...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy & environmental science >Highly durable photoelectrochemical H_2O_2 production via dual photoanode and cathode processes under solar simulating and external bias-free conditions
【24h】

Highly durable photoelectrochemical H_2O_2 production via dual photoanode and cathode processes under solar simulating and external bias-free conditions

机译：高度耐用的光电化学H_2O_2通过双光电码和阴极工艺在太阳模拟和外部偏差条件下生产

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 study demonstrated efficient solar-to-H(2)O(2)conversion through a photoelectrochemical (PEC) cell that maximizes the utilization of solar energy by having double side generation of H(2)O(2)on both the photoanode and cathode. This work was accomplished by preparing (i) efficient BiVO4(BVO) photoanodes modified with various metal dopants (Mo, W, or Cr), (ii) surface-treatment with phosphate on the as-synthesized photoanodes, and (iii) single-walled carbon nanotube (CNT) electrodes with anchored anthraquinone (AQ-CNT), a reversible H2O2-evolving catalyst that has been widely used in the H(2)O(2)production industry. The introduction of Mo into BVO and surface phosphate treatment on BVO (P-Mo-BVO) enhanced the faradaic efficiency (FE) of H(2)O(2)production from water oxidation and slowed the H(2)O(2)decomposition kinetics with achieving highly durable PEC reactions over 100 h (90% photocurrent remained), while bare Mo-BVO experienced the rapid decline of the photocurrent during irradiation with the dissolution of BiVO4. The utilization of AQ on the cathode made the H(2)O(2)production by oxygen reduction highly selective and suppressed competing H(2)production completely. Consequently, the optimized configuration of a BVO photoanode modified with Mo (10 atom%) and phosphate and an AQ-CNT cathode enabled H(2)O(2)production on both electrodes, yielding H(2)O(2)production with FE values of 40-50% and similar to 100%, respectively, across a broad range of potentials (0.75 to 2 V-RHE) and a net H(2)O(2)production rate of 0.66 mu mol min(-1)cm(-2)at 1.0 V-RHE. This dual electrode system also successfully demonstrated H(2)O(2)production under an external bias-free condition with a net H(2)O(2)production rate of 0.16 mu mol min(-1)cm(-2)and FE value of similar to 43% and similar to 100% for photoanodic and cathodic production, respectively. To the best of our knowledge, this is the most durable PEC system for H(2)O(2)production obtained using a BiVO4-based photoanode that enabled the simultaneous photoanodic and cathodic production of H2O2.
机译：本研究证明了通过光电化学（PEC）细胞的高效太阳能 - H（2）（2）转化，通过在光电码和光处理中具有双副作产生H（2）O（2），最大化太阳能的利用阴极。这项工作是通过制备（i）用各种金属掺杂剂（Mo，W或Cr），（ii）用磷酸盐的表面处理来实现的（i）高效的Bivo4（BVO）光锅来实现，并在合成光阳极上用磷酸盐和（iii）单一 - 围墙碳纳米管（CNT）电极具有锚定的蒽醌（AQ-CNT），可逆的H2O2演化催化剂，其已广泛用于H（2）O（2）生产行业。将Mo进入BVO和表面磷酸盐处理对BVO（P-MO-BVO）的磷酸盐处理，增强了H（2）O（2）生产的游览效率（Fe），从水氧化中产生，减慢了H（2）O（2）分解动力学具有超过100小时的高度耐用的PEC反应（剩余90％的光电流），而裸MO-BVO在与BiVo4的溶解中照射期间的光电流的快速下降。在阴极上的水平的利用使H（2）O（2）通过氧还原产生高度选择性和抑制竞争H（2）生产。因此，用Mo（10原子％）和磷酸盐和磷酸盐改性的BVO光阳极的优化配置，并且在两个电极上得到H（2）O（2）产生的H（2）O（2）产生，产生H（2）O（2）产生Fe值分别为40-50％且相当于100％，横跨各种电位（0.75至2 V-rhe）和净H（2）O（2）生产率为0.66μmmmin（-1 ）Cm（-2）在1.0V-rhe。该双电极系统还在外部偏见条件下成功地证明了H（2）O（2）生产，净值H（2）O（2）生产率为0.16μmmin（-1）cm（-2）与FE值相似的43％，相似于光处理和阴极生产的100％。据我们所知，这是使用基于BIVO4的光电码获得的H（2）O（2）生产的最耐用的PEC系统，该光电极能够使H2O2的同时的光阳极和阴极生产。

著录项

  • 来源
    《Energy & environmental science》 |2020年第6期|1730-1742|共13页
  • 作者

    Jeon Tae Hwa; Kim Hyejin; Kim Hyoung-il; Choi Wonyong;

  • 作者单位

    Pohang Univ Sci & Technol POSTECH Div Environm Sci & Engn Pohang 37673 South Korea;

    Pohang Univ Sci & Technol POSTECH Div Environm Sci & Engn Pohang 37673 South Korea;

    Yonsei Univ Dept Civil & Environm Engn Seoul 03722 South Korea|Pohang Univ Sci & Technol POSTECH Future City Open Innovat Ctr Pohang 37673 South Korea;

    Pohang Univ Sci & Technol POSTECH Div Environm Sci & Engn Pohang 37673 South Korea|Yonsei Univ Inst Convergence Res & Educ Adv Technol Seoul 03722 South Korea;

  • 收录信息
  • 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