Enhancing photoelectrochemical performance of the Bi2MoO6 photoanode by ferroelectric polarization regulation.
Enhancing photoelectrochemical performance of the Bi2MoO6 photoanode by ferroelectric polarization regulation.
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DOI：
10.1039/d0nr02809f
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发表时间：
2020-09
期刊：
影响因子：
6.7
通讯作者：
Zhongshuai Xie;Zongyang Cui;Jiafeng Shi;Cheng Lin;Kan Zhang;G. Yuan;Jun-ming Liu
中科院分区：
文献类型：
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作者：
Zhongshuai Xie;Zongyang Cui;Jiafeng Shi;Cheng Lin;Kan Zhang;G. Yuan;Jun-ming Liu
光电化学分解水提供了一个很有前途的策略，将太阳能转化为化学燃料，并吸引了广泛的兴趣。在此，Bi 2 MoO 6纳米柱具有大的表面积的ITO涂层的玻璃基板上制作和它们的光电化学性能的增强，通过适当的操纵铁电极化。极化方向朝向ITO的Bi 2 MoO 6光阳极在1.23 V（相对于可逆氢电极）下显示出250 μA cm-2的增强的光电流密度，这比没有宏观极化的原始Bi 2 MoO 6纳米柱高28%。相应的退极化电场有利于光激发的电子-空穴对的分离，从而最大限度地减少载流子的复合，进一步提高光电流密度。我们的工作提供了一个新的策略Bi 2 MoO 6基光电化学器件具有巨大的应用潜力，在太阳能转化为化学燃料。
Photoelectrochemical water splitting provides a promising strategy for converting solar energy into chemical fuels and has attracted extensive interest. Herein, Bi2MoO6 nanopillars with large surface areas were fabricated on an ITO-coated glass substrate and their photoelectrochemical properties are enhanced through appropriate manipulation of ferroelectric polarization. The Bi2MoO6 photoanode with polarization orientation toward ITO shows an enhanced photocurrent density of 250 μA cm-2 at 1.23 V vs. reversible hydrogen electrode, which is 28% higher than that of pristine Bi2MoO6 nanopillars without macroscopic polarization. The corresponding depolarization electric field benefits the separation of light-excited electron-hole pairs, thus minimizing the recombination of charge carriers and further enhancing the photocurrent current density. Our work offers a new strategy of Bi2MoO6-based photoelectrochemical devices with great potential of application in the conversion of solar energy into chemical fuels.