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Li L, Fang S, Chen W, Li Y, Vafadar MF, Wang D, Kang Y, Liu X, Luo Y, Liang K, Dang Y, Zhao L, Zhao S, Yin Z, Sun H. Facile Semiconductor p-n Homojunction Nanowires with Strategic p-Type Doping Engineering Combined with Surface Reconstruction for Biosensing Applications. NANO-MICRO LETTERS 2024; 16:192. [PMID: 38743197 PMCID: PMC11093954 DOI: 10.1007/s40820-024-01394-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 03/11/2024] [Indexed: 05/16/2024]
Abstract
Photosensors with versatile functionalities have emerged as a cornerstone for breakthroughs in the future optoelectronic systems across a wide range of applications. In particular, emerging photoelectrochemical (PEC)-type devices have recently attracted extensive interest in liquid-based biosensing applications due to their natural electrolyte-assisted operating characteristics. Herein, a PEC-type photosensor was carefully designed and constructed by employing gallium nitride (GaN) p-n homojunction semiconductor nanowires on silicon, with the p-GaN segment strategically doped and then decorated with cobalt-nickel oxide (CoNiOx). Essentially, the p-n homojunction configuration with facile p-doping engineering improves carrier separation efficiency and facilitates carrier transfer to the nanowire surface, while CoNiOx decoration further boosts PEC reaction activity and carrier dynamics at the nanowire/electrolyte interface. Consequently, the constructed photosensor achieves a high responsivity of 247.8 mA W-1 while simultaneously exhibiting excellent operating stability. Strikingly, based on the remarkable stability and high responsivity of the device, a glucose sensing system was established with a demonstration of glucose level determination in real human serum. This work offers a feasible and universal approach in the pursuit of high-performance bio-related sensing applications via a rational design of PEC devices in the form of nanostructured architecture with strategic doping engineering.
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Affiliation(s)
- Liuan Li
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Shi Fang
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Wei Chen
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Yueyue Li
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, People's Republic of China
| | - Mohammad Fazel Vafadar
- Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montreal, QC, H3A 0E9, Canada
| | - Danhao Wang
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Yang Kang
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Xin Liu
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Yuanmin Luo
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Kun Liang
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China
| | - Yiping Dang
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No 1277 Jiefang Ave., Wuhan, 430022, People's Republic of China
| | - Lei Zhao
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No 1277 Jiefang Ave., Wuhan, 430022, People's Republic of China
| | - Songrui Zhao
- Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montreal, QC, H3A 0E9, Canada
| | - Zongzhi Yin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei, 230022, People's Republic of China.
| | - Haiding Sun
- iGaN Laboratory, School of Microelectronics, University of Science and Technology of China, Hefei, 230026, People's Republic of China.
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Liu C, Li F, Wang L, Li Z, Zhao Y, Li Y, Li W, Zhao Z, Fan K, Li F, Sun L. Polymeric viologen-based electron transfer mediator for improving the photoelectrochemical water splitting on Sb 2Se 3 photocathode. FUNDAMENTAL RESEARCH 2024; 4:291-299. [PMID: 38933506 PMCID: PMC11197680 DOI: 10.1016/j.fmre.2022.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/20/2022] [Accepted: 03/22/2022] [Indexed: 11/19/2022] Open
Abstract
The photogenerated charge carrier separation and transportation of inside photocathodes can greatly influence the performance of photoelectrochemical (PEC) H2 production devices. Coupling TiO2 with p-type semiconductors to construct heterojunction structures is one of the most widely used strategies to facilitate charge separation and transportation. However, the band position of TiO2 could not perfectly match with all p-type semiconductors. Here, taking antimony selenide (Sb2Se3) as an example, a rational strategy was developed by introducing a viologen electron transfer mediator (ETM) containing polymeric film (poly-1,1'-dially-[4,4'-bipyridine]-1,1'-diium, denoted as PV2+) at the interface between Sb2Se3 and TiO2 to regulate the energy band alignment, which could inhibit the recombination of photogenerated charge carriers of interfaces. With Pt as a catalyst, the constructed Sb2Se3/PV2+/TiO2/Pt photocathode showed a superior PEC hydrogen generation activity with a photocurrent density of -18.6 mA cm-2 vs. a reversible hydrogen electrode (RHE) and a half-cell solar-to-hydrogen efficiency (HC-STH) of 1.54% at 0.17 V vs. RHE, which was much better than that of the related Sb2Se3/TiO2/Pt photocathode without PV2+ (-9.8 mA cm-2, 0.51% at 0.10 V vs. RHE).
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Affiliation(s)
- Chang Liu
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Fusheng Li
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Linqin Wang
- Center of Artificial Photosynthesis for Solar Fuels, School of Science, Westlake University, Hangzhou 310024, China
| | - Zeju Li
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yilong Zhao
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yingzheng Li
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Wenlong Li
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Ziqi Zhao
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Ke Fan
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Fei Li
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Licheng Sun
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Institute for Energy Science and Technology, Dalian University of Technology, Dalian 116024, China
- Center of Artificial Photosynthesis for Solar Fuels, School of Science, Westlake University, Hangzhou 310024, China
- Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm 10044, Sweden
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3
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Hojamberdiev M, Vargas R, Zhang F, Teshima K, Lerch M. Perovskite BaTaO 2 N: From Materials Synthesis to Solar Water Splitting. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2305179. [PMID: 37852947 PMCID: PMC10667847 DOI: 10.1002/advs.202305179] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/16/2023] [Indexed: 10/20/2023]
Abstract
Barium tantalum oxynitride (BaTaO2 N), as a member of an emerging class of perovskite oxynitrides, is regarded as a promising inorganic material for solar water splitting because of its small band gap, visible light absorption, and suitable band edge potentials for overall water splitting in the absence of an external bias. However, BaTaO2 N still exhibits poor water-splitting performance that is susceptible to its synthetic history, surface states, recombination process, and instability. This review provides a comprehensive summary of previous progress, current advances, existing challenges, and future perspectives of BaTaO2 N for solar water splitting. A particular emphasis is given to highlighting the principles of photoelectrochemical (PEC) water splitting, classic and emerging photocatalysts for oxygen evolution reactions, and the crystal and electronic structures, dielectric, ferroelectric, and piezoelectric properties, synthesis routes, and thin-film fabrication of BaTaO2 N. Various strategies to achieve enhanced water-splitting performance of BaTaO2 N, such as reducing the surface and bulk defect density, engineering the crystal facets, tailoring the particle morphology, size, and porosity, cation doping, creating the solid solutions, forming the heterostructures and heterojunctions, designing the photoelectrochemical cells, and loading suitable cocatalysts are discussed. Also, the avenues for further investigation and the prospects of using BaTaO2 N in solar water splitting are presented.
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Affiliation(s)
- Mirabbos Hojamberdiev
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Ronald Vargas
- Instituto Tecnológico de Chascomús (INTECH) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Universidad Nacional de San Martín (UNSAM)Avenida Intendente Marino, Km 8,2, (B7130IWA)ChascomúsProvincia de Buenos AiresArgentina
- Escuela de Bio y NanotecnologíasUniversidad Nacional de San Martín (UNSAM)Avenida Intendente Marino, Km 8,2, (B7130IWA)ChascomúsProvincia de Buenos AiresArgentina
| | - Fuxiang Zhang
- State Key Laboratory of CatalysisiChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian116023P.R. China
| | - Katsuya Teshima
- Department of Materials ChemistryShinshu University4‐17‐1 WakasatoNagano3808553Japan
- Research Initiative for Supra‐MaterialsShinshu University4‐17‐1 WakasatoNagano3808553Japan
| | - Martin Lerch
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
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Fouemina JCN, Li G, She X, Yan D, Lv X, Nie K, Deng J, Xu H. Surface Self-Transforming FeTi-LDH Overlayer in Fe 2 O 3 /Fe 2 TiO 5 Photoanode for Improved Water Oxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301114. [PMID: 37282737 DOI: 10.1002/smll.202301114] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/16/2023] [Indexed: 06/08/2023]
Abstract
Integrating hematite nanostructures with efficient layer double hydroxides (LDHs) is highly desirable to improve the photoelectrochemical (PEC) water oxidation performance. Here, an innovative and facile strategy is developed to fabricate the FeTi-LDH overlayer decorated Fe2 O3 /Fe2 TiO5 photoanode via a surface self-transformation induced by the co-treatment of hydrazine and NaOH at room temperature. Electrochemical measurements find that this favorable structure can not only facilitate the charge transfer/separation at the electrode/electrolyte interface but also accelerate the surface water oxidation kinetics. Consequently, the as-obtained Fe2 O3 /Fe2 TiO5 /LDH photoanode exhibits a remarkably increased photocurrent density of 3.54 mA cm-2 at 1.23 V versus reversible hydrogen electrode (RHE) accompanied by an obvious cathodic shift (≈140 mV) in the onset potential. This work opens up a new and effective pathway for the design of high-performance hematite photoanodes toward efficient PEC water oxidation.
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Affiliation(s)
| | - Guoqing Li
- Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiaojie She
- Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, 999077, P. R. China
| | - Duan Yan
- Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiaoxin Lv
- Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Kaiqi Nie
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiujun Deng
- Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Hui Xu
- Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
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5
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Li D, Wei R, Sun F, Cheng Z, Yin H, Fan F, Wang X, Li C. Determining the Transformation Kinetics of Water Oxidation Intermediates on Hematite Photoanode. J Phys Chem Lett 2023; 14:8069-8076. [PMID: 37656051 DOI: 10.1021/acs.jpclett.3c02090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
The oxygen evolution reaction (OER) from water is a sequential oxidation reaction process, involved in transformation of multiple reaction intermediates. For photo(electro)catalytic OER, revealing the intermediates transformation kinetics is quite challenging due to its coupling with photogenerated charge dynamics. Herein, we specifically study the transformation kinetics of the OER intermediates in rationally thin hematite photoanodes through increasing the ratio between surface intermediates and photogenerated charges in bulk. We directly identify the formation and consumption kinetics of one-hole OER intermediate (FeIV═O) in photoelectrochemical water oxidation using operando transient absorption (TA) spectroscopy. The microsecond formation kinetics of the FeIV═O species are sensitively changed by the excitation mode of Fe2O3. The subsecond consumption kinetics are closely dependent on surface FeIV═O species density, demonstrating that the cooperation of FeIV═O intermediates is the key to accelerating water oxidation kinetics on the Fe2O3 surface. This work provides insight into understanding and controlling water oxidation reaction kinetics on Fe2O3 surface.
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Affiliation(s)
- Dongfeng Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ruifang Wei
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Fusai Sun
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zeyu Cheng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Heng Yin
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Fengtao Fan
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Xiuli Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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6
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Li D, Wei R, Yin H, Zhang H, Wang X, Li C. Dynamic charge collecting mechanisms of cobalt phosphate on hematite photoanodes studied by photoinduced absorption spectroscopy. Chem Sci 2023; 14:1861-1870. [PMID: 36819856 PMCID: PMC9930927 DOI: 10.1039/d2sc05802b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 01/19/2023] [Indexed: 01/22/2023] Open
Abstract
Reaction sites, surface states, and surface loaded electrocatalysts are photoinduced charge storage sites and critical to photoelectrochemical (PEC) performance, however the charge transfer mechanisms involved in the three remain poorly understood. Herein, we studied the charge transfer processes in hematite (Fe2O3) without/with loaded cobalt phosphate (CoPi) by operando photoinduced absorption (PIA) spectroscopy. The loaded CoPi receives trapped holes in surface states at low potential and directly captures holes in the valence band at high potential. Through the dynamic hole storage mechanisms, loaded CoPi on Fe2O3 facilitates spatial charge separation and serves as a charge transfer mediator, instead of serving as a catalyst to change the water oxidation mechanism (constant third-order reaction). The spatial separation of photoinduced charges between Fe2O3 and CoPi results in more long-lived holes on the Fe2O3 surface to improve PEC water oxidation kinetically. The dynamic charge collecting mechanism sheds light on the understanding and designing of electrocatalyst loaded photoanodes.
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Affiliation(s)
- Dongfeng Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Ruifang Wei
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy Dalian 116023 China
- Department of Chemical Physics, University of Science and Technology of China Hefei 230026 China
| | - Heng Yin
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Hemin Zhang
- College of Materials Science and Engineering, Sichuan University, Engineering Research Center of Alternative Energy Materials and Devices, Ministry of Education Chengdu 610065 China
| | - Xiuli Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
- Department of Chemical Physics, University of Science and Technology of China Hefei 230026 China
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7
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Lv X, Zhang G, Wang M, Li G, Deng J, Zhong J. How titanium and iron are integrated into hematite to enhance the photoelectrochemical water oxidation: a review. Phys Chem Chem Phys 2023; 25:1406-1420. [PMID: 36594624 DOI: 10.1039/d2cp04969d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Hematite has been considered as a promising photoanode candidate for photoelectrochemical (PEC) water oxidation and has attracted numerous interests in the past decades. However, intrinsic drawbacks drastically lower its photocatalytic activity. Ti-based modifications including Ti-doping, Fe2O3/Fe2TiO5 heterostructures, TiO2 passivation layers, and Ti-containing underlayers have shown great potential in enhancing the PEC conversion efficiency of hematite. Moreover, the combination of Ti-based modifications with various strategies towards more efficient hematite photoanodes has been widely investigated. Nevertheless, a corresponding comprehensive overview, especially with the most recent working mechanisms, is still lacking, limiting further improvement. In this respect, by summarizing the recent progress in Ti-modified hematite photoanodes, this review aims to demonstrate how the integration of titanium and iron atoms into hematite influences the PEC properties by tuning the carrier behaviours. It will provide more cues for the rational design of high-performance hematite photoanodes towards future practical applications.
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Affiliation(s)
- Xiaoxin Lv
- Institute for Energy Research, Automotive Engineering Research Institute, Jiangsu University, Zhenjiang, 212013, China.
| | - Gaoteng Zhang
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, China.
| | - Menglian Wang
- Institute for Energy Research, Automotive Engineering Research Institute, Jiangsu University, Zhenjiang, 212013, China.
| | - Guoqing Li
- Institute for Energy Research, Automotive Engineering Research Institute, Jiangsu University, Zhenjiang, 212013, China.
| | - Jiujun Deng
- Institute for Energy Research, Automotive Engineering Research Institute, Jiangsu University, Zhenjiang, 212013, China.
| | - Jun Zhong
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, China.
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8
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Chong R, Wang Z, Fan M, Wang L, Chang Z, Zhang L. Hematite decorated with nanodot-like cobalt (oxy)hydroxides for boosted photoelectrochemical water oxidation. J Colloid Interface Sci 2023; 629:217-226. [PMID: 36152578 DOI: 10.1016/j.jcis.2022.09.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/26/2022] [Accepted: 09/04/2022] [Indexed: 11/22/2022]
Abstract
Photoelectrochemical (PEC) water splitting has been considered as an alternative process to produce green hydrogen. However, the energy conversion efficiency of PEC systems was still limited by the inefficient photoanode. Cocatalysts decoration is regarded as an efficient strategy for improving PEC performance of photoanode. In this work, nanodot-like cobalt (oxy)hydroxides was rationally decorated on hematite to fabricate CoOOH/Fe2O3 photoanode. The resulted CoOOH/Fe2O3 exhibits a high photocurrent density of 1.92 mA cm-2 at 1.23 V vs. RHE, which is 2.6 times than that of bare Fe2O3. In addition, the onset potential displays a cathodic shift of ca. 110 mV, indicating that CoOOH can efficiently accelerate water oxidation kinetics over Fe2O3. The comprehensive PEC and electrochemical characterizations reveal that CoOOH could not only provide abundant accessible Co active sites for water oxidation, but also could passivate the surface states of Fe2O3, thus increase the carrier density and decrease the interfacial resistance. As a result, the PEC water oxidation performance over Fe2O3 was significantly boosted. This work supports that the roles of CoOOH cocatalyst is generic and such CoOOH could be used for other semiconductor-based photoanodes for outstanding PEC water splitting performance.
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Affiliation(s)
- Ruifeng Chong
- Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloys, Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Zhenzhen Wang
- Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloys, Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Ming Fan
- Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloys, Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Li Wang
- Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloys, Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Zhixian Chang
- Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloys, Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
| | - Ling Zhang
- Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloys, Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
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9
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Solution chemistry back-contact FTO/hematite interface engineering for efficient photocatalytic water oxidation. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63973-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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10
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Kong H, Park JS, Kim JH, Hwang S, Yeo J. Hydrothermal Synthesis in Gap: Conformal Deposition of Textured Hematite Thin Films for Efficient Photoelectrochemical Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2022; 14:16515-16526. [PMID: 35362321 DOI: 10.1021/acsami.2c00128] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Obtaining high performance of hematite (α-Fe2O3) in a photoelectrochemical (PEC) water splitting cell is a challenging task because of its poor electrical conductivity and extremely short carrier lifetime. Here, we introduce a new hydrothermal method, called gap hydrothermal synthesis (GAP-HS), to obtain textured hematite thin films with an outstanding PEC water oxidation performance. GAP-HS proceeds in a precursor-solution-filled narrow gap to induce an anisotropic ion supply. This gives rise to an interesting phenomenon associated with the growth of nanomaterials that reflect the texture of the used substrates. Also, GAP-HS causes the preferential growth of hematite crystal along the [110] direction, leading to improved electrical conductivity within the (001) basal plane. The hematite thin films obtained via GAP-HS exhibit a very high photocurrent of more than 1.3 mA cm-2 at 1.23 V with respect to the reversible hydrogen electrode with 550 °C annealing only. It is the highest photocurrent, to the best of our knowledge, obtained for the hydrothermally synthesized pristine hematite photoanode. Because the low-temperature annealing allows avoiding of substrate deformation, the hematite thin films obtained via GAP-HS are expected to be advantageous for tandem-cell configuration.
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Affiliation(s)
- Heejung Kong
- Department of Physics, Kyungpook National University, 80 Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Ji-Sang Park
- Department of Physics, Kyungpook National University, 80 Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Jong Hwa Kim
- Daegu Center, Korea Basic Science Institute, 80 Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Suwon Hwang
- Department of Physics, Kyungpook National University, 80 Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
| | - Junyeob Yeo
- Department of Physics, Kyungpook National University, 80 Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
- Department of Hydrogen and Renewable Energy, Kyungpook National University, 80 Daehak-ro, Buk-gu, 41566 Daegu, Republic of Korea
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