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Fu H, Bai Y, Lian Y, Hu Y, Zhao J, Zhang H. Oxygen-Deficient FeNbO 4-x In-Situ Growth in Honey-Derived N-Doping Porous Carbon for Overall Water Splitting. CHEMSUSCHEM 2024; 17:e202400162. [PMID: 38556462 DOI: 10.1002/cssc.202400162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/12/2024] [Accepted: 03/29/2024] [Indexed: 04/02/2024]
Abstract
It is still a great challenge to reasonably design green, low cost, high activity and good stability catalysts for overall water splitting (OWS). Here, we introduce a novel catalyst with ferric niobate (FeNbO4) in-situ growing in honey-derived porous carbon of high specific surface area, and its catalytic activity is further enhanced by micro-regulation (oxygen vacancy and N-doping). From the experimental results and density functional theory (DFT) calculations, the oxygen vacancy in catalyst FeNbO4-x@NC regulates the local charge density of active site, thus increasing conductivity and optimizing hydrogen/oxygen species adsorption energy. FeNbO4 in-situ grows within N-doping honey-derived porous carbon, which can enhance active specific surface area exposure, strengthen gaseous substances escape rate, and accelerate electrons/ions transfer and electrolytes diffusion. Moreover, in-situ Raman also confirms O-species generation in oxygen evolution reaction (OER). As a result, the catalyst FeNbO4-x@NC shows good electrochemical performance in OER, HER and OWS.
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Affiliation(s)
- Hongliang Fu
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, 225002, PR China
| | - Yongqing Bai
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, 225002, PR China
| | - Yue Lian
- School of Chemistry & Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, P. R. China
| | - Yongfeng Hu
- Department of Chemical Engineering, University of Saskatchewan, Saskatoon, S7N 2V3, Canada
| | - Jing Zhao
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, 225002, PR China
| | - Huaihao Zhang
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, 225002, PR China
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Malashin I, Daibagya D, Tynchenko V, Gantimurov A, Nelyub V, Borodulin A. Predicting Diffusion Coefficients in Nafion Membranes during the Soaking Process Using a Machine Learning Approach. Polymers (Basel) 2024; 16:1204. [PMID: 38732673 PMCID: PMC11085799 DOI: 10.3390/polym16091204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 04/18/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
Nafion, a versatile polymer used in electrochemistry and membrane technologies, exhibits complex behaviors in saline environments. This study explores Nafion membrane's IR spectra during soaking and subsequent drying processes in salt solutions at various concentrations. Utilizing the principles of Fick's second law, diffusion coefficients for these processes are derived via exponential approximation. By harnessing machine learning (ML) techniques, including the optimization of neural network hyperparameters via a genetic algorithm (GA) and leveraging various regressors, we effectively pinpointed the optimal model for predicting diffusion coefficients. Notably, for the prediction of soaking coefficients, our model is composed of layers with 64, 64, 32, and 16 neurons, employing ReLU, ELU, sigmoid, and ELU activation functions, respectively. Conversely, for drying coefficients, our model features two hidden layers with 16 and 12 neurons, utilizing sigmoid and ELU activation functions, respectively.
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Affiliation(s)
- Ivan Malashin
- Artificial Intelligence Technology Scientific and Education Center, Bauman Moscow State Technical University, 105005 Moscow, Russia (A.G.); (V.N.); (A.B.)
| | - Daniil Daibagya
- Artificial Intelligence Technology Scientific and Education Center, Bauman Moscow State Technical University, 105005 Moscow, Russia (A.G.); (V.N.); (A.B.)
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Vadim Tynchenko
- Artificial Intelligence Technology Scientific and Education Center, Bauman Moscow State Technical University, 105005 Moscow, Russia (A.G.); (V.N.); (A.B.)
| | - Andrei Gantimurov
- Artificial Intelligence Technology Scientific and Education Center, Bauman Moscow State Technical University, 105005 Moscow, Russia (A.G.); (V.N.); (A.B.)
| | - Vladimir Nelyub
- Artificial Intelligence Technology Scientific and Education Center, Bauman Moscow State Technical University, 105005 Moscow, Russia (A.G.); (V.N.); (A.B.)
- Scientific Department, Far Eastern Federal University, 690922 Vladivostok, Russia
| | - Aleksei Borodulin
- Artificial Intelligence Technology Scientific and Education Center, Bauman Moscow State Technical University, 105005 Moscow, Russia (A.G.); (V.N.); (A.B.)
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Jo SG, Ramkumar R, Lee JW. Recent Advances in Laser-Induced Graphene-Based Materials for Energy Storage and Conversion. CHEMSUSCHEM 2024; 17:e202301146. [PMID: 38057133 DOI: 10.1002/cssc.202301146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/10/2023] [Indexed: 12/08/2023]
Abstract
Laser-induced graphene (LIG) is a porous carbon nanomaterial that can be produced by irradiation of CO2 laser directly on the polymer substrate under ambient conditions. LIG has many merits over conventional graphene, such as simple and fast synthesis, tunable structure and composition, high surface area and porosity, excellent electrical and thermal conductivity, and good flexibility and stability. These properties make LIG a promising material for energy applications, such as supercapacitors, batteries, fuel cells, and solar cells. In this review, we highlight the recent advances of LIG in energy materials, covering the fabrication methods, performance enhancement strategies, and device integration of LIG-based electrodes and devices in the area of hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, zinc-air batteries, and supercapacitors. This comprehensive review examines the potential of LIG for future sustainable and efficient energy material development, highlighting its versatility and multifunctionality in energy conversion.
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Affiliation(s)
- Seung Geun Jo
- Department of Materials Science and Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Rahul Ramkumar
- Department of Materials Science and Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Jung Woo Lee
- Department of Materials Science and Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
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Zheng Y, Mou Y, Wang Y, Wan J, Yao G, Feng C, Sun Y, Dai L, Zhang H, Wang Y. Aluminum-incorporation activates vanadium carbide with electron-rich carbon sites for efficient pH-universal hydrogen evolution reaction. J Colloid Interface Sci 2023; 656:367-375. [PMID: 37995406 DOI: 10.1016/j.jcis.2023.11.106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/16/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023]
Abstract
Vanadium carbide (VC) is the greatest potential hydrogen evolution reaction (HER) catalyst because of its platinum-like property and abundant earth reserves. However, it exhibits insufficient catalytic performance due to the unfavorable interaction of reaction intermediates with catalysts. In this work, using NH4VO3 as the main raw material, the flow ratio of CH4 to Ar was accurately controlled, and a non-transition metal Al-doped into VC (100) nano-flowers with carbon hybrids on nickel foams (Al-VC@C/NF) was prepared for the first time as a high-efficiency HER catalyst by chemical vapor carbonization. The overpotential of Al-VC@C/NF catalysts in 0.5 M H2SO4 and 1 M KOH at a current density of 10 mA cm-2 are only 58 mV and 97 mV, respectively, which are the best HER performance among non-noble metal vanadium carbide based catalysts. Simultaneously, Al-VC@C/NF exhibits small Tafel slope (45 mV dec-1 and 73 mV dec-1) and excellent stability in acidic and alkaline media. Theoretical calculations demonstrate that doped Al atoms can induce electron redistribution on the vanadium carbide surface to form electron-rich carbon sites, which significantly reduces the energy barrier during the HER process. This work provides a new tactic to modulate vanadium-based carbons as efficient HER catalysts through non-transition metal doping.
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Affiliation(s)
- Yanan Zheng
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China.
| | - Yiwei Mou
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China.
| | - Yanwei Wang
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China.
| | - Jin Wan
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China.
| | - Guangxu Yao
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China
| | - Chuanzhen Feng
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China
| | - Yue Sun
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China
| | - Longhua Dai
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China
| | - Huijuan Zhang
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China; College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhehaote, 010022, PR China.
| | - Yu Wang
- The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044, PR China; College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhehaote, 010022, PR China.
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Amiri M, Dondapati J, Quintal J, Chen A. Sodium Hexa-Titanate Nanowires Modified with Cobalt Hydroxide Quantum Dots as an Efficient and Cost-Effective Electrocatalyst for Hydrogen Evolution in Alkaline Media. ACS APPLIED MATERIALS & INTERFACES 2022; 14:40021-40030. [PMID: 36006793 DOI: 10.1021/acsami.2c11310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A novel electrocatalyst with high activity and enhanced durability toward the hydrogen evolution reaction (HER) in alkaline media has been designed and fabricated based on sodium hexa-titanate (Na2Ti6O13) nanowires synthesized by a hydrothermal process and modified with Co(OH)2 quantum dots (QDs) by a facile chemical bath deposition (CBD) method. The current response of the developed Ti/Na2Ti6O13/Co(OH)2 nanocomposite electrode attained 10 mA cm-2 at an overpotential of 159 mV. The nanocomposite electrode exhibited a high stability at an applied current of 100 mA cm-2. The remarkable catalytic behavior was achieved with a loading amount of ca. 0.06 mg cm-2 cobalt hydroxide. This is attributed to the high electrochemically active surface area (EASA) gained by the nanowire-structured substrate and considerable enhancement of electrochemical conductivity with the use of Co(OH)2 quantum dots as an active material. The superior catalytic activity and high stability show that the developed catalyst is a promising candidate for hydrogen production in alkaline media.
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Affiliation(s)
- Mona Amiri
- Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada
| | - Jesse Dondapati
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1, Canada
| | - Jonathan Quintal
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1, Canada
| | - Aicheng Chen
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1, Canada
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