1
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Jędras A, Matusik J, Dhanaraman E, Fu YP, Cempura G. Tuning the Structural and Electronic Properties of Zn-Cr LDH/GCN Heterostructure for Enhanced Photodegradation of Estrone in UV and Visible Light. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40. [PMID: 39140300 PMCID: PMC11363147 DOI: 10.1021/acs.langmuir.4c01897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 08/05/2024] [Accepted: 08/06/2024] [Indexed: 08/15/2024]
Abstract
Estrone is an emerging contaminant found in waters and soils all over the world. Conventional water treatment methods are not suitable for estrone removal due to its nonpolarity and low bioavailability. Heterogeneous photocatalysis is a promising approach; however, pristine semiconductors need optimization for efficient estrone photodegradation. Herein, we compared Zn-Cr LDH/GCN heterostructures obtained by three different synthesis methods. The influence of the GCN content in the heterostructure on photoactivity was also tested. The morphology, structure, and electronic properties of the materials were analyzed and compared. The photocatalytic kinetic tests were conducted with 1 ppm of estrone in both UV and visible light, separately. The HLDH-G50 material, obtained by the hydrothermal route and containing 50 wt % of GCN exhibited the highest photocatalytic efficiency. After 1 h, 99.5% of the estrone was degraded in visible light. In UV light, the pollutant concentration was below the detection limit after 0.5 h. The superior effectiveness was caused by numerous factors such as high homogeneity of the formed heterostructure, lower band gap energy of hydrothermal LDH, and increased photocurrent. These characteristics led to prolonged lifetimes of charge carriers, a wider light absorption range, and uniformity of the material for predictable performance. This study highlights the importance of a proper heterostructure engineering strategy for acquiring highly effective photocatalysts designed for water purification. In particular, this work provides innovative insight into comparing different synthesis methods and their influence on materials' properties.
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Affiliation(s)
- Anna Jędras
- Faculty
of Geology, Geophysics and Environmental Protection, Department of
Mineralogy, Petrography and Geochemistry, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Jakub Matusik
- Faculty
of Geology, Geophysics and Environmental Protection, Department of
Mineralogy, Petrography and Geochemistry, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Esakkinaveen Dhanaraman
- Department
of Materials Science and Engineering, National
Dong Hwa University, Shou-Feng, Hualien 97401, Taiwan
| | - Yen-Pei Fu
- Department
of Materials Science and Engineering, National
Dong Hwa University, Shou-Feng, Hualien 97401, Taiwan
| | - Grzegorz Cempura
- Faculty
of Metal Engineering and Industrial Computer Science, International
Centre of Electron Microscopy for Materials Science, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland
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2
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Welden R, Das A, Krause S, Schöning MJ, Wagner PH, Wagner T. Actively Driven Light-Addressable Sensor/Actuator System for Automated pH Control for the Integration in Lab-On-A-Chip (LoC) Platforms. ACS Sens 2024; 9:1533-1544. [PMID: 38445576 DOI: 10.1021/acssensors.3c02712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
The miniaturization of microfluidic systems usually comes at the cost of more difficult integration of sensors and actuators inside the channel. As an alternative, this work demonstrates the embedding of semiconductor-based sensor and actuator technologies that can be spatially and temporally controlled from outside the channel using light. The first element is a light-addressable potentiometric sensor, consisting of an Al/Si/SiO2/Si3N4 structure, that can measure pH changes at the Si3N4/electrolyte interface. The pH value is a crucial factor in biological and chemical systems, and besides measuring, it is often important to bring the system out of equilibrium or to adjust and control precisely the surrounding medium. This can be done photoelectrocatalytically by utilizing light-addressable electrodes. These consist of a glass/SnO2:F/TiO2 structure, whereby direct charge transfer between the TiO2 and the electrolyte leads to a pH change upon irradiation. To complement the advantages of both, we integrated a light-addressable sensor with a pH sensitivity of 41.5 mV·pH-1 and a light-addressable electrode into a microfluidic setup. Here, we demonstrated a simultaneous operation with the ability to generate and record pH gradients inside a channel under static and dynamic flow conditions. The results show that dependent on the light-addressable electrode (LAE)-illumination conditions, pH changes up to ΔpH of 2.75 and of 3.52 under static and dynamic conditions, respectively, were spatially monitored by the light-addressable potentiometric sensor. After flushing with fresh buffer solution, the pH returned to its initial value. Depending on the LAE illumination, pH gradients with a maximum pH change of ΔpH of 1.42 were tailored perpendicular to the flow direction. In a final experiment, synchronous LAE illumination led to a stepwise increase in the pH inside the channel.
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Affiliation(s)
- Rene Welden
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, Jülich 52428, Germany
- Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200D, Leuven 3001, Belgium
| | - Anirban Das
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
| | - Steffi Krause
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
| | - Michael J Schöning
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, Jülich 52428, Germany
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich GmbH, Jülich 52428, Germany
| | - Patrick H Wagner
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, Jülich 52428, Germany
- Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200D, Leuven 3001, Belgium
| | - Torsten Wagner
- Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences, Heinrich-Mußmann-Str. 1, Jülich 52428, Germany
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich GmbH, Jülich 52428, Germany
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3
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Zhang S, Leng W. Quantitative Determination the Role of the Intrabandgap States in Water Photooxidation over Hematite Electrodes. J Phys Chem Lett 2023; 14:9316-9323. [PMID: 37818854 DOI: 10.1021/acs.jpclett.3c02461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
The intrabandgap states on the hematite (α-Fe2O3) electrodes are believed to play an important role in water photooxidation. Yet, it is not fully understood how the intrabandgap states are involved in the reaction. In this work, the intraband-gap states in water photooxidation on α-Fe2O3 electrodes are investigated by a combination of multiple (photo-) electrochemical techniques and operando spectroscopic methods. Two kinds of surface states are observed on the electrodes during water photooxidation, and their roles are quantitatively determined by the correlation with the steady-state photocurrent. It is demonstrated that the intrinsic electronic surface state close to the conduction band can act only as the recombination center for the photocarriers. However, the photogenerated surface state closer to the valence band is revealed to be the reactant in the rate-determining step in oxygen evolution reaction. These findings may be beneficial to elucidate the actual function of the surface states and provide insights into the kinetic and mechanism studies of water photooxidation on the α-Fe2O3 electrodes.
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Affiliation(s)
- Shufeng Zhang
- Department of Chemistry, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Wenhua Leng
- Department of Chemistry, Zijingang Campus, Zhejiang University, Hangzhou, Zhejiang 310058, China
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4
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Grinberg VA, Emets VV, Mayorova NA, Averin AA, Shiryaev AA. Photoelectrocatalytic Activity of ZnO-Modified Hematite Films in the Reaction of Alcohol Degradation. Int J Mol Sci 2023; 24:14046. [PMID: 37762351 PMCID: PMC10531269 DOI: 10.3390/ijms241814046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
Thin-film nanocrystalline hematite electrodes were fabricated by electrochemical deposition and loaded with electrodeposited zinc oxide in various amounts. Under visible light illumination, these electrodes demonstrate high activity in the photoelectrochemical degradation of methanol, ethylene glycol and, in particular, glycerol. Results of intensity-modulated photocurrent spectroscopy show that the photoelectrocatalysis efficiency is explained by the suppression of the electron-hole pair recombination and an increase in the rate of photo-induced charge transfer. Thus, zinc oxide can be considered an effective modifying additive for hematite photoanodes.
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Affiliation(s)
- Vitali A. Grinberg
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31, Building 4, 119071 Moscow, Russia; (V.V.E.); (N.A.M.); (A.A.A.); (A.A.S.)
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5
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Liu T, Li W, Wang DZ, Luo T, Fei M, Shin D, Waegele MM, Wang D. Low Catalyst Loading Enhances Charge Accumulation for Photoelectrochemical Water Splitting. Angew Chem Int Ed Engl 2023; 62:e202307909. [PMID: 37382150 DOI: 10.1002/anie.202307909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 06/30/2023]
Abstract
Solar water oxidation is a critical step in artificial photosynthesis. Successful completion of the process requires four holes and releases four protons. It depends on the consecutive accumulation of charges at the active site. While recent research has shown an obvious dependence of the reaction kinetics on the hole concentrations on the surface of heterogeneous (photo)electrodes, little is known about how the catalyst density impacts the reaction rate. Using atomically dispersed Ir catalysts on hematite, we report a study on how the interplay between the catalyst density and the surface hole concentration influences the reaction kinetics. At low photon flux, where surface hole concentrations are low, faster charge transfer was observed on photoelectrodes with low catalyst density compared to high catalyst density; at high photon flux and high applied potentials, where surface hole concentrations are moderate or high, slower surface charge recombination was afforded by low-density catalysts. The results support that charge transfer between the light absorber and the catalyst is reversible; they reveal the unexpected benefits of low-density catalyst loading in facilitating forward charge transfer for desired chemical reactions. It is implied that for practical solar water splitting devices, a suitable catalyst loading is important for maximized performance.
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Affiliation(s)
- Tianying Liu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Wei Li
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - David Z Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Tongtong Luo
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Muchun Fei
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Dongyoon Shin
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Matthias M Waegele
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Dunwei Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
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6
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Piccioni A, Vecchi P, Vecchi L, Grandi S, Caramori S, Mazzaro R, Pasquini L. Distribution of Relaxation Times Based on Lasso Regression: A Tool for High-Resolution Analysis of IMPS Data in Photoelectrochemical Systems. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:7957-7964. [PMID: 37181327 PMCID: PMC10166235 DOI: 10.1021/acs.jpcc.3c00770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/05/2023] [Indexed: 05/16/2023]
Abstract
Intensity-modulated photocurrent spectroscopy (IMPS) has been largely employed in semiconductor characterization for solar energy conversion devices to probe the operando behavior with widely available facilities. However, the implementation of IMPS data analysis to complex structures, whether based on the physical rate constant model (RCM) or the assumption-free distribution of relaxation times (DRT), is generally limited to a semi-quantitative description of the charge carrier kinetics of the system. In this study, a new algorithm for the analysis of IMPS data is developed, providing unprecedented time resolution to the investigation of μs to s charge carrier dynamics in semiconductor-based systems used in photoelectrochemistry and photovoltaics. The algorithm, based on the previously developed DRT analysis, is herein modified with a Lasso regression method and available to the reader free of charge. A validation of this new algorithm is performed on a α-Fe2O3 photoanode for photoelectrochemical water splitting, identified as a standard platform in the field, highlighting multiple potential-dependent charge transfer paths, otherwise hidden in the conventional IMPS data analysis.
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Affiliation(s)
- Alberto Piccioni
- Department
of Physics and Astronomy, University of
Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy
| | - Pierpaolo Vecchi
- Department
of Physics and Astronomy, University of
Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy
| | - Lorenzo Vecchi
- Department
of Mathematics, University of Bologna, Piazza di Porta San Donato 5, 40126 Bologna, Italy
| | - Silvia Grandi
- Department
of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Stefano Caramori
- Department
of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Raffaello Mazzaro
- Department
of Physics and Astronomy, University of
Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy
| | - Luca Pasquini
- Department
of Physics and Astronomy, University of
Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy
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7
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Fontaine B, Benrkia Y, Blach JF, Mathieu C, Roussel P, Ayesh AI, Sayede A, Saitzek S. Photoelectrochemical properties of copper pyrovanadate (Cu 2V 2O 7) thin films synthesized by pulsed laser deposition. RSC Adv 2023; 13:12161-12174. [PMID: 37091600 PMCID: PMC10113821 DOI: 10.1039/d3ra01509b] [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: 03/07/2023] [Accepted: 04/05/2023] [Indexed: 04/25/2023] Open
Abstract
Polymorphic phases of copper pyrovanadate (α- and β-Cu2V2O7) were synthesized by solid state reaction and the mechanisms governing the phase transitions have been highlighted by the ThermoGravimetric Analysis (TGA) and the Differential Scanning Calorimetry (DSC). The thermal evolution of the lattice parameters was determined by high temperature X-ray Diffraction revealing negative thermal expansion coefficients. The thermogravimetric analysis coupled with differential scanning calorimetry was also used to determine the optimal conditions to obtain a dense target in order to produce thin films by the Pulsed Laser Deposition (PLD) technique. Thin films elaborated under different oxygen pressures and temperatures exhibit a β-Cu2V2O7 polycrystalline phase and their band gap indicates absorption in the visible range. These oxides can be used as photoanodes and their photoelectrochemical properties were studied for both bulk (α-Cu2V2O7) and thin films (β-Cu2V2O7), as a function of the wavelength and/or intensity of the luminous flux. The best photocurrent efficiency was obtained under 450 nm illumination. Moreover, in the case of thin films, we have observed a linear evolution of the current density with the luminous flux. Finally, the photostability of thin films was measured and shows a reduction in the photocurrent of 8% after 1 h of measurement. This photocorrosion phenomenon was also highlighted by the elemental mapping performed on thin films by Scanning Electron Microscopy (SEM) coupled with Energy Dispersive X-ray Spectrometry (EDS).
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Affiliation(s)
- Blandine Fontaine
- Univ. Artois, CNRS, Centrale Lille, Univ. Lille, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS) F-62300 Lens France +33 321177955 +33 321791732
| | - Youssef Benrkia
- Univ. Artois, CNRS, Centrale Lille, Univ. Lille, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS) F-62300 Lens France +33 321177955 +33 321791732
| | - Jean-François Blach
- Univ. Artois, CNRS, Centrale Lille, Univ. Lille, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS) F-62300 Lens France +33 321177955 +33 321791732
| | - Christian Mathieu
- Univ. Artois, CNRS, Centrale Lille, Univ. Lille, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS) F-62300 Lens France +33 321177955 +33 321791732
| | - Pascal Roussel
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS) F-59000 Lille France
| | - Ahmad I Ayesh
- Physics Program, Department of Math. Stat. and Physics, College of Arts and Sciences, Qatar University P. O. Box: 2713 Doha Qatar
| | - Adlane Sayede
- Univ. Artois, CNRS, Centrale Lille, Univ. Lille, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS) F-62300 Lens France +33 321177955 +33 321791732
| | - Sébastien Saitzek
- Univ. Artois, CNRS, Centrale Lille, Univ. Lille, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS) F-62300 Lens France +33 321177955 +33 321791732
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8
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Benkó T, Shen S, Németh M, Su J, Szamosvölgyi Á, Kovács Z, Sáfrán G, Al-Zuraiji SM, Horváth EZ, Sápi A, Kónya Z, Pap JS. BiVO4 charge transfer control by a water-insoluble iron complex for solar water oxidation. APPLIED CATALYSIS A-GENERAL 2023. [DOI: 10.1016/j.apcata.2023.119035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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9
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Xue J, Zhang H, Guan R, Liu T, Gao J, Liu X, Wu M, Guo K, Jia H, Shen Q. Kinetics analysis of oxygen vacancies in TiO2 solar water reduction: Revealing effects and eliminating disadvantages. J Colloid Interface Sci 2023; 630:382-393. [DOI: 10.1016/j.jcis.2022.10.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 10/11/2022] [Accepted: 10/20/2022] [Indexed: 11/07/2022]
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10
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Ramakrishnan V, Tsyganok A, Davydova E, Pavan MJ, Rothschild A, Visoly-Fisher I. Competitive Photo-Oxidation of Water and Hole Scavengers on Hematite Photoanodes: Photoelectrochemical and Operando Raman Spectroelectrochemistry Study. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Vivek Ramakrishnan
- Swiss Institute for Dryland Environmental and Energy Research, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion8499000, Israel
| | - Anton Tsyganok
- Department of Materials Science and Engineering, Technion − Israel Institute of Technology, Haifa3200002, Israel
| | - Elena Davydova
- Department of Materials Science and Engineering, Technion − Israel Institute of Technology, Haifa3200002, Israel
| | - Mariela J. Pavan
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Be’er Sheva8410501, Israel
| | - Avner Rothschild
- Department of Materials Science and Engineering, Technion − Israel Institute of Technology, Haifa3200002, Israel
- The Nancy & Stephen Grand Technion Energy Program (GTEP), Technion − Israel Institute of Technology, Haifa3200002, Israel
| | - Iris Visoly-Fisher
- Swiss Institute for Dryland Environmental and Energy Research, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion8499000, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Be’er Sheva8410501, Israel
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11
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Hydrothermal Synthesized CoS2 as Efficient Co-Catalyst to Improve the Interfacial Charge Transfer Efficiency in BiVO4. INORGANICS 2022. [DOI: 10.3390/inorganics10120264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The bare surface of BiVO4 photoanode usually suffers from extremely low interfacial charge transfer efficiency which leads to a significantly suppressed photoelectrochemical water splitting performance. Various strategies, including surface modification and the loading of co-catalysts, facilitate the interface charge transfer process in BiVO4. In this study, we demonstrate that CoS2 synthesized from the hydrothermal method can be used as a high-efficient co-catalyst to sufficiently improve the interface charge transfer efficiency in BiVO4. The photoelectrochemical water splitting performance of BiVO4 was significantly improved after CoS2 surface modification. The BiVO4/CoS2 photoanode achieved an excellent photocurrent density of 5.2 mA/cm2 at 1.23 V versus RHE under AM 1.5 G illumination, corresponding to a 3.7 times enhancement in photocurrent compared with bare BiVO4. The onset potential of the BiVO4/CoS2 photoanode was also negatively shifted by 210 mV. The followed systematic combined optical and electrochemical characterization results reveal that the interfacial charge transfer efficiency of BiVO4 was largely improved from less than 20% to more than 70% due tor CoS2 surface modification. The further surface carrier dynamics study performed using an intensity modulated photocurrent spectroscopy displayed a 6–10 times suppression in surface recombination rate constants for CoS2 modified BiVO4, which suggests that the key reason for the improved interfacial charge transfer efficiency possibly originates from the passivated surface states due to the coating of CoS2.
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12
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Liu K, Zhang B, Zhang J, Lin W, Wang J, Xu Y, Xiang Y, Hisatomi T, Domen K, Ma G. Synthesis of Narrow-Band-Gap GaN:ZnO Solid Solution for Photocatalytic Overall Water Splitting. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Kaiwei Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, P. R. China
- University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Boyang Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, P. R. China
- University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Jifang Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, P. R. China
| | - Wenrui Lin
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, P. R. China
| | - Jiaming Wang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, P. R. China
- University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Yao Xu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, P. R. China
| | - Yao Xiang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, P. R. China
- University of Chinese Academy of Sciences, Beijing100049, P. R. China
| | - Takashi Hisatomi
- Research Initiative for Supra-Materials (RISM), Shinshu University, 4-17-1 Wakasato, Nagano-shi, Nagano380-8553, Japan
- PRESTO, Japan Science and Technology Agency, 4-17-1 Wakasato, Nagano-shi, Nagano380-8553, Japan
| | - Kazunari Domen
- Research Initiative for Supra-Materials (RISM), Shinshu University, 4-17-1 Wakasato, Nagano-shi, Nagano380-8553, Japan
- Office of University Professors, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo113-8656, Japan
| | - Guijun Ma
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, P. R. China
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13
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Righi G, Plescher J, Schmidt FP, Campen RK, Fabris S, Knop-Gericke A, Schlögl R, Jones TE, Teschner D, Piccinin S. On the origin of multihole oxygen evolution in haematite photoanodes. Nat Catal 2022. [DOI: 10.1038/s41929-022-00845-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
AbstractThe oxygen evolution reaction (OER) plays a crucial role in (photo)electrochemical devices that use renewable energy to produce synthetic fuels. Recent measurements on semiconducting oxides have found a power law dependence of the OER rate on surface hole density, suggesting a multihole mechanism. In this study, using transient photocurrent measurements, density functional theory simulations and microkinetic modelling, we have uncovered the origin of this behaviour in haematite. We show here that the OER rate has a third-order dependence on the surface hole density. We propose a mechanism wherein the reaction proceeds by accumulating oxidizing equivalents through a sequence of one-electron oxidations of surface hydroxy groups. The key O–O bond formation step occurs by the dissociative chemisorption of a hydroxide ion involving three oxyl sites. At variance with the case of metallic oxides, the activation energy of this step is weakly dependent on the surface hole coverage, leading to the observed power law.
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14
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Photoelectrocatalytic Properties of a Ti-Modified Nanocrystalline Hematite Film Photoanode. Catalysts 2022. [DOI: 10.3390/catal12101243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Photoelectrocatalytic oxidation of methanol, ethylene glycol, glycerol, and 5,6,7,8-tetrahydro-2-naphthol on thin-film nanocrystalline hematite electrodes fabricated by electrochemical deposition and promoted with spin-coated titanium has been studied. It is shown that the modification of hematite transforms it into material exhibiting high activity in the photoelectrochemical process of substrate oxidation upon illumination with light in the visible region of the spectrum. The highest activity is observed in the reaction of photoelectrocatalytic oxidation of glycerol. Results of intensity-modulated photocurrent spectroscopy (IMPS) suggest that the effect is due to an increased rate of charge transfer in the process of photoelectro-oxidation and efficient suppression of the recombination of generated electron-hole pairs. Therefore, thin-film photoanodes based on modified hematite are promising for practical application in the photooxidation of glycerol, a by-product of biofuel production, as well as in the photoelectrochemical degradation of other organic pollutants, including those formed during the production of pharmaceuticals.
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15
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Ahn HJ, Kment S, Naldoni A, Zbořil R, Schmuki P. Band gap and Morphology Engineering of Hematite Nanoflakes from an Ex Situ Sn Doping for Enhanced Photoelectrochemical Water Splitting. ACS OMEGA 2022; 7:35109-35117. [PMID: 36211042 PMCID: PMC9535642 DOI: 10.1021/acsomega.2c04028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 08/31/2022] [Indexed: 06/16/2023]
Abstract
In this article, we report a simple ex situ Sn-doping method on hematite nanoflakes (coded as MSnO2-H) that can protect the nanoflake (NF) morphology against the 800 °C high-temperature annealing process and activate the photoresponse of hematite until 800 nm wavelength excitation. MSnO2-H has been fabricated by dropping SnCl4 ethanol solution on hematite nanoflakes homogeneously grown over the conductive FTO glass substrate and annealed at 500 °C to synthesize the SnO2 nanoparticles on hematite NFs. The Sn-treated samples were then placed in a furnace again, and the sintering process was conducted at 800 °C for 15 min. During this step, structure deformation of hematite occurs normally due to the grain boundary motion and oriented attachment. However, in the case of MSnO2-H, the outer SnO2 nanoparticles efficiently prevented a shape deformation and maintained the nanoflake shape owing to the encapsulation of hematite NFs. Furthermore, the interface of hematite/SnO2 nanoparticles became the spots for a heavy Sn ion doping. We demonstrated the generation of the newly localized states, resulting in an extension of the photoresponse of hematite until 800 nm wavelength light irradiation. Furthermore, we demonstrated that SnO2 nanoparticles can effectively act as a passivation layer, which can reduce the onset potential of hematite for water splitting redox reactions. The optimized MSnO2-H nanostructures showed a 2.84 times higher photocurrent density and 300 mV reduced onset potential compared with a pristine hematite nanoflake photoanode.
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Affiliation(s)
- Hyo-Jin Ahn
- LSTME
Busan Branch, 31, Gwahaksandan
1-ro 60beon-gil, Gangseo-gu, 46742 Busan, Republic of Korea
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, 17. Listopadu 1192/12, 771 46 Olomouc, Czech Republic
- Department
of Materials Science and Engineering, University
of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
| | - Stepan Kment
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, 17. Listopadu 1192/12, 771 46 Olomouc, Czech Republic
- Nanotechnology
Centre, Centre of Energy and Environmental Technologies, VŠB−Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Alberto Naldoni
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, 17. Listopadu 1192/12, 771 46 Olomouc, Czech Republic
- Department
of Chemistry and NIS Centre, University
of Turin, 10125 Torino, Italy
| | - Radek Zbořil
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, 17. Listopadu 1192/12, 771 46 Olomouc, Czech Republic
- Nanotechnology
Centre, Centre of Energy and Environmental Technologies, VŠB−Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Patrik Schmuki
- Regional
Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, 17. Listopadu 1192/12, 771 46 Olomouc, Czech Republic
- Department
of Materials Science and Engineering, University
of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
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16
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Ma J, Chi H, Wang A, Wang P, Jing H, Yao T, Li C. Identifying and Removing the Interfacial States in Metal-Oxide–Semiconductor Schottky Si Photoanodes for the Highest Fill Factor. J Am Chem Soc 2022; 144:17540-17548. [DOI: 10.1021/jacs.2c06748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiangping Ma
- Key Laboratory of Advanced Catalysis, Gansu Province; State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
| | - Haibo Chi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
- School of Chemical and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Aoqi Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
- School of Chemical and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Pengpeng Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
| | - Huanwang Jing
- Key Laboratory of Advanced Catalysis, Gansu Province; State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Tingting Yao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
| | - Can Li
- Key Laboratory of Advanced Catalysis, Gansu Province; State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
- School of Chemical and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
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17
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Zhang J, Wang J, Tang Y, Liu K, Zhang B, Ma G. Insight into the Light-Driven Hydrogen Production over Pure and Rh-Doped Rutile in the Presence of Ascorbic Acid: Impact of Interfacial Chemistry on Photocatalysts. ACS APPLIED MATERIALS & INTERFACES 2022; 14:34656-34664. [PMID: 35860844 DOI: 10.1021/acsami.2c06302] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The surface states of a semiconductor photocatalyst are essential for interfacial charge transfer in heterogeneous photocatalytic reactions. Here, we report that the light-driven hydrogen evolution reaction (HER) activity of 0.5 mol % Rh-doped rutile increases by more than 30 times compared with that of rutile when ascorbic acid is used as a sacrificial agent. Intensity-modulated photocurrent spectroscopy and surface photovoltage spectroscopy are employed to reveal the impact of surface states on the photo-oxidation reactions. It is found that the adsorption of ascorbic acid molecules dramatically reduces the activity of rutile due to coverage of the HER-active Ti sites. Nevertheless, for Rh-doped rutile, ascorbic acid neutralizes the Rh(IV) sites that would otherwise cause severe recombination of electron-hole pairs and resurrects its photocatalytic performance. This work demonstrates the key role of interfacial chemistry in photocatalytic reactions and provides a strategy for excavating the potential of various photocatalysts.
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Affiliation(s)
- Jifang Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Jiaming Wang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Yecheng Tang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Kaiwei Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Boyang Zhang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Guijun Ma
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
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18
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McMillan NK, Lopez DA, Leem G, Sherman BD. BiVO4 Photoanodes for TEMPO‐Mediated Benzyl Alcohol Oxidation in Organic Media. Chempluschem 2022; 87:e202200187. [DOI: 10.1002/cplu.202200187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/27/2022] [Indexed: 11/07/2022]
Affiliation(s)
| | | | - Gyu Leem
- SUNY-ESF: SUNY College of Environmental Science and Forestry Chemistry UNITED STATES
| | - Benjamin D Sherman
- Texas Christian University Chemistry TCU Box 298860 76129 Fort Worth UNITED STATES
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19
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Betova I, Bojinov M, Karastoyanov V. Anodic oxide films on stainless steel as prospective photo-anodes for light-assisted electrochemical water splitting. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Grinberg VA, Emets VV, Mayorova NA, Averin AA, Tsodikov MV, Maslov DA. Methanol Photoelectrooxidation on Hematite Films Modified with TiO2, Bi, and Co. RUSS J ELECTROCHEM+ 2022. [DOI: 10.1134/s1023193522080055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Fang Y, Hou Y, Fu X, Wang X. Semiconducting Polymers for Oxygen Evolution Reaction under Light Illumination. Chem Rev 2022; 122:4204-4256. [PMID: 35025505 DOI: 10.1021/acs.chemrev.1c00686] [Citation(s) in RCA: 82] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Sunlight-driven water splitting to produce hydrogen fuel has stimulated intensive scientific interest, as this technology has the potential to revolutionize fossil fuel-based energy systems in modern society. The oxygen evolution reaction (OER) determines the performance of overall water splitting owing to its sluggish kinetics with multielectron transfer processing. Polymeric photocatalysts have recently been developed for the OER, and substantial progress has been realized in this emerging research field. In this Review, the focus is on the photocatalytic technologies and materials of polymeric photocatalysts for the OER. Two practical systems, namely, particle suspension systems and film-based photoelectrochemical systems, form two main sections. The concept is reviewed in terms of thermodynamics and kinetics, and polymeric photocatalysts are discussed based on three key characteristics, namely, light absorption, charge separation and transfer, and surface oxidation reactions. A satisfactory OER performance by polymeric photocatalysts will eventually offer a platform to achieve overall water splitting and other advanced applications in a cost-effective, sustainable, and renewable manner using solar energy.
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Affiliation(s)
- Yuanxing Fang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China
| | - Yidong Hou
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China
| | - Xianzhi Fu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China
| | - Xinchen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China
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22
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Bai H, Lam SH, Yang J, Cheng X, Li S, Jiang R, Shao L, Wang J. A Schottky-Barrier-Free Plasmonic Semiconductor Photocatalyst for Nitrogen Fixation in a "One-Stone-Two-Birds" Manner. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2104226. [PMID: 34655458 DOI: 10.1002/adma.202104226] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 10/11/2021] [Indexed: 06/13/2023]
Abstract
Plasmonic photocatalysis has received much attention owing to attractive plasmonic enhancement effects in improving the solar-to-chemical conversion efficiency. However, the photocatalytic efficiencies have remained low mainly due to the short carrier lifetime caused by the rapid recombination of plasmon-generated hot charge carriers. Although plasmonic metal-semiconductor heterostructures can improve the separation of hot charge carriers, a large portion of the hot charge carriers are lost when they cross the Schottky barrier. Herein, a Schottky-barrier-free plasmonic semiconductor photocatalyst, MoO3- x , which allows for efficient N2 photofixation in a "one-stone-two-birds" manner, is demonstrated. The oxygen vacancies in MoO3- x serve as the "stone." They "kill two birds" by functioning as the active sites for the chemisorption of N2 molecules and inducing localized surface plasmon resonance for the generation of hot charge carriers. Benefiting from this unique strategy, plasmonic MoO3- x exhibits a remarkable photoreactivity for NH3 production up to the wavelength of 1064 nm with apparent quantum efficiencies over 1%, and a solar-to-ammonia conversion efficiency of 0.057% without any hole scavenger. This work shows the great potential of plasmonic semiconductors to be directly used for photocatalysis. The concept of the Schottky-barrier-free design will pave a new path for the rational design of efficient photocatalysts.
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Affiliation(s)
- Haoyuan Bai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Shiu Hei Lam
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Jianhua Yang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Xizhe Cheng
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Shasha Li
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Ruibin Jiang
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Lei Shao
- Beijing Computational Science Research Center, Beijing, 100193, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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23
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Nakajima T, Tateno H, Miseki Y, Tsuchiya T, Sayama K. Solar-to-Pharmaceutical Raw Material Production: Photoelectrochemical Naphthoquinone Formation Using Stabilized BiVO 4 Photoanodes in Acid Media. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57132-57141. [PMID: 34823359 DOI: 10.1021/acsami.1c16777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In the quest for efficient use of solar energy to produce high-value-added chemicals, we first achieved the photoelectrochemical (PEC) diketonization of naphthalene, using a BiVO4/WO3 photoanode, to obtain naphthoquinone, an important pharmaceutical raw material with excellent efficiency by solar energy conversion. In the electrochemical (EC) reaction using F-doped SnO2 (FTO) substrates and a 0.5 M H2SO4 H2O-acetone (60 vol %) mixed solution containing 5 mM naphthalene, we produced a small amount of naphthoquinone evolution in the dark. However, naphthoquinone (ηNQ)'s Faradic efficiency and its evolution rate at 1.7 VAg/AgCl were only 28.5% and 0.48 μmol·cm-2·h-1, respectively. The PEC reaction using a WO3 photoanode had very low efficiency for naphthalene diketonization, with low ηNQ and evolution rate values at 1.1 VAg/AgCl of 0.3% and 0.039 μmol·cm-2·h-1, respectively. In contrast, the BiVO4/WO3 photoanode strongly enhanced the PEC reaction, and the ηNQ and evolution rates at 1.1 VAg/AgCl were boosted up to 37.5% and 4.7 μmol·cm-2·h-1, respectively. The evolution rate of the PEC reaction in the BiVO4/WO3 photoanode was 10 times higher than that of the EC reaction with the FTO substrate regardless of the very low bias voltage. This result suggests that the BiVO4-based photoanode was very efficient for the selective oxidation of naphthalene even in acid media because of the acetone-mixed electrolyte's anti-photocorrosion effect and the multilayering of WO3 and BiVO4. At a naphthalene concentration of 20 mM, the naphthoquinone evolution rate reached its maximum value of 7.1 μmol·cm-2·h-1. Although ηNQ tended to decrease with the increase in the electric charge, it reached 100% at a low bias voltage of 0.7 VAg/AgCl. An intensity-modulated photocurrent spectroscopy analysis indicated the rate constant of charge transfer at the photoanode surface to the naphthalene molecules was strongly enhanced at a low bias voltage of 0.7-1.1 VAg/AgCl, resulting in the high ηNQ value. The acid-resistant BiVO4/WO3 photoanode functioned in acetone-mixed electrolytes enabled the realization of a new PEC oxidation reaction driven by solar energy to produce high-value-added pharmaceutical raw materials.
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Affiliation(s)
- Tomohiko Nakajima
- Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Hiroyuki Tateno
- Energy Process Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba West 5, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Yugo Miseki
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Tetsuo Tsuchiya
- Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Kazuhiro Sayama
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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24
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Zhang J, Lin Q, Wang Z, Liu H, Li X, Zhang Y. Identifying Water Oxidation Mechanisms at Pure and Titanium-Doped Hematite-Based Photoanodes with Spectroelectrochemistry. SMALL METHODS 2021; 5:e2100976. [PMID: 34928039 DOI: 10.1002/smtd.202100976] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/08/2021] [Indexed: 06/14/2023]
Abstract
Investigation of the mechanism of the water oxidation reaction for hematite photoanodes has been one of the most persistently pursued topics in the course of understanding photoelectrochemical water splitting by transition metal oxides. Unfortunately, existing experimental techniques often require over-simplified models and theories that assume only one reaction path. In this work, however, it is proposed that water oxidation on hematite can proceed via mixed reaction paths according to spectroelectrochemical results without a priori assumptions. The true absorption signals of surface states responsible for water oxidation are isolated from subsidiary signals for undoped and Ti-doped hematite and contrasted with those of inactive species. The evolution of absorption signals as a function of applied potential and illumination intensity highlights the non-negligible contribution of direct hole transfer, especially for highly doped hematite.
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Affiliation(s)
- Jifang Zhang
- State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, P.R. China
| | - Qiyuan Lin
- State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, P.R. China
| | - Zhenlei Wang
- State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, P.R. China
| | - Haowen Liu
- State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, P.R. China
| | - Xuanzhang Li
- State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, P.R. China
| | - Yuegang Zhang
- State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, P.R. China
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25
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Gong R, Mitoraj D, Leiter R, Mundszinger M, Mengele AK, Krivtsov I, Biskupek J, Kaiser U, Beranek R, Rau S. Anatase-Wrapped Rutile Nanorods as an Effective Electron Collector in Hybrid Photoanodes for Visible Light-Driven Oxygen Evolution. Front Chem 2021; 9:709903. [PMID: 34485243 PMCID: PMC8416449 DOI: 10.3389/fchem.2021.709903] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 07/14/2021] [Indexed: 11/18/2022] Open
Abstract
Arrays of single crystal TiO2 rutile nanorods (RNRs) appear highly promising as electron-collecting substrates in hybrid photoanodes as the RNRs offer direct charge carriers transport pathways, contrary to the conventional electrodes prepared from TiO2 powders that suffer from the numerous charge traps at the grain boundaries. However, the specific surface area of the nanorods is highly limited by their smooth morphology, which might be detrimental in view of utilizing the RNR as a substrate for immobilizing other functional materials. In this study, we developed a novel anatase-wrapped RNR (ARNR) material fabricated by a facile seed layer-free hydrothermal method. The ARNR comprises polycrystalline anatase nanoparticles formed on the surface of RNR, resulting in a large surface area that provides more deposition sites compared to the bare nanorods. Herein, we functionalize ARNR and RNR electrodes with polymeric carbon nitride (CNx) coupled with a CoO(OH)x cocatalyst for dioxygen evolution. The anatase wrapping of the rutile nanorod scaffold is found to be crucial for effective deposition of CNx and for improved photoanode operation in visible light-driven (λ > 420 nm) oxygen evolution, yielding a significant enhancement of photocurrent (by the factor of ∼3.7 at 1.23 V vs. RHE) and faradaic efficiency of oxygen evolution (by the factor of ∼2) as compared to photoanodes without anatase interlayer. This study thus highlights the importance of careful interfacial engineering in constructing photoelectrocatalytic systems for solar energy conversion and paves the way for the use of ARNR-based electron collectors in further hybrid and composite photochemical architectures for solar fuel production.
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Affiliation(s)
- Ruihao Gong
- Institute for Inorganic Chemistry I, Ulm University, Ulm, Germany
| | | | - Robert Leiter
- Electron Microscopy Group of Materials Science, Ulm University, Ulm, Germany
| | - Manuel Mundszinger
- Electron Microscopy Group of Materials Science, Ulm University, Ulm, Germany
| | | | - Igor Krivtsov
- Institute of Electrochemistry, Ulm University, Ulm, Germany
| | - Johannes Biskupek
- Electron Microscopy Group of Materials Science, Ulm University, Ulm, Germany
| | - Ute Kaiser
- Electron Microscopy Group of Materials Science, Ulm University, Ulm, Germany
| | - Radim Beranek
- Institute of Electrochemistry, Ulm University, Ulm, Germany
| | - Sven Rau
- Institute for Inorganic Chemistry I, Ulm University, Ulm, Germany
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26
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Effect of Potential and Chlorides on Photoelectrochemical Removal of Diethyl Phthalate from Water. Catalysts 2021. [DOI: 10.3390/catal11080882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Removal of persistent pollutants from water by photoelectrocatalysis has emerged as a promising powerful process. Applied potential plays a key role in the photocatalytic activity of the semi-conductor as well as the possible presence of chloride ions in the solution. This work aims to investigate these effects on the photoelectrocatalytic oxidation of diethyl phthalate (DEP) by using TiO2 nanotubular anodes under solar light irradiation. PEC tests were performed at constant potentials under different concentration of NaCl. The process is able to remove DEP following a pseudo-first order kinetics: values of kapp of 1.25 × 10−3 min−1 and 1.56 × 10−4 min−1 have been obtained at applied potentials of 1.8 and 0.2 V, respectively. Results showed that, depending on the applied potential, the presence of chloride ions in the solution affects the degradation rate resulting in a negative effect: the presence of 500 mM of Cl− reduces the value of kapp by 50 and 80% at 0.2 and 1.8 V respectively.
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28
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Sameie H, Alvani AS, Mei B, Salimi R, Poelman D, Rosei F. Mo-doped ZnV2O6/reduced graphene oxide photoanodes for solar hydrogen production. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138333] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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29
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Photocurrent conversion efficiency of TiO2 nanotube photoanodes in dependence of illumination intensity. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137988] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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30
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Francàs L, Selim S, Corby S, Lee D, Mesa CA, Pastor E, Choi KS, Durrant JR. Water oxidation kinetics of nanoporous BiVO 4 photoanodes functionalised with nickel/iron oxyhydroxide electrocatalysts. Chem Sci 2021; 12:7442-7452. [PMID: 34163834 PMCID: PMC8171343 DOI: 10.1039/d0sc06429g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
In this work, spectroelectrochemical techniques are employed to analyse the catalytic water oxidation performance of a series of three nickel/iron oxyhydroxide electrocatalysts deposited on FTO and BiVO4, at neutral pH. Similar electrochemical water oxidation performance is observed for each of the FeOOH, Ni(Fe)OOH and FeOOHNiOOH electrocatalysts studied, which is found to result from a balance between degree of charge accumulation and rate of water oxidation. Once added onto BiVO4 photoanodes, a large enhancement in the water oxidation photoelectrochemical performance is observed in comparison to the un-modified BiVO4. To understand the origin of this enhancement, the films were evaluated through time-resolved optical spectroscopic techniques, allowing comparisons between electrochemical and photoelectrochemical water oxidation. For all three catalysts, fast hole transfer from BiVO4 to the catalyst is observed in the transient absorption data. Using operando photoinduced absorption measurements, we find that water oxidation is driven by oxidised states within the catalyst layer, following hole transfer from BiVO4. This charge transfer is correlated with a suppression of recombination losses which result in remarkably enhanced water oxidation performance relative to un-modified BiVO4. Moreover, despite similar electrocatalytic behaviour of all three electrocatalysts, we show that variations in water oxidation performance observed among the BiVO4/MOOH photoanodes stem from differences in photoelectrochemical and electrochemical charge accumulation in the catalyst layers. Under illumination, the amount of accumulated charge in the catalyst is driven by the injection of photogenerated holes from BiVO4, which is further affected by the recombination loss at the BiVO4/MOOH interface, and thus leads to deviations from their behaviour as standalone electrocatalysts. Elucidating the role of charge accumulation and reaction kinetics in governing the performance of Ni/Fe oxyhydroxides as electrocatalysts and as co-catalysts on BiVO4 photoanodes water oxidation.![]()
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Affiliation(s)
- Laia Francàs
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Shababa Selim
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Sacha Corby
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Dongho Lee
- Department of Chemistry, University of Wisconsin-Madison Madison Wisconsin 53706 USA
| | - Camilo A Mesa
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Ernest Pastor
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
| | - Kyoung-Shin Choi
- Department of Chemistry, University of Wisconsin-Madison Madison Wisconsin 53706 USA
| | - James R Durrant
- Department of Chemistry, Centre for Processable Electronics, Imperial College London, White City Campus London W12 0BZ UK
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31
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Choong CE, Wong KT, Kim H, Jang SB, Yoon SY, Nah IW, Kim W, Kim SH, Jeon BH, Yoon Y, Jang M. Unexpected discovery of superoxide radical generation by oxygen vacancies containing biomass derived granular activated carbon. WATER RESEARCH 2021; 190:116757. [PMID: 33360030 DOI: 10.1016/j.watres.2020.116757] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 12/06/2020] [Accepted: 12/15/2020] [Indexed: 05/29/2023]
Abstract
Herein, we discovered and reported oxygen vacancies in silicon oxycarbide containing granular palm shell activated carbon (Si-PSAC) as a photocatalyst under UV irradiation. A strong correlation between the atomic content of Si1+, oxygen vacancies and photocatalytic performance of Si-PSAC was obtained. Based on the electron paramagnetic resonance and photoluminescence analyses, Si-PSAC under UVA365 irradiation exhibited a higher donor density, better charge transfer and lower electron-hole recombination than that under the other light sources, leading to a higher O2· production efficiency. Si-PSAC exhibited effective removal performance for various anionic dyes and endocrine-disrupting chemicals under UVA365 irradiation. Continuous-flow column tests revealed the life span of Si-PSAC under UVA365 irradiation was extended by more than 16-fold compared to adsorption column. Since the oxygen vacancies can be created from the naturally present Si in the biomass derived Si-PSAC during the activation, this unexpected discovery of O2· production can extend commercially-available Si-PSAC into the full-scale photocatalysis.
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Affiliation(s)
- Choe Earn Choong
- Department of Environmental Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Kien Tiek Wong
- Department of Environmental Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Hyeseong Kim
- Department of Environmental Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
| | - Seok Byum Jang
- Department of Environmental Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
| | - So Yeon Yoon
- Department of Environmental Engineering, Kwangwoon University, Seoul 01897, Republic of Korea
| | - In Wook Nah
- Center for Energy Convergence, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Wooyul Kim
- Department of Chemical and Biological Engineering, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Sang-Hyoun Kim
- Department of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Yeomin Yoon
- Department of Civil and Environmental Engineering, University of South Carolina, Columbia, 300 Main Street, SC, 29208, USA
| | - Min Jang
- Department of Environmental Engineering, Kwangwoon University, Seoul 01897, Republic of Korea.
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32
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Mitchell E, Law A, Godin R. Experimental determination of charge carrier dynamics in carbon nitride heterojunctions. Chem Commun (Camb) 2021; 57:1550-1567. [PMID: 33491708 DOI: 10.1039/d0cc06841a] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Carbon nitride (CNx) is an emerging photocatalyst with the potential to efficiently produce solar fuels. CNx heterojunctions often show significant photocatalytic activity improvements. We review the charge carrier dynamics in a range of CNx heterojunctions including carbon-based material, black phosphorus, Ru complexes, molybdenum sulphide and metal phosphides. Time resolved photoluminescence (TRPL) and transient absorption spectroscopy (TAS) were the most common techniques employed for experimental charge carrier dynamics measurements. The low photoluminescence quantum yield of CNx appeared to limit the depth of conclusions from TRPL, with both lengthening and shortening of the TRPL lifetimes observed and attributed to enhanced charge separation. Overall, the charge carrier dynamics studies often showed a relative lifetime change of ∼2-fold and an activity improvement of >10-fold. We highlight the need for the use of a wider range of techniques to monitor the charge carrier dynamics for conclusive determination of photophysics-activity relationships and elucidation of improvement mechanisms.
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Affiliation(s)
- Emma Mitchell
- Department of Chemistry, The University of British Columbia, 3247 University Way, Kelowna, BC, V1V 1V7, Canada
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33
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Ning P, Liang J, Li L, Chen D, Qin L, Yao X, Chen H, Huang Y. In situ growth of Z-scheme CuS/CuSCN heterojunction to passivate surface defects and enhance charge transport. J Colloid Interface Sci 2021; 590:407-414. [PMID: 33561590 DOI: 10.1016/j.jcis.2020.12.126] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/23/2020] [Accepted: 12/30/2020] [Indexed: 11/25/2022]
Abstract
Copper thiocyanate (CuSCN) has been considered as a promising hole transport material (HTMs), attributing to its inherent stability, low-cost, and suitable energy levels. To make it more attractive in practical applications, the drawbacks of CuSCN in poor charge transport and serious defect recombination are bottlenecks that need to be overcome. In this work, we propose an effective strategy of in-situ decorating CuSCN with copper sulfide quantum dots (CuS QDs), a simple one-step electrochemical deposition process, to solve these issues. Compared with the pristine CuSCN, the constructed Z-Scheme heterojunction of CuS QDs/CuSCN can significantly promote charge transport and restrict recombination. In addition, the decorated CuS QDs can not only passivate defects of CuSCN, but also provide more contacting sites to facilitate hole injection when employing as HTM. As a result, the average bulk charge lifetime was improved from 0.37 ms to 0.47 ms, and the surface recombination rate constant was suppressed. We believe that the excellent performances will pave it toward practical device applications, including solar cells, photocatalysis, photoelectrochemical sensors, and light-emitting diodes.
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Affiliation(s)
- Pei Ning
- College of Materials and Chemistry, China Jiliang University, Hangzhou 300018, Zhejiang, China
| | - Junhui Liang
- College of Materials and Chemistry, China Jiliang University, Hangzhou 300018, Zhejiang, China.
| | - Linghui Li
- College of Materials and Chemistry, China Jiliang University, Hangzhou 300018, Zhejiang, China
| | - Da Chen
- College of Materials and Chemistry, China Jiliang University, Hangzhou 300018, Zhejiang, China.
| | - Laishun Qin
- College of Materials and Chemistry, China Jiliang University, Hangzhou 300018, Zhejiang, China
| | - Xin Yao
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 300018, Zhejiang, China
| | - Huayu Chen
- College of Materials and Chemistry, China Jiliang University, Hangzhou 300018, Zhejiang, China
| | - Yuexiang Huang
- College of Materials and Chemistry, China Jiliang University, Hangzhou 300018, Zhejiang, China
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34
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Zhou D, Fan K, Zhuo Q, Zhao Y, Sun L. In Situ Induced Crystalline-Amorphous Heterophase Junction by K + to Improve Photoelectrochemical Water Oxidation of BiVO 4. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2723-2733. [PMID: 33411507 DOI: 10.1021/acsami.0c19948] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Solar water splitting is one of the most efficient technologies to produce H2, which is a clean and renewable energy carrier. Photoanodes for water oxidation play the determining roles in solar water splitting, while its photoelectrochemical (PEC) performance is severely limited by the hole injection efficiency at the interface of semiconductor/electrolyte. To address this problem, in this research, by employing BiVO4 as the model semiconductor for photoanodes, we develop a novel, facile, and efficient method, which simply applies K cations in the preparation process of BiVO4 photoanodes, to in situ induce a crystalline-amorphous heterophase junction by the formation of an amorphous BiVO4 layer (a-BiVO4) on the surface of the crystalline BiVO4 (c-BiVO4) film for PEC water oxidation. The K cation is the key to stimulate the formation of the heterophase, but not incorporated in the final photoelectrodes. Without sacrificing the light absorption, the in situ formed a-BiVO4 layer accelerates the kinetics of the hole transfer at the photoanode/electrolyte interface, leading to the significantly increased efficiency of the surface hole injection to water molecules. Consequently, the BiVO4 photoanode with the crystalline-amorphous heterophase junction (a-BiVO4/c-BiVO4) exhibits almost twice the photocurrent density at 1.23 V (vs reversible hydrogen electrode) for water oxidation than the bare c-BiVO4 ones. Such advantages from the crystalline-amorphous heterophase junction are still effective even when the a-BiVO4/c-BiVO4 is coated by the cocatalyst of FeOOH, reflecting its broad applications in PEC devices. We believe this study can supply an efficient and simple protocol to enhance the PEC water oxidation performance of photoanodes, and provide a new strategy for the potential large-scale application of the solar energy-conversion related devices.
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Affiliation(s)
- Dinghua Zhou
- 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, 116024 Dalian, P. R. 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, 116024 Dalian, P. R. China
| | - Qiming Zhuo
- 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, 116024 Dalian, P. R. 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, 116024 Dalian, P. R. 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, 116024 Dalian, P. R. China
- Department of Chemistry, KTH Royal Institute of Technology, Stockholm 10044, Sweden
- Center of Artificial Photosynthesis for Solar Fuels, School of Science, Westlake University, 310024 Hangzhou, P. R. China
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35
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Barzgar Vishlaghi M, Kahraman A, Apaydin S, Usman E, Aksoy D, Balkan T, Munir S, Harfouche M, Ogasawara H, Kaya S. The significance of the local structure of cobalt-based catalysts on the photoelectrochemical water oxidation activity of BiVO4. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137467] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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36
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Kranz C, Wächtler M. Characterizing photocatalysts for water splitting: from atoms to bulk and from slow to ultrafast processes. Chem Soc Rev 2021; 50:1407-1437. [DOI: 10.1039/d0cs00526f] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
This review provides a comprehensive overview on characterisation techniques for light-driven redox-catalysts highlighting spectroscopic, microscopic, electrochemical and spectroelectrochemical approaches.
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Affiliation(s)
- Christine Kranz
- Ulm University
- Institute of Analytical and Bioanalytical Chemistry
- 89081 Ulm
- Germany
| | - Maria Wächtler
- Leibniz Institute of Photonic Technology
- Department Functional Interfaces
- 07745 Jena
- Germany
- Friedrich Schiller University Jena
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37
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Wang K, Liu Y, Kawashima K, Yang X, Yin X, Zhan F, Liu M, Qiu X, Li W, Mullins CB, Li J. Modulating Charge Transfer Efficiency of Hematite Photoanode with Hybrid Dual-Metal-Organic Frameworks for Boosting Photoelectrochemical Water Oxidation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2002563. [PMID: 33304764 PMCID: PMC7709986 DOI: 10.1002/advs.202002563] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/03/2020] [Indexed: 06/02/2023]
Abstract
The glorious charge transfer efficiency of photoanode is an important factor for efficient photoelectrochemical (PEC) water oxidation. However, it is often limited by slow kinetics of oxygen evolution reaction. Herein, a dual transition metal-based metal-organic frameworks (MOF) cocatalyst, Fe@Ni-MOF, is introduced into a titanium-doped hematite (Fe2O3:Ti) photoanode. The combination of Ni and Fe can optimize the filling of 3d orbitals. Moreover, the introduction of Fe donates electrons to Ni in the MOF structure, thus, suppressing the irreversible (long-life-time) oxidation of Ni2+ into Ni3+. The resulting Fe@Ni-MOF/Fe2O3:Ti photoanode exhibits ∼threefold enhancement in the photocurrent density at 1.23 V versus the reversible hydrogen electrode. Kinetic analysis of the PEC water oxidation processes indicates that this performance improvement is primarily due to modulating the charge transfer efficiency of hematite photoanode. Further results show that a single transition metal-based MOF cocatalyst, Ni-MOF, exhibits slow charge transfer in spite of a reduction in surface charge recombination, resulting in a smaller charge transfer efficiency. These findings provide new insights for the development of photoelectrodes decorated with MOFs.
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Affiliation(s)
- Keke Wang
- School of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China
| | - Yang Liu
- School of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China
| | - Kenta Kawashima
- McKetta Department of Chemical Engineering and Department of ChemistryUniversity of Texas at AustinAustinTX78712‐0231USA
| | - Xuetao Yang
- School of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China
| | - Xiang Yin
- School of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China
| | - Faqi Zhan
- School of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China
| | - Min Liu
- Institute of Super‐Microstructure and Ultrafast Process in Advanced MaterialsSchool of Physics and ElectronicsCentral South UniversityChangsha410083China
| | - Xiaoqing Qiu
- School of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China
| | - Wenzhang Li
- School of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China
- Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese ResourcesCentral South UniversityChangsha410083China
| | - Charles Buddie Mullins
- McKetta Department of Chemical Engineering and Department of ChemistryUniversity of Texas at AustinAustinTX78712‐0231USA
| | - Jie Li
- School of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China
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38
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Kandiel TA. Mechanistic investigation of water oxidation on hematite photoanodes using intensity-modulated photocurrent spectroscopy. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112825] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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39
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Berardi S, Kopula Kesavan J, Amidani L, Meloni EM, Marelli M, Boscherini F, Caramori S, Pasquini L. Better Together: Ilmenite/Hematite Junctions for Photoelectrochemical Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:47435-47446. [PMID: 32986954 PMCID: PMC8014905 DOI: 10.1021/acsami.0c12275] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
Hematite (α-Fe2O3) is an earth-abundant indirect n-type semiconductor displaying a band gap of about 2.2 eV, useful for collecting a large fraction of visible photons, with frontier energy levels suitably aligned for carrying out the photoelectrochemical water oxidation reaction under basic conditions. The modification of hematite mesoporous thin-film photoanodes with Ti(IV), as well as their functionalization with an oxygen-evolving catalyst, leads to a 6-fold increase in photocurrent density with respect to the unmodified electrode. In order to provide a detailed understanding of this behavior, we report a study of Ti-containing phases within the mesoporous film structure. Using X-ray absorption fine structure and high-resolution transmission electron microscopy coupled with electron energy loss spectroscopy, we find that Ti(IV) ions are incorporated within ilmenite (FeTiO3) near-surface layers, thus modifying the semiconductor-electrolyte interface. To the best of our knowledge, this is the first time that an FeTiO3/α-Fe2O3 composite is used in a photoelectrochemical setup for water oxidation. In fact, previous studies of Ti(IV)-modified hematite photoanodes reported the formation of pseudobrookite (Fe2TiO5) at the surface. By means of transient absorption spectroscopy, transient photocurrent experiments, and electrochemical impedance spectroscopy, we show that the formation of the Fe2O3/FeTiO3 interface passivates deep traps at the surface and induces a large density of donor levels, resulting in a strong depletion field that separates electron and holes, favoring hole injection in the electrolyte. Our results provide the identification of a phase coexistence with enhanced photoelectrochemical performance, allowing for the rational design of new photoanodes with improved kinetics.
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Affiliation(s)
- Serena Berardi
- Department
of Chemical and Pharmaceutical Sciences, University of Ferrara, via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Jagadesh Kopula Kesavan
- Department
of Physics and Astronomy, Alma Mater Studiorum−Università
di Bologna, viale Carlo Berti Pichat 6/2, 40127 Bologna, Italy
| | - Lucia Amidani
- Helmholtz-Zentrum
Dresden-Rossendorf, c/o European Synchrotron
Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Elia Marek Meloni
- Department
of Chemical and Pharmaceutical Sciences, University of Ferrara, via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Marcello Marelli
- CNR-SCITEC, Istituto di Scienze e Tecnologie Chimiche “Giulio
Natta”, Via Gaudenzio Fantoli 16/15, 20138 Milano, Italy
| | - Federico Boscherini
- Department
of Physics and Astronomy, Alma Mater Studiorum−Università
di Bologna, viale Carlo Berti Pichat 6/2, 40127 Bologna, Italy
| | - Stefano Caramori
- Department
of Chemical and Pharmaceutical Sciences, University of Ferrara, via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Luca Pasquini
- Department
of Physics and Astronomy, Alma Mater Studiorum−Università
di Bologna, viale Carlo Berti Pichat 6/2, 40127 Bologna, Italy
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40
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Guo Q, Luo H, Zhang J, Ruan Q, Prakash Periasamy A, Fang Y, Xie Z, Li X, Wang X, Tang J, Briscoe J, Titirici M, Jorge AB. The role of carbon dots - derived underlayer in hematite photoanodes. NANOSCALE 2020; 12:20220-20229. [PMID: 33000831 DOI: 10.1039/d0nr06139e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hematite is a promising candidate as photoanode for solar-driven water splitting, with a theoretically predicted maximum solar-to-hydrogen conversion efficiency of ∼16%. However, the interfacial charge transfer and recombination greatly limits its activity for photoelectrochemical water splitting. Carbon dots exhibit great potential in photoelectrochemical water splitting for solar to hydrogen conversion as photosensitisers and co-catalysts. Here we developed a novel carbon underlayer from low-cost and environmental-friendly carbon dots through a facile hydrothermal process, introduced between the fluorine-doped tin oxide conducting substrate and hematite photoanodes. This led to a remarkable enhancement in the photocurrent density. Owing to the triple functional role of carbon dots underlayer in improving the interfacial properties of FTO/hematite and providing carbon source for the overlayer as well as the change in the iron oxidation state, the bulk and interfacial charge transfer dynamics of hematite are significantly enhanced, and consequently led to a remarkable enhancement in the photocurrent density. The results revealed a substantial improvement in the charge transfer rate, yielding a charge transfer efficiency of up to 80% at 1.25 V vs. RHE. In addition, a significant enhancement in the lifetime of photogenerated electrons and an increased carrier density were observed for the hematite photoanodes modified with a carbon underlayer, confirming that the use of sustainable carbon nanomaterials is an effective strategy to boost the photoelectrochemical performance of semiconductors for energy conversion.
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Affiliation(s)
- Qian Guo
- School of Engineering and Materials Science, Queen Mary University of London, E1 4NS, London, UK.
| | - Hui Luo
- Department of Chemical Engineering, Imperial College London, SW7 2AZ, London, UK
| | - Jifang Zhang
- Tsinghua-Foxconn Nanoscience Research Center, Department of Physics, Tsinghua University, Beijing 100084, P. R. China
| | - Qiushi Ruan
- Department of Chemical Engineering, University College London, Torrington Place, WC1E 7JE, London, UK
| | - Arun Prakash Periasamy
- School of Engineering and Materials Science, Queen Mary University of London, E1 4NS, London, UK.
| | - Yuanxing Fang
- State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China
| | - Zailai Xie
- State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China
| | - Xuanhua Li
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China
| | - Xinchen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China
| | - Junwang Tang
- Department of Chemical Engineering, University College London, Torrington Place, WC1E 7JE, London, UK
| | - Joe Briscoe
- School of Engineering and Materials Science, Queen Mary University of London, E1 4NS, London, UK.
| | - Magdalena Titirici
- Department of Chemical Engineering, Imperial College London, SW7 2AZ, London, UK
| | - Ana Belen Jorge
- School of Engineering and Materials Science, Queen Mary University of London, E1 4NS, London, UK.
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41
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Peter LM, Walker AB, Bein T, Hufnagel AG, Kondofersky I. Interpretation of photocurrent transients at semiconductor electrodes: Effects of band-edge unpinning. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114234] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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42
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Denisov N, Qin S, Cha G, Yoo J, Schmuki P. Photoelectrochemical properties of “increasingly dark” TiO2 nanotube arrays. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114098] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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43
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Snir N, Toroker MC. The Operando Optical Spectrum of Hematite during Water Splitting through a GW-BSE Calculation. J Chem Theory Comput 2020; 16:4857-4864. [PMID: 32603108 DOI: 10.1021/acs.jctc.9b00595] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hematite is a possible photoanode for photoelectrochemical cells (PECs) that is widely studied using density functional theory (DFT). In this paper we perform more accurate calculations of the absorption spectrum of hematite using the one-shot Green's function (G0W0) and Bethe-Salpeter equation (BSE) methods, which take excited states into account and compare the spectrum to experimental data. We found a match between our calculations and the observed absorption spectra in peak locations. Furthermore, there is anisotropy of the absorption spectra that is concurrent with the crystal structure. We also calculated the absorption spectrum of hematite intermediates during catalysis of the oxygen evolution reaction to better understand which intermediate is dominant during the reaction and the contribution of excited states to catalysis. The *O intermediate was found to be the most optically and chemically dominant species during catalysis.
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Affiliation(s)
- Nadav Snir
- Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Maytal Caspary Toroker
- Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel.,The Nancy and Stephen Grand Technion Energy Program, Technion-Israel Institute of Technology, Haifa 3200003, Israel
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44
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Gao Y, Yang G, Dai Y, Li X, Gao J, Li N, Qiu P, Ge L. Electrodeposited Co-Substituted LaFeO 3 for Enhancing the Photoelectrochemical Activity of BiVO 4. ACS APPLIED MATERIALS & INTERFACES 2020; 12:17364-17375. [PMID: 32212636 DOI: 10.1021/acsami.9b21386] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Co-substituted LaFeO3 was electrodeposited on the surface of BiVO4 as a co-catalyst to enhance the water splitting performance. Compared to bare BiVO4, the BiVO4/Co-LaFeO3 composite photoanode shows a water oxidation photocurrent of 3.4 mA/cm2 at 1.23 V versus reverse hydrogen electrode, accompanied by a notable cathodic shift in the onset potential for 300 mV. Combined optical and electrochemical characterizations show that the solid/electrolyte charge transfer efficiency of BiVO4 are dramatically improved by the incorporation of Co-substituted LaFeO3. From the surface kinetic study of charge carriers by intensity-modulated photocurrent spectroscopy, a suppressed surface recombination rate constant is observed and the enhanced photoelectrochemical water splitting performance observed in the BiVO4/Co-LaFeO3 photoanode is attributed to the surface passivation effect of Co-substituted LaFeO3.
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Affiliation(s)
- Yangqin Gao
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijng, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin 300384, People's Republic of China
| | - Guoqing Yang
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijng, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin 300384, People's Republic of China
| | - Yanjie Dai
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijng, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
| | - Xuli Li
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijng, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
| | - Jianfeng Gao
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijng, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
| | - Ning Li
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijng, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
| | - Ping Qiu
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijng, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
| | - Lei Ge
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijng, No. 18 Fuxue Road, Beijing 102249, People's Republic of China
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45
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Li F, Li Y, Zhuo Q, Zhou D, Zhao Y, Zhao Z, Wu X, Shan Y, Sun L. Electroless Plating of NiFeP Alloy on the Surface of Silicon Photoanode for Efficient Photoelectrochemical Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:11479-11488. [PMID: 32056436 DOI: 10.1021/acsami.9b19418] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
N-type silicon is a kind of semiconductor with a narrow band gap that has been reported as an outstanding light-harvesting material for photoelectrochemical (PEC) reactions. Decorating a thin catalyst layer on the n-type silicon surface can provide a direct and effective route toward PEC water oxidation. However, most of catalyst immobilization methods for reported n-type silicon photoanodes have been based on energetically demanding, time-consuming, and high-cost processes. Herein, a high-performance NiFeP alloy (NiFeP)-decorated n-type micro-pyramid silicon array (n-Si) photoanode (NiFeP/n-Si) was prepared by a fast and low-cost electroless deposition method for light-driven water oxidation reaction. The saturated photocurrent density of NiFeP/n-Si can reach up to ∼40 mA cm-2, and a photocurrent density of 15.5 mA cm-2 can be achieved at 1.23 VRHE under light illumination (100 mW cm-2, AM1.5 filter), which is one of the most promising silicon-based photoanodes to date. The kinetic studies showed that the NiFeP on the silicon photoanodes could significantly decrease the interfacial charge recombination between the n-type silicon surface and electrolyte.
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Affiliation(s)
- 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
| | - 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
| | - Qiming Zhuo
- 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
| | - Dinghua Zhou
- 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
| | - 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
| | - Xiujuan Wu
- 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
| | - Yu Shan
- 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
- Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm 10044, Sweden
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46
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Amano F, Koga S. Influence of light intensity on the steady-state kinetics in tungsten trioxide particulate photoanode studied by intensity-modulated photocurrent spectroscopy. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113891] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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47
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Makimizu Y, Nguyen NT, Tucek J, Ahn HJ, Yoo J, Poornajar M, Hwang I, Kment S, Schmuki P. Activation of α-Fe 2 O 3 for Photoelectrochemical Water Splitting Strongly Enhanced by Low Temperature Annealing in Low Oxygen Containing Ambient. Chemistry 2020; 26:2685-2692. [PMID: 31788871 PMCID: PMC7065102 DOI: 10.1002/chem.201904430] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Indexed: 11/16/2022]
Abstract
Photoelectrochemical (PEC) water splitting is a promising method for the conversion of solar energy into chemical energy stored in the form of hydrogen. Nanostructured hematite (α‐Fe2O3) is one of the most attractive materials for a highly efficient charge carrier generation and collection due to its large specific surface area and the short minority carrier diffusion length. In the present work, the PEC water splitting performance of nanostructured α‐Fe2O3 is investigated which was prepared by anodization followed by annealing in a low oxygen ambient (0.03 % O2 in Ar). It was found that low oxygen annealing can activate a significant PEC response of α‐Fe2O3 even at a low temperature of 400 °C and provide an excellent PEC performance compared with classic air annealing. The photocurrent of the α‐Fe2O3 annealed in the low oxygen at 1.5 V vs. RHE results as 0.5 mA cm−2, being 20 times higher than that of annealing in air. The obtained results show that the α‐Fe2O3 annealed in low oxygen contains beneficial defects and promotes the transport of holes; it can be attributed to the improvement of conductivity due to the introduction of suitable oxygen vacancies in the α‐Fe2O3. Additionally, we demonstrate the photocurrent of α‐Fe2O3 annealed in low oxygen ambient can be further enhanced by Zn‐Co LDH, which is a co‐catalyst of oxygen evolution reaction. This indicates low oxygen annealing generates a promising method to obtain an excellent PEC water splitting performance from α‐Fe2O3 photoanodes.
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Affiliation(s)
- Yoichi Makimizu
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany.,Steel Research Laboratory, JFE Steel Corporation, 1 Kokan-cho, Fukuyama, Hiroshima, 721-8510, Japan
| | - Nhat Truong Nguyen
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany.,Present address: Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Jiri Tucek
- RCPTM, Faculty of Science, Palacky University, 17. listopadu 12, 771 46, Olomouc, Czechia
| | - Hyo-Jin Ahn
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany.,RCPTM, Faculty of Science, Palacky University, 17. listopadu 12, 771 46, Olomouc, Czechia.,Present address: German Engineering Research and Development Center LSTME Busan, Affiliate Institute to FA Universität 7 Erlangen, 1276 Jisa-Dong, Gangseo-Gu, Busan, 46742, Korea
| | - JeongEun Yoo
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Mahshid Poornajar
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Imgon Hwang
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Stepan Kment
- RCPTM, Faculty of Science, Palacky University, 17. listopadu 12, 771 46, Olomouc, Czechia
| | - Patrik Schmuki
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany.,RCPTM, Faculty of Science, Palacky University, 17. listopadu 12, 771 46, Olomouc, Czechia.,Chemistry Department, Faculty of Sciences, King Abdulaziz University, 80203, Jeddah, Saudi Arabia Kingdom
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48
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Grinberg VA, Emets VV, Maslov DA, Tsodikov MV, Mayorova NA, Averin AA, Fedotov AS, Marinova M, Simon P. Photoelectrocatalytic activity of In( iii)-modified TiO 2 photoanodes in the visible spectrum region. NEW J CHEM 2020. [DOI: 10.1039/d0nj03162c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nanocrystalline film photoanodes of titanium dioxide modified with In(iii) ions in the concentration range from 1.0 to 10 mass% (0.23 to 2.52 at%) are manufactured using the sol–gel method.
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Affiliation(s)
- V. A. Grinberg
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | - V. V. Emets
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | - D. A. Maslov
- A.V. Topchiev Institute of Petrochemical Synthesis
- Russian Academy of Sciences
- Moscow
- Russia
| | - M. V. Tsodikov
- A.V. Topchiev Institute of Petrochemical Synthesis
- Russian Academy of Sciences
- Moscow
- Russia
| | - N. A. Mayorova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | - A. A. Averin
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | - A. S. Fedotov
- A.V. Topchiev Institute of Petrochemical Synthesis
- Russian Academy of Sciences
- Moscow
- Russia
| | - M. Marinova
- Institut Chevreul
- FR2638 CNRS, Bât. C6 Université Lille 1
- F-9655 Villeneuve d’Ascq
- France
| | - P. Simon
- Univ. Lille, CNRS
- Centrale Lille
- ENSCL, Univ. Artois
- UMR 8181 – UCCS – Unité de Catalyse et Chimie du Solide
- F-59000 Lille
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49
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Orlandi M, Berardi S, Mazzi A, Caramori S, Boaretto R, Nart F, Bignozzi CA, Bazzanella N, Patel N, Miotello A. Rational Design Combining Morphology and Charge-Dynamic for Hematite/Nickel-Iron Oxide Thin-Layer Photoanodes: Insights into the Role of the Absorber/Catalyst Junction. ACS APPLIED MATERIALS & INTERFACES 2019; 11:48002-48012. [PMID: 31797662 DOI: 10.1021/acsami.9b19790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Water oxidation represents the anodic reaction in most of the photoelectrosynthetic setups for artificial photosynthesis developed so far. The efficiency of the overall process strongly depends on the joint exploitation of good absorber domains and interfaces with minimized recombination pathways. To this end, we report on the effective coupling of thin-layer hematite with amorphous porous nickel-iron oxide catalysts prepared via pulsed laser deposition. The rational design of such composite photoelectrodes leads to the formation of a functional adaptive junction, with enhanced photoanodic properties with respect to bare hematite. Electrochemical impedance spectroscopy has contributed to shed light on the mechanisms of photocurrent generation, confirming the reduction of recombination pathways as the main contributor to the improved performances of the functionalized photoelectrodes. Our results highlight the importance of the amorphous catalysts' morphology, as dense and electrolyte impermeable layers hinder the pivotal charge compensation processes at the interface. The direct comparison with all-iron and all-nickel catalytic counterparts further confirms that control over the kinetics of both hole transfer and charge recombination, enabled by the adaptive junction, is key for the optimal operation of this kind of semiconductor/catalyst interfaces.
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Affiliation(s)
- Michele Orlandi
- Department of Physics , University of Trento , Via Sommarive 14 , Povo , Trento I-38123 , Italy
| | - Serena Berardi
- Department of Chemical and Pharmaceutical Sciences , University of Ferrara , Via Fossato di Mortara 17-19 , Ferrara 44100 , Italy
| | - Alberto Mazzi
- Department of Physics , University of Trento , Via Sommarive 14 , Povo , Trento I-38123 , Italy
| | - Stefano Caramori
- Department of Chemical and Pharmaceutical Sciences , University of Ferrara , Via Fossato di Mortara 17-19 , Ferrara 44100 , Italy
| | - Rita Boaretto
- Department of Chemical and Pharmaceutical Sciences , University of Ferrara , Via Fossato di Mortara 17-19 , Ferrara 44100 , Italy
| | - Francesco Nart
- Department of Chemical and Pharmaceutical Sciences , University of Ferrara , Via Fossato di Mortara 17-19 , Ferrara 44100 , Italy
| | - Carlo A Bignozzi
- Department of Chemical and Pharmaceutical Sciences , University of Ferrara , Via Fossato di Mortara 17-19 , Ferrara 44100 , Italy
| | - Nicola Bazzanella
- Department of Physics , University of Trento , Via Sommarive 14 , Povo , Trento I-38123 , Italy
| | - Nainesh Patel
- Department of Physics , University of Mumbai , Vidyanagari, Santacruz (E) , Mumbai 400 098 , India
| | - Antonio Miotello
- Department of Physics , University of Trento , Via Sommarive 14 , Povo , Trento I-38123 , Italy
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50
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Beranek R. Selectivity of Chemical Conversions: Do Light‐Driven Photoelectrocatalytic Processes Hold Special Promise? Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908654] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Radim Beranek
- Institute of ElectrochemistryUlm University Albert-Einstein-Allee 47 89081 Ulm Germany
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