Enhanced light harvesting and electron-hole separation for efficient photocatalytic hydrogen evolution over Cu7S4-enwrapped Cu2O nanocubes

被引：93

作者：

Zhang, Mengmeng ^{[1
]}

Chen, Zelin ^{[1
]}

Wang, Yang ^{[1
]}

Zhang, Jinfeng ^{[1
]}

Zheng, Xuerong ^{[1
]}

Rao, Dewei ^{[2
]}

Han, Xiaopeng ^{[1
]}

Zhong, Cheng ^{[1
]}

Hu, Wenbin ^{[1
]}

Deng, Yida ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Key Lab Adv Ceram & Machining Technol, Minist Educ, Tianjin 300072, Peoples R China

[2] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2019年 / 246卷

基金：

中国国家自然科学基金;

关键词：

Photocatalyst; Hydrogen evolution reaction; Cu2O/Cu7S4; nanocubes; Localized surface plasma resonance; Electron-hole separation; OXYGEN EVOLUTION; CATION-EXCHANGE; H-2; PRODUCTION; WATER; PERFORMANCE; SOLAR; COCATALYST; NANOSHEETS; GRAPHENE; CDS;

D O I：

10.1016/j.apcatb.2019.01.042

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

P-type Cu2O is an advantageous photocatalyst as the appropriate bandgap structure and low-cost. However, poor photocatalytic and instability of such promising material is still a great challenge. Here the core-shell Cu7S4-coated Cu2O nanocubes (Cu2O/Cu7S4 NCs) were successfully synthesized by solution method coupled with anion exchange, and were firstly employed to hydrogen evolution reaction (HER). The resultant integrated structure of Cu2O/Cu7S4 NCs exhibited apparent improved photocatalytic hydrogen evolution activity compared with Cu2O photocatalyst. Particularly, Cu2O/Cu7S4 NCs had a high hydrogen production rate of 1689.00 mu mol g(-1) h(-1) under full spectra irradiation with additive of Na2SO3, which was higher than that of Cu2O NCs with a factor of 1.71 times. Excellent synergistic effect of Cu2O and Cu7S4 can be responsible for the improved hydrogen evolution properties, namely, the presence of Cu7S4 with localized surface plasma resonance (LSPR) can promote the photogenerated electrons transfer from the Cu2O surface, prolong the photogenerated holes lifetime, accelerate the separation of photogenerated electrons and holes, and ameliorate the photoelectric properties of semiconductors. The in situ formed multifunctional Cu7S4 layer offers a promising avenue to design photocathodes rationally for photocatalytic water reduction.

引用

页码：202 / 210

页数：9

共 56 条

[1] Physical Confinement Promoting Formation of Cu2O-Au Heterostructures with Au Nanoparticles Entrapped within Crystalline Cu2O Nanorods [J].