属铜纳米颗粒（Cu NPs）装饰的Co_3O_4纳米管阵列（NTs）的甲酸酯，具有高收率和接近100％的高选择性。值得注意的是，在8小时的光电化学过程中，生成的甲酸盐高达6.75mmol·L〜（-1）·cm〜（-2），是文献中收率最高的一种。扫描电子显微镜，透射电子显微镜和光电化学表征的结果表明，甲酸盐产量的提高归因于自支撑的Co_3O_4 NTs / Co结构以及Co_3O_4 NTs与金属Cu NPs的界面能带结构。此外，探索了在Cu-Co_3O_4 NTs上选择性PEC CO_2还原生成甲酸酯的可能的两电子还原机理。第一电子还原中间体CO_（2ads）〜（·-）以Cu-O的形式吸附在Cu上。通过将碳原子悬浮在溶液中，CO_（2ads）〜（·-）易于质子化以形成HCOO〜-自由基。并且作为产物的HCOO-从铜表面迅速解吸，并且第二次电子转移到被吸附的物质上。

著录项

  • 来源
    《Environmental Science & Technology》 |2015年第9期|5828-5835|共8页
  • 作者

    Qi Shen; Zuofeng Chen; Xiaofeng Huang; Meichuan Liu; Guohua Zhao;

  • 作者单位

    Department of Chemistry, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China;

    Department of Chemistry, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China;

    Department of Chemistry, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China;

    Department of Chemistry, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China;

    Department of Chemistry, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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