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首页> 外文期刊>Catalysis science & technology >Phosphating 2D CoAl LDH anchored on 3D self-assembled NiTiO3 hollow rods for efficient hydrogen evolution
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Phosphating 2D CoAl LDH anchored on 3D self-assembled NiTiO3 hollow rods for efficient hydrogen evolution

机译：磷化2 d煤炭LDH固定在3 d自组装NiTiO3中空棒为有效氢进化

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摘要

Two photo-active materials with opposite surface potentials, NiTiO3 with a negative potential and CoAl LDH with a positive potential, have been rationally integrated into two-dimensional (2D) active plane phosphated-CoAl LDH with rich active sites and three-dimensional (3D) hollow NiTiO3 rods with more negative zeta potential. The delicate architecture can efficiently accelerate the separation and migration of photo-excited electrons, make the surface potential more negative, enhance thermodynamic H-2 evolution reaction, and offer rich active planes for photo-catalytic redox reactions. Based on these highlighted photo-catalytic benefits, the optimal composite exhibits more prominent photo-catalytic hydrogen evolution performance compared with NiTiO3 or CoAl LDH materials alone under visible irradiation. In detail, the stereoscopic catalyst, constructed by phosphating CoAl LDH layers anchored on NiTiO3 hollow rods, exhibits a hydrogen evolution activity of about 594 mu mol 5 h(-1), which is 11.6 times and 14.8 times that of CoAl LDH (51 mu mol 5 h(-1)) and NiTiO3 (40 mu mol 5 h(-1)) alone, respectively. Also, the density functional theory results reveal the good conductivity, which is beneficial for charge migration in the hybrid sample. The results from the thoroughly conducted characterization studies such as TEM, SEM, XPS, XRD, UV-vis DRS, transient photocurrent, and FTIR spectroscopy have been well researched and they are in good agreement with each other.
机译：两个相反photo-active材料表面势,NiTiO3负电位煤炭LDH与积极的潜力,合理整合到二维(2 d)活跃的平面phosphated-CoAl LDH具有丰富活跃网站和三维(3 d)空心NiTiO3棒-电动电势。精致的建筑可以有效地加速photo-excited的分离和迁移电子,使表面势更负,提高热力学2进化反应,并提供丰富的活跃的飞机photo-catalytic氧化还原反应。强调photo-catalytic好处,最优综合展览photo-catalytic更加突出氢进化性能相比NiTiO3或煤炭LDH材料单独下可见辐照。催化剂,由煤炭LDH磷化层固定在NiTiO3中空棒,展品氢进化活动约594亩摩尔5h(1)的11.6倍和14.8倍煤炭LDH(51亩摩尔5 h(1))和NiTiO3(40亩摩尔仅5 h(1)),分别。密度泛函理论揭示了好结果导电率,有利于电荷迁移的混合样品。彻底地进行了表征研究如TEM、SEM、XPS、XRD、紫外可见DRS,瞬态光电流和红外光谱研究和他们有很好的一致性彼此。

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