Black Phosphorus/Platinum Heterostructure: A Highly Efficient Photocatalyst for Solar-Driven Chemical Reactions
Black Phosphorus/Platinum Heterostructure: A Highly Efficient Photocatalyst for Solar-Driven Chemical Reactions
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DOI：
10.1002/adma.201803641
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发表时间：
2018-10-04
影响因子：
29.4
通讯作者：
Yu, Xue-Feng
中科院分区：
文献类型：
--
作者：
Bai, Licheng;Wang, Xin;Yu, Xue-Feng
二维黑磷/铂异质结构 (Pt/BP) 被开发为一种用于太阳能驱动化学反应的高效光催化剂。该异质结构是通过沉积具有超小（约1.1 nm）Pt纳米颗粒的BP纳米片而合成的，具有很强的Pt-P相互作用和优异的稳定性。 Pt/BP异质结构表现出明显的P型半导体特性和有效吸收延伸至红外区域的太阳能。此外，在光照射期间，从 Pt/BP 中观察到加速的电荷分离，如飞秒泵浦探针显微光学系统检测到的超快电子迁移（0.11 ps）以及原位 X 射线光电子能谱揭示的 Pt 上的有效电子积累所证明。这些独特的性质使得Pt/BP在模拟太阳光照射下的典型加氢和氧化反应中表现出卓越的性能，其效率远高于其他常见的Pt催化剂，甚至远优于传统的热催化。二维 Pt/BP 异质结构在涉及太阳光的光化学反应中具有巨大潜力，这项研究的结果为下一代高效光催化剂的设计提供了见解。
A 2D black phosphorus/platinum heterostructure (Pt/BP) is developed as a highly efficient photocatalyst for solar-driven chemical reactions. The heterostructure, synthesized by depositing BP nanosheets with ultrasmall (approximate to 1.1 nm) Pt nanoparticles, shows strong Pt-P interactions and excellent stability. The Pt/BP heterostructure exhibits obvious P-type semiconducting characteristics and efficient absorption of solar energy extending into the infrared region. Furthermore, during light illumination, accelerated charge separation is observed from Pt/BP as manifested by the ultrafast electron migration (0.11 ps) detected by a femtosecond pump-probe microscopic optical system as well as efficient electron accumulation on Pt revealed by in situ X-ray photoelectron spectroscopy. These unique properties result in remarkable performance of Pt/BP in typical hydrogenation and oxidation reactions under simulated solar light illumination, and its efficiency is much higher than that of other common Pt catalysts and even much superior to that of conventional thermal catalysis. The 2D Pt/BP heterostructure has enormous potential in photochemical reactions involving solar light and the results of this study provide insights into the design of next-generation high-efficiency photocatalysts.