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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Influence of controlled Pd nanoparticles decorated TiO2 nanowire arrays for efficient photoelectrochemical water splitting
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Influence of controlled Pd nanoparticles decorated TiO2 nanowire arrays for efficient photoelectrochemical water splitting

机译：受控PD纳米颗粒的影响装饰TiO2纳米线阵列高效光电化学水分解

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摘要

This work depicts the synthesis of controllable Pd nanoparticles decorated TiO2 nanowire arrays by electrospray technique. By varying the substrate temperature and volume of precursor solution, Pd/TiO2 hybrid structure with different sizes and deposition yield was precisely controlled. The highest photocurrent density of the Pd/TiO2 photoanode was 1.4 mA cm(-2) at 1.23 V vs. RHE, which was approximately 5 times higher than the pristine TiO2. The onset potential with a significant cathodic shift of 80 mV compared to the pristine TiO2 was also observed. To the best of our knowledge, the obtained photocurrent showed the optimal photocurrent density and high stability compared with previous reports. It is also found that the photoelectrochemical performance is closely related to the size and deposition quantity of Pd nanoparticles. According to the results, the enhanced PEC performance can be attributed to the Schottky junction, charge transfer and the enhancement about the separation efficiency of the photogenerated electrons and holes betweenTiO(2) and Pd NPs. This result demonstrated that this method may design a new and green strategy for synthesizing the well-defined morphologies, compositions, and sizes of the hybrid nanomaterial for photocatalytic hydrogen generation, photocatalytic CO2 reduction and photosynthesis of organic molecules. (C) 2019 Elsevier B.V. All rights reserved.
机译：该作品描绘了通过电喷雾技术的可控PD纳米粒子的合成装饰了TiO2纳米线阵列。通过改变前体溶液的衬底温度和体积，精确地控制具有不同尺寸和沉积产量的Pd / TiO2杂化结构。 Pd / TiO2光电的最高光电流密度为1.4mAcm（-2），1.23V与rhe，其比原始TiO 2高约5倍。还观察到与原始TiO 2相比，具有80mV的显着阴极偏移的发病电位。据我们所知，所获得的光电流显示与先前的报道相比最佳的光电流密度和高稳定性。还发现光电化学性能与Pd纳米颗粒的尺寸和沉积量密切相关。根据结果​​，增强的PEC性能可以归因于肖特基结，电荷转移和关于光生电子和孔的分离效率的增强（2）和PD NPS。该结果表明，该方法可以设计一种新的和绿色策略，用于合成杂化纳米材料的明确定义的形态，组合物和用于光催化氢气产生，光催化二氧化碳还原和有机分子光合作用的含量。 （c）2019 Elsevier B.v.保留所有权利。

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