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Chaudhary S, Hassan MA, Kim MJ, Jung WG, Ha JS, Moon WJ, Ryu SW, Kim BJ. SnS 2 Nanoparticles Embedded in BiVO 4 Surfaces via Eutectic Decomposition for Enhanced Performance in Photoelectrochemical Water Splitting. SMALL METHODS 2024:e2400794. [PMID: 39246134 DOI: 10.1002/smtd.202400794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 08/19/2024] [Indexed: 09/10/2024]
Abstract
BiVO4 has garnered substantial interest as a promising photoanode material for photoelectrochemical water-splitting due to its narrow band gap and appropriate band edge positions for water oxidation. Nevertheless, its practical use has been impeded by poor charge transport and sluggish water oxidation kinetics. Here, a hybrid composite photoanode is fabricated by uniformly embedding SnS2 nanoparticles near the surface of a BiVO4 thin film, creating a type II heterostructure with strong interactions between the nanoparticles and the film for efficient charge separation. This structure forms via eutectic melting during atomic layer deposition of SnS2 with subsequent phase separation between SnS2 and BiVO4 at room temperature, offering greater advantages and flexibilities over conventional exsolution techniques. Furthermore, the SnS2/BiVO4 hybrid composite is coated with a thin amorphous ZnS passivation layer to accelerate charge transfer process and enhance long-term stability. The optimized BiVO4/SnS2/ZnS photoanode exhibits a photocurrent density of 5.44 mA cm-2 at 1.23 V versus RHE, which is 2.73 times higher than that of the BiVO4 photoanode, and a dramatic improvement in photostability retention at 1.23 V versus RHE, increasing from 55% to 91% over 24 hours. This method of anchoring nanoparticles onto host materials proves highly valuable for energy and environmental applications.
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Affiliation(s)
- Surekha Chaudhary
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro Buk-gu, Gwangju, 61005, South Korea
| | - Mostafa Afifi Hassan
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro Buk-gu, Gwangju, 61005, South Korea
- Department of Physics, Faculty of Science, New Valley University, El-Kharja, 72511, Egypt
| | - Myeong-Jin Kim
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro Buk-gu, Gwangju, 61005, South Korea
| | - Wan-Gil Jung
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro Buk-gu, Gwangju, 61005, South Korea
- Korea Basic Science Institute, Gwangju, 61186, South Korea
| | - Jun-Seok Ha
- School of Chemical Engineering, Chonnam National University, Gwangju, 61186, South Korea
| | - Won-Jin Moon
- Korea Basic Science Institute, Gwangju, 61186, South Korea
| | - Sang-Wan Ryu
- Department of Physics, Chonnam National University, Gwangju, 61186, South Korea
| | - Bong-Joong Kim
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro Buk-gu, Gwangju, 61005, South Korea
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Kousi K, Tang C, Metcalfe IS, Neagu D. Emergence and Future of Exsolved Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2006479. [PMID: 33787009 DOI: 10.1002/smll.202006479] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 01/29/2021] [Indexed: 06/12/2023]
Abstract
Supported nanoparticle systems have received increased attention over the last decades because of their potential for high activity levels when applied to chemical conversions, although, because of their nanoscale nature, they tend to exhibit problems with long-term durability. Over the last decade, the discovery of the so-called exsolution concept has addressed many of these challenges and opened many other opportunities to material design by providing a relatively simple, single-step, synthetic pathway to produce supported nanoparticles that combine high stability against agglomeration and poisoning with high activity across multiple areas of application. Here, the trends that define the development of the exsolution concept are reviewed in terms of design, functionality, tunability, and applicability. To support this, the number of studies dedicated to both fundamental and application-related studies, as well as the types of metallic nanoparticles and host or support lattices employed, are examined. Exciting future directions of research are also highlighted.
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Affiliation(s)
- Kalliopi Kousi
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Chenyang Tang
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Ian S Metcalfe
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Dragos Neagu
- Department of Process and Chemical Engineering, University of Strathclyde, Glasgow, G1 1XL, UK
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Progress in Material Development for Low-Temperature Solid Oxide Fuel Cells: A Review. ENERGIES 2021. [DOI: 10.3390/en14051280] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Solid oxide fuel cells (SOFCs) have been considered as promising candidates to tackle the need for sustainable and efficient energy conversion devices. However, the current operating temperature of SOFCs poses critical challenges relating to the costs of fabrication and materials selection. To overcome these issues, many attempts have been made by the SOFC research and manufacturing communities for lowering the operating temperature to intermediate ranges (600–800 °C) and even lower temperatures (below 600 °C). Despite the interesting success and technical advantages obtained with the low-temperature SOFC, on the other hand, the cell operation at low temperature could noticeably increase the electrolyte ohmic loss and the polarization losses of the electrode that cause a decrease in the overall cell performance and energy conversion efficiency. In addition, the electrolyte ionic conductivity exponentially decreases with a decrease in operating temperature based on the Arrhenius conduction equation for semiconductors. To address these challenges, a variety of materials and fabrication methods have been developed in the past few years which are the subject of this critical review. Therefore, this paper focuses on the recent advances in the development of new low-temperature SOFCs materials, especially low-temperature electrolytes and electrodes with improved electrochemical properties, as well as summarizing the matching current collectors and sealants for the low-temperature region. Different strategies for improving the cell efficiency, the impact of operating variables on the performance of SOFCs, and the available choice of stack designs, as well as the costing factors, operational limits, and performance prospects, have been briefly summarized in this work.
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Lu C, Niu B, Yi W, Ji Y, Xu B. Efficient symmetrical electrodes of PrBaFe2-Co O5+δ (x=0, 0.2,0.4) for solid oxide fuel cells and solid oxide electrolysis cells. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136916] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Li J, Wei B, Yue X, Su C, Lü Z. Investigations on sulfur poisoning mechanisms of a solid oxide fuel cell with niobium-doped ferrate perovskite anode. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135703] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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