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Saqib QM, Ahmad I, Mannan A, Mahmood J, Ameen S, Patil CS, Noman M, Kim J, Okyay MS, Patil SR, Ko Y, Noh HJ, Wong BM, Kim B, Bae J, Baek JB. Triboelectric Energy Harvesting from Highly Conjugated Fused Aromatic Ladder Structure Under Extreme Environmental Conditions. Adv Mater 2024; 36:e2311029. [PMID: 38299366 DOI: 10.1002/adma.202311029] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 01/10/2024] [Indexed: 02/02/2024]
Abstract
Practical application of triboelectric nanogenerators (TENGs) has been challenging, particularly, under harsh environmental conditions. This work proposes a novel 3D-fused aromatic ladder (FAL) structure as a tribo-positive material for TENGs, to address these challenges. The 3D-FAL offers a unique materials engineering platform for tailored properties, such as high specific surface area and porosity, good thermal and mechanical stability, and tunable electronic properties. The fabricated 3D-FAL-based TENG reaches a maximum peak power density of 451.2 µW cm-2 at 5 Hz frequency. More importantly, the 3D-FAL-based TENG maintains stable output performance under harsh operating environments, over wide temperature (-45-100 °C) and humidity ranges (8.3-96.7% RH), representing the development of novel FAL for sustainable energy generation under challenging environmental conditions. Furthermore, the 3D-FAL-based TENG proves to be a promising device for a speed monitoring system engaging reconstruction in virtual reality in a snowy environment.
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Affiliation(s)
- Qazi Muhammad Saqib
- Department of Ocean System Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Ishfaq Ahmad
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
- POLYMAT, University of the Basque Country UPV/EHU, Avenida de Tolosa 72, 20018 Donostia-San, Sebastian, 20018, Spain
| | - Abdul Mannan
- Department of Physics, University of Management and Technology, Lahore, 54770, Pakistan
| | - Javeed Mahmood
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
- Oxide & Organic Nanomaterials for Energy & Environment (ONE) Laboratory, Chemistry Program; Advanced Membranes & Porous Materials (AMPM) Center; KAUST Catalysis Center (KCC); Physical Science & Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
| | - Shahid Ameen
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Chandrashekhar S Patil
- Department of Ocean System Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Muhammad Noman
- Department of Ocean System Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Jungmin Kim
- Department of Ocean System Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Mahmut Sait Okyay
- Materials Science & Engineering Program, Department of Chemistry, University of California-Riverside, Riverside, CA, 92521, USA
| | - Swapnil R Patil
- Department of Ocean System Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Youngbin Ko
- Department of Ocean System Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Hyuk-Jun Noh
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Bryan M Wong
- Materials Science & Engineering Program, Department of Chemistry, University of California-Riverside, Riverside, CA, 92521, USA
| | - BongSoo Kim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jinho Bae
- Department of Ocean System Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Jong-Beom Baek
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
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Xu Q, Del Ben M, Sait Okyay M, Choi M, Ibrahim KZ, Wong BM. Velocity-Gauge Real-Time Time-Dependent Density Functional Tight-Binding for Large-Scale Condensed Matter Systems. J Chem Theory Comput 2023; 19:7989-7997. [PMID: 37955975 PMCID: PMC10688181 DOI: 10.1021/acs.jctc.3c00689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Indexed: 11/15/2023]
Abstract
We present a new velocity-gauge real-time, time-dependent density functional tight-binding (VG-rtTDDFTB) implementation in the open-source DFTB+ software package (https://dftbplus.org) for probing electronic excitations in large, condensed matter systems. Our VG-rtTDDFTB approach enables real-time electron dynamics simulations of large, periodic, condensed matter systems containing thousands of atoms with a favorable computational scaling as a function of system size. We provide computational details and benchmark calculations to demonstrate its accuracy and computational parallelizability on a variety of large material systems. As a representative example, we calculate laser-induced electron dynamics in a 512-atom amorphous silicon supercell to highlight the large periodic systems that can be examined with our implementation. Taken together, our VG-rtTDDFTB approach enables new electron dynamics simulations of complex systems that require large periodic supercells, such as crystal defects, complex surfaces, nanowires, and amorphous materials.
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Affiliation(s)
- Qiang Xu
- Materials
Science & Engineering Program, Department of
Chemistry, and Department of Physics & Astronomy, University of California−Riverside, Riverside, California 92521, United States
| | - Mauro Del Ben
- Applied
Mathematics & Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Mahmut Sait Okyay
- Materials
Science & Engineering Program, Department of
Chemistry, and Department of Physics & Astronomy, University of California−Riverside, Riverside, California 92521, United States
| | - Min Choi
- Materials
Science & Engineering Program, Department of
Chemistry, and Department of Physics & Astronomy, University of California−Riverside, Riverside, California 92521, United States
| | - Khaled Z. Ibrahim
- Applied
Mathematics & Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Bryan M. Wong
- Materials
Science & Engineering Program, Department of
Chemistry, and Department of Physics & Astronomy, University of California−Riverside, Riverside, California 92521, United States
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Kim SW, Jung H, Okyay MS, Noh HJ, Chung S, Kim YH, Jeon JP, Wong BM, Cho K, Seo JM, Yoo JW, Baek JB. Hexaazatriphenylene-Based Two-Dimensional Conductive Covalent Organic Framework with Anisotropic Charge Transfer. Angew Chem Int Ed Engl 2023; 62:e202310560. [PMID: 37654107 DOI: 10.1002/anie.202310560] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/02/2023]
Abstract
The development of covalent organic frameworks (COFs) with efficient charge transport is of immense interest for applications in optoelectronic devices. To enhance COF charge transport properties, electroactive building blocks and dopants can be used to induce extended conduction channels. However, understanding their intricate interplay remains challenging. We designed and synthesized a tailor-made COF structure with electroactive hexaazatriphenylene (HAT) core units and planar dioxin (D) linkages, denoted as HD-COF. With the support of theoretical calculations, we found that the HAT units in the HD-COF induce strong, eclipsed π-π stacking. The unique stacking of HAT units and the weak in-plane conjugation of dioxin linkages leads to efficient anisotropic charge transport. We fabricated HD-COF films to minimize the grain boundary effect of bulk COFs, which resulted in enhanced conductivity. As a result, the HD-COF films showed an electrical conductivity as high as 1.25 S cm-1 after doping with tris(4-bromophenyl)ammoniumyl hexachloroantimonate.
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Affiliation(s)
- Seong-Wook Kim
- Department of Energy and Chemical Engineering/, Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Hyeonjung Jung
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Mahmut Sait Okyay
- Materials Science & Engineering Program, Department of Chemistry, and Department of Physics & Astronomy, University of California-Riverside, Riverside, CA, 92521, USA
| | - Hyuk-Jun Noh
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - Sein Chung
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Young Hyun Kim
- Department of Energy and Chemical Engineering/, Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jong-Pil Jeon
- Department of Energy and Chemical Engineering/, Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Bryan M Wong
- Materials Science & Engineering Program, Department of Chemistry, and Department of Physics & Astronomy, University of California-Riverside, Riverside, CA, 92521, USA
| | - Kilwon Cho
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Jeong-Min Seo
- Department of Energy and Chemical Engineering/, Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jung-Woo Yoo
- School of Materials Science and Engineering/, Graduate School of Semiconductor Materials and Devices, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jong-Beom Baek
- Department of Energy and Chemical Engineering/, Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
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Shin D, Tancogne-Dejean N, Zhang J, Okyay MS, Rubio A, Park N. Shin et al. Reply. Phys Rev Lett 2023; 131:059602. [PMID: 37595213 DOI: 10.1103/physrevlett.131.059602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 05/18/2023] [Indexed: 08/20/2023]
Affiliation(s)
- Dongbin Shin
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761, Hamburg, Germany
- Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Nicolas Tancogne-Dejean
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Jin Zhang
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Mahmut Sait Okyay
- Materials Science & Engineering Program, Department of Chemical & Environmental Engineering, Department of Physics & Astronomy, and Department of Chemistry, University of California-Riverside, Riverside, 92521, California, USA
| | - Angel Rubio
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761, Hamburg, Germany
- Nano-Bio Spectroscopy Group, Departamento de Fsica de Materiales, Universidad del Pas Vasco, 20018 San Sebastian, Spain
- Center for Computational Quantum Physics (CCQ), The Flatiron Institute, 162 Fifth avenue, New York New York 10010, USA
| | - Noejung Park
- Department of Physics, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan 44919, Korea
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Noh HJ, Chung S, Okyay MS, Im YK, Kim SW, Kweon DH, Jeon JP, Seo JM, Kim NH, Yu SY, Reo Y, Noh YY, Kang B, Park N, Mahmood J, Cho K, Baek JB. Hydrophenazine-linked two-dimensional ladder-type crystalline fused aromatic network with high charge transport. Chem 2022. [DOI: 10.1016/j.chempr.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shin D, Tancogne-Dejean N, Zhang J, Okyay MS, Rubio A, Park N. Erratum: Identification of the Mott Insulating Charge Density Wave State in 1T-TaS_{2} [Phys. Rev. Lett. 126, 196406 (2021)]. Phys Rev Lett 2022; 128:029902. [PMID: 35089779 DOI: 10.1103/physrevlett.128.029902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Indexed: 06/14/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.126.196406.
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Shin D, Tancogne-Dejean N, Zhang J, Okyay MS, Rubio A, Park N. Identification of the Mott Insulating Charge Density Wave State in 1T-TaS_{2}. Phys Rev Lett 2021; 126:196406. [PMID: 34047618 DOI: 10.1103/physrevlett.126.196406] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
We investigate the low-temperature charge density wave (CDW) state of bulk TaS_{2} with a fully self-consistent density-functional theory with the Hubbard U potential, over which the controversy has remained unresolved regarding the out-of-plane metallic band. By examining the innate structure of the Hubbard U potential, we reveal that the conventional use of atomic-orbital basis could seriously misevaluate the electron correlation in the CDW state. By adopting a generalized basis, covering the whole David star, we successfully reproduce the Mott insulating nature with the layer-by-layer antiferromagnetic order. Similar consideration should be applied for description of the electron correlation in molecular solid.
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Affiliation(s)
- Dongbin Shin
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Nicolas Tancogne-Dejean
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Jin Zhang
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Mahmut Sait Okyay
- Department of Physics, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan 44919, Korea
| | - Angel Rubio
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
- Nano-Bio Spectroscopy Group, Departamento de Fsica de Materiales, Universidad del Pas Vasco, 20018 San Sebastian, Spain
- Center for Computational Quantum Physics (CCQ), The Flatiron Institute, 162 Fifth Avenue, New York, New York 10010, USA
| | - Noejung Park
- Department of Physics, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan 44919, Korea
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Kweon DH, Okyay MS, Kim SJ, Jeon JP, Noh HJ, Park N, Mahmood J, Baek JB. Ruthenium anchored on carbon nanotube electrocatalyst for hydrogen production with enhanced Faradaic efficiency. Nat Commun 2020; 11:1278. [PMID: 32152312 PMCID: PMC7062887 DOI: 10.1038/s41467-020-15069-3] [Citation(s) in RCA: 138] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 02/12/2020] [Indexed: 11/09/2022] Open
Abstract
Developing efficient and stable electrocatalysts is crucial for the electrochemical production of pure and clean hydrogen. For practical applications, an economical and facile method of producing catalysts for the hydrogen evolution reaction (HER) is essential. Here, we report ruthenium (Ru) nanoparticles uniformly deposited on multi-walled carbon nanotubes (MWCNTs) as an efficient HER catalyst. The catalyst exhibits the small overpotentials of 13 and 17 mV at a current density of 10 mA cm-2 in 0.5 M aq. H2SO4 and 1.0 M aq. KOH, respectively, surpassing the commercial Pt/C (16 mV and 33 mV). Moreover, the catalyst has excellent stability in both media, showing almost "zeroloss" during cycling. In a real device, the catalyst produces 15.4% more hydrogen per power consumed, and shows a higher Faradaic efficiency (92.28%) than the benchmark Pt/C (85.97%). Density functional theory calculations suggest that Ru-C bonding is the most plausible active site for the HER.
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Affiliation(s)
- Do Hyung Kweon
- School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea
| | - Mahmut Sait Okyay
- School of Natural Science Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea
| | - Seok-Jin Kim
- School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea
| | - Jong-Pil Jeon
- School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea
| | - Hyuk-Jun Noh
- School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea
| | - Noejung Park
- School of Natural Science Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea
| | - Javeed Mahmood
- School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea.
| | - Jong-Beom Baek
- School of Energy and Chemical Engineering / Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea.
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Lee HH, Lee JB, Park Y, Park KH, Okyay MS, Shin DS, Kim S, Park J, Park N, An BK, Jung YS, Lee HW, Lee KT, Hong SY. Coordination Polymers for High-Capacity Li-Ion Batteries: Metal-Dependent Solid-State Reversibility. ACS Appl Mater Interfaces 2018; 10:22110-22118. [PMID: 29901390 DOI: 10.1021/acsami.8b04678] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Electrode materials exploiting multielectron-transfer processes are essential components for large-scale energy storage systems. Organic-based electrode materials undergoing distinct molecular redox transformations can intrinsically circumvent the structural instability issue of conventional inorganic-based host materials associated with lattice volume expansion and pulverization. Yet, the fundamental mechanistic understanding of metal-organic coordination polymers toward the reversible electrochemical processes is still lacking. Herein, we demonstrate that metal-dependent spatial proximity and binding affinity play a critical role in the reversible redox processes, as verified by combined 13C solid-state NMR, X-ray absorption spectroscopy, and transmission electron microscopy. During the electrochemical lithiation, in situ generated metallic nanoparticles dispersed in the organic matrix generate electrically conductive paths, synergistically aiding subsequent multielectron transfer to π-conjugated ligands. Comprehensive screening on 3d-metal-organic coordination polymers leads to a high-capacity electrode material, cobalt-2,5-thiophenedicarboxylate, which delivers a stable specific capacity of ∼1100 mA h g-1 after 100 cycles.
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Affiliation(s)
| | | | - Yuwon Park
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 599 Gwanangno , Gwanak-gu, Seoul 151-744 , Republic of Korea
| | - Kern Ho Park
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 599 Gwanangno , Gwanak-gu, Seoul 151-744 , Republic of Korea
| | | | | | | | | | | | - Byeong-Kwan An
- Department of Chemistry , The Catholic University of Korea , Bucheon-si , Geyonggi-do 420-753 , Republic of Korea
| | | | | | - Kyu Tae Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 599 Gwanangno , Gwanak-gu, Seoul 151-744 , Republic of Korea
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Li F, Zhao X, Mahmood J, Okyay MS, Jung SM, Ahmad I, Kim SJ, Han GF, Park N, Baek JB. Macroporous Inverse Opal-like Mo xC with Incorporated Mo Vacancies for Significantly Enhanced Hydrogen Evolution. ACS Nano 2017; 11:7527-7533. [PMID: 28692795 DOI: 10.1021/acsnano.7b04205] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The hydrogen evolution reaction (HER) is one of the most important pathways for producing pure and clean hydrogen. Although platinum (Pt) is the most efficient HER electrocatalyst, its practical application is significantly hindered by high-cost and scarcity. In this work, an MoxC with incorporated Mo vacancies and macroporous inverse opal-like (IOL) structure (MoxC-IOL) was synthesized and studied as a low-cost efficient HER electrocatalyst. The macroporous IOL structure was controllably fabricated using a facile-hard template strategy. As a result of the combined benefits of the Mo vacancies and structural advantages, including appropriate hydrogen binding energy, large exposed surface, robust IOL structure and fast mass/charge transport, the synthesized MoxC-IOL exhibited significantly enhanced HER electrocatalytic performance with good stability, with performance comparable or superior to Pt wire in both acidic and alkaline solutions.
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Affiliation(s)
| | - Xianglong Zhao
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, P. R. China
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Mahmood J, Li F, Jung SM, Okyay MS, Ahmad I, Kim SJ, Park N, Jeong HY, Baek JB. An efficient and pH-universal ruthenium-based catalyst for the hydrogen evolution reaction. Nat Nanotechnol 2017; 12:441-446. [PMID: 28192390 DOI: 10.1038/nnano.2016.304] [Citation(s) in RCA: 574] [Impact Index Per Article: 82.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 12/14/2016] [Indexed: 05/27/2023]
Abstract
The hydrogen evolution reaction (HER) is a crucial step in electrochemical water splitting and demands an efficient, durable and cheap catalyst if it is to succeed in real applications. For an energy-efficient HER, a catalyst must be able to trigger proton reduction with minimal overpotential and have fast kinetics. The most efficient catalysts in acidic media are platinum-based, as the strength of the Pt-H bond is associated with the fastest reaction rate for the HER. The use of platinum, however, raises issues linked to cost and stability in non-acidic media. Recently, non-precious-metal-based catalysts have been reported, but these are susceptible to acid corrosion and are typically much inferior to Pt-based catalysts, exhibiting higher overpotentials and lower stability. As a cheaper alternative to platinum, ruthenium possesses a similar bond strength with hydrogen (∼65 kcal mol-1), but has never been studied as a viable alternative for a HER catalyst. Here, we report a Ru-based catalyst for the HER that can operate both in acidic and alkaline media. Our catalyst is made of Ru nanoparticles dispersed within a nitrogenated holey two-dimensional carbon structure (Ru@C2N). The Ru@C2N electrocatalyst exhibits high turnover frequencies at 25 mV (0.67 H2 s-1 in 0.5 M H2SO4 solution; 0.75 H2 s-1 in 1.0 M KOH solution) and small overpotentials at 10 mA cm-2 (13.5 mV in 0.5 M H2SO4 solution; 17.0 mV in 1.0 M KOH solution) as well as superior stability in both acidic and alkaline media. These performances are comparable to, or even better than, the Pt/C catalyst for the HER.
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Affiliation(s)
- Javeed Mahmood
- School of Energy and Chemical Engineering, Centre for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
| | - Feng Li
- School of Energy and Chemical Engineering, Centre for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
| | - Sun-Min Jung
- School of Energy and Chemical Engineering, Centre for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
| | - Mahmut Sait Okyay
- School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
| | - Ishfaq Ahmad
- School of Energy and Chemical Engineering, Centre for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
| | - Seok-Jin Kim
- School of Energy and Chemical Engineering, Centre for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
| | - Noejung Park
- School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
| | - Hu Young Jeong
- UNIST Central Research Facilities, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
| | - Jong-Beom Baek
- School of Energy and Chemical Engineering, Centre for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan 44919, South Korea
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