1
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Putnam ST, Rodríguez-López J. Real-time investigation of reactive oxygen species and radicals evolved from operating Fe-N-C electrocatalysts during the ORR: potential dependence, impact on degradation, and structural comparisons. Chem Sci 2024; 15:10036-10045. [PMID: 38966386 PMCID: PMC11220586 DOI: 10.1039/d4sc01553c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 05/28/2024] [Indexed: 07/06/2024] Open
Abstract
Improving the stability of platinum-group-metal-free (PGM-free) catalysts is a critical roadblock to the development of economically feasible energy storage and conversion technologies. Fe-N-C catalysts, the most promising class of PGM-free catalysts, suffer from rapid degradation. The generation of reactive oxygen species (ROS) during the oxygen reduction reaction (ORR) has been proposed as a central cause of this loss of activity. However, there is insufficient understanding of the generation and dynamics of ROS under catalytic conditions due to the difficulty of detecting and quantifying short-lived ROS such as the hydroxyl radical, OH˙. To accomplish this, we use operando scanning electrochemical microscopy (SECM) to probe the production of radicals by a commercial pyrolyzed Fe-N-C catalyst in real-time using a redox-active spin trap methodology. SECM showed the monotonic production of OH˙ which followed the ORR activity. Our results were thoroughly backed using electron spin resonance confirmation to show that the hydroxyl radical is the dominant radical species produced. Furthermore, OH˙ and H2O2 production followed distinct trends. ROS studied as a function of catalyst degradation also showed a decreased production, suggesting its relation to the catalytic activity of the sample. The structural origins of ROS production were also probed using model systems such as iron phthalocyanine (FePc) and Fe3O4 nanoparticles, both of which showed significant generation of OH˙ during the ORR. These results provide a comprehensive insight into the critical, yet under-studied, aspects of the production and effects of ROS on electrocatalytic systems and open the door for further mechanistic and kinetic investigation using SECM.
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Affiliation(s)
- Seth T Putnam
- Department of Chemistry, University of Illinois Urbana-Champaign 600 S. Matthews Ave. Urbana IL 61801 USA
| | - Joaquín Rodríguez-López
- Department of Chemistry, University of Illinois Urbana-Champaign 600 S. Matthews Ave. Urbana IL 61801 USA
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2
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Xu X, Li X, Lu W, Sun X, Huang H, Cui X, Li L, Zou X, Zheng W, Zhao X. Collective Effect in a Multicomponent Ensemble Combining Single Atoms and Nanoparticles for Efficient and Durable Oxygen Reduction. Angew Chem Int Ed Engl 2024; 63:e202400765. [PMID: 38349119 DOI: 10.1002/anie.202400765] [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: 01/15/2024] [Indexed: 03/01/2024]
Abstract
Metal single-atom catalysts represent one of the most promising non-noble metal catalysts for the oxygen reduction reaction (ORR). However, they still suffer from insufficient activity and, particularly, durability for practical applications. Leveraging density functional theory (DFT) and machine learning (ML), we unravel an unexpected collective effect between FeN4OH sites, CeN4OH motifs, Fe nanoparticles (NPs), and Fe-CeO2 NPs. The collective effect comprises differently-weighted electronic and geometric interactions, whitch results in significantly enhanced ORR activity for FeN4OH active sites with a half-wave potential (E1/2) of 0.948 V versus the reversible hydrogen electrode (VRHE) in alkaline, relative to a commercial Pt/C (E1/2, 0.851 VRHE). Meanwhile, this collective effect endows the shortened Fe-N bonds and the remarkable durability with negligible activity loss after 50,000 potential cycles. The ML was used to understand the intricate geometric and electronic interactions in collective effect and reveal the intrinsic descriptors to account for the enhanced ORR performance. The universality of collective effect was demonstrated effective for the Co, Ni, Cu, Cr, and Mn-based multicomponent ensembles. These results confirm the importance of collective effect to simultaneously improve catalytic activity and durability.
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Affiliation(s)
- Xiaochun Xu
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Xinyi Li
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Wenting Lu
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Xiaoyuan Sun
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Hong Huang
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Xiaoqiang Cui
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Lu Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, China
| | - Xiaoxin Zou
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, China
| | - Weitao Zheng
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Xiao Zhao
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun, 130012, China
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3
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Gallenkamp C, Kramm UI, Krewald V. FeN 4 Environments upon Reduction: A Computational Analysis of Spin States, Spectroscopic Properties, and Active Species. JACS AU 2024; 4:940-950. [PMID: 38559729 PMCID: PMC10976608 DOI: 10.1021/jacsau.3c00714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 04/04/2024]
Abstract
FeN4 motifs, found, for instance, in bioinorganic chemistry as heme-type cofactors, play a crucial role in man-made FeNC catalysts for the oxygen reduction reaction. Such single-atom catalysts are a potential alternative to platinum-based catalysts in fuel cells. Since FeNC catalysts are prepared via pyrolysis, the resulting materials are amorphous and contain side phases and impurities. Therefore, the geometric and electronic nature of the catalytically active FeN4 site remains to be clarified. To further understand the behavior of FeN4 centers in electrochemistry and their expected spectroscopic behavior upon reduction, we investigate two FeN4 environments (pyrrolic and pyridinic). These are represented by the model complexes [Fe(TPP)Cl] and [Fe(phen2N2)Cl], where TPP = tetraphenylporphyrin and phen = 1,10-phenanthroline. We predict their Mössbauer, UV-vis, and NRV spectral data using density functional theory as windows into their electronic structure differences. By varying the axial ligand, we further show how well small chemical changes in both complexes can be discerned. We find that the differences in ligand field strength in pyrrolic and pyridinic coordination result in different spin ground states, which in turn leads to distinct Mössbauer spectroscopic properties. As a result, pyrrolic nitrogen donors with a weaker ligand field are predicted to show more pronounced spectroscopic differences under in situ and operando conditions, while pyridinic nitrogen donors are expected to show less pronounced spectroscopic changes upon reduction and/or ligand loss. We therefore suggest that a weaker ligand field leads to better detectability of catalytic intermediates in in situ and operando experiments.
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Affiliation(s)
- Charlotte Gallenkamp
- Theoretische
Chemie, Technische Universität Darmstadt, Peter-Grünberg-Str. 4, 64287 Darmstadt, Germany
| | - Ulrike I. Kramm
- Anorganische
Chemie, Technische Universität Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
| | - Vera Krewald
- Theoretische
Chemie, Technische Universität Darmstadt, Peter-Grünberg-Str. 4, 64287 Darmstadt, Germany
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4
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Oguz IC, Jaouen F, Mineva T. Exploring Spin Distribution and Electronic Properties in FeN 4-Graphene Catalysts with Edge Terminations. Molecules 2024; 29:479. [PMID: 38257393 PMCID: PMC11154451 DOI: 10.3390/molecules29020479] [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: 12/22/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024] Open
Abstract
Understanding the spin distribution in FeN4-doped graphene nanoribbons with zigzag and armchair terminations is crucial for tuning the electronic properties of graphene-supported non-platinum catalysts. Since the spin-polarized carbon and iron electronic states may act together to change the electronic properties of the doped graphene, we provide in this work a systematic evaluation using a periodic density-functional theory-based method of the variation of spin-moment distribution and electronic properties with the position and orientation of the FeN4 defects, and the edge terminations of the graphene nanoribbons. Antiferromagnetic and ferromagnetic spin ordering of the zigzag edges were considered. We reveal that the electronic structures in both zigzag and armchair geometries are very sensitive to the location of FeN4 defects, changing from semi-conducting (in-plane defect location) to half-metallic (at-edge defect location). The introduction of FeN4 defects at edge positions cancels the known dependence of the magnetic and electronic proper-ties of undoped graphene nanoribbons on their edge geometries. The implications of the reported results for catalysis are also discussed in view of the presented electronic and magnetic properties.
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Affiliation(s)
| | | | - Tzonka Mineva
- ICGM, Univ. Montpellier, 34293 Montpellier, France; (I.C.O.); (F.J.)
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5
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Bates JS, Martinez JJ, Hall MN, Al-Omari AA, Murphy E, Zeng Y, Luo F, Primbs M, Menga D, Bibent N, Sougrati MT, Wagner FE, Atanassov P, Wu G, Strasser P, Fellinger TP, Jaouen F, Root TW, Stahl SS. Chemical Kinetic Method for Active-Site Quantification in Fe-N-C Catalysts and Correlation with Molecular Probe and Spectroscopic Site-Counting Methods. J Am Chem Soc 2023; 145:26222-26237. [PMID: 37983387 PMCID: PMC10782517 DOI: 10.1021/jacs.3c08790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Mononuclear Fe ions ligated by nitrogen (FeNx) dispersed on nitrogen-doped carbon (Fe-N-C) serve as active centers for electrocatalytic O2 reduction and thermocatalytic aerobic oxidations. Despite their promise as replacements for precious metals in a variety of practical applications, such as fuel cells, the discovery of new Fe-N-C catalysts has relied primarily on empirical approaches. In this context, the development of quantitative structure-reactivity relationships and benchmarking of catalysts prepared by different synthetic routes and by different laboratories would be facilitated by the broader adoption of methods to quantify atomically dispersed FeNx active centers. In this study, we develop a kinetic probe reaction method that uses the aerobic oxidation of a model hydroquinone substrate to quantify the density of FeNx centers in Fe-N-C catalysts. The kinetic method is compared with low-temperature Mössbauer spectroscopy, CO pulse chemisorption, and electrochemical reductive stripping of NO derived from NO2- on a suite of Fe-N-C catalysts prepared by diverse routes and featuring either the exclusive presence of Fe as FeNx sites or the coexistence of aggregated Fe species in addition to FeNx. The FeNx site densities derived from the kinetic method correlate well with those obtained from CO pulse chemisorption and Mössbauer spectroscopy. The broad survey of Fe-N-C materials also reveals the presence of outliers and challenges associated with each site quantification approach. The kinetic method developed here does not require pretreatments that may alter active-site distributions or specialized equipment beyond reaction vessels and standard analytical instrumentation.
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Affiliation(s)
- Jason S. Bates
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Jesse J. Martinez
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Melissa N. Hall
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Abdulhadi A. Al-Omari
- Department of Chemical and Biomolecular Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Eamonn Murphy
- Department of Chemical and Biomolecular Engineering, National Fuel Cell Research Center, University of California, Irvine, California 92697, USA
| | - Yachao Zeng
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA
| | - Fang Luo
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Mathias Primbs
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Davide Menga
- Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München (TUM), 85748 Garching, Germany
| | - Nicolas Bibent
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | | | - Friedrich E. Wagner
- Department of Physics, Technische Universität München (TUM), 85748 Garching, Germany
| | - Plamen Atanassov
- Department of Chemical and Biomolecular Engineering, National Fuel Cell Research Center, University of California, Irvine, California 92697, USA
| | - Gang Wu
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA
| | - Peter Strasser
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Tim-Patrick Fellinger
- Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München (TUM), 85748 Garching, Germany
- Bundesanstalt für Materialforschung und -prüfung (BAM), 12203 Berlin, Germany
| | - Frédéric Jaouen
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Thatcher W. Root
- Department of Chemical and Biomolecular Engineering, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA
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6
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Lu X, Kuai L, Huang F, Jiang J, Song J, Liu Y, Chen S, Mao L, Peng W, Luo Y, Li Y, Dong H, Li B, Shi J. Single-atom catalysts-based catalytic ROS clearance for efficient psoriasis treatment and relapse prevention via restoring ESR1. Nat Commun 2023; 14:6767. [PMID: 37880231 PMCID: PMC10600197 DOI: 10.1038/s41467-023-42477-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 10/12/2023] [Indexed: 10/27/2023] Open
Abstract
Psoriasis is a common inflammatory disease of especially high recurrence rate (90%) which is suffered by approximately 3% of the world population. The overexpression of reactive oxygen species (ROS) plays a critical role in psoriasis progress. Here we show that biomimetic iron single-atom catalysts (FeN4O2-SACs) with broad-spectrum ROS scavenging capability can be used for psoriasis treatment and relapse prevention via related gene restoration. FeN4O2-SACs demonstrate attractive multiple enzyme-mimicking activities based on atomically dispersed Fe active structures, which are analogous to those of natural antioxidant enzymes, iron superoxide dismutase, human erythrocyte catalase, and ascorbate peroxidase. Further, in vitro and in vivo experiments show that FeN4O2-SACs can effectively ameliorate psoriasis-like symptoms and prevent the relapse with augmented efficacy compared with the clinical drug calcipotriol. Mechanistically, estrogen receptor 1 (ESR1) is identified as the core protein upregulated in psoriasis treatment through RNA sequencing and bioinformatic analysis. Together, this study provides a proof of concept of psoriasis catalytic therapy (PCT) and multienzyme-inspired bionics (MIB).
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Affiliation(s)
- Xiangyu Lu
- Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, Clinical Center For Brain And Spinal Cord Research, School of Medicine, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Research Unit of Nanocatalytic Medicine in Specific Therapy for Serious Disease, Chinese Academy of Medical Sciences, Shanghai, 200050, China
| | - Le Kuai
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
- Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Fang Huang
- Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, Clinical Center For Brain And Spinal Cord Research, School of Medicine, Tongji University, Shanghai, 200092, China
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China
| | - Jingsi Jiang
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Jiankun Song
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Yiqiong Liu
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Si Chen
- Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, Clinical Center For Brain And Spinal Cord Research, School of Medicine, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Research Unit of Nanocatalytic Medicine in Specific Therapy for Serious Disease, Chinese Academy of Medical Sciences, Shanghai, 200050, China
| | - Lijie Mao
- Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, Clinical Center For Brain And Spinal Cord Research, School of Medicine, Tongji University, Shanghai, 200092, China
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Research Unit of Nanocatalytic Medicine in Specific Therapy for Serious Disease, Chinese Academy of Medical Sciences, Shanghai, 200050, China
| | - Wei Peng
- Institute of Waste Treatment and Reclamation, College of Environment Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Ying Luo
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
- Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Yongyong Li
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Haiqing Dong
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji Hospital, School of Medicine, Tongji University, Shanghai, 200065, China.
| | - Bin Li
- Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, 201203, China.
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China.
| | - Jianlin Shi
- Shanghai Tenth People's Hospital, Shanghai Frontiers Science Center of Nanocatalytic Medicine, Clinical Center For Brain And Spinal Cord Research, School of Medicine, Tongji University, Shanghai, 200092, China.
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Research Unit of Nanocatalytic Medicine in Specific Therapy for Serious Disease, Chinese Academy of Medical Sciences, Shanghai, 200050, China.
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7
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Kumar K, Dubau L, Jaouen F, Maillard F. Review on the Degradation Mechanisms of Metal-N-C Catalysts for the Oxygen Reduction Reaction in Acid Electrolyte: Current Understanding and Mitigation Approaches. Chem Rev 2023; 123:9265-9326. [PMID: 37432676 DOI: 10.1021/acs.chemrev.2c00685] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
One bottleneck hampering the widespread use of fuel cell vehicles, in particular of proton exchange membrane fuel cells (PEMFCs), is the high cost of the cathode where the oxygen reduction reaction (ORR) occurs, due to the current need of precious metals to catalyze this reaction. Electrochemists tackle this issue in the short/medium term by developing catalysts with improved utilization or efficiency of platinum, and in the longer term, by developing catalysts based on Earth-abundant elements. Considerable progress has been achieved in the initial performance of Metal-nitrogen-carbon (Metal-N-C) catalysts for the ORR, especially with Fe-N-C materials. However, until now, this high performance cannot be maintained for a sufficiently long time in an operating PEMFC. The identification and mitigation of the degradation mechanisms of Metal-N-C electrocatalysts in the acidic environment of PEMFCs has therefore become an important research topic. Here, we review recent advances in the understanding of the degradation mechanisms of Metal-N-C electrocatalysts, including the recently identified importance of combined oxygen and electrochemical potential. Results obtained in a liquid electrolyte and a PEMFC device are discussed, as well as insights gained from in situ and operando techniques. We also review the mitigation approaches that the scientific community has hitherto investigated to overcome the durability issues of Metal-N-C electrocatalysts.
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Affiliation(s)
- Kavita Kumar
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, F-38000 Grenoble, France
| | - Laetitia Dubau
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, F-38000 Grenoble, France
| | - Frédéric Jaouen
- ICGM, Univ. Montpellier, CNRS, ENSCM, F-34293 Montpellier, France
| | - Frédéric Maillard
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, F-38000 Grenoble, France
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8
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Li B, Li Q, Wang X. Iron/iron carbide coupled with S, N co-doped porous carbon as effective oxygen reduction reaction catalyst for microbial fuel cells. ENVIRONMENTAL RESEARCH 2023; 228:115808. [PMID: 37011794 DOI: 10.1016/j.envres.2023.115808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/23/2023] [Accepted: 03/29/2023] [Indexed: 05/16/2023]
Abstract
As a novel energy device, microbial fuel cells (MFCs) have attracted much attention for their dual functions of electricity generation and sewage treatment. However, the sluggish oxygen reduction reaction (ORR) kinetic on the cathode have hindered the practical application of MFCs. In this work, metallic organic framework derived carbon framework co-doped by Fe, S, N tri-elements was used as alternative electrocatalyst to the conventional Pt/C cathode catalyst in pH-universal electrolytes. The amount of thiosemicarbazide from 0.3 to 3 g determined the surface chemical property, and therefore the ORR activity of FeSNC catalysts. The sulfur/nitrogen doping and Fe/Fe3C embedded in carbon shell was characterized by X-ray photoelectron spectroscopy and transmission electron microscopy. The synergy of iron salt and thiosemicarbazide contributed to the improvement of nitrogen and sulfur doping. Sulfur atoms were successfully doped into the carbon matrix and formed a certain amount of thiophene- and oxidized-sulfur. The optimal FeSNC-3 catalyst synthesized with 1.5 g of thiosemicarbazide exhibited the highest ORR activity with a positive half wave potential of 0.866 V in alkaline and 0.691 V (vs. Reversible Hydrogen Electrode) in neutral electrolyte, which both outperformed the commercial Pt/C catalyst. However, as the amount of thiosemicarbazide surpassed 1.5 g, the catalytic performance of FeSNC-4 was lowered, and this could be assigned to the decreased defects and low specific surface area. The excellent ORR performance in neutral medium urged FeSNC-3 as good cathode catalyst in single chambered MFC (SCMFC). It showed the highest maximum power density of 2126 ± 100 mW m-2, excellent output stability of 8.14% decline in 550 h, chemical oxygen demand removal of 90.7 ± 1.6% and coulombic efficiency of 12.5 ± 1.1%, all superior to those of benchmark SCMFC-Pt/C (1637 ± 35 mW m-2, 15.4%, 88.9 ± 0.9%, and 10.2 ± 1.1%). These outstanding results were associated to the large specific surface area and synergistic interaction of multiple active sites, like Fe/Fe3C, Fe-N4, pyridinic N, graphite N and thiophene-S.
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Affiliation(s)
- Baitao Li
- Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Qun Li
- Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Xiujun Wang
- Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
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9
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Bates JS, Johnson MR, Khamespanah F, Root TW, Stahl SS. Heterogeneous M-N-C Catalysts for Aerobic Oxidation Reactions: Lessons from Oxygen Reduction Electrocatalysts. Chem Rev 2023; 123:6233-6256. [PMID: 36198176 PMCID: PMC10073352 DOI: 10.1021/acs.chemrev.2c00424] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Nonprecious metal heterogeneous catalysts composed of first-row transition metals incorporated into nitrogen-doped carbon matrices (M-N-Cs) have been studied for decades as leading alternatives to Pt for the electrocatalytic O2 reduction reaction (ORR). More recently, similar M-N-C catalysts have been shown to catalyze the aerobic oxidation of organic molecules. This Focus Review highlights mechanistic similarities and distinctions between these two reaction classes and then surveys the aerobic oxidation reactions catalyzed by M-N-Cs. As the active-site structures and kinetic properties of M-N-C aerobic oxidation catalysts have not been extensively studied, the array of tools and methods used to characterize ORR catalysts are presented with the goal of supporting further advances in the field of aerobic oxidation.
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Affiliation(s)
- Jason S. Bates
- Department of Chemistry, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - Mathew R. Johnson
- Department of Chemistry, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - Fatemeh Khamespanah
- Department of Chemistry, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - Thatcher W. Root
- Department of Chemical and Biological Engineering, University of Wisconsin–Madison, Madison, WI 53706, USA
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin–Madison, Madison, WI 53706, USA
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10
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Barrio J, Pedersen A, Sarma SC, Bagger A, Gong M, Favero S, Zhao CX, Garcia-Serres R, Li AY, Zhang Q, Jaouen F, Maillard F, Kucernak A, Stephens IEL, Titirici MM. FeNC Oxygen Reduction Electrocatalyst with High Utilization Penta-Coordinated Sites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2211022. [PMID: 36739474 DOI: 10.1002/adma.202211022] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/11/2023] [Indexed: 06/18/2023]
Abstract
Atomic Fe in N-doped carbon (FeNC) electrocatalysts for oxygen (O2 ) reduction at the cathode of proton exchange membrane fuel cells are the most promising alternative to platinum-group-metal catalysts. Despite recent progress on atomic FeNC O2 reduction, their controlled synthesis and stability for practical applications remain challenging. A two-step synthesis approach has recently led to significant advances in terms of Fe-loading and mass activity; however, the Fe utilization remains low owing to the difficulty of building scaffolds with sufficient porosity that electrochemically exposes the active sites. Herein, this issue is addressed by coordinating Fe in a highly porous nitrogen-doped carbon support (≈3295 m2 g-1 ), prepared by pyrolysis of inexpensive 2,4,6-triaminopyrimidine and a Mg2+ salt active site template and porogen. Upon Fe coordination, a high electrochemical active site density of 2.54 × 1019 sites gFeNC -1 and a record 52% FeNx electrochemical utilization based on in situ nitrite stripping are achieved. The Fe single atoms are characterized pre- and post-electrochemical accelerated stress testing by aberration-corrected high-angle annular dark field scanning transmission electron microscopy, showing no Fe clustering. Moreover, ex situ X-ray absorption spectroscopy and low-temperature Mössbauer spectroscopy suggest the presence of penta-coordinated Fe sites, which are further studied by density functional theory calculations.
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Affiliation(s)
- Jesús Barrio
- Department of Materials, Royal School of Mines, Imperial College London, London, SW7 2AZ, UK
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Angus Pedersen
- Department of Materials, Royal School of Mines, Imperial College London, London, SW7 2AZ, UK
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Saurav Ch Sarma
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Alexander Bagger
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Mengjun Gong
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, London, W12 0BZ, UK
| | - Silvia Favero
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Chang-Xin Zhao
- Department of Chemical Engineering, Tsinghua University, 1 Tsinghua Road, Beijing, 100084, P. R. China
| | - Ricardo Garcia-Serres
- Chemistry and Biology of Metals Laboratory, CNRS, CEA, IRIG, University Grenoble Alpes, 17 Rue Des Martyrs, Grenoble, 38000, France
| | - Alain Y Li
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Qiang Zhang
- Department of Chemical Engineering, Tsinghua University, 1 Tsinghua Road, Beijing, 100084, P. R. China
| | - Frédéric Jaouen
- Institute of Molecular Chemistry and Materials Sciences, CNRS, ENSCM, University of Montpellier, 1919 route de Mende, Montpellier, 34293, France
| | - Frédéric Maillard
- Laboratory of Electrochemistry and Physico-Chemistry of Materials and Interfaces (LEPMI), CNRS, University Savoie Mont-Blanc, Grenoble-INP, University Grenoble Alpes, Grenoble, 38000, France
| | - Anthony Kucernak
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, London, W12 0BZ, UK
| | - Ifan E L Stephens
- Department of Materials, Royal School of Mines, Imperial College London, London, SW7 2AZ, UK
| | - Maria-Magdalena Titirici
- Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aobaku, Sendai, Miyagi, 980-8577, Japan
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11
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Zhao Y, Adiyeri Saseendran DP, Huang C, Triana CA, Marks WR, Chen H, Zhao H, Patzke GR. Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design. Chem Rev 2023; 123:6257-6358. [PMID: 36944098 DOI: 10.1021/acs.chemrev.2c00515] [Citation(s) in RCA: 55] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
The oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are core steps of various energy conversion and storage systems. However, their sluggish reaction kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, the complexity of the catalyst-electrolyte interface makes a comprehensive understanding of the intrinsic OER/ORR mechanisms challenging. Fortunately, recent advances of in situ/operando characterization techniques have facilitated the kinetic monitoring of catalysts under reaction conditions. Here we provide selected highlights of recent in situ/operando mechanistic studies of OER/ORR catalysts with the main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate under basic conditions), followed by a brief outlook on molecular catalysts. Key sections in this review are focused on determination of the true active species, identification of the active sites, and monitoring of the reactive intermediates. For in-depth insights into the above factors, a short overview of the metrics for accurate characterizations of OER/ORR catalysts is provided. A combination of the obtained time-resolved reaction information and reliable activity data will then guide the rational design of new catalysts. Strategies such as optimizing the restructuring process as well as overcoming the adsorption-energy scaling relations will be discussed. Finally, pending current challenges and prospects toward the understanding and development of efficient heterogeneous catalysts and selected homogeneous catalysts are presented.
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Affiliation(s)
- Yonggui Zhao
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | | | - Chong Huang
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Carlos A Triana
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Walker R Marks
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Hang Chen
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Han Zhao
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Greta R Patzke
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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12
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Heppe N, Gallenkamp C, Paul S, Segura-Salas N, von Rhein N, Kaiser B, Jaegermann W, Jafari A, Sergueev I, Krewald V, Kramm UI. Substituent Effects in Iron Porphyrin Catalysts for the Hydrogen Evolution Reaction. Chemistry 2023; 29:e202202465. [PMID: 36301727 DOI: 10.1002/chem.202202465] [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: 08/08/2022] [Revised: 10/27/2022] [Accepted: 10/27/2022] [Indexed: 11/07/2022]
Abstract
For a future hydrogen economy, non-precious metal catalysts for the water splitting reactions are needed that can be implemented on a global scale. Metal-nitrogen-carbon (MNC) catalysts with active sites constituting a metal center with fourfold coordination of nitrogen (MN4 ) show promising performance, but an optimization rooted in structure-property relationships has been hampered by their low structural definition. Porphyrin model complexes are studied to transfer insights from well-defined molecules to MNC systems. This work combines experiment and theory to evaluate the influence of porphyrin substituents on the electronic and electrocatalytic properties of MN4 centers with respect to the hydrogen evolution reaction (HER) in aqueous electrolyte. We found that the choice of substituent affects their utilization on the carbon support and their electrocatalytic performance. We propose an HER mechanism for supported iron porphyrin complexes involving a [FeII (P⋅)]- radical anion intermediate, in which a porphinic nitrogen atom acts as an internal base. While this work focuses on the HER, the limited influence of a simultaneous interaction with the support and an aqueous electrolyte will likely be transferrable to other catalytic applications.
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Affiliation(s)
- Nils Heppe
- Catalysts and Electrocatalysts, Department of Chemistry, Eduard-Zintl-Insitute for Inorganic and Physical Chemistry, Technical University Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
| | - Charlotte Gallenkamp
- Catalysts and Electrocatalysts, Department of Chemistry, Eduard-Zintl-Insitute for Inorganic and Physical Chemistry, Technical University Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany.,Department of Chemistry, Theoretical Chemistry, Technical University Darmstadt, Alarich-Weiss-Str. 4, 64287, Darmstadt, Germany
| | - Stephen Paul
- Catalysts and Electrocatalysts, Department of Chemistry, Eduard-Zintl-Insitute for Inorganic and Physical Chemistry, Technical University Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
| | - Nicole Segura-Salas
- Catalysts and Electrocatalysts, Department of Chemistry, Eduard-Zintl-Insitute for Inorganic and Physical Chemistry, Technical University Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
| | - Niklas von Rhein
- Department of Chemistry, Theoretical Chemistry, Technical University Darmstadt, Alarich-Weiss-Str. 4, 64287, Darmstadt, Germany
| | - Bernhard Kaiser
- Institute of Materials Science, Surface Science Division, Technical University Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
| | - Wolfram Jaegermann
- Institute of Materials Science, Surface Science Division, Technical University Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
| | - Atefeh Jafari
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607, Hamburg, Germany
| | - Ilya Sergueev
- Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607, Hamburg, Germany
| | - Vera Krewald
- Department of Chemistry, Theoretical Chemistry, Technical University Darmstadt, Alarich-Weiss-Str. 4, 64287, Darmstadt, Germany
| | - Ulrike I Kramm
- Catalysts and Electrocatalysts, Department of Chemistry, Eduard-Zintl-Insitute for Inorganic and Physical Chemistry, Technical University Darmstadt, Otto-Berndt-Str. 3, 64287, Darmstadt, Germany
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13
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Liu T, Wang Y, Li Y. How pH Affects the Oxygen Reduction Reactivity of Fe–N–C Materials. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Tianyang Liu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu 210023, P.R. China
| | - Yu Wang
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu 210023, P.R. China
| | - Yafei Li
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu 210023, P.R. China
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14
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Iron Redox Behavior and Oxygen Reduction Activity of Fe-N-C Electrocatalysts in Different Electrolytes. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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15
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Bates JS, Khamespanah F, Cullen DA, Al-Omari AA, Hopkins MN, Martinez JJ, Root TW, Stahl SS. Molecular Catalyst Synthesis Strategies to Prepare Atomically Dispersed Fe-N-C Heterogeneous Catalysts. J Am Chem Soc 2022; 144:18797-18802. [PMID: 36215721 PMCID: PMC9888425 DOI: 10.1021/jacs.2c08884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
We report a strategy to integrate atomically dispersed iron within a heterogeneous nitrogen-doped carbon (N-C) support, inspired by routes for metalation of molecular macrocyclic iron complexes. The N-C support, derived from pyrolysis of a ZIF-8 metal-organic framework, is metalated via solution-phase reaction with FeCl2 and tributyl amine, as a Brønsted base, at 150 °C. Fe active sites are characterized by 57Fe Mössbauer spectroscopy and aberration-corrected scanning transmission electron microscopy. The site density can be increased by selective removal of Zn2+ ions from the N-C support prior to metalation, resembling the transmetalation strategy commonly employed for the preparation of molecular Fe-macrocycles. The utility of this approach is validated by the higher catalytic rates (per total Fe) of these materials relative to established Fe-N-C catalysts, benchmarked using an aerobic oxidation reaction.
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Affiliation(s)
- Jason S. Bates
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Fatemeh Khamespanah
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - David A. Cullen
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA
| | - Abdulhadi A. Al-Omari
- Department of Chemical and Biological Engineering, University of Wisconsin–Madison, 1415 Engineering Drive, Madison, WI 53706, USA
| | - Melissa N. Hopkins
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Jesse J. Martinez
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706, USA
| | - Thatcher W. Root
- Department of Chemical and Biological Engineering, University of Wisconsin–Madison, 1415 Engineering Drive, Madison, WI 53706, USA
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706, USA,Corresponding Authors
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16
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Orellana W, Zuñiga C, Gatica A, Ureta-Zanartu MS, Zagal JH, Tasca F. Effect of Electrolyte Media on the Catalysis of Fe Phthalocyanine toward the Oxygen Reduction Reaction: Ab Initio Molecular Dynamics Simulations and Experimental Analyses. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Walter Orellana
- Departamento de Ciencias Físicas, Universidad Andres Bello, Sazié 2212, Santiago837-0136, Chile
| | - Cesar Zuñiga
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
| | - Angelica Gatica
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
| | - Maria-Soledad Ureta-Zanartu
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
| | - Jose H. Zagal
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
| | - Federico Tasca
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
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17
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Ni L, Gallenkamp C, Wagner S, Bill E, Krewald V, Kramm UI. Identification of the Catalytically Dominant Iron Environment in Iron- and Nitrogen-Doped Carbon Catalysts for the Oxygen Reduction Reaction. J Am Chem Soc 2022; 144:16827-16840. [PMID: 36036727 DOI: 10.1021/jacs.2c04865] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
For large-scale utilization of fuel cells in a future hydrogen-based energy economy, affordable and environmentally benign catalysts are needed. Pyrolytically obtained metal- and nitrogen-doped carbon (MNC) catalysts are key contenders for this task. Their systematic improvement requires detailed knowledge of the active site composition and degradation mechanisms. In FeNC catalysts, the active site is an iron ion coordinated by nitrogen atoms embedded in an extended graphene sheet. Herein, we build an active site model from in situ and operando 57Fe Mössbauer spectroscopy and quantum chemistry. A Mössbauer signal newly emerging under operando conditions, D4, is correlated with the loss of other Mössbauer signatures (D2, D3a, D3b), implying a direct structural correspondence. Pyrrolic N-coordination, i.e., FeN4C12, is found as a spectroscopically and thermodynamically consistent model for the entire catalytic cycle, in contrast to pyridinic nitrogen coordination. These findings thus overcome the previously conflicting structural assignments for the active site and, moreover, identify and structurally assign a previously unknown intermediate in the oxygen reduction reaction at FeNC catalysts.
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Affiliation(s)
- Lingmei Ni
- Department of Chemistry and Department of Materials and Earth Sciences, Catalysts and Electrocatalysts Group, TU Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
| | - Charlotte Gallenkamp
- Department of Chemistry and Department of Materials and Earth Sciences, Catalysts and Electrocatalysts Group, TU Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany.,Department of Chemistry, Theoretical Chemistry, TU Darmstadt, Alarich-Weiss-Str. 4, 64287 Darmstadt, Germany
| | - Stephan Wagner
- Department of Chemistry and Department of Materials and Earth Sciences, Catalysts and Electrocatalysts Group, TU Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Vera Krewald
- Department of Chemistry, Theoretical Chemistry, TU Darmstadt, Alarich-Weiss-Str. 4, 64287 Darmstadt, Germany
| | - Ulrike I Kramm
- Department of Chemistry and Department of Materials and Earth Sciences, Catalysts and Electrocatalysts Group, TU Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany.,Graduate School of Excellence Energy Science and Engineering, TU Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
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18
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Wan L, Zhao K, Wang YC, Wei N, Zhang P, Yuan J, Zhou Z, Sun SG. Molecular Degradation of Iron Phthalocyanine during the Oxygen Reduction Reaction in Acidic Media. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Liyang Wan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Kuangmin Zhao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yu-Cheng Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Nian Wei
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Pengyang Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jiayin Yuan
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm 10691, Sweden
| | - Zhiyou Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shi-Gang Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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19
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Luo F, Wagner S, Ju W, Primbs M, Li S, Wang H, Kramm UI, Strasser P. Kinetic Diagnostics and Synthetic Design of Platinum Group Metal-Free Electrocatalysts for the Oxygen Reduction Reaction Using Reactivity Maps and Site Utilization Descriptors. J Am Chem Soc 2022; 144:13487-13498. [PMID: 35862859 DOI: 10.1021/jacs.2c01594] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The experimental development of catalytically ever-more active platinum group metal (PGM)-free materials for the oxygen reduction reaction (ORR) at fuel cell cathodes has been until recently a rather empirical iteration of synthesis and testing. Here, we present how kinetic reactivity maps based on kinetic descriptors of PGM-free single-metal-site ORR electrocatalysts can help to better understand the origin of catalytic reactivity and help to derive rational synthetic guidelines toward improved catalysts. Key in our analysis are the catalytic surface site density (SD) and the catalytic turnover frequency (TOF) in their role as controlling kinetic parameters for the ORR reactivity of PGM-free nitrogen-coordinated single-metal M-site carbon (MNC) catalysts. SD-TOF plots establish two-dimensional reactivity maps. We also consider the ratio between SD and the total number of single-metal sites in the bulk, referred to as the site utilization factor, which we propose as another guiding parameter for optimizing the synthesis of MNC catalysts. Exemplified by two sets of FeNC, CoNC, and SnNC catalysts prepared using two distinctly different N- and C-precursor material classes (Zn-based zeolitic imidazolate frameworks and covalent polyaniline), we comparatively diagnose the intrinsic kinetic ORR parameters as well as structural, morphological, and chemical properties. From there, we derive and discuss possible synthetic guidelines for further improvements. Our approach can be extended to other families of catalysts and may involve kinetic performance data of idealized liquid-electrolyte cells as well as gas diffusion layer-type flow cells.
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Affiliation(s)
- Fang Luo
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, Straße des 17. Juni 142, 10623 Berlin, Germany
| | - Stephan Wagner
- Department of Chemistry and Department of Materials and Earth Sciences, Graduate School of Excellence Energy Science and Engineering, Technical University of Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
| | - Wen Ju
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, Straße des 17. Juni 142, 10623 Berlin, Germany
| | - Mathias Primbs
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, Straße des 17. Juni 142, 10623 Berlin, Germany
| | - Shuang Li
- Functional Materials, Department of Chemistry, Technical University Berlin, Hardenbergstr. 40, 10623 Berlin, Germany
| | - Huan Wang
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, Straße des 17. Juni 142, 10623 Berlin, Germany
| | - Ulrike I Kramm
- Department of Chemistry and Department of Materials and Earth Sciences, Graduate School of Excellence Energy Science and Engineering, Technical University of Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
| | - Peter Strasser
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, Straße des 17. Juni 142, 10623 Berlin, Germany
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20
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He T, Chen Y, Liu Q, Lu B, Song X, Liu H, Liu M, Liu YN, Zhang Y, Ouyang X, Chen S. Theory-Guided Regulation of FeN 4 Spin State by Neighboring Cu Atoms for Enhanced Oxygen Reduction Electrocatalysis in Flexible Metal-Air Batteries. Angew Chem Int Ed Engl 2022; 61:e202201007. [PMID: 35468253 DOI: 10.1002/anie.202201007] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Indexed: 01/11/2023]
Abstract
Iron, nitrogen-codoped carbon (Fe-N-C) nanocomposites have emerged as viable electrocatalysts for the oxygen reduction reaction (ORR) due to the formation of FeNx Cy coordination moieties. In this study, results from first-principles calculations show a nearly linear correlation of the energy barriers of key reaction steps with the Fe magnetic moment. Experimentally, when single Cu sites are incorporated into Fe-N-C aerogels (denoted as NCAG/Fe-Cu), the Fe centers exhibit a reduced magnetic moment and markedly enhanced ORR activity within a wide pH range of 0-14. With the NCAG/Fe-Cu nanocomposites used as the cathode catalyst in a neutral/quasi-solid aluminum-air and alkaline/quasi-solid zinc-air battery, both achieve a remarkable performance with an ultrahigh open-circuit voltage of 2.00 and 1.51 V, large power density of 130 and 186 mW cm-2 , and good mechanical flexibility, all markedly better than those with commercial Pt/C or Pt/C-RuO2 catalysts at the cathode.
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Affiliation(s)
- Ting He
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China.,School of Materials Science and Engineering, Xiangtan University Yuhu District, Xiangtan, Hunan, 411105, China
| | - Yang Chen
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China
| | - Qiming Liu
- Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
| | - Bingzhang Lu
- Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
| | - Xianwen Song
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China
| | - Hongtao Liu
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China
| | - Min Liu
- School of Physics and Electronics, Central South University, Changsha, Hunan, 410083, China
| | - You-Nian Liu
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China
| | - Yi Zhang
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, China.,Key Laboratory of Materials Processing and Mold, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, 450002, China
| | - Xiaoping Ouyang
- School of Materials Science and Engineering, Xiangtan University Yuhu District, Xiangtan, Hunan, 411105, China
| | - Shaowei Chen
- Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
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21
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He T, Chen Y, Liu Q, Lu B, Song X, Liu H, Liu M, Liu Y, Zhang Y, Ouyang X, Chen S. Theory‐Guided Regulation of FeN
4
Spin State by Neighboring Cu Atoms for Enhanced Oxygen Reduction Electrocatalysis in Flexible Metal–Air Batteries. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ting He
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science College of Chemistry and Chemical Engineering Central South University 932 Lushan South Road Changsha Hunan 410083 China
- School of Materials Science and Engineering Xiangtan University Yuhu District Xiangtan Hunan 411105 China
| | - Yang Chen
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science College of Chemistry and Chemical Engineering Central South University 932 Lushan South Road Changsha Hunan 410083 China
| | - Qiming Liu
- Department of Chemistry and Biochemistry University of California 1156 High Street Santa Cruz CA 95064 USA
| | - Bingzhang Lu
- Department of Chemistry and Biochemistry University of California 1156 High Street Santa Cruz CA 95064 USA
| | - Xianwen Song
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science College of Chemistry and Chemical Engineering Central South University 932 Lushan South Road Changsha Hunan 410083 China
| | - Hongtao Liu
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science College of Chemistry and Chemical Engineering Central South University 932 Lushan South Road Changsha Hunan 410083 China
| | - Min Liu
- School of Physics and Electronics Central South University Changsha Hunan 410083 China
| | - You‐Nian Liu
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science College of Chemistry and Chemical Engineering Central South University 932 Lushan South Road Changsha Hunan 410083 China
| | - Yi Zhang
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science College of Chemistry and Chemical Engineering Central South University 932 Lushan South Road Changsha Hunan 410083 China
- Key Laboratory of Materials Processing and Mold, Ministry of Education Zhengzhou University Zhengzhou, Henan 450002 China
| | - Xiaoping Ouyang
- School of Materials Science and Engineering Xiangtan University Yuhu District Xiangtan Hunan 411105 China
| | - Shaowei Chen
- Department of Chemistry and Biochemistry University of California 1156 High Street Santa Cruz CA 95064 USA
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22
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Hua Q, Madsen KE, Esposito AM, Chen X, Woods TJ, Haasch RT, Xiang S, Frenkel AI, Fister TT, Gewirth AA. Effect of Support on Oxygen Reduction Reaction Activity of Supported Iron Porphyrins. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04871] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Qi Hua
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Kenneth E. Madsen
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Anne Marie Esposito
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Xinyi Chen
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Toby J. Woods
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Richard T. Haasch
- Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Shuting Xiang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Anatoly I. Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Division of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Timothy T. Fister
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Andrew A. Gewirth
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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23
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Tao X, Lu R, Ni L, Gridin V, Al-Hilfi SH, Qiu Z, Zhao Y, Kramm UI, Zhou Y, Müllen K. Facilitating the acidic oxygen reduction of Fe-N-C catalysts by fluorine-doping. MATERIALS HORIZONS 2022; 9:417-424. [PMID: 34762085 DOI: 10.1039/d1mh01307f] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As the alternatives to expensive Pt-based materials for the oxygen reduction reaction (ORR), iron/nitrogen co-doped carbon catalysts (FeNC) with dense FeNx active sites are promising candidates to promote the commercialization of proton exchange membrane fuel cells. Herein, we report a synthetic approach using perfluorotetradecanoic acid (PFTA)-modified metal-organic frameworks as precursors for the synthesis of fluorine-doped FeNC (F-FeNC) with improved ORR performance. The utilization of PFTA surfactants causes profound changes of the catalyst structure including F-doping into graphitic carbon, increased micropore surface area and Brunauer-Emmett-Teller (BET) surface area (up to 1085 m2 g-1), as well as dense FeNx sites. The F-FeNC catalyst exhibits an improved ORR activity with a high E1/2 of 0.83 V (VS. RHE) compared to the pristine FeNC material (E1/2 = 0.80 V). A fast decay occurs in the first 10 000 potential cycles for the F-FeNC catalyst, but high durability is still maintained up to another 50 000 cycles. Density functional theory calculations reveal that the strongly withdrawing fluorine atoms doped on the graphitic carbon can optimize the electronic structure of the FeNx active center and decrease the adsorption energy of ORR intermediates.
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Affiliation(s)
- Xiafang Tao
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany.
| | - Ruihu Lu
- State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
| | - Lingmei Ni
- Department of Materials and Earth Science and Department of Chemistry, Technical University Darmstadt, Otto-Berndt-Straße 3, 64287 Darmstadt, Germany.
| | - Vladislav Gridin
- Department of Materials and Earth Science and Department of Chemistry, Technical University Darmstadt, Otto-Berndt-Straße 3, 64287 Darmstadt, Germany.
| | - Samir H Al-Hilfi
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany.
| | - Zijie Qiu
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany.
| | - Yan Zhao
- State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
| | - Ulrike I Kramm
- Department of Materials and Earth Science and Department of Chemistry, Technical University Darmstadt, Otto-Berndt-Straße 3, 64287 Darmstadt, Germany.
| | - Yazhou Zhou
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany.
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany.
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24
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Chandrasekaran S, Zhang C, Shu Y, Wang H, Chen S, Nesakumar Jebakumar Immanuel Edison T, Liu Y, Karthik N, Misra R, Deng L, Yin P, Ge Y, Al-Hartomy OA, Al-Ghamdi A, Wageh S, Zhang P, Bowen C, Han Z. Advanced opportunities and insights on the influence of nitrogen incorporation on the physico-/electro-chemical properties of robust electrocatalysts for electrocatalytic energy conversion. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214209] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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25
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Menga D, Low JL, Li YS, Arčon I, Koyutürk B, Wagner F, Ruiz-Zepeda F, Gaberšček M, Paulus B, Fellinger TP. Resolving the Dilemma of Fe-N-C Catalysts by the Selective Synthesis of Tetrapyrrolic Active Sites via an Imprinting Strategy. J Am Chem Soc 2021; 143:18010-18019. [PMID: 34689551 DOI: 10.1021/jacs.1c04884] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Combining the abundance and inexpensiveness of their constituent elements with their atomic dispersion, atomically dispersed Fe-N-C catalysts represent the most promising alternative to precious-metal-based materials in proton exchange membrane (PEM) fuel cells. Due to the high temperatures involved in their synthesis and the sensitivity of Fe ions toward carbothermal reduction, current synthetic methods are intrinsically limited in type and amount of the desired, catalytically active Fe-N4 sites, and high active site densities have been out of reach (dilemma of Fe-N-C catalysts). We herein identify a paradigm change in the synthesis of Fe-N-C catalysts arising from the developments of other M-N-C single-atom catalysts. Supported by DFT calculations we propose fundamental principles for the synthesis of M-N-C materials. We further exploit the proposed principles in a novel synthetic strategy to surpass the dilemma of Fe-N-C catalysts. The selective formation of tetrapyrrolic Zn-N4 sites in a tailor-made Zn-N-C material is utilized as an active-site imprint for the preparation of a corresponding Fe-N-C catalyst. By successive low- and high-temperature ion exchange reactions, we obtain a phase-pure Fe-N-C catalyst, with a high loading of atomically dispersed Fe (>3 wt %). Moreover, the catalyst is entirely composed of tetrapyrrolic Fe-N4 sites. The density of tetrapyrrolic Fe-N4 sites is more than six times as high as for previously reported tetrapyrrolic single-site Fe-N-C fuel cell catalysts.
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Affiliation(s)
- Davide Menga
- Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München (TUM), Lichtenbergstraße 4, 85748 Garching, Germany
| | - Jian Liang Low
- Chair for Theoretical Chemistry, Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Yan-Sheng Li
- Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München (TUM), Lichtenbergstraße 4, 85748 Garching, Germany
| | - Iztok Arčon
- Laboratory of Quantum Optics, University of Nova Gorica, SI-5001 Nova Gorica, Slovenia.,Department of Low and Medium Energy Physics, Jožef Stefan Institute, Jamova 39, SI-1001 Ljubljana, Slovenia
| | - Burak Koyutürk
- Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München (TUM), Lichtenbergstraße 4, 85748 Garching, Germany
| | - Friedrich Wagner
- Department of Physics, Technische Universität München (TUM), James-Franck-Straße 1, 85748 Garching, Germany
| | - Francisco Ruiz-Zepeda
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 10, SI-1000 Ljubljana, Slovenia
| | - Miran Gaberšček
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 10, SI-1000 Ljubljana, Slovenia
| | - Beate Paulus
- Chair for Theoretical Chemistry, Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Tim-Patrick Fellinger
- Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München (TUM), Lichtenbergstraße 4, 85748 Garching, Germany.,Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 44-46, 12203 Berlin, Germany
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26
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Wang Y, You L, Zhou K. Origin of the N-coordinated single-atom Ni sites in heterogeneous electrocatalysts for CO 2 reduction reaction. Chem Sci 2021; 12:14065-14073. [PMID: 34760190 PMCID: PMC8565395 DOI: 10.1039/d1sc04094d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 10/06/2021] [Indexed: 12/01/2022] Open
Abstract
Heterogeneous Ni-N-C single-atom catalysts (SACs) have attracted great research interest regarding their capability in facilitating the CO2 reduction reaction (CO2RR), with CO accounting for the major product. However, the fundamental nature of their active Ni sites remains controversial, since the typically proposed pyridinic-type Ni configurations are inactive, display low selectivity, and/or possess an unfavorable formation energy. Herein, we present a constant-potential first-principles and microkinetic model to study the CO2RR at a solid-water interface, which shows that the electrode potential is crucial for governing CO2 activation. A formation energy analysis on several NiN x C4-x (x = 1-4) moieties indicates that the predominant Ni moieties of Ni-N-C SACs are expected to have a formula of NiN4. After determining the potential-dependent thermodynamic and kinetic energy of these Ni moieties, we discover that the energetically favorable pyrrolic-type NiN4 moiety displays high activity for facilitating the selective CO2RR over the competing H2 evolution. Moreover, model polarization curves and Tafel analysis results exhibit reasonable agreement with existing experimental data. This work highlights the intrinsic tetrapyrrolic coordination of Ni for facilitating the CO2RR and offers practical guidance for the rational improvement of SACs, and this model can be expanded to explore mechanisms of other electrocatalysis in aqueous solutions.
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Affiliation(s)
- Yu Wang
- Environmental Process Modelling Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University 1 CleanTech Loop Singapore 637141 Singapore
| | - Liming You
- Environmental Process Modelling Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University 1 CleanTech Loop Singapore 637141 Singapore
| | - Kun Zhou
- Environmental Process Modelling Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University 1 CleanTech Loop Singapore 637141 Singapore
- School of Mechanical and Aerospace Engineering, Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
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27
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Theis P, Wallace WDZ, Ni L, Kübler M, Schlander A, Stark RW, Weidler N, Gallei M, Kramm UI. Systematic study of precursor effects on structure and oxygen reduction reaction activity of FeNC catalysts. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2021; 379:20200337. [PMID: 34510925 DOI: 10.1098/rsta.2020.0337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/08/2021] [Indexed: 06/13/2023]
Abstract
In this work, the effect of porphyrin loading and template size is varied systematically to study its impact on the oxygen reduction reaction (ORR) activity and selectivity as followed by rotating ring disc electrode experiments in both acidic and alkaline electrolytes. The structural composition and morphology are investigated by 57Fe Mössbauer spectroscopy, transmission electron microscopy, Raman spectroscopy and Brunauer-Emmett-Teller analysis. It is shown that with decreasing template size, specifically the ORR performance towards fuel cell application gets improved, while at constant area loading of the iron precursor (here expressed in number of porphyrin layers), the iron signature does not change much. Moreover, it is well illustrated that too large area loadings result in the formation of undesired side phases that also cause a decrease in the performance, specifically in acidic electrolyte. Thus, if the impact of morphology is the focus of research it is important to consider the area loading rather than its weight loading. At constant weight loading, beside morphology the structural composition can also change and impact the catalytic performance. This article is part of the theme issue 'Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 2)'.
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Affiliation(s)
- Pascal Theis
- Catalysts and Electrocatalysts, Department of Chemistry, TU Darmstadt, Alarich-Weiss-Strasse 4, 64287 Darmstadt, Germany
| | - W David Z Wallace
- Catalysts and Electrocatalysts, Department of Chemistry, TU Darmstadt, Alarich-Weiss-Strasse 4, 64287 Darmstadt, Germany
- Graduate School Energy Science and Engineering, TU Darmstadt, Otto-Berndt-Strasse 3, 64287 Darmstadt, Germany
| | - Lingmei Ni
- Graduate School Energy Science and Engineering, TU Darmstadt, Otto-Berndt-Strasse 3, 64287 Darmstadt, Germany
- Catalysts and Electrocatalysts, Department of Materials and Earth Sciences, TU Darmstadt, Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Markus Kübler
- Catalysts and Electrocatalysts, Department of Chemistry, TU Darmstadt, Alarich-Weiss-Strasse 4, 64287 Darmstadt, Germany
- Graduate School Energy Science and Engineering, TU Darmstadt, Otto-Berndt-Strasse 3, 64287 Darmstadt, Germany
| | - Annika Schlander
- Chair in Polymer Chemistry, Universität des Saarlandes, Campus Saarbrücken, 66123 Saarbrücken, Germany
| | - Robert W Stark
- Physics of Surfaces, Department of Materials and Earth Sciences, TU Darmstadt, Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Natascha Weidler
- Catalysts and Electrocatalysts, Department of Materials and Earth Sciences, TU Darmstadt, Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
| | - Markus Gallei
- Chair in Polymer Chemistry, Universität des Saarlandes, Campus Saarbrücken, 66123 Saarbrücken, Germany
| | - Ulrike I Kramm
- Catalysts and Electrocatalysts, Department of Chemistry, TU Darmstadt, Alarich-Weiss-Strasse 4, 64287 Darmstadt, Germany
- Graduate School Energy Science and Engineering, TU Darmstadt, Otto-Berndt-Strasse 3, 64287 Darmstadt, Germany
- Catalysts and Electrocatalysts, Department of Materials and Earth Sciences, TU Darmstadt, Alarich-Weiss-Strasse 2, 64287 Darmstadt, Germany
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28
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29
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Ohyama J, Moriya M, Takahama R, Kamoi K, Kawashima S, Kojima R, Hayakawa T, Nabae Y. High Durability of a 14-Membered Hexaaza Macrocyclic Fe Complex for an Acidic Oxygen Reduction Reaction Revealed by In Situ XAS Analysis. JACS AU 2021; 1:1798-1804. [PMID: 34723282 PMCID: PMC8549110 DOI: 10.1021/jacsau.1c00309] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Indexed: 06/13/2023]
Abstract
Nonplatinum metal (NPM) catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs) have been developed; however, NPM catalysts still need to be improved in terms of both their catalytic activity and durability. To overcome these problems, an Fe active site contained within a more compact ligand than conventional, porphyrinic, 16-membered ring ligands, or more specifically, a hexaaza macrocyclic ligand with a 14-membered ring (14MR), was developed. In this study, the durability of the Fe-14MR complex was compared to that of Fe phthalocyanine (FePc), which has a 16-membered ring ligand, using in situ X-ray absorption spectroscopy; demetalation of the Fe complexes was directly observed during electrochemical experiments performed under acidic ORR conditions. It was found that Fe-14MR is significantly more resistant to demetalation than FePc during the ORR.
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Affiliation(s)
- Junya Ohyama
- Faculty
of Advanced Science and Technology, Kumamoto
University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Makoto Moriya
- College
of Science, Academic Institute, Shizuoka
University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Department
of Science, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Ryo Takahama
- Department
of Science, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Kazuki Kamoi
- Department
of Science, Graduate School of Integrated Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Shin Kawashima
- Corporate
Research & Development, Asahi Kasei
Corporation, 2767-11 Niihama, Shionasu, Kojima, Kurashiki, Okayama 711-8510, Japan
| | - Ryoichi Kojima
- Corporate
Research & Development, Asahi Kasei
Corporation, 2767-11 Niihama, Shionasu, Kojima, Kurashiki, Okayama 711-8510, Japan
| | - Teruaki Hayakawa
- Department
of Materials Science and Engineering, Tokyo
Institute of Technology, 2-12-1 S8-26, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yuta Nabae
- Department
of Materials Science and Engineering, Tokyo
Institute of Technology, 2-12-1 S8-26, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
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30
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Wang Y, Cui X, Peng L, Li L, Qiao J, Huang H, Shi J. Metal-Nitrogen-Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2100997. [PMID: 34218474 DOI: 10.1002/adma.202100997] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 04/02/2021] [Indexed: 06/13/2023]
Abstract
Metal-nitrogen-carbon (M-N-C) material with specifically coordinated configurations is a promising alternative to costly Pt-based catalysts. In the past few years, great progress is made in the studies of M-N-C materials, including the structure modulation and local coordination environment identification via advanced synthetic strategies and characterization techniques, which boost the electrocatalytic performances and deepen the understanding of the underlying fundamentals. In this review, the most recent advances of M-N-C catalysts with specifically coordinated configurations of M-Nx (x = 1-6) are summarized as comprehensively as possible, with an emphasis on the synthetic strategy, characterization techniques, and applications in typical electrocatalytic reactions of the oxygen reduction reaction, oxygen evolution reaction, hydrogen evolution reaction, CO2 reduction reaction, etc., along with mechanistic exploration by experiments and theoretical calculations. Furthermore, the challenges and potential perspectives for the future development of M-N-C catalysts are discussed.
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Affiliation(s)
- Yongxia Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, 2999 Ren'min North Road, Shanghai, 201620, China
| | - Xiangzhi Cui
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, P. R. China
| | - Luwei Peng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, 2999 Ren'min North Road, Shanghai, 201620, China
| | - Lulu Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, 2999 Ren'min North Road, Shanghai, 201620, China
| | - Jinli Qiao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, 2999 Ren'min North Road, Shanghai, 201620, China
- Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Road, Shanghai, 200092, China
| | - Haitao Huang
- Department of Applied Physics, Hong Kong Polytechnic University, 11 Yucai road, Kowloon, Hong Kong, 999077, China
| | - Jianlin Shi
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, China
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31
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Chen X, Zhao L, Wu K, Yang H, Zhou Q, Xu Y, Zheng Y, Shen Y, Liu S, Zhang Y. Bound oxygen-atom transfer endows peroxidase-mimic M-N-C with high substrate selectivity. Chem Sci 2021; 12:8865-8871. [PMID: 34257887 PMCID: PMC8246298 DOI: 10.1039/d1sc02170b] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 05/06/2021] [Indexed: 11/21/2022] Open
Abstract
Advances in nanoscience have stimulated the wide exploration of nanozymes as alternatives to enzymes. Nonetheless, nanozymes often catalyze multiple reactions and are not specialized to a specific substrate, restricting their broad application. Here, we report that the substrate selectivity of the peroxidase-mimic M-N-C can be significantly altered via forming bound intermediates with variable interactions with substrates according to the type of metal. Taking two essential reactions in chemical sensing as an example, Fe-N-C and Co-N-C showed opposite catalytic selectivity for the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) and 3-aminophthalhydrazide (luminol), respectively, by factors of up to 200-fold. It was revealed that specific transition metal-N coordination was the origin of the selective activation of H2O2 forming critically bound oxygen intermediates (M[double bond, length as m-dash]O) for oxygen-atom transfer and the consequent oxidization of substrates. Notably, owing to the embedded ligands in the rigid graphitic framework, surprisingly, the selectivity of M-N-C was even superior to that of commonly used horseradish peroxidase (HRP).
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Affiliation(s)
- Xinghua Chen
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
| | - Lufang Zhao
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
| | - Kaiqing Wu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
| | - Hong Yang
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
| | - Qing Zhou
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
| | - Yuan Xu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
| | - Yongjun Zheng
- Medical School, Southeast University Nanjing 210009 China
| | - Yanfei Shen
- Medical School, Southeast University Nanjing 210009 China
| | - Songqin Liu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
| | - Yuanjian Zhang
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
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32
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Saveleva VA, Ebner K, Ni L, Smolentsev G, Klose D, Zitolo A, Marelli E, Li J, Medarde M, Safonova OV, Nachtegaal M, Jaouen F, Kramm UI, Schmidt TJ, Herranz J. Potential-Induced Spin Changes in Fe/N/C Electrocatalysts Assessed by In Situ X-ray Emission Spectroscopy. Angew Chem Int Ed Engl 2021; 60:11707-11712. [PMID: 33605017 DOI: 10.1002/anie.202016951] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/09/2021] [Indexed: 11/12/2022]
Abstract
The commercial success of the electrochemical energy conversion technologies required for the decarbonization of the energy sector requires the replacement of the noble metal-based electrocatalysts currently used in (co-)electrolyzers and fuel cells with inexpensive, platinum-group metal-free analogs. Among these, Fe/N/C-type catalysts display promising performances for the reduction of O2 or CO2 , but their insufficient activity and stability jeopardize their implementation in such devices. To circumvent these issues, a better understanding of the local geometric and electronic structure of their catalytic active sites under reaction conditions is needed. Herein we shed light on the electronic structure of the molecular sites in two Fe/N/C catalysts by probing their average spin state with X-ray emission spectroscopy (XES). Chiefly, our in situ XES measurements reveal for the first time the existence of reversible, potential-induced spin state changes in these materials.
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Affiliation(s)
| | - Kathrin Ebner
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
| | - Lingmei Ni
- Technische Universität Darmstadt, Department of Chemistry and Department of Materials- and Earth Sciences, Otto-Berndt-Strasse 3, 64287, Darmstadt, Germany
| | - Grigory Smolentsev
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
| | - Daniel Klose
- ETH Zürich, Departement of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland
| | - Andrea Zitolo
- Synchrotron SOLEIL, L'orme des Merisiers, BP 48, Saint Aubin, 91192, Gif-sur-Yvette, France
| | - Elena Marelli
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
| | - Jingkun Li
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - Marisa Medarde
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
| | - Olga V Safonova
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
| | - Maarten Nachtegaal
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
| | | | - Ulrike I Kramm
- Technische Universität Darmstadt, Department of Chemistry and Department of Materials- and Earth Sciences, Otto-Berndt-Strasse 3, 64287, Darmstadt, Germany
| | - Thomas J Schmidt
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland.,ETH Zürich, Departement of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland
| | - Juan Herranz
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
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33
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Saveleva VA, Ebner K, Ni L, Smolentsev G, Klose D, Zitolo A, Marelli E, Li J, Medarde M, Safonova OV, Nachtegaal M, Jaouen F, Kramm UI, Schmidt TJ, Herranz J. Potential‐Induced Spin Changes in Fe/N/C Electrocatalysts Assessed by In Situ X‐ray Emission Spectroscopy. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016951] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Kathrin Ebner
- Paul Scherrer Institut Forschungsstrasse 111 5232 Villigen PSI Switzerland
| | - Lingmei Ni
- Technische Universität Darmstadt Department of Chemistry and Department of Materials- and Earth Sciences Otto-Berndt-Strasse 3 64287 Darmstadt Germany
| | - Grigory Smolentsev
- Paul Scherrer Institut Forschungsstrasse 111 5232 Villigen PSI Switzerland
| | - Daniel Klose
- ETH Zürich Departement of Chemistry and Applied Biosciences Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
| | - Andrea Zitolo
- Synchrotron SOLEIL L'orme des Merisiers, BP 48, Saint Aubin 91192 Gif-sur-Yvette France
| | - Elena Marelli
- Paul Scherrer Institut Forschungsstrasse 111 5232 Villigen PSI Switzerland
| | - Jingkun Li
- ICGM Univ. Montpellier CNRS ENSCM Montpellier France
| | - Marisa Medarde
- Paul Scherrer Institut Forschungsstrasse 111 5232 Villigen PSI Switzerland
| | - Olga V. Safonova
- Paul Scherrer Institut Forschungsstrasse 111 5232 Villigen PSI Switzerland
| | - Maarten Nachtegaal
- Paul Scherrer Institut Forschungsstrasse 111 5232 Villigen PSI Switzerland
| | | | - Ulrike I. Kramm
- Technische Universität Darmstadt Department of Chemistry and Department of Materials- and Earth Sciences Otto-Berndt-Strasse 3 64287 Darmstadt Germany
| | - Thomas J. Schmidt
- Paul Scherrer Institut Forschungsstrasse 111 5232 Villigen PSI Switzerland
- ETH Zürich Departement of Chemistry and Applied Biosciences Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
| | - Juan Herranz
- Paul Scherrer Institut Forschungsstrasse 111 5232 Villigen PSI Switzerland
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34
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Gallenkamp C, Kramm UI, Krewald V. Spectroscopic discernibility of dopants and axial ligands in pyridinic FeN 4 environments relevant to single-atom catalysts. Chem Commun (Camb) 2021; 57:859-862. [PMID: 33427246 DOI: 10.1039/d0cc06237e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Single-atom catalysts (SACs) activate small molecules, e.g. the oxygen reduction reaction is catalysed by FeNC materials. Because the nature of active site(s) in this type of SAC is unclear, spectroscopic and computational insights are needed to clarify the atomistic composition and electronic structure. Using quantum chemistry, we show that key features of [Fe{phen2A2}L]n+ complexes (A = CH, N with n = 0, A = O with n = 0, 2; L = OH-, Cl-) can be differentiated spectroscopically.
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Affiliation(s)
- Charlotte Gallenkamp
- Technical University of Darmstadt, Department of Chemistry, Alarich-Weiss-Str. 4, 64287 Darmstadt, Germany. and Technical University of Darmstadt, Department of Materials and Earth Sciences, Catalysts and Electrocatalysts Group, Otto-Bernd-Str. 3, 64287 Darmstadt, Germany
| | - Ulrike I Kramm
- Technical University of Darmstadt, Department of Materials and Earth Sciences, Catalysts and Electrocatalysts Group, Otto-Bernd-Str. 3, 64287 Darmstadt, Germany
| | - Vera Krewald
- Technical University of Darmstadt, Department of Chemistry, Alarich-Weiss-Str. 4, 64287 Darmstadt, Germany.
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35
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Ni L, Gallenkamp C, Paul S, Kübler M, Theis P, Chabbra S, Hofmann K, Bill E, Schnegg A, Albert B, Krewald V, Kramm UI. Active Site Identification in FeNC Catalysts and Their Assignment to the Oxygen Reduction Reaction Pathway by In Situ
57
Fe Mössbauer Spectroscopy. ADVANCED ENERGY AND SUSTAINABILITY RESEARCH 2021. [DOI: 10.1002/aesr.202000064] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lingmei Ni
- Catalysts and Electrocatalysts Group Department of Materials and Earth Sciences and Department of Chemistry TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
- Graduate School Energy Science and Engineering TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
| | - Charlotte Gallenkamp
- Catalysts and Electrocatalysts Group Department of Materials and Earth Sciences and Department of Chemistry TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
- Graduate School Energy Science and Engineering TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
- Department of Chemistry Theoretical Chemistry TU Darmstadt Alarich‐Weiss‐Str. 4 Darmstadt 64287 Germany
| | - Stephen Paul
- Catalysts and Electrocatalysts Group Department of Materials and Earth Sciences and Department of Chemistry TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
- Graduate School Energy Science and Engineering TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
| | - Markus Kübler
- Catalysts and Electrocatalysts Group Department of Materials and Earth Sciences and Department of Chemistry TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
- Graduate School Energy Science and Engineering TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
| | - Pascal Theis
- Catalysts and Electrocatalysts Group Department of Materials and Earth Sciences and Department of Chemistry TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
| | - Sonia Chabbra
- EPR Research Group Max‐Planck Institute for Chemical Energy Conversion Stiftstrasse 34‐36 Mülheim a.d.R. 45470 Germany
| | - Kathrin Hofmann
- Eduard‐Zintl‐Institute of Inorganic and Physical Chemistry Department of Chemistry TU Darmstadt Alarich‐Weiss‐Str. 12 Darmstadt 64287 Germany
| | - Eckhard Bill
- Department Inorganic Spectroscopy Max‐Planck Institute for Chemical Energy Conversion Stiftstrasse 34‐36 Mülheim a.d.R. 45470 Germany
| | - Alexander Schnegg
- EPR Research Group Max‐Planck Institute for Chemical Energy Conversion Stiftstrasse 34‐36 Mülheim a.d.R. 45470 Germany
| | - Barbara Albert
- Eduard‐Zintl‐Institute of Inorganic and Physical Chemistry Department of Chemistry TU Darmstadt Alarich‐Weiss‐Str. 12 Darmstadt 64287 Germany
| | - Vera Krewald
- Department of Chemistry Theoretical Chemistry TU Darmstadt Alarich‐Weiss‐Str. 4 Darmstadt 64287 Germany
| | - Ulrike I. Kramm
- Catalysts and Electrocatalysts Group Department of Materials and Earth Sciences and Department of Chemistry TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
- Graduate School Energy Science and Engineering TU Darmstadt Otto‐Berndt‐Str. 3 Darmstadt 64287 Germany
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36
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Ebner K, Ni L, Saveleva VA, Le Monnier BP, Clark AH, Krumeich F, Nachtegaal M, Luterbacher JS, Kramm UI, Schmidt TJ, Herranz J. 57Fe-Enrichment effect on the composition and performance of Fe-based O2-reduction electrocatalysts. Phys Chem Chem Phys 2021; 23:9147-9157. [DOI: 10.1039/d1cp00707f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we study how the performance and composition of platinum-group metal free catalysts of the Fe–N–C type are affected upon employing 57Fe-enriched precursors in their synthesis.
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Affiliation(s)
| | - Lingmei Ni
- TU Darmstadt
- Department of Chemistry and Department of Materials- and Earth Sciences
- Catalysts and Electrocatalysts Group
- 64287 Darmstadt
- Germany
| | | | | | | | - Frank Krumeich
- ETH Zürich
- Laboratory of Inorganic Chemistry
- 8093 Zürich
- Switzerland
| | | | - Jeremy S. Luterbacher
- EPFL Lausanne
- Laboratoire des Procédés Durables et Catalytiques
- 1015 Lausanne
- Switzerland
| | - Ulrike I. Kramm
- TU Darmstadt
- Department of Chemistry and Department of Materials- and Earth Sciences
- Catalysts and Electrocatalysts Group
- 64287 Darmstadt
- Germany
| | - Thomas J. Schmidt
- Paul Scherrer Institut
- 5232 Villigen PSI
- Switzerland
- ETH Zürich
- Laboratory of Physical Chemistry
| | - Juan Herranz
- Paul Scherrer Institut
- 5232 Villigen PSI
- Switzerland
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37
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Li J, Sougrati MT, Zitolo A, Ablett JM, Oğuz IC, Mineva T, Matanovic I, Atanassov P, Huang Y, Zenyuk I, Di Cicco A, Kumar K, Dubau L, Maillard F, Dražić G, Jaouen F. Identification of durable and non-durable FeNx sites in Fe–N–C materials for proton exchange membrane fuel cells. Nat Catal 2020. [DOI: 10.1038/s41929-020-00545-2] [Citation(s) in RCA: 173] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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38
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Luo F, Roy A, Silvioli L, Cullen DA, Zitolo A, Sougrati MT, Oguz IC, Mineva T, Teschner D, Wagner S, Wen J, Dionigi F, Kramm UI, Rossmeisl J, Jaouen F, Strasser P. P-block single-metal-site tin/nitrogen-doped carbon fuel cell cathode catalyst for oxygen reduction reaction. NATURE MATERIALS 2020; 19:1215-1223. [PMID: 32661387 DOI: 10.1038/s41563-020-0717-5] [Citation(s) in RCA: 130] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 05/25/2020] [Indexed: 05/22/2023]
Abstract
This contribution reports the discovery and analysis of a p-block Sn-based catalyst for the electroreduction of molecular oxygen in acidic conditions at fuel cell cathodes; the catalyst is free of platinum-group metals and contains single-metal-atom actives sites coordinated by nitrogen. The prepared SnNC catalysts meet and exceed state-of-the-art FeNC catalysts in terms of intrinsic catalytic turn-over frequency and hydrogen-air fuel cell power density. The SnNC-NH3 catalysts displayed a 40-50% higher current density than FeNC-NH3 at cell voltages below 0.7 V. Additional benefits include a highly favourable selectivity for the four-electron reduction pathway and a Fenton-inactive character of Sn. A range of analytical techniques combined with density functional theory calculations indicate that stannic Sn(IV)Nx single-metal sites with moderate oxygen chemisorption properties and low pyridinic N coordination numbers act as catalytically active moieties. The superior proton-exchange membrane fuel cell performance of SnNC cathode catalysts under realistic, hydrogen-air fuel cell conditions, particularly after NH3 activation treatment, makes them a promising alternative to today's state-of-the-art Fe-based catalysts.
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Affiliation(s)
- Fang Luo
- Department of Chemistry, The Electrochemical Energy, Catalysis and Material Science Laboratory, Chemical Engineering Division, Technical University Berlin, Berlin, Germany
| | - Aaron Roy
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - Luca Silvioli
- Nano-Science Center, Department of Chemistry, University Copenhagen, Copenhagen, Denmark
- Seaborg Technologies, Copenhagen, Denmark
| | - David A Cullen
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Andrea Zitolo
- Synchrotron SOLEIL, L'orme des Merisiers, BP 48, Saint Aubin, Gif-sur-Yvette, France
| | | | | | - Tzonka Mineva
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | - Detre Teschner
- The Fritz-Haber-Institute der Max-Planck-Gesellschaft, Inorganic Chemistry-Electronic Structure Group, Berlin, Germany
- Department of Heterogeneous Reaction, Max-Planck-Institute for Chemical Energy Conversion, Berlin, Germany
| | - Stephan Wagner
- Department of Chemistry and Department of Materials and Earth Sciences, Graduate School of Excellence Energy Science and Engineering, Technical University Darmstadt, Darmstadt, Germany
| | - Ju Wen
- Department of Chemistry, The Electrochemical Energy, Catalysis and Material Science Laboratory, Chemical Engineering Division, Technical University Berlin, Berlin, Germany
| | - Fabio Dionigi
- Department of Chemistry, The Electrochemical Energy, Catalysis and Material Science Laboratory, Chemical Engineering Division, Technical University Berlin, Berlin, Germany
| | - Ulrike I Kramm
- Department of Chemistry and Department of Materials and Earth Sciences, Graduate School of Excellence Energy Science and Engineering, Technical University Darmstadt, Darmstadt, Germany
| | - Jan Rossmeisl
- Nano-Science Center, Department of Chemistry, University Copenhagen, Copenhagen, Denmark.
| | | | - Peter Strasser
- Department of Chemistry, The Electrochemical Energy, Catalysis and Material Science Laboratory, Chemical Engineering Division, Technical University Berlin, Berlin, Germany.
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39
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Luo F, Wagner S, Onishi I, Selve S, Li S, Ju W, Wang H, Steinberg J, Thomas A, Kramm UI, Strasser P. Surface site density and utilization of platinum group metal (PGM)-free Fe-NC and FeNi-NC electrocatalysts for the oxygen reduction reaction. Chem Sci 2020; 12:384-396. [PMID: 34168745 PMCID: PMC8179675 DOI: 10.1039/d0sc03280h] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Pyrolyzed iron-based platinum group metal (PGM)-free nitrogen-doped single site carbon catalysts (Fe-NC) are possible alternatives to platinum-based carbon catalysts for the oxygen reduction reaction (ORR). Bimetallic PGM-free M1M2-NC catalysts and their active sites, however, have been poorly studied to date. The present study explores the active accessible sites of mono- and bimetallic Fe-NC and FeNi-NC catalysts. Combining CO cryo chemisorption, X-ray absorption and 57Fe Mössbauer spectroscopy, we evaluate the number and chemical state of metal sites at the surface of the catalysts along with an estimate of their dispersion and utilization. Fe L3,2-edge X-ray adsorption spectra, Mössbauer spectra and CO desorption all suggested an essentially identical nature of Fe sites in both monometallic Fe-NC and bimetallic FeNi-NC; however, Ni blocks the formation of active sites during the pyrolysis and thus causes a sharp reduction in the accessible metal site density, while with only a minor direct participation as a catalytic site in the final catalyst. We also use the site density utilization factor, ϕ SDsurface/bulk , as a measure of the metal site dispersion in PGM-free ORR catalysts. ϕ SDsurface/bulk enables a quantitative evaluation and comparison of distinct catalyst synthesis routes in terms of their ratio of accessible metal sites. It gives guidance for further optimization of the accessible site density of M-NC catalysts.
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Affiliation(s)
- Fang Luo
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technische Universität Berlin Straße des 17. 10623 Berlin Germany
| | - Stephan Wagner
- Department of Chemistry and Department of Materials and Earth Sciences, Catalysts and Electrocatalysts Group, Technical University of Darmstadt Otto-Berndt-Str. 3 64287 Darmstadt Germany
| | | | - Sören Selve
- Technische Universität Berlin, Center for Electron Microscopy (ZELMI) Straße des 17. Juni 135 10623 Berlin Germany
| | - Shuang Li
- Functional Materials, Department of Chemistry, Technical Universität Berlin Hardenbergstr. 40 Berlin 10623 Germany
| | - Wen Ju
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technische Universität Berlin Straße des 17. 10623 Berlin Germany
| | - Huan Wang
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technische Universität Berlin Straße des 17. 10623 Berlin Germany
| | - Julian Steinberg
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technische Universität Berlin Straße des 17. 10623 Berlin Germany
| | - Arne Thomas
- Functional Materials, Department of Chemistry, Technical Universität Berlin Hardenbergstr. 40 Berlin 10623 Germany
| | - Ulrike I Kramm
- Department of Chemistry and Department of Materials and Earth Sciences, Catalysts and Electrocatalysts Group, Technical University of Darmstadt Otto-Berndt-Str. 3 64287 Darmstadt Germany
| | - Peter Strasser
- The Electrochemical Catalysis, Energy and Materials Science Laboratory, Department of Chemistry, Technische Universität Berlin Straße des 17. 10623 Berlin Germany
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40
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Shang H, Zhou X, Dong J, Li A, Zhao X, Liu Q, Lin Y, Pei J, Li Z, Jiang Z, Zhou D, Zheng L, Wang Y, Zhou J, Yang Z, Cao R, Sarangi R, Sun T, Yang X, Zheng X, Yan W, Zhuang Z, Li J, Chen W, Wang D, Zhang J, Li Y. Engineering unsymmetrically coordinated Cu-S 1N 3 single atom sites with enhanced oxygen reduction activity. Nat Commun 2020; 11:3049. [PMID: 32546781 PMCID: PMC7297793 DOI: 10.1038/s41467-020-16848-8] [Citation(s) in RCA: 284] [Impact Index Per Article: 71.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 05/28/2020] [Indexed: 11/17/2022] Open
Abstract
Atomic interface regulation is thought to be an efficient method to adjust the performance of single atom catalysts. Herein, a practical strategy was reported to rationally design single copper atoms coordinated with both sulfur and nitrogen atoms in metal-organic framework derived hierarchically porous carbon (S-Cu-ISA/SNC). The atomic interface configuration of the copper site in S-Cu-ISA/SNC is detected to be an unsymmetrically arranged Cu-S1N3 moiety. The catalyst exhibits excellent oxygen reduction reaction activity with a half-wave potential of 0.918 V vs. RHE. Additionally, through in situ X-ray absorption fine structure tests, we discover that the low-valent Cuprous-S1N3 moiety acts as an active center during the oxygen reduction process. Our discovery provides a universal scheme for the controllable synthesis and performance regulation of single metal atom catalysts toward energy applications.
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Affiliation(s)
- Huishan Shang
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Xiangyi Zhou
- Laboratory for Computational Materials Engineering, Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
| | - Juncai Dong
- Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Ang Li
- Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, 100029, China
| | - Xu Zhao
- National Synchrotron Radiation Laboratory (NSRL), University of Science and Technology of China, Hefei, 230029, China
| | - Qinghua Liu
- National Synchrotron Radiation Laboratory (NSRL), University of Science and Technology of China, Hefei, 230029, China
| | - Yue Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China
| | - Jiajing Pei
- State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zhi Li
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Zhuoli Jiang
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Danni Zhou
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yu Wang
- Shanghai Synchrotron Radiation Facilities (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai, 201204, China
| | - Jing Zhou
- Shanghai Synchrotron Radiation Facilities (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai, 201204, China
| | - Zhengkun Yang
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Rui Cao
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Tingting Sun
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xin Yang
- Laboratory for Computational Materials Engineering, Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
| | - Xusheng Zheng
- National Synchrotron Radiation Laboratory (NSRL), University of Science and Technology of China, Hefei, 230029, China
| | - Wensheng Yan
- National Synchrotron Radiation Laboratory (NSRL), University of Science and Technology of China, Hefei, 230029, China
| | - Zhongbin Zhuang
- State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jia Li
- Laboratory for Computational Materials Engineering, Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
| | - Wenxing Chen
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.
| | - Dingsheng Wang
- Department of Chemistry, Tsinghua University, Beijing, 100084, China.
| | - Jiatao Zhang
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.
| | - Yadong Li
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
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41
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Kosmala T, Bibent N, Sougrati MT, Dražić G, Agnoli S, Jaouen F, Granozzi G. Stable, Active, and Methanol-Tolerant PGM-Free Surfaces in an Acidic Medium: Electron Tunneling at Play in Pt/FeNC Hybrid Catalysts for Direct Methanol Fuel Cell Cathodes. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01288] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Tomasz Kosmala
- Department of Chemical Sciences, University of Padua, Via Marzolo 1, 35131 Padova, Italy
| | - Nicolas Bibent
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - Goran Dražić
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana, Slovenia
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padua, Via Marzolo 1, 35131 Padova, Italy
| | | | - Gaetano Granozzi
- Department of Chemical Sciences, University of Padua, Via Marzolo 1, 35131 Padova, Italy
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42
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Heinz Maier‐Leibnitz Awards 2020. Angew Chem Int Ed Engl 2020; 59:6961. [DOI: 10.1002/anie.202003387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Heinz‐Maier‐Leibnitz‐Preise 2020. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003387] [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]
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44
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Sibul R, Kibena‐Põldsepp E, Ratso S, Kook M, Sougrati MT, Käärik M, Merisalu M, Aruväli J, Paiste P, Treshchalov A, Leis J, Kisand V, Sammelselg V, Holdcroft S, Jaouen F, Tammeveski K. Iron‐ and Nitrogen‐Doped Graphene‐Based Catalysts for Fuel Cell Applications. ChemElectroChem 2020. [DOI: 10.1002/celc.202000011] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Roberta Sibul
- Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia
| | | | - Sander Ratso
- Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia
| | - Mati Kook
- Institute of Physics University of Tartu W. Ostwald Str. 1 50411 Tartu Estonia
| | | | - Maike Käärik
- Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia
| | - Maido Merisalu
- Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia
- Institute of Physics University of Tartu W. Ostwald Str. 1 50411 Tartu Estonia
| | - Jaan Aruväli
- Institute of Ecology and Earth Sciences University of Tartu Vanemuise 46 51014 Tartu Estonia
| | - Päärn Paiste
- Institute of Ecology and Earth Sciences University of Tartu Vanemuise 46 51014 Tartu Estonia
| | - Alexey Treshchalov
- Institute of Physics University of Tartu W. Ostwald Str. 1 50411 Tartu Estonia
| | - Jaan Leis
- Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia
| | - Vambola Kisand
- Institute of Physics University of Tartu W. Ostwald Str. 1 50411 Tartu Estonia
| | - Väino Sammelselg
- Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia
- Institute of Physics University of Tartu W. Ostwald Str. 1 50411 Tartu Estonia
| | - Steven Holdcroft
- Department of Chemistry Simon Fraser University 8888 University Drive Burnaby BC V5A 1S6 Canada
| | - Frédéric Jaouen
- ICGM Univ. Montpellier, CNRS, ENSCM 34095 Montpellier France
| | - Kaido Tammeveski
- Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia
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45
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Kumar K, Dubau L, Mermoux M, Li J, Zitolo A, Nelayah J, Jaouen F, Maillard F. On the Influence of Oxygen on the Degradation of Fe‐N‐C Catalysts. Angew Chem Int Ed Engl 2020; 59:3235-3243. [DOI: 10.1002/anie.201912451] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Indexed: 12/18/2022]
Affiliation(s)
- Kavita Kumar
- Univ. Grenoble AlpesUniv. Savoie Mont BlancCNRSGrenoble INPLEPMI 38000 Grenoble France
| | - Laetitia Dubau
- Univ. Grenoble AlpesUniv. Savoie Mont BlancCNRSGrenoble INPLEPMI 38000 Grenoble France
| | - Michel Mermoux
- Univ. Grenoble AlpesUniv. Savoie Mont BlancCNRSGrenoble INPLEPMI 38000 Grenoble France
| | - Jingkun Li
- CNRSUniversité de MontpellierENSCMInstitut Charles Gerhardt Montpellier UMR 5253 2 Place Eugène Bataillon 34095 Montpellier France
| | - Andrea Zitolo
- Synchrotron SOLEIL L'orme des Merisiers, BP 48 Saint Aubin 91192 Gif-sur-Yvette France
| | - Jaysen Nelayah
- Université de ParisLaboratoire Matériaux et Phénomènes QuantiquesCNRS 75013 Paris France
| | - Frédéric Jaouen
- CNRSUniversité de MontpellierENSCMInstitut Charles Gerhardt Montpellier UMR 5253 2 Place Eugène Bataillon 34095 Montpellier France
| | - Frédéric Maillard
- Univ. Grenoble AlpesUniv. Savoie Mont BlancCNRSGrenoble INPLEPMI 38000 Grenoble France
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46
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Kumar K, Dubau L, Mermoux M, Li J, Zitolo A, Nelayah J, Jaouen F, Maillard F. On the Influence of Oxygen on the Degradation of Fe‐N‐C Catalysts. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201912451] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kavita Kumar
- Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS Grenoble INP LEPMI 38000 Grenoble France
| | - Laetitia Dubau
- Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS Grenoble INP LEPMI 38000 Grenoble France
| | - Michel Mermoux
- Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS Grenoble INP LEPMI 38000 Grenoble France
| | - Jingkun Li
- CNRS Université de Montpellier ENSCM Institut Charles Gerhardt Montpellier UMR 5253 2 Place Eugène Bataillon 34095 Montpellier France
| | - Andrea Zitolo
- Synchrotron SOLEIL L'orme des Merisiers, BP 48 Saint Aubin 91192 Gif-sur-Yvette France
| | - Jaysen Nelayah
- Université de Paris Laboratoire Matériaux et Phénomènes Quantiques CNRS 75013 Paris France
| | - Frédéric Jaouen
- CNRS Université de Montpellier ENSCM Institut Charles Gerhardt Montpellier UMR 5253 2 Place Eugène Bataillon 34095 Montpellier France
| | - Frédéric Maillard
- Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS Grenoble INP LEPMI 38000 Grenoble France
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Mineva T, Matanovic I, Atanassov P, Sougrati MT, Stievano L, Clémancey M, Kochem A, Latour JM, Jaouen F. Understanding Active Sites in Pyrolyzed Fe–N–C Catalysts for Fuel Cell Cathodes by Bridging Density Functional Theory Calculations and 57Fe Mössbauer Spectroscopy. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02586] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Tzonka Mineva
- Institut Charles Gerhardt Montpellier, UMR 5253, CNRS, Université Montpellier, ENSCM, Montpellier 34090, France
| | - Ivana Matanovic
- The Department of Chemical and Biological Engineering, Center for Micro-Engineered Materials (CMEM), University of New Mexico, Albuquerque, New Mexico 87131, United States
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Plamen Atanassov
- The Department of Chemical and Biological Engineering, Center for Micro-Engineered Materials (CMEM), University of New Mexico, Albuquerque, New Mexico 87131, United States
- Chemical & Biomolecular Engineering and National Fuel Cell Research Center, University of California, Irvine, California 92697-2580, United States
| | - Moulay-Tahar Sougrati
- Institut Charles Gerhardt Montpellier, UMR 5253, CNRS, Université Montpellier, ENSCM, Montpellier 34090, France
| | - Lorenzo Stievano
- Institut Charles Gerhardt Montpellier, UMR 5253, CNRS, Université Montpellier, ENSCM, Montpellier 34090, France
| | - Martin Clémancey
- Université Grenoble Alpes CNRS, CEA, DRF/IRIG/LCBM/pmb, 17 rue des Martyrs, Grenoble 38000, France
| | - Amélie Kochem
- Université Grenoble Alpes CNRS, CEA, DRF/IRIG/LCBM/pmb, 17 rue des Martyrs, Grenoble 38000, France
| | - Jean-Marc Latour
- Université Grenoble Alpes CNRS, CEA, DRF/IRIG/LCBM/pmb, 17 rue des Martyrs, Grenoble 38000, France
| | - Frédéric Jaouen
- Institut Charles Gerhardt Montpellier, UMR 5253, CNRS, Université Montpellier, ENSCM, Montpellier 34090, France
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