Article
Engineering, Environmental
Hang Liu, Xiaoli Fan, Yan Li, Hu Guo, Wei Jiang, Guigao Liu
Summary: This paper reviews the synthesis methods and modification strategies of & alpha;-Fe2O3 in photoelectrochemical (PEC) water splitting, focusing on nanostructure design, element doping, co-catalyst modification, heterostructure construction, etc. The challenges and opportunities of this promising material are also discussed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Chengyu Ji, Jiamin Xu, Qianfan Jiang, Gwilherm Kerherve, Haochen Zhou, Xiaoru Li, Sixing Tang, Pankaj Sharma, D. Jason Riley, Fang Xie
Summary: Hematite is a promising catalyst for photoelectrochemical water splitting due to its stability, abundance, and low cost. However, the slow water oxidation kinetics and poor charge transportation have limited its practical application. To address these issues, a three-component heterojunction photoelectrode was designed by incorporating a visible light responsive metal-organic framework (MOF) and optimized plasmonic Ag nanorods into hematite nanostructures. The incorporation of MOF and Ag nanorods resulted in improved light harvesting and enhanced charge transport, leading to superior performance for hematite-based photoelectrochemical water oxidation.
MATERIALS TODAY ADVANCES
(2023)
Review
Chemistry, Applied
Dinghua Zhou, Ke Fan
Summary: This review discusses recent advances in studies on hematite photoanodes for water splitting, and summarizes strategies for improving hematite PEC performance by enhancing photon absorption efficiency, semiconductor bulk separation efficiency, and surface injection efficiency.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Mauricio A. Melo, Igor M. Brito, Joao V. S. B. Mello, Pamela S. M. Rocha, Isabela A. A. Bessa, Braulio S. Archanjo, Fabio S. Miranda, Ricardo J. Cassella, Celia M. Ronconi
Summary: Producing solar fuels through semiconductor-based photocatalytic water splitting is a promising solution for global adoption of renewable energy sources. This study introduces a simple method for preparing nanostructured hematite and niobium-doped hematite nanoparticles, which can be assembled into thin films for use as photoanodes in photoelectrochemical cells. The optimization of film composition and thickness significantly improves the photocurrent and enhances the efficiency of water splitting, making these materials more economically competitive.
Article
Chemistry, Applied
Palyam Subramanyam, Bhagatram Meena, Duvvuri Suryakala, Melepurath Deepa, Challapalli Subrahmanyam
Summary: The plasmonic Bi nanoparticles supported over a g-C3N4/Bi2S3 photoanode showed a high photo-current density and superior solar to hydrogen efficiency, proving to be an alternative to noble metal based photo-electrodes for solar-water splitting reactions.
Article
Green & Sustainable Science & Technology
Jyoti Yadav, Parul Raturi, Sarjana Yadav, J. P. Singh
Summary: This study reports the synthesis of Ag2S nanostructures with zig-zag geometry to enhance the efficiency of water splitting reaction, leading to improved photocurrent density. Theoretical simulations were performed to understand the light absorption mechanism.
Article
Chemistry, Multidisciplinary
Tianying Liu, Wei Li, David Z. Wang, Tongtong Luo, Muchun Fei, Dongyoon Shin, Matthias M. Waegele, Dunwei Wang
Summary: Solar water oxidation is a crucial step in artificial photosynthesis, and its success relies on the accumulation of charges at the active site. Little is known about the impact of catalyst density on the reaction rate. This study investigates the interplay between catalyst density and surface hole concentration and reveals the unexpected benefits of low-density catalyst loading in facilitating forward charge transfer.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Electrical & Electronic
Kuan-Yi Lee, Kong-Wei Cheng
Summary: Orthorhombic Ag8SnS6/ZnO nanorods were successfully synthesized and applied for photoelectrochemical salt-water splitting with high activity and stability, achieving a maximum photocurrent density of 0.79 mA/cm(-2) at 1.5 V bias vs. Ag/AgCl electrode in 0.5 M NaCl solution, with the ability to maintain activity for at least 2000 seconds. The crystal phases and energy band gap values of the samples varied with the [Ag]/[Ag + Sn] molar ratio in the reaction solution.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Haiqing Ma, Jun Beom Hwang, Weon Sik Chae, Hee Suk Chung, Sun Hee Choi, Mahadeo A. Mahadik, Hyun Hwi Lee, Jum Suk Jang
Summary: This paper explores a method of surface modification and doping of hematite nanorods using sputtering, which has led to improved performance of photoanodes. By controlling the sputtering time, the loading of Zr onto FeOOH NRs was effectively managed. The study demonstrates that combining Zr sputtering with high-temperature quenching allows for controlled Zr doping in Fe2O3 NRs.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Chenyu Zhou, Lihua Zhang, Xiao Tong, Mingzhao Liu
Summary: The study found that the PEC activity of water splitting is enhanced at higher electrolyte temperatures due to the role of thermal energy in improving charge carrier transport in BiVO4. Additionally, irreversible surface reconstruction was observed at elevated temperatures in the presence of hole scavengers.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Zijun Sun, Chengwen Xu, Zhen Li, Fei Guo, Baosheng Liu, Jinghua Liu, Jin Zhou, Zhiqiang Yu, Xiong He, Daochuan Jiang
Summary: The efficiency of photoanodes is a key factor in photoelectrochemical water splitting, and it is important to develop low-cost and efficient photoanode materials. In this study, a novel molecular cocatalyst, low-cost metal phthalocyanine complexes (MPcs), was used to modify the BVO surface and create a highly efficient organic-inorganic hybrid photoanode. The results showed that the modified photoanode exhibited significantly improved performance in terms of charge carrier migration and water oxidation kinetics, providing a new route for the design of low-cost, highly efficient photoelectrochemical devices.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Zhenzi Li, Jiaxing Wu, Lijun Liao, Xiangyi He, Baoxia Huang, Shiyu Zhang, Yuxiu Wei, Shijie Wang, Wei Zhou
Summary: The study utilizes surface defect engineering to enhance the photoelectrochemical activity of γ-Fe2O3 nanorod photoanodes. The as-prepared one-dimensional defective nanorods show superior visible-light absorption capacity and excellent photoelectrochemical performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jun Beom Hwang, Periyasamy Anushkkaran, Weon-Sik Chae, Sun Hee Choi, Hyun Hwi Lee, Jum Suk Jang
Summary: In this study, a Fe2O3 photoanode was designed and constructed by sequential in-situ and ex-situ doping to effectively improve the photoelectrochemical water splitting activity. The in-situ Zr doping improved the bulk conductivity and generated surface defects, while the ex-situ Be doping enhanced the surface charge transfer properties. The Co-Pi cocatalyst-coated Zr/Be-HT photoanode achieved substantial hydrogen and oxygen gas production, making this codoping strategy a promising method for sustainable and efficient hydrogen fuel production.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Chemical
Minhua Ai, Xidi Li, Lun Pan, Xiaoting Xu, Jin Yang, Ji-Jun Zou, Xiangwen Zhang
Summary: In this study, a secondary calcination strategy was developed to regulate the density and distribution of surface states in the hematite photoanode system, resulting in effective suppression of carrier recombination and reduction of kinetic overpotential, leading to improved photoelectrochemical efficiency.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Mamta Devi Sharma, Mrinmoyee Basu
Summary: Photoelectrochemical water splitting is a greener method for hydrogen production, but developing suitable semiconductor materials for practical applications is a challenge. This study investigates CdIn(2.2)Sy (CIS) as a visible-light-active semiconductor photoanode and enhances its efficiency and stability by decorating it with S and N codoped C-dots (S, N-CDs). The results show that this design improves photocurrent density and photoconversion efficiency while maintaining stability under continuous back illumination.
ACS APPLIED NANO MATERIALS
(2022)
