An in-situ transient photo-induced voltage method to understand the PEC efficiency of C, N co-doped TiO2 photoanode

被引:11
作者
Han, Yidong [1 ]
Wang, Jiaxuan [1 ]
Wang, Xiting [1 ]
Wu, Zhenyu [1 ]
Zhao, Yu [2 ]
Huang, Hui [1 ]
Liu, Yang [1 ]
Kang, Zhenhui [1 ,3 ]
机构
[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, 199 Renai Rd, Suzhou 215123, Jiangsu, Peoples R China
[2] Suzhou Inst Trade & Commerce, Dept Informat Technol, 287 Xuefu Rd, Suzhou 215009, Jiangsu, Peoples R China
[3] Macau Univ Sci & Technol, Macao Inst Mat Sci & Engn MIMSE, MUST SUDA Joint Res Ctr Adv Funct Mat, Taipa 999078, Macao, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
TiO2; photoanode; C N co-doping; Photoelectrochemical activities; In-situ transient photoinduced voltage; PEC efficiency; OXYNITRIDE TAON PHOTOANODE; ENHANCED CHARGE SEPARATION; BIVO4; PHOTOANODES; WATER; HYDROGEN; CARBON; OXIDE; PERFORMANCE; INTERFACE; NANOPARTICLES;
D O I
10.1016/j.apsusc.2022.155282
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
Photoelectrocatalysis (PEC) is one of the most important green energy conversion technologies. During the development of PEC, the Jabs, eta sep and eta inj are challenges that hinder the performance enhancement of different kinds of photoanodes in PEC systems. As a stable, cheap and non-toxic PEC material, TiO2 is also limited by the above challenges. Here, a series of C, N co-doped TiO2 photoanodes were synthesized by hydrothermal method combined with a simple one-step thermal diffusion treatment. Under AM 1.5 G light intensity, the PEC perfor-mance of TCN-1.5 is 4.06 mA cm-2 at 1.23 V vs RHE in 1.0 M NaOH, which is ca. 2.08 times as high as the photocurrent density of the pristine TiO2. Especially, an in-situ transient photoinduced voltage (TPV) method was developed to measure the changes on efficiencies mentioned above: Jabs, eta sep and eta inj are improved by about 9.8 %, 24.9 % and 48.3 %, respectively, and their product is equal to the increase of photocurrent density. This work analyzes the improvement of efficiencies in the PEC process through in-situ characterization and opens up a new way for PEC material design and fabrication.
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页数:10
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