• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >p-Si/SnO2/Fe2O3 Core/Shell/Shell Nanowire Photocathodes for Neutral pH Water Splitting
【24h】

p-Si/SnO2/Fe2O3 Core/Shell/Shell Nanowire Photocathodes for Neutral pH Water Splitting

机译：用于中性pH水分解的p-Si / SnO2 / Fe2O3核/壳/壳纳米线光电阴极

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

Silicon is one of the promising materials for solar water splitting and hydrogen production; however, it suffers from two key factors, including the large external potential required to drive water splitting reactions at its surface and its instability in the electrolyte. In this study, a successful fabrication of novel p-Si-SnO2-Fe2O3 core/shell/shell nanowire (css-NW) arrays, consisting of vertical Si NW cores coated with a thin SnO2 layer and a dense Fe2O3 nanocrystals (NCs) shell, and their application for significantly enhanced solar water reduction in a neutral medium is reported. The p-Si-SnO2 -Fe2O3 css-NW structure is characterized in detail using scanning, transmission, and scanning transmission electron microscopes. The p-Si-SnO2 -Fe2O3 css-NWs show considerably improved photocathodic performances, including higher photocurrent and lower photocathodic turn-on potential, compared to the bare p-Si NWs or p-Si-SnO2 core/shell NWs (cs-NWs), due to increased optical absorption, enhanced charge separation, and improved gas evolution. As a result, photoactivity at 0 V versus reversible hydrogen electrode and a low onset potential in the neutral solution are achieved. Moreover, p-Si-SnO2 -Fe2O3 css-NWs exhibit long-term photoelectrochemical stability due to the Fe2O3 NCs shell well protection. These results reveal promising css-NW photoelectrodes from cost-effective materials by facile fabrication with simultaneously improved photocathodic performance and stability.
机译：硅是用于太阳能水分解和制氢的有前途的材料之一。然而，它具有两个关键因素，包括驱动表面水分解反应所需的巨大外部电势和其在电解质中的不稳定性。在这项研究中，成功​​制造了新型p-Si / n-SnO2 / n-Fe2O3核/壳/壳纳米线（css-NW）阵列，该阵列由垂直的Si NW核组成，该核包覆有薄的SnO2层和致密的Fe2O3纳米晶体（NCs）外壳及其在中性介质中显着增强太阳能减水的应用。使用扫描，透射和扫描透射电子显微镜对p-Si / n-SnO2 / n-Fe2O3 css-NW结构进行了详细表征。与裸露的p-Si NWs或p-Si / n-SnO2芯/壳NW（cs-NWs），由于增加了光吸收，增强了电荷分离并改善了气体逸出。结果，实现了相对于可逆氢电极在0 V下的光活性和在中性溶液中的低起始电位。此外，由于Fe2O3 NCs的外壳良好保护，p-Si / n-SnO2 / n-Fe2O3 css-NWs具有长期的光电化学稳定性。这些结果表明，通过低成本制造，具有成本效益的材料，css-NW光电电极易于制造，同时具有改善的光阴极性能和稳定性。

著录项

  • 来源
    《Advanced Functional Materials》 |2015年第17期|2609-2615|共7页
  • 作者

    Kargar Alireza; Kim Sung Joo; Allameh Paniz; Choi Chulmin; Park Namseok; Jeong Huisu; Pak Yusin; Jung Gun Young; Pan Xiaoqing; Wang Deli; Jin Sungho;

  • 作者单位

    Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA;

    Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA;

    Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093 USA|Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA;

    GIST, Sch Mat Sci & Engn, Gwangju 500712, South Korea;

    GIST, Sch Mat Sci & Engn, Gwangju 500712, South Korea;

    GIST, Sch Mat Sci & Engn, Gwangju 500712, South Korea;

    Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA;

    Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA|Univ Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093 USA|Univ Calif San Diego, QI, La Jolla, CA 92093 USA;

    Univ Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093 USA|Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA;

  • 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