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Attar F, Sharma A, Gupta B, Karuturi S. Statistical Design-Guided Synthesis of Nanoarchitectonics of High-Performance NiFeMoN Electrocatalyst through Facile One-Step Magnetron Sputtering. Adv Sci (Weinh) 2024; 11:e2308063. [PMID: 38282172 PMCID: PMC11005699 DOI: 10.1002/advs.202308063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 01/02/2024] [Indexed: 01/30/2024]
Abstract
This study presents an innovative, statistically-guided magnetron sputtering technique for creating nanoarchitectonics of high-performing, NiFeMoN electrocatalysts for oxygen evolution reaction (OER) in water splitting. Using a central composite face-centered (CCF) design, 13 experimental conditions are identified that enable precise optimization of synthesis parameters through response surface methodology (RSM), confirmed by analysis of variance (ANOVA). The statistical analysis highlighted a interaction between Mo% and N% in the nanostructured NiFeMoN and found optimizing values at 31.35% Mo and 47.12% N. The NiFeMoN catalyst demonstrated superior performance with a low overpotential of 216 mV at 10 mA cm-2 and remarkable stability over seven days, attributed to the modifications in electronic structure and the creation of new active sites through Mo and N additions. Furthermore, the NiFeMoN coating, when used as a protective layer for a Si photoanode in 1 m KOH, achieved an applied-bias photon-to-current efficiency (ABPE) of 5.2%, maintaining stability for 76 h. These advancements underscore the profound potential of employing statistical design for optimizing synthesis parameters of intricate catalyst materials via magnetron sputtering, paving the way for accelerated advancements in water splitting technologies and also in other energy conversion systems, such as nitrogen reduction and CO2 conversion.
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Affiliation(s)
- Farid Attar
- School of EngineeringThe Australian National UniversityCanberraACT2601Australia
| | - Astha Sharma
- School of EngineeringThe Australian National UniversityCanberraACT2601Australia
| | - Bikesh Gupta
- Department of Electronic Materials EngineeringResearch School of PhysicsThe Australian National UniversityCanberraACT2601Australia
| | - Siva Karuturi
- School of EngineeringThe Australian National UniversityCanberraACT2601Australia
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2
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Gupta B, Zhang D, Chen H, Jagadish C, Tan HH, Karuturi S. Ferri-hydrite: A Novel Electron-Selective Contact Layer for InP Photovoltaic and Photoelectrochemical Cells. ACS Appl Mater Interfaces 2023; 15:44912-44920. [PMID: 37712229 DOI: 10.1021/acsami.3c08560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Solar energy conversion devices with charge-selective contacts are attracting significant research interest as a cost-effective alternative to homojunction counterparts. This study presents a novel approach for fabricating high-performance solar cells based on InP heterojunctions using a solution-processed ferri-hydrite (Fh) electron-selective contact (ESC). The champion cell efficiency of 16.6% is achieved, which is a significant improvement over those from previous studies using other solution-processed ESC materials. X-ray photoelectron spectroscopy measurements showed that the low conduction band offset at the Fh-InP interface facilitated selective transport of photogenerated electrons from InP. Moreover, the Fh electron-selective contact layer provided an excellent photoelectrochemical half-cell water reduction efficiency of 8.4%. The Fh layer not only selectively extracts photogenerated electrons from InP but also simultaneously serves as a surface protection layer, improving the cell's long-term stability. These results demonstrate the potential of Fh as a low-cost and easily fabricated material for use in high-efficiency photovoltaic and photoelectrochemical devices. Our findings pave the way for further improvements in the efficiency of InP heterojunction solar cells by addressing the losses incurred in the cells.
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Affiliation(s)
- Bikesh Gupta
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Doudou Zhang
- School of Engineering, The Australian National University, Canberra, ACT 2600, Australia
| | - Hongjun Chen
- Faculty of Science, School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
| | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
- ARC Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Hark Hoe Tan
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
- ARC Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Siva Karuturi
- School of Engineering, The Australian National University, Canberra, ACT 2600, Australia
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Vilasam AGS, Adhikari S, Gupta B, Balendhran S, Higashitarumizu N, Tournet J, Li L, Javey A, Crozier KB, Karuturi S, Jagadish C, Tan HH. Large-area epitaxial growth of InAs nanowires and thin films on hexagonal boron nitride by metal organic chemical vapor deposition. Nanotechnology 2023; 34:495601. [PMID: 37625398 DOI: 10.1088/1361-6528/acf3f1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 08/24/2023] [Indexed: 08/27/2023]
Abstract
Large-area epitaxial growth of III-V nanowires and thin films on van der Waals substrates is key to developing flexible optoelectronic devices. In our study, large-area InAs nanowires and planar structures are grown on hexagonal boron nitride templates using metal organic chemical vapor deposition method without any catalyst or pre-treatments. The effect of basic growth parameters on nanowire yield and thin film morphology is investigated. Under optimised growth conditions, a high nanowire density of 2.1×109cm-2is achieved. A novel growth strategy to achieve uniform InAs thin film on h-BN/SiO2/Si substrate is introduced. The approach involves controlling the growth process to suppress the nucleation and growth of InAs nanowires, while promoting the radial growth of nano-islands formed on the h-BN surface. A uniform polycrystalline InAs thin film is thus obtained over a large area with a dominant zinc-blende phase. The film exhibits near-band-edge emission at room temperature and a relatively high Hall mobility of 399 cm-2/(Vs). This work suggests a promising path for the direct growth of large-area, low-temperature III-V thin films on van der Waals substrates.
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Affiliation(s)
- Aswani Gopakumar Saraswathy Vilasam
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
- ARC Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Sonachand Adhikari
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
- ARC Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Bikesh Gupta
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | | | - Naoki Higashitarumizu
- Electrical Engineering and Computer Sciences, University of California at Berkeley, Berkeley, California, CA, 94720, United States of America
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
| | - Julie Tournet
- School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT 2600, Australia
| | - Lily Li
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Ali Javey
- Electrical Engineering and Computer Sciences, University of California at Berkeley, Berkeley, California, CA, 94720, United States of America
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
| | - Kenneth B Crozier
- School of Physics, The University of Melbourne, Victoria 3010, Parkville, Australia
- Department of Electrical and Electronic Engineering, The University of Melbourne, Victoria 3010, Parkville, Australia
- ARC Centre of Excellence for Transformative Meta-Optical Systems, University of Melbourne, Victoria 3010, Australia
| | - Siva Karuturi
- School of Engineering, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT 2600, Australia
| | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
- ARC Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Hark Hoe Tan
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
- ARC Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
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4
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Soo JZ, Narangari PR, Jagadish C, Tan HH, Karuturi S. Protocol for scalable top-down fabrication of InP nanopillars using a self-assembled random mask technique. STAR Protoc 2023; 4:102237. [PMID: 37083321 PMCID: PMC10148223 DOI: 10.1016/j.xpro.2023.102237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/08/2023] [Accepted: 03/22/2023] [Indexed: 04/22/2023] Open
Abstract
Nanostructured III-V semiconductors are attractive for solar energy conversion applications owing to their excellent light harvesting and optoelectronic properties. Here, we present a protocol for scalable fabrication of III-V semiconductor nanopillars using a simple and cost-effective top-down approach, combining self-assembled random mask and plasma etching techniques. We describe the deposition of Au/SiO2 layers to prepare random etch mask. We then detail the fabrication of nanopillars and photocathodes. Finally, we demonstrate III-V semiconductor nanopillars as a photoelectrode for photoelectrochemical water splitting. For complete details on the use and execution of this protocol, please refer to Narangari et al. (2021).1.
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Affiliation(s)
- Joshua Zheyan Soo
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia.
| | | | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia; ARC Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Hark Hoe Tan
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia; ARC Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Siva Karuturi
- School of Engineering, The Australian National University, Canberra, ACT 2601, Australia.
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Lee Y, Gupta B, Tan HH, Jagadish C, Oh J, Karuturi S. Protocol on the fabrication of monocrystalline thin semiconductor via crack-assisted layer exfoliation technique for photoelectrochemical water-splitting. STAR Protoc 2022; 3:101015. [PMID: 35535167 PMCID: PMC9076963 DOI: 10.1016/j.xpro.2021.101015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Thin semiconductors attract huge interest due to their cost-effective, flexible, lightweight, and semi-transparent properties. Here, we present a protocol on the preparation of thin semiconductor via controlled crack-assisted layer exfoliation technique. The protocol details the fabrication procedure for producing thin monocrystalline semiconductors with thicknesses in the range of a few tens of micrometers from thick donor substrates. In addition, we describe proof-of-concept application of the thin semiconductors for photoelectrochemical water-splitting to produce hydrogen fuel. For complete details on the use and execution of this protocol, please refer to Lee et al. (2021).
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Affiliation(s)
- Yonghwan Lee
- Convergence Materials Research Center, Gumi Electronics and Information Technology Research Institute (GERI), Gumi 39171, Republic of Korea.,Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Bikesh Gupta
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Hark H Tan
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia.,Australian Research Council Center of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia.,Australian Research Council Center of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Jihun Oh
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Siva Karuturi
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia.,School of Engineering, The Australian National University, Canberra, ACT 2601, Australia
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Wang L, Karuturi S, Zan L. Bi 2 S 3 -In 2 S 3 Heterostructures for Efficient Photoreduction of Highly Toxic Cr 6+ Enabled by Facet-Coupling and Z-Scheme Structure. Small 2021; 17:e2101833. [PMID: 34431228 DOI: 10.1002/smll.202101833] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 07/20/2021] [Indexed: 06/13/2023]
Abstract
The construction of Z-scheme photocatalyst materials mimicking the natural photosynthesis system provides many advantages, including increased light harvesting, spatially separated reductive and oxidative active sites and strong redox ability. Here, a novel Bi2 S3 nanorod@In2 S3 nanoparticle heterojunction photocatalyst synthesized through one-pot hydrothermal method for Cr6+ reduction is reported. A systematic investigation of the microstructural and compositional characteristics of the heterojunction catalyst confirms an intimate facet coupling between (440) crystal facet of In2 S3 and (060) crystal facet of Bi2 S3 , which provides a robust heterojunction interface for charge transfer. When tested under visible-light irradiation, the Bi2 S3 -In2 S3 heterojunction photocatalyst with 15% Bi2 S3 loading content achieves the highest Cr6+ photoreduction efficiency of nearly 100% with excellent stability, which is among the best-reported performances for Cr6+ removal. Further examination using optical, photoelectrochemical, impedance spectroscopy, and electron spin resonance spectroscopy characterizations reveal greatly improved photogenerated charge separation and transfer efficiency, and confirm Z-scheme electronic structure of the photocatalyst. The Z-scheme Bi2 S3 -In2 S3 photocatalyst demonstrated here presents promise for the removal of highly toxic Cr6+ , and could also be of interest in photocatalytic energy conversion.
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Affiliation(s)
- Linjuan Wang
- School of Engineering, The Australian National University, Canberra, ACT, 2601, Australia
- College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072, P. R. China
| | - Siva Karuturi
- School of Engineering, The Australian National University, Canberra, ACT, 2601, Australia
- Department of Electronic Materials Engineering, Research School of Physics, the Australian National University, Canberra, ACT, 2601, Australia
| | - Ling Zan
- College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072, P. R. China
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7
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Narangari PR, Butson JD, Tan HH, Jagadish C, Karuturi S. Surface-Tailored InP Nanowires via Self-Assembled Au Nanodots for Efficient and Stable Photoelectrochemical Hydrogen Evolution. Nano Lett 2021; 21:6967-6974. [PMID: 34397217 DOI: 10.1021/acs.nanolett.1c02205] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
With a band gap close to the Shockley-Quiesser limit and excellent conduction band alignment with the water reduction potential, InP is an ideal photocathode material for photoelectrochemical (PEC) water reduction. Here, we develop facile self-assembled Au nanodots based on dewetting phenomena as a masking technique to fabricate wafer-scale InP nanowires (NWs) via a top-down approach. In addition, we report dual-function wet treatment using sulfur-dissolved oleylamine (S-OA) to remove a plasma-damaged surface in a controlled manner and stabilize InP NWs against surface corrosion in harsh electrolyte solutions. The resulting InP NW photocathodes exhibit an excellent photocurrent density of 33 mA/cm2 under 1 sun illumination in 1 M HCl with a highly stabilized performance without needing additional protection layers. Our approach combining large-area NW fabrication and surface engineering synergistically enhances light harvesting and PEC performance and stability, thereby providing a pathway for the development of efficient and durable InP photoelectrodes in a scalable manner.
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Lee Y, Gupta B, Tan HH, Jagadish C, Oh J, Karuturi S. Thin silicon via crack-assisted layer exfoliation for photoelectrochemical water splitting. iScience 2021; 24:102921. [PMID: 34430811 PMCID: PMC8367840 DOI: 10.1016/j.isci.2021.102921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 06/21/2021] [Accepted: 07/27/2021] [Indexed: 11/29/2022] Open
Abstract
Silicon (Si) has been widely investigated as a feasible material for photoelectrochemical (PEC) water splitting. Compared to thick wafer-based Si, thin Si (<50 μm thickness) could concurrently minimize the material usage allowing the development of cost-effective and flexible photoelectrodes for integrable PEC cells. This work presents the design and fabrication of thin Si using crack-assisted layer exfoliation method through detailed optical simulations and a systematic investigation of the exfoliation method. Thin free-standing Si photoanodes with sub-50 μm thickness are demonstrated by incorporating a nickel oxide (NiOx) thin film as oxygen evolution catalyst, light-trapping surface structure, and a rear-pn+ junction, to generate a photo-current density of 23.43 mA/cm2 with an onset potential of 1.2 V (vs. RHE). Our work offers a general approach for the development of efficient and cost-effective photoelectrodes with Si films with important implications for flexible and wearable Si-based photovoltaics and (opto)electronic devices. Design and fabrication of thin Si photoanode using crack-assisted layer exfoliation A systematic investigation of the crack-assisted layer exfoliation method Optical simulation on the dependence of photoelectrochemical performance on Si thickness Demonstration of thin Si photoanode with notable photoelectrochemical performance
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Affiliation(s)
- Yonghwan Lee
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
- Convergence Materials Research Center, Gumi Electronics and Information Technology Research Institute (GERI), Gumi 39171, Republic of Korea
- Corresponding author
| | - Bikesh Gupta
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Hark Hoe Tan
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
- Australian Research Council Center of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
- Australian Research Council Center of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
| | - Jihun Oh
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Siva Karuturi
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
- Research School of Engineering, The Australian National University, Canberra, ACT 2601, Australia
- Corresponding author
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Zhang D, Du M, Wang P, Wang H, Shi W, Gao Y, Karuturi S, Catchpole K, Zhang J, Fan F, Shi J, Liu S. Hole‐Storage Enhanced a‐Si Photocathodes for Efficient Hydrogen Production. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Doudou Zhang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
- School of Materials Science and Engineering Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin 541004 P. R. China
- Research School of Electrical, Energy and Materials Engineering The Australian National University Canberra 2601 Australia
| | - Minyong Du
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Pengpeng Wang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Hui Wang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Wenwen Shi
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Yuying Gao
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Siva Karuturi
- Research School of Electrical, Energy and Materials Engineering The Australian National University Canberra 2601 Australia
| | - Kylie Catchpole
- Research School of Electrical, Energy and Materials Engineering The Australian National University Canberra 2601 Australia
| | - Jian Zhang
- School of Materials Science and Engineering Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin 541004 P. R. China
| | - Fengtao Fan
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Jingying Shi
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
| | - Shengzhong Liu
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Dalian 116023 China
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10
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Zhang D, Du M, Wang P, Wang H, Shi W, Gao Y, Karuturi S, Catchpole K, Zhang J, Fan F, Shi J, Liu S. Hole-Storage Enhanced a-Si Photocathodes for Efficient Hydrogen Production. Angew Chem Int Ed Engl 2021; 60:11966-11972. [PMID: 33590572 DOI: 10.1002/anie.202100078] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Indexed: 11/05/2022]
Abstract
Ferrihydrite (Fh) has been demonstrated as an effective interfacial layer for photoanodes to achieve outstanding photoelectrochemical (PEC) performance for water oxidation reaction owing to its unique hole-storage function. However, it is unknown whether such a hole-storage layer can be used to construct highly efficient photocathodes for hydrogen evolution reaction (HER). In this work, we report Fh interfacial engineering of amorphous silicon photocathode (with nickel as HER cocatalyst) achieving a photocurrent density of 15.6 mA cm-2 at 0 V vs. the reversible hydrogen electrode and a half-cell energy conversion efficiency of 4.08 % in alkaline solution, outperforming most of reported a-Si based photocathodes including multi-junction configurations integrated with noble metal cocatalysts in acid solution. Besides, the photocurrent density is maintained above 14 mA cm-2 for 175 min with 100 % Faradaic efficiency for HER in alkaline solution. Our results demonstrate a feasible approach to construct efficient photocathodes via the application of a hole-storage layer.
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Affiliation(s)
- Doudou Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China.,School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, 541004, P. R. China.,Research School of Electrical, Energy and Materials Engineering, The Australian National University, Canberra, 2601, Australia
| | - Minyong Du
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China
| | - Pengpeng Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China
| | - Hui Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China
| | - Wenwen Shi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China
| | - Yuying Gao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China
| | - Siva Karuturi
- Research School of Electrical, Energy and Materials Engineering, The Australian National University, Canberra, 2601, Australia
| | - Kylie Catchpole
- Research School of Electrical, Energy and Materials Engineering, The Australian National University, Canberra, 2601, Australia
| | - Jian Zhang
- School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, 541004, P. R. China
| | - Fengtao Fan
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China
| | - Jingying Shi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China
| | - Shengzhong Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China
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11
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Kotzin BL, Karuturi S, Chou YK, Lafferty J, Forrester JM, Better M, Nedwin GE, Offner H, Vandenbark AA. Preferential T-cell receptor beta-chain variable gene use in myelin basic protein-reactive T-cell clones from patients with multiple sclerosis. Proc Natl Acad Sci U S A 1991; 88:9161-5. [PMID: 1717998 PMCID: PMC52672 DOI: 10.1073/pnas.88.20.9161] [Citation(s) in RCA: 183] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Multiple sclerosis is an autoimmune disease in which T lymphocytes reactive to myelin basic protein (BP) could play a central role. T cells specific for BP were cloned from the blood of multiple sclerosis patients and normal individuals, and expression of T-cell receptor variable region genes was analyzed. A remarkable bias for use of beta-chain variable region (V beta) 5.2 and, to a lesser extent, V beta 6.1 was seen among BP-specific clones from patients but not from controls. The preferential use of V beta 5.2 for BP recognition did not reflect altered expression of this V beta in the peripheral repertoire. Interestingly, shared V beta 5.2 usage was apparent for clones specific for different BP determinants, even when derived from the same individual. The concurrent demonstration by others (J. R. Oksenberg, M. A. Panzara, A. B. Begovich, H. Erlich, R. Murray, M. Sherritt, S. Stuart, C. C. Bernard, and L. Steinman, personal communication) that T cells within demyelinating areas of multiple sclerosis brains preferentially express V beta 5.2 and V beta 6.1 suggests that the BP-specific clones derived from blood may be relevant to disease pathogenesis. These findings may have important implications for the treatment of multiple sclerosis.
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Affiliation(s)
- B L Kotzin
- Department of Pediatrics, National Jewish Center for Immunology and Respiratory Medicine, Denver, CO 80206
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