A carbon dot based metal-free photoelectrochemical cell using O2/H2O redox couple in real seawater

被引：3
|
作者：
Chen, Zhaomin [1 ]
Wu, Zhenyu [1 ]
Xu, Jia [1 ]
Zhao, Rui [1 ]
Han, Xiaoxia [1 ]
Jiang, Jiwei [1 ]
Shao, Mingwang [1 ]
Dong, Bin [1 ]
Kang, Zhenhui [1 ,2 ]
机构：
[1] Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat Lab FUNSOM, Suzhou 215123, Peoples R China
[2] Macau Univ Sci & Technol, MUST SUDA Joint Res Ctr Adv Funct Mat, Macao Inst Mat Sci & Engn MIMSE, Taipa 999078, Macao, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2022年 / 319卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Carbon dots; O-2/H2O redox couples; Electron/proton transfer; Photo-charging; ACTIVE-SITES; ENERGY-STORAGE; G-C3N4; REDUCTION; BATTERIES; EFFICIENT;
D O I：
10.1016/j.apcatb.2022.121914
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：
Photochemical devices show great potential in applications ranging from electrical energy storage to future smart grids. Here, we report a metal-free composite film cell based on carbon dots (CDots) and polyaniline (PANI), which could achieve 24/7 discharge and photo-charging in seawater. CDots/PANI film cell has an open-circuit-voltage (OCV) of 0.95 V, a maximum power density of 380 mW m(2), and the ability to discharge continuously for 40 h under solar irradiation of AM 1.5 G. It couples the reduction reaction of PANI, and the CDot-catalyzed oxygen reduction reactions (ORR) during discharge. While the light-induced CDot-catalyzed oxygen evolution reaction (OER) and the reduction reaction of PANI during charging. In particular, in-situ TPV tests were used to verify the effect of the light-induced OER and the kinetic properties of the catalyst on the charge transfer at the interface. We believe this research may provide new ideas for sustainable energy conversion and storage.
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页数：8
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