IR-Driven strong plasmonic-coupling on Ag nanorices/W18O49 nanowires heterostructures for photo/thermal synergistic enhancement of H2 evolution from ammonia borane

被引：192

作者：

Liu, Yang ^{[1
]}

Zhang, Zhenyi ^{[1
]}

Fang, Yurui ^{[2
]}

Liu, Benkang ^{[1
]}

Huang, Jindou ^{[1
]}

Miao, Fujun ^{[3
]}

Bao, Yanan ^{[1
]}

Dong, Bin ^{[1
]}

机构：

[1] Dalian Nationalities Univ, Key Lab New Energy & Rare Earth Resource Utilizat, Key Lab Photosensit Mat & Devices Liaoning Prov, State Ethn Affairs Commiss,Sch Phys & Mat Engn, 18 Liaohe West Rd, Dalian 116600, Peoples R China

[2] Dalian Univ Technol, Sch Phys, Minist Educ, Key Lab Mat Modificat Laser Electron & Ion Beams, Dalian 116024, Peoples R China

[3] Zhengzhou Univ, Sch Mat Sci & Engn, 100 Kexue Ave, Zhengzhou 45001, Henan, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2019年 / 252卷

基金：

中国国家自然科学基金;

关键词：

Plasmonic coupling; Photo/thermal catalytsis; H-2; evolution; W18O49; nanowires; Ag nanorices; NOBLE-METAL-FREE; HOT-ELECTRON TRANSFER; HYDROGEN GENERATION; HYDROLYTIC DEHYDROGENATION; CHARGE SEPARATION; GRAPHENE OXIDE; NANOPARTICLES; CATALYST; CONVERSION; RESONANCE;

D O I：

10.1016/j.apcatb.2019.04.035

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：

Plasmonic coupling between two or more metal nanostructures has attracted significant interest, since this fascinating near-field interaction is more effective for the aggregation/magnification of the incident light intensity compared to normal surface-plasmon-resonance (SPR) of single nanostructures. Herein, we report, for the first time, an IR-driven strong plasmonic coupling in an unusual metal/non-metal heterostructure system. This system is fabricated through random assemblage of Ag nanorices (NRs) onto W18O49 nanowires (NWs) film with F-doped SnO2 glass as substrate. Through the 3D-finite element simulation, we demonstrate that the plasmonic coupling between Ag NRs and W18O49 NWs significantly enhances the localized electric fields at the "hot spots". This achieved magnitudes of 10(1)-10(4) times of that of incident light, thus leading to the promoted generation of plasmonic "hot-electrons". Moreover, the resonance excitation of plasmonic coupling on the heterostructures not only induces ultrafast electron transfer from W18O49 to Ag hetero-components, but also the photothermal effect to increase the localized temperature. Upon SPR-coupling excitation, the Ag/W18O49 heterostructures film exhibits a remarkable enhancement of the photo/thermal catalytic activity for H-2 evolution from ammonia borane compared to that of either the Ag NRs ((similar to)8.2 x) or W18O49 NWs ((similar to)9.0 x) films. Notably, we observed an obvious H-2 evolution over the Ag/W18O49 heterostructures film under natural sunlight irradiation.

引用

页码：164 / 173

页数：10