Shi Li, Wang Ye, Yan Yingkui, Liu Fei, Huang Zongyu, Ren Xiaohui, Zhang Hongwei, Li Yanshuo, Ye Jinhua
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, PR China.
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, PR China.
J Colloid Interface Sci. 2022 Dec;627:969-977. doi: 10.1016/j.jcis.2022.07.097. Epub 2022 Jul 20.
As an emerging post-graphene two-dimensional material, black phosphorus (BP) has attracted enormous interest as a promising cocatalyst for photocatalytic hydrogen (H) evolution, however, the activity of either pristine bulk or BP nanosheets is far from satisfactory. Herein, we present an effective strategy to greatly boost the H evolution performance of BP via applying the synergistic effect of heterojunction and interfacial lattice strain. A multilayered heterostructure coupling BP nanosheets and nickel oxide (NiO) nanosheets with abundant interface P-Ni and PO bonds is synthesized and utilized as a proof-of-concept material for our design. Both the experimental and theoretical results have revealed that the strain is formed in BP-NiO multilayered heterostructure. The generated lattice strain induces the charge redistribution at the interface between BP and NiO, which leads to the improved electron transfer efficiency and favorable H* adsorption kinetics for photocatalytic H evolution reaction. As a result, the BP-NiO heterostructure with strain effect exhibits much enhanced photocatalytic H evolution activity in the presence of Eosin Y (EY) as photosensitizer, exceeding that of zero-strained BP/NiO heterostructure and many other reported noble-metal-free cocatalyst.
作为一种新兴的后石墨烯二维材料，黑磷（BP）作为光催化析氢的一种有前景的助催化剂引起了极大的关注，然而，原始块状黑磷或黑磷纳米片的活性都远不能令人满意。在此，我们提出了一种有效的策略，通过应用异质结和界面晶格应变的协同效应来极大地提高黑磷的析氢性能。合成了一种多层异质结构，将黑磷纳米片与具有丰富界面P-Ni和PO键的氧化镍（NiO）纳米片耦合，并用作我们设计的概念验证材料。实验和理论结果均表明，在BP-NiO多层异质结构中形成了应变。产生的晶格应变导致BP和NiO之间界面处的电荷重新分布，这导致光催化析氢反应的电子转移效率提高和有利的H*吸附动力学。结果，具有应变效应的BP-NiO异质结构在作为光敏剂的曙红Y（EY）存在下表现出大大增强的光催化析氢活性，超过了零应变BP/NiO异质结构和许多其他报道的无贵金属助催化剂。
