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Recent advances on solar water splitting using hematite nanorod film produced by purpose-built material methods

机译：使用特制材料方法生产的赤铁矿纳米棒薄膜进行太阳能水分解的最新进展

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摘要

Photoelectrochemical cells offer a more elegant, clean, and sustainable way to store solar energy as chemical energy through the splitting of water into its primitive form (H_2 and O_2). Among many metal oxides pointed as candidates for this application, the fundamental characteristics of hematite (α-Fe_2O_3), such as abundance, excellent chemical stability in an aqueous environment, and favorable optical band gap, emerged as a promising photoanode. Although attractive, the poor optoelectronic properties necessitate a large application of overpotential for split water assisted by solar irradiation, limiting the high performance of this material. Since the electrode was built using materials in nanoscale, significant advances were achieved. This review highlights new insights and recent progress in the use of a purpose-built material process to build hematite electrodes for improving photocatalytic activity. In addition, reduction on the required overpotential by effective control-treatment of morphology and surface of vertically aligned hematite nanorods will be addressed. An interesting set of results were also discussed revisiting a novel strategy recently presented in the literature and complementary advances was illustrated. These latest efforts aid in pointing out the challenges or obstacles to be overcome using this morphology and in defining new opportunities.
机译：光电化学电池通过将水分解成原始形式（H_2和O_2），提供了一种更加优雅，清洁和可持续的方式将太阳能存储为化学能。在许多有望用于此应用的金属氧化物中，赤铁矿（α-Fe_2O_3）的基本特征（例如丰度，在水环境中的出色化学稳定性和良好的光学带隙）已成为有希望的光阳极。尽管很诱人，但较差的光电性能需要在通过太阳辐射的辅助下大量应用过分水，限制了这种材料的高性能。由于电极是使用纳米级材料构建的，因此取得了重大进展。这篇综述着重介绍了在使用专用材料工艺制造赤铁矿电极以改善光催化活性方面的新见识和最新进展。另外，将解决通过有效地控制垂直排列的赤铁矿纳米棒的形态和表面来减少所需的超电势。还讨论了一组有趣的结果，以重新审视最近在文献中提出的一种新颖策略，并举例说明了互补的进展。这些最新的努力有助于指出使用这种形态要克服的挑战或障碍，并定义新的机会。

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  • 来源
    《Journal of Materials Research》 |2014年第1期|16-28|共13页
  • 作者

    Waldemir Moura de Carvalho Jr.; Flavio Leandro Souza;

  • 作者单位

    Centro de Ciencias Naturals e Humanas, Universidade Federal do ABC, Santo Andre, Sao Paulo 09210-170, Brazil;

    Centro de Ciencias Naturals e Humanas, Universidade Federal do ABC, Santo Andre, Sao Paulo 09210-170, Brazil;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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