In Situ and Continuous Decoding Hydrogen Generation in Solar Water-Splitting Cells

被引：3

作者：

Li, Linyang ^{[1
]}

Liu, Yang ^{[1
]}

He, Yuanyuan ^{[1
]}

Xie, Quanhua ^{[1
]}

Peng, Xiaoling ^{[1
]}

Wu, Junjun ^{[2
,3
]}

Zhao, Mingfu ^{[1
]}

Karimi-Maleh, Hassan ^{[4
,5
]}

Zhong, Nianbing ^{[1
]}

机构：

[1] Chongqing Univ Technol, Chongqing Key Lab Modern Photoelect Detect Technol, Chongqing Key Lab Opt Fiber Sensor & Photoelect De, Chongqing Engn Res Ctr Intelligent Opt Fiber Sensi, Chongqing 400054, Peoples R China

[2] Chongqing Univ, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400044, Peoples R China

[3] Chongqing Univ, Sch Energy & Power Engn, Chongqing 400044, Peoples R China

[4] Univ Elect Sci & Technol, Sch Resources & Environm, Chengdu 611731, Sichuan, Peoples R China

[5] Chongqing Univ Technol, Sch Elect & Elect Engn, Chongqing 400054, Peoples R China

来源：

ANALYTICAL CHEMISTRY | 2024年 / 96卷 / 29期

基金：

中国国家自然科学基金;

关键词：

ELECTROLYSIS; DIFFUSION;

D O I：

10.1021/acs.analchem.4c02323

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Photoelectrochemical (PEC) water splitting is gaining recognition as an effective method for producing green hydrogen. However, the absence of in situ, continuous decoding hydrogen generation tools hampers a detailed understanding of the physics and chemistry involved in hydrogen generation within PEC systems. In this article, we present a quantitative, spatiotemporally resolved optical sensor employing a fiber Bragg grating (FBG) to probe hydrogen formation and temperature characteristics in the PEC system. Demonstrating this principle, we observed hydrogen formation and temperature changes in a novel cappuccino cell using a BiVO4/TiO2 photoanode and a Cu2O/CuO/TiO2 photocathode. Our findings demonstrate that FBG sensors can probe dynamic hydrogen formation at 0.5 s temporal resolution; these sensors are capable of detecting hydrogen concentrations as low as 0.6 mM. We conducted in situ and continuous monitoring of hydrogen and temperature to ascertain various parameters: the rate of hydrogen production at the photocathode surface, the time to reach hydrogen saturation, the distribution of hydrogen and temperature, and the rate of hydrogen transfer in the electrolyte under both external bias and unbiased voltage conditions. These results contribute valuable insights into the design and optimization of PEC water-splitting devices, advancing the in situ comprehensive monitoring of PEC water-splitting processes.

引用

页码：12155 / 12164

页数：10