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Promoting photocatalytic hydrogen evolution over the perovskite oxide Pr0.5(Ba0.5Sr0.5)0.5Co0.8Fe0.2O3 by plasmon-induced hot electron injection.
Nanoscale ( IF 6.7 ) Pub Date : 2020-08-25 , DOI: 10.1039/c9nr10247g
Zhishan Li 1 , Qimeng Zhang 2 , Jian-Gang Li 1 , Huachuan Sun 1 , Muk-Fung Yuen 3 , Shenglin Jiang 1 , Yang Tian 2 , Guo Hong 4 , Chundong Wang 5 , Meilin Liu 6
Affiliation  

Exploration of highly efficient and stable photocatalysts for water splitting has attracted much attention. However, developing a facile and effective approach to enhance the photocatalytic activity for practical applications is still highly challenging. Herein, we report a newly-fabricated perovskite oxide (Pr0.5(Ba0.5Sr0.5)0.5Co0.8Fe0.2O3) decorated with Au ultrafine nanoparticles for photocatalytic water splitting. An exceptionally high hydrogen evolution rate of 1618 μmol g−1 h−1 was achieved (under 2 h illumination) when the Au mass loading was optimized to 9.3 wt%, which is 540 times higher than that of the pristine one. The splendid photocatalytic activity of the sample was attributed to plasmon-excited hot electron injection from Au to Pr0.5(Ba0.5Sr0.5)0.5Co0.8Fe0.2O3 (PBSCF) under illumination. The finite-difference time-domain simulations (FDTD) demonstrated that the localized strong electric field formed at the interface between Au and PBSCF under illumination, enables the hot electrons to be energetic and make the injection possible.

中文翻译:

等离子体激元诱导的热电子注入促进钙钛矿氧化物Pr0.5(Ba0.5Sr0.5)0.5Co0.8Fe0.2O3上的光催化氢释放。

对用于水分解的高效和稳定的光催化剂的研究引起了广泛的关注。然而,开发一种简便有效的方法来增强实际应用中的光催化活性仍然是极富挑战性的。在此,我们报道了一种新型的钙钛矿氧化物(Pr 0.5(Ba 0.5 Sr 0.50.5 Co 0.8 Fe 0.2 O 3)装饰有Au超细纳米粒子,用于光催化水分解。极高的析氢速率为1618μmolg -1 h -1当Au的质量负载优化到9.3 wt%时(在原始质量条件下的540倍),Au的质量达到了(在2 h光照下)。样品的出色光催化活性归因于在照射下从Au向Pr 0.5(Ba 0.5 Sr 0.50.5 Co 0.8 Fe 0.2 O 3(PBSCF)进行的等离激元激发热电子注入。有限差分时域仿真(FDTD)证明,在光照下在Au和PBSCF之间的界面处形成的局部强电场使热电子具有能量并使注入成为可能。
更新日期:2020-09-24
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