1
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Zubaid S, Khan J, Sherazi TA. The influence of nanostructure and electrolyte concentration on the performance of nickel sulfide (Ni 3S 2) catalyst for electrochemical overall water splitting. J Colloid Interface Sci 2024; 660:502-512. [PMID: 38252992 DOI: 10.1016/j.jcis.2024.01.118] [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: 09/20/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 01/24/2024]
Abstract
Developing non-precious nanostructured electrocatalysts, exhibiting high catalytic activity in combination with excellent stability, has an enormous potential to replace noble-metal-based catalysts for Hydrogen production through electrochemical water splitting. In this study, a facile method is used for the synthesis of three different hierarchical nanostructures of nickel sulfide (Ni3S2) including nanosheets, nanorods, and multiconnected nanorods that are directly grown on 3D nickel foam (NF). These nanostructured electrocatalysts are evaluated for electrochemical water splitting in alkaline media using four different concentrations to understand the effect of nanostructure and ion concentration on the efficiency. Among different combinations of structure and electrolyte concentration, the Ni3S2 in the form of nanosheets exhibited the best electrocatalytic performance for hydrogen evolution reaction (HER) as well as oxygen evolution reaction (OER) in 3.0 M alkaline solution. The hierarchical Ni3S2 nanosheets exhibited a high electrochemically active surface area, which facilitated the charge transport phenomenon along the electrode-electrolyte interface in a higher electrolyte concentration that improved the reaction kinetics so as overall water splitting. The developed Ni3S2 nanosheets required an overpotential of 110 mV (@10 mA cm-2) and 211 mV (@100 mA cm-2) for HER and OER, respectively in 3.0 M electrolyte concentration. This work provides insight into how the materials' nanostructures and electrolyte concentration could be utilized to improve the electrocatalytic performance for an overall water-splitting process, and the concept could be applied for material designing and conditions optimization for other catalytic applications.
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Affiliation(s)
- Shaista Zubaid
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, 22060 Abbottabad, Pakistan
| | - Javeria Khan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, 22060 Abbottabad, Pakistan
| | - Tauqir A Sherazi
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, 22060 Abbottabad, Pakistan.
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2
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Kakati N, Anderson L, Li G, Sua-An DM, Karmakar A, Ocon JD, Chuang PYA. Indispensable Nafion Ionomer for High-Efficiency and Stable Oxygen Evolution Reaction in Alkaline Media. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55559-55569. [PMID: 38058109 DOI: 10.1021/acsami.3c08377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
Addressing the challenge of sluggish kinetics and limited stability in alkaline oxygen evolution reactions, recent exploration of novel electrochemical catalysts offers improved prospects. To expedite the assessment of these catalysts, a half-cell rotating disk electrode is often favored for its simplicity. However, the actual catalyst performance strongly depends on the fabricated catalyst layers, which encounter mass transport overpotentials. We systematically investigate the role and sequence of electrode drop-casting methods onto a glassy carbon electrode regarding the efficiency of the oxygen evolution reaction. The catalyst layer without Nafion experiences nearly 50% activity loss post stability test, while those with Nafion exhibit less than 5% activity loss. Additionally, the sequence of application of the catalyst and Nafion also shows a significant effect on catalyst stability. The catalyst activity increases by roughly 20% after the stability test when the catalyst layer is coated first with an ionomer layer, followed by drop-casting the catalysts. Based on the half-cell results, the Nafion ionomer not only acts as a binder in the catalyst layer but also enhances the interfacial interaction between the catalyst and electrolyte, promoting performance and stability. This study provides new insights into the efficient and accurate evaluation of electrocatalyst performance and stability as well as the role of Nafion ionomer in the catalyst layer.
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Affiliation(s)
- Nitul Kakati
- Department of Mechanical Engineering, University of California, Merced, Merced, California 95343, United States
| | - Lawrence Anderson
- Department of Mechanical Engineering, University of California, Merced, Merced, California 95343, United States
| | - Guangfu Li
- Department of Mechanical Engineering, University of California, Merced, Merced, California 95343, United States
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology, Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, China
| | - Desiree Mae Sua-An
- Department of Mechanical Engineering, University of California, Merced, Merced, California 95343, United States
- Laboratory of Electrochemical Engineering, Department of Chemical Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines
| | - Ayon Karmakar
- Department of Mechanical Engineering, University of California, Merced, Merced, California 95343, United States
| | - Joey D Ocon
- Laboratory of Electrochemical Engineering, Department of Chemical Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines
| | - Po-Ya Abel Chuang
- Department of Mechanical Engineering, University of California, Merced, Merced, California 95343, United States
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3
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Tang Y, Wu C, Zhang Q, Zhong H, Zou A, Li J, Ma Y, An H, Yu Z, Xi S, Xue J, Wang X, Wu J. Accelerated Surface Reconstruction through Regulating the Solid-Liquid Interface by Oxyanions in Perovskite Electrocatalysts for Enhanced Oxygen Evolution. Angew Chem Int Ed Engl 2023; 62:e202309107. [PMID: 37470435 DOI: 10.1002/anie.202309107] [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: 06/28/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/21/2023]
Abstract
A comprehensive understanding of surface reconstruction was critical to developing high performance lattice oxygen oxidation mechanism (LOM) based perovskite electrocatalysts. Traditionally, the primary determining factor of the surface reconstruction process was believed to be the oxygen vacancy formation energy. Hence, most previous studies focused on optimizing composition to reduce the oxygen vacancy formation energy, which in turn facilitated the surface reconstruction process. Here, for the first time, we found that adding oxyanions (SO4 2- , CO3 2- , NO3 - ) into the electrolyte could effectively regulate the solid-liquid interface, significantly accelerating the surface reconstruction process and enhancing oxygen evolution reaction (OER) activities. Further studies indicated that the added oxyanions would adsorb onto the solid-liquid interface layer, disrupting the dynamic equilibrium between the adsorbed OH- ions and the OH- ions generated during surface reconstruction process. As such, the OH- ions generated during surface reconstruction process could be more readily released into the electrolyte, thereby leading to an acceleration of the surface reconstruction. Thus, it was expected that our finding would provide a new layer of understanding to the surface reconstruction process in LOM-based perovskite electrocatalysts.
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Affiliation(s)
- Ying Tang
- College of Materials Science and Engineering, Sichuan University, 610065, Chengdu, China
| | - Chao Wu
- College of Materials Science and Engineering, Sichuan University, 610065, Chengdu, China
- Institute of Sustainability for Chemical, Energy and Environment (ISCE2), Agency for Science, Technology and Research, 627833, Singapore, Republic of Singapore
| | - Qi Zhang
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore, Republic of Singapore
| | - Haoyin Zhong
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore, Republic of Singapore
| | - Anqi Zou
- College of Materials Science and Engineering, Sichuan University, 610065, Chengdu, China
| | - Junhua Li
- College of Materials Science and Engineering, Sichuan University, 610065, Chengdu, China
| | - Yifan Ma
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore, Republic of Singapore
| | - Hang An
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore, Republic of Singapore
| | - Zhigen Yu
- Institute of High Performance Computing, Agency for Science, Technology and Research, 138632, Singapore, Republic of Singapore
| | - Shibo Xi
- Institute of Sustainability for Chemical, Energy and Environment (ISCE2), Agency for Science, Technology and Research, 627833, Singapore, Republic of Singapore
| | - Junmin Xue
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore, Republic of Singapore
| | - Xiaopeng Wang
- College of Materials Science and Engineering, Sichuan University, 610065, Chengdu, China
- Department of Materials Science and Engineering, National University of Singapore, 117575, Singapore, Republic of Singapore
| | - Jiagang Wu
- College of Materials Science and Engineering, Sichuan University, 610065, Chengdu, China
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4
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Ikeda H, Misumi R, Nishiki Y, Kuroda Y, Mitsushima S. tert-Butyl-alcohol-induced breakage of the rigid bubble layer that causes overpotential in the oxygen evolution reaction during alkaline water electrolysis. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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5
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Tang J, Xu X, Tang T, Zhong Y, Shao Z. Perovskite-Based Electrocatalysts for Cost-Effective Ultrahigh-Current-Density Water Splitting in Anion Exchange Membrane Electrolyzer Cell. SMALL METHODS 2022; 6:e2201099. [PMID: 36251791 DOI: 10.1002/smtd.202201099] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Development of cost-effective water splitting technology that allows low-overpotential operation at high current density with non-precious catalysts is the key for large-scale hydrogen production. Herein, it is demonstrated that the versatile perovskite-based oxides, usually applied for operating at low current density and room temperature in alkaline solution, can be developed into low-cost, highly active and durable electrocatalysts for operating at high current densities in a zero-gap anion exchange membrane electrolyzer cell (AEMEC). The composite perovskite with mixed phases of Ruddlesden-Popper and single perovskite is applied as the anode in AEMEC and exhibits highly promising performance with an overall water-splitting current density of 2.01 A cm-2 at a cell voltage of only 2.00 V at 60 °C with stable performance. The elevated temperature to promote anion diffusion in membrane boosts oxygen evolution kinetics by enhancing lattice-oxygen participation. The bifunctionality of perovskites further promises the more cost-effective symmetrical AEMEC configuration, and a primary cell with the composite perovskite as both electrodes delivers 3.00 A cm-2 at a cell voltage of only 2.42 V. This work greatly expands the use of perovskites as robust electrocatalysts for industrial water splitting at high current density with great practical application merit.
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Affiliation(s)
- Jiayi Tang
- WA School of Mines: Minerals, Energy and Chemical Engineering (WASM-MECE), Curtin University, Perth, WA, 6102, Australia
| | - Xiaomin Xu
- WA School of Mines: Minerals, Energy and Chemical Engineering (WASM-MECE), Curtin University, Perth, WA, 6102, Australia
| | - Tony Tang
- Blackstone Minerals Limited, Perth, WA, 6005, Australia
| | - Yijun Zhong
- WA School of Mines: Minerals, Energy and Chemical Engineering (WASM-MECE), Curtin University, Perth, WA, 6102, Australia
| | - Zongping Shao
- WA School of Mines: Minerals, Energy and Chemical Engineering (WASM-MECE), Curtin University, Perth, WA, 6102, Australia
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6
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Bhandari S, Narangoda PV, Mogensen SO, Tesch MF, Mechler AK. Effect of Experimental Parameters on the Electrocatalytic Performance in Rotating Disc Electrode Measurements: A Case Study of Oxygen Evolution on Ni‐Co‐Oxide in Alkaline Media. ChemElectroChem 2022. [DOI: 10.1002/celc.202200479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sabita Bhandari
- RWTH Aachen University, Aachener Verfahrenstechnik Electrochemical Reaction Engineering Forckenbeckstr. 51 52074 Aachen GERMANY
| | - Praveen V. Narangoda
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Heterogeneous catalysis Stiftstraße 34-36 45470 Mülheim an der Ruhr GERMANY
| | - Siri O. Mogensen
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Heterogeneous catalysis Stiftstraße 34-36 45470 Mülheim an der Ruhr GERMANY
| | - Marc F. Tesch
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Heterogeneous Catalysis Stiftstraße 34-36 45470 Mülheim an der Ruhr GERMANY
| | - Anna K. Mechler
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Electrochemical Reaction Engineering Forckenbeckstr. 51 52074 Aachen GERMANY
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7
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Liu HJ, Chiang CY, Wu YS, Lin LR, Ye YC, Huang YH, Tsai JL, Lai YC, Munprom R. Breaking the Relation between Activity and Stability of the Oxygen-Evolution Reaction by Highly Doping Ru in Wide-Band-Gap SrTiO 3 as Electrocatalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05539] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Heng-Jui Liu
- Department of Material Science and Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Ching-Yu Chiang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Yun-Sheng Wu
- Department of Material Science and Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Li-Ren Lin
- Department of Material Science and Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Yi-Chen Ye
- Department of Material Science and Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Yi-Hong Huang
- Department of Material Science and Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Jai-Lin Tsai
- Department of Material Science and Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Ying-Chih Lai
- Department of Material Science and Engineering, National Chung Hsing University, Taichung 40227, Taiwan
| | - Ratiporn Munprom
- Department of Materials Engineering, Kasetsart University, Bangkok 10900, Thailand
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8
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Santoro C, Lavacchi A, Mustarelli P, Di Noto V, Elbaz L, Dekel DR, Jaouen F. What is Next in Anion-Exchange Membrane Water Electrolyzers? Bottlenecks, Benefits, and Future. CHEMSUSCHEM 2022; 15:e202200027. [PMID: 35263034 PMCID: PMC9310600 DOI: 10.1002/cssc.202200027] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/02/2022] [Indexed: 05/09/2023]
Abstract
As highlighted by the recent roadmaps from the European Union and the United States, water electrolysis is the most valuable high-intensity technology for producing green hydrogen. Currently, two commercial low-temperature water electrolyzer technologies exist: alkaline water electrolyzer (A-WE) and proton-exchange membrane water electrolyzer (PEM-WE). However, both have major drawbacks. A-WE shows low productivity and efficiency, while PEM-WE uses a significant amount of critical raw materials. Lately, the use of anion-exchange membrane water electrolyzers (AEM-WE) has been proposed to overcome the limitations of the current commercial systems. AEM-WE could become the cornerstone to achieve an intense, safe, and resilient green hydrogen production to fulfill the hydrogen targets to achieve the 2050 decarbonization goals. Here, the status of AEM-WE development is discussed, with a focus on the most critical aspects for research and highlighting the potential routes for overcoming the remaining issues. The Review closes with the future perspective on the AEM-WE research indicating the targets to be achieved.
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Affiliation(s)
- Carlo Santoro
- Department of Materials ScienceUniversity of Milano-BicoccaU5, Via Cozzi 520125MilanoItaly
| | - Alessandro Lavacchi
- Istituto di Chimica Dei Composti OrganoMetallici (ICCOM)Consiglio Nazionale Delle Ricerche (CNR)Via Madonna Del Piano 1050019Sesto FiorentinoFirenzeItaly
| | - Piercarlo Mustarelli
- Department of Materials ScienceUniversity of Milano-BicoccaU5, Via Cozzi 520125MilanoItaly
| | - Vito Di Noto
- Section of Chemistry for the Technology (ChemTech)Department of Industrial EngineeringUniversity of PadovaVia Marzolo 9I-35131PadovaPDItaly
| | - Lior Elbaz
- Department of Chemistry and the Institute of Nanotechnology and Advanced MaterialsBar-Ilan UniversityRamat-Gan5290002Israel
| | - Dario R. Dekel
- The Wolfson Department of Chemical EngineeringTechnion – Israel Institute of TechnologyHaifa3200003Israel
- The Nancy & Stephen Grand Technion Energy Program (GTEP)Technion – Israel Institute of TechnologyHaifa3200003Israel
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9
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Wang M, Feng Z. Interfacial processes in electrochemical energy systems. Chem Commun (Camb) 2021; 57:10453-10468. [PMID: 34494049 DOI: 10.1039/d1cc01703a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Electrochemical energy systems such as batteries, water electrolyzers, and fuel cells are considered as promising and sustainable energy storage and conversion devices due to their high energy densities and zero or negative carbon dioxide emission. However, their widespread applications are hindered by many technical challenges, such as the low efficiency and poor long-term cyclability, which are mostly affected by the changes at the reactant/electrode/electrolyte interfaces. These interfacial processes involve ion/electron transfer, molecular/ion adsorption/desorption, and complex interface restructuring, which lead to irreversible modifications to the electrodes and the electrolyte. The understanding of these interfacial processes is thus crucial to provide strategies for solving those problems. In this review, we will discuss different interfacial processes at three representative interfaces, namely, solid-gas, solid-liquid, and solid-solid, in various electrochemical energy systems, and how they could influence the performance of electrochemical systems.
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Affiliation(s)
- Maoyu Wang
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon, USA.
| | - Zhenxing Feng
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon, USA.
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10
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Akbayrak M, Önal AM. Metal oxides supported cobalt nanoparticles: Active electrocatalysts for oxygen evolution reaction. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139053] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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11
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Wang SH, Pillai HS, Wang S, Achenie LEK, Xin H. Infusing theory into deep learning for interpretable reactivity prediction. Nat Commun 2021; 12:5288. [PMID: 34489441 PMCID: PMC8421337 DOI: 10.1038/s41467-021-25639-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/20/2021] [Indexed: 02/07/2023] Open
Abstract
Despite recent advances of data acquisition and algorithms development, machine learning (ML) faces tremendous challenges to being adopted in practical catalyst design, largely due to its limited generalizability and poor explainability. Herein, we develop a theory-infused neural network (TinNet) approach that integrates deep learning algorithms with the well-established d-band theory of chemisorption for reactivity prediction of transition-metal surfaces. With simple adsorbates (e.g., *OH, *O, and *N) at active site ensembles as representative descriptor species, we demonstrate that the TinNet is on par with purely data-driven ML methods in prediction performance while being inherently interpretable. Incorporation of scientific knowledge of physical interactions into learning from data sheds further light on the nature of chemical bonding and opens up new avenues for ML discovery of novel motifs with desired catalytic properties.
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Affiliation(s)
- Shih-Han Wang
- grid.438526.e0000 0001 0694 4940Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA USA
| | - Hemanth Somarajan Pillai
- grid.438526.e0000 0001 0694 4940Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA USA
| | - Siwen Wang
- grid.438526.e0000 0001 0694 4940Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA USA
| | - Luke E. K. Achenie
- grid.438526.e0000 0001 0694 4940Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA USA
| | - Hongliang Xin
- grid.438526.e0000 0001 0694 4940Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA USA
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12
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Electrochemical investigation of different electrodes toward the removal of non-basic nitrogen compound from model diesel fuel. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Kou Z, Li X, Zhang L, Zang W, Gao X, Wang J. Dynamic Surface Chemistry of Catalysts in Oxygen Evolution Reaction. SMALL SCIENCE 2021. [DOI: 10.1002/smsc.202100011] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Affiliation(s)
- Zongkui Kou
- Department of Materials Science and Engineering National University of Singapore 117574 Singapore Singapore
| | - Xin Li
- Department of Materials Science and Engineering National University of Singapore 117574 Singapore Singapore
| | - Lei Zhang
- Department of Materials Science and Engineering National University of Singapore 117574 Singapore Singapore
| | - Wenjie Zang
- Department of Materials Science and Engineering National University of Singapore 117574 Singapore Singapore
| | - Xiaorui Gao
- Jiangsu Laboratory of Advanced Functional Materials School of Electronic and Information Engineering Changshu Institute of Technology Changshu 215500 P. R. China
| | - John Wang
- Department of Materials Science and Engineering National University of Singapore 117574 Singapore Singapore
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14
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Li D, Wang H, Li C, Liang Y, Yan X, Zhang H. Determination and modulation of the typical interactions among dispersed phases relevant to flotation applications: A review. Adv Colloid Interface Sci 2021; 288:102359. [PMID: 33422930 DOI: 10.1016/j.cis.2020.102359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/04/2020] [Accepted: 12/24/2020] [Indexed: 11/28/2022]
Abstract
Flotation is a process involving multi-components, multi-scales, and gas-liquid-solid three phases, where the material separation is achieved based on the difference in surface hydrophobicity of various constituents. In a flotation system, fluids are usually regarded as the continuous phase, while the dispersed phases refer to scattered particles, bubbles, and droplets with low solubility as a dispersion that is surrounded by the aqueous environment. Fundamentally, the interactions among dispersed phases exist throughout the flotation process, and play distinct roles during different periods. For example, the liquid collector-solid, solid-solid, bubble-bubble and gas bubble-solid interactions are closely associated with the particle surface modification, particle behavior, bubble size evolution and separation in flotation, respectively. Therefore, the influences of each stage are all worthy of concern, and should be spared sufficient attention, which requires to formulate a horizontal writing structure. In this review, instead of summarizing all available characterization techniques or measurements, certain typical examples or methods were consciously chosen to perform analysis or comparison, aiming to summarize recent studies on the determination and modulation of dispersed phase interactions. The determination on the interactions among dispersed phases is helpful for fundamentally understanding the microcosmic process connotations, and their modulation contributes to firmly providing macroscopic optimization schemes for practical applications. By integrating some typically available theoretical calculations and experimental measurements related to the dispersed phase interactions, the present article is devoted to revealing the influential factors, finding out the current challenges or knowledge gaps, and affording certain references or suggestions for future investigations.
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Affiliation(s)
- Danlong Li
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Hainan Wang
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Chenwei Li
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Yannan Liang
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Xiaokang Yan
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Haijun Zhang
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China.
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15
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Zorko M, Farinazzo Bergamo Dias Martins P, Connell JG, Lopes PP, Markovic NM, Stamenkovic VR, Strmcnik D. Improved Rate for the Oxygen Reduction Reaction in a Sulfuric Acid Electrolyte using a Pt(111) Surface Modified with Melamine. ACS APPLIED MATERIALS & INTERFACES 2021; 13:3369-3376. [PMID: 33404211 DOI: 10.1021/acsami.0c18167] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The feasible commercialization of alkaline, phosphoric acid and polymer electrolyte membrane fuel cells depends on the development of oxygen reduction reaction (ORR) electrocatalysts with improved activity, stability, and selectivity. The rational design of surfaces to ensure these improved ORR catalytic requirements relies on the so-called "descriptors" (e.g., the role of covalent and noncovalent interactions on platinum surface active sites for ORR). Here, we demonstrate that through the molecular adsorption of melamine onto the Pt(111) surface [Pt(111)-Mad], the activity can be improved by a factor of 20 compared to bare Pt(111) for the ORR in a strongly adsorbing sulfuric acid solution. The Mad moieties act as "surface-blocking bodies," selectively hindering the adsorption of (bi)sulfate anions (well-known poisoning spectator of the Pt(111) active sites) while the ORR is unhindered. This modified surface is further demonstrated to exhibit improved chemical stability relative to Pt(111) patterned with cyanide species (CNad), previously shown by our group to have a similar ORR activity increase compared to bare Pt(111) in a sulfuric acid electrolyte, with Pt(111)-Mad retaining a greater than ninefold higher ORR activity relative to bare Pt(111) after extensive potential cycling as compared to a greater than threefold higher activity retained on a CNad-covered Pt(111) surface. We suggest that the higher stability of the Pt(111)-Mad interface stems from melamine's ability to form intermolecular hydrogen bonds, which effectively turns the melamine molecules into larger macromolecular entities with multiple anchoring sites and thus more difficult to remove.
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Affiliation(s)
- Milena Zorko
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Centre of Excellence for Low-Carbon Technologies (CoE LCT), Hajdrihova 19, Ljubljana 1000, Slovenia
| | | | - Justin G Connell
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Pietro Papa Lopes
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Nenad M Markovic
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Vojislav R Stamenkovic
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Dusan Strmcnik
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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Vincent I, Lee EC, Kim HM. Comprehensive impedance investigation of low-cost anion exchange membrane electrolysis for large-scale hydrogen production. Sci Rep 2021; 11:293. [PMID: 33432103 PMCID: PMC7801687 DOI: 10.1038/s41598-020-80683-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 12/23/2020] [Indexed: 11/12/2022] Open
Abstract
Anion exchange membrane (AEM) electrolysis is a promising solution for large-scale hydrogen production from renewable energy resources. However, the performance of AEM electrolysis is still lower than what can be achieved with conventional technologies. The performance of AEM electrolysis is limited by integral components of the membrane electrode assembly and the reaction kinetics, which can be measured by ohmic and charge transfer resistances. We here investigate and then quantify the contributions of the ohmic and charge transfer resistances, and the rate-determining steps, involved in AEM electrolysis by using electrochemical impedance spectroscopy analysis. The factors that have an effect on the performance, such as voltage, flow rate, temperature and concentration, were studied at 1.5 and 1.9 V. Increased voltage, flow rate, temperature and concentration of the electrolyte strongly enhanced the anodic activity. We observed that here the anodic reaction offered a greater contribution to the overpotential than the cathode did.
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Affiliation(s)
- Immanuel Vincent
- Power System and Sustainable Energy Laboratory, Department of Nanoscience and Engineering, INJE University, 607 Eobang-Dong, Gimhae-si, Gyongsangnam-do, 621-749, Republic of Korea
| | - Eun-Chong Lee
- Power System and Sustainable Energy Laboratory, Department of Nanoscience and Engineering, INJE University, 607 Eobang-Dong, Gimhae-si, Gyongsangnam-do, 621-749, Republic of Korea
| | - Hyung-Man Kim
- Power System and Sustainable Energy Laboratory, Department of Nanoscience and Engineering, INJE University, 607 Eobang-Dong, Gimhae-si, Gyongsangnam-do, 621-749, Republic of Korea.
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Mandal M. Recent Advancement on Anion Exchange Membranes for Fuel Cell and Water Electrolysis. ChemElectroChem 2020. [DOI: 10.1002/celc.202001329] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mrinmay Mandal
- School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332-0100
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18
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Razmjooei F, Farooqui A, Reissner R, Gago AS, Ansar SA, Friedrich KA. Elucidating the Performance Limitations of Alkaline Electrolyte Membrane Electrolysis: Dominance of Anion Concentration in Membrane Electrode Assembly. ChemElectroChem 2020. [DOI: 10.1002/celc.202000605] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Fatemeh Razmjooei
- Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 Stuttgart 70569 Germany
| | - Azharuddin Farooqui
- Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 Stuttgart 70569 Germany
| | - Regine Reissner
- Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 Stuttgart 70569 Germany
| | - Aldo Saul Gago
- Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 Stuttgart 70569 Germany
| | - Syed Asif Ansar
- Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 Stuttgart 70569 Germany
| | - Kaspar Andreas Friedrich
- Institute of Engineering Thermodynamics German Aerospace Center (DLR) Pfaffenwaldring 38–40 Stuttgart 70569 Germany
- Institute of Building Energetics, Thermal Engineering and Energy Storage (IGTE) University of Stuttgart Pfaffenwaldring 31 70569 Stuttgart Germany
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Arminio‐Ravelo JA, Jensen AW, Jensen KD, Quinson J, Escudero‐Escribano M. Electrolyte Effects on the Electrocatalytic Performance of Iridium‐Based Nanoparticles for Oxygen Evolution in Rotating Disc Electrodes. Chemphyschem 2019; 20:2956-2963. [DOI: 10.1002/cphc.201900902] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/18/2019] [Indexed: 12/19/2022]
Affiliation(s)
| | - Anders W. Jensen
- Nano-Science CenterUniversity of Copenhagen Universitetsparken 5a DK-2100 Copenhagen Ø Denmark
| | - Kim D. Jensen
- Nano-Science CenterUniversity of Copenhagen Universitetsparken 5a DK-2100 Copenhagen Ø Denmark
| | - Jonathan Quinson
- Nano-Science CenterUniversity of Copenhagen Universitetsparken 5a DK-2100 Copenhagen Ø Denmark
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