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Zong P, Jiao L, Li R, Jia X, Li X, Hu L, Chen C, Yan D, Zhai Y, Lu X. Catalase-like Fe Nanoparticles and Single Atoms Catalysts with Boosted Activity and Stability of Oxygen Reduction for Pesticide Detection. Anal Chem 2024; 96:10021-10027. [PMID: 38843243 DOI: 10.1021/acs.analchem.4c01445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2024]
Abstract
Although oxygen reduction reaction (ORR) as an effective signal amplification strategy has been extensively investigated for the improvement of sensitivity of electrochemical sensors, their activity and stability are still a great challenge. Herein, single-atom Fe (FeSA) and Fe nanoparticles (FeNP) on nitrogen-doped carbon (FeSA/FeNP) catalysts demonstrate a highly active and stable ORR performance, thus achieving the sensitive and stable electrochemical sensing of organophosphorus pesticides (OPs). Experimental investigations indicate that FeNP in FeSA/FeNP can improve the ORR activity by adjusting the electronic structure of FeSA active sites. Besides, owing to the excellent catalase-like activity, FeSA/FeNP can rapidly consume in situ generated H2O2 in the ORR process and avoid the leakage of active sites, thereby improving the stability of ORR. Utilizing the excellent ORR performance of FeSA/FeNP, an electrochemical sensor for OPs is established based on the thiocholine-induced poison of the active sites, demonstrating satisfactory sensitivity and stability. This work provides new insight into the design of high performance ORR catalysts for sensitive and stable electrochemical sensing.
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Affiliation(s)
- Peipei Zong
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Lei Jiao
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Ruimin Li
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Xiangkun Jia
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Xiaotong Li
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Lijun Hu
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Chengjie Chen
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Dongbo Yan
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Yanling Zhai
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Xiaoquan Lu
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, P. R. China
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2
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Wang G, Ren R, Feng X, Wang Y, Meng J, Jia J. First-principle calculations study of the ORR/OER electrocatalytic activity of ruthenium polyphthalocyanine axially modified with aliphatic thiol groups. Phys Chem Chem Phys 2024; 26:16207-16217. [PMID: 38804323 DOI: 10.1039/d4cp00424h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
In this study, the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalytic activity of ruthenium polyphthalocyanine axially modified with different aliphatic thiol groups, RuPPc-SR (SR = -SCH3, -SC2H5, -SC3H7, -SC4H9, -SC5H11, and -SC6H13), in an acidic medium were simulated using DFT. All -SR groups can effectively enhance the ORR and OER catalytic activities of RuPPc. The ORR and OER overpotentials of RuPPc-SC4H9 are 0.237 V and 0.436 V, respectively, which are far lower than those of RuPPc (0.960 V and 0.903 V). For RuPPc-SC4H9, the four C and S atoms of the -SC4H9 chain and Ru atom are coplanar, and thus, conjugate effects and inductive effects exist between the -SC4H9 chain and Ru atom. This makes the Ru atom exhibit the least positive Bader charge and smallest spin density, and the anti-bonding orbitals of dxz, dyz, and dz2 of the Ru atom shift below the Fermi level (Ef). This makes the adsorption strength of RuPPc-SC4H9 toward ORR and OER intermediates the weakest, which accelerates the reaction process, thus resulting in better ORR and OER catalytic activity. Therefore, the introduction of the aliphatic thiol groups might effectively improve the OER/ORR catalytic activity of RuPPc.
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Affiliation(s)
- Guilin Wang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, China.
- Department of Physics and Electronic Engineering, Yuncheng University, Yuncheng 044000, China
| | - Rongrong Ren
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, China.
| | - Xiaoqin Feng
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, China.
| | - Yuxin Wang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, China.
| | - Jie Meng
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, China.
| | - Jianfeng Jia
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, China.
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Ma X, Zhong J, Wang R, Li D, Li K, Luo L, Li C. Zeolitic imidazolate framework derived Fe catalyst electrocatalytic-driven atomic hydrogen for efficient reduction of nitrate to N 2. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134354. [PMID: 38653134 DOI: 10.1016/j.jhazmat.2024.134354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 04/16/2024] [Accepted: 04/17/2024] [Indexed: 04/25/2024]
Abstract
Excessive discharge of nitrogen-containing chemical products into the natural water environment leads to the serious environmental problem of nitrate-nitrogen pollution, threatening the ecological balance and human health. In this study, we propose an efficient denitrification electrochemical method utilizing iron-doped zeolite imidazolium framework derived defective nitrogen-doped carbon (d-FeNC) catalysts. The d-FeNC catalyst exhibited 97 % nitrate removal efficiency and 94 % total nitrogen (TN) removal, and the reaction rate constant was increased from 0.73 h-1 of the Fe-undoped electrocatalyst (d-NC) to 1.11 h-1. The successful synthesis of d-FeNC with carbon defect sites and encapsulated Fe was confirmed by in-depth characterization. In situ electron paramagnetic resonance (EPR) analysis in conjunction with cyclic voltammetry (CV) tests confirmed the carbon substrates with defect enhanced the trapping of atomic hydrogen (H*) on the catalyst surface. Density functional theory (DFT) calculations clarified the doping of Fe facilitated the adsorption of nitrate, resulting in contact of H* with nitrate on the catalyst surface. In the synergy of the defective state organic framework and metal Fe, H* and nitrate realized a collision process. The electrochemical denitrification system achieved an excellent nitrate removal capacity of 7587 mgN·g-1cat in high-concentration nitrate solution and showed excellent stability under various conditions. Overall, this study underscores the potential of defective iron-doped carbon catalysts for efficient electrocatalytic denitrification, providing a promising approach for sustainable wastewater treatment.
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Affiliation(s)
- Xi Ma
- Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, School of Chemistry and Environment, Yunnan Minzu University, Kunming, China
| | - Jiapeng Zhong
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Rongyue Wang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Dexuan Li
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
| | - Kai Li
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Lijun Luo
- Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, School of Chemistry and Environment, Yunnan Minzu University, Kunming, China.
| | - Chuanhao Li
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China.
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Cheng J, Zhang Z, Shao J, Wang T, Li R, Zhang W. Construction of an Axial Charge Transfer Channel Between Single-Atom Fe Sites and Nitrogen-Doped Carbon Supports for Boosting Oxygen Reduction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402583. [PMID: 38804883 DOI: 10.1002/smll.202402583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/13/2024] [Indexed: 05/29/2024]
Abstract
The introduction of axial-coordinated heteroatoms in Fe─N─C single-atom catalysts enables the significant enhancement of their oxygen reduction reaction (ORR) performance. However, the interaction relationship between the axial-coordinated heteroatoms and their carbon supports is still unclear. In this work, a gas phase surface treatment method is proposed to prepare a series of X─Fe─N─C (X = O, P, and S) single-atom catalysts with axial X-coordination on graphitic-N-rich carbon supports. Synchrotron-based X-ray absorption near-edge structure spectra and X-ray photoelectron spectroscopy indicate the formation of an axial charge transfer channel between the graphitic-N-rich carbon supports and single-atom Fe sites by axial O atoms in O─Fe─N─C. As a result, the O─Fe─N─C exhibits excellent ORR performance with a half-wave potential of 0.905 V versus RHE and a high specific capacity of 884 mAh g-1 for zinc-air battery, which is superior to other X─Fe─N─C catalysts without axial charge transfer and the commercial Pt/C catalyst. This work not only demonstrates a general synthesis strategy for the preparation of single-atom catalysts with axial-coordinated heteroatoms, but also presents insights into the interaction between single-atom active sites and doped carbon supports.
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Affiliation(s)
- Jiahao Cheng
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Zheng Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Jibin Shao
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Tang Wang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Rui Li
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Wang Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
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5
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Wang X, Huang R, Mao X, Liu T, Guo P, Sun H, Mao Z, Han C, Zheng Y, Du A, Liu J, Jia Y, Wang L. Coupling Ni Single Atomic Sites with Metallic Aggregates at Adjacent Geometry on Carbon Support for Efficient Hydrogen Peroxide Electrosynthesis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402240. [PMID: 38605604 DOI: 10.1002/advs.202402240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 03/06/2024] [Indexed: 04/13/2024]
Abstract
Single atomic catalysts have shown great potential in efficiently electro-converting O2 to H2O2 with high selectivity. However, the impact of coordination environment and introduction of extra metallic aggregates on catalytic performance still remains unclear. Herein, first a series of carbon-based catalysts with embedded coupling Ni single atomic sites and corresponding metallic nanoparticles at adjacent geometry is synthesized. Careful performance evaluation reveals NiSA/NiNP-NSCNT catalyst with precisely controlled active centers of synergetic adjacent Ni-N4S single sites and crystalline Ni nanoparticles exhibits a high H2O2 selectivity over 92.7% within a wide potential range (maximum selectivity can reach 98.4%). Theoretical studies uncover that spatially coupling single atomic NiN4S sites with metallic Ni aggregates in close proximity can optimize the adsorption behavior of key intermediates *OOH to achieve a nearly ideal binding strength, which thus affording a kinetically favorable pathway for H2O2 production. This strategy of manipulating the interaction between single atoms and metallic aggregates offers a promising direction to design new high-performance catalysts for practical H2O2 electrosynthesis.
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Affiliation(s)
- Xin Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Run Huang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Xin Mao
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Tian Liu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Institute of Energy, Hefei Comprehensive National Science Center, Department of Chemistry, Institute of Biomimetic Materials & Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Panjie Guo
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Hai Sun
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Zhelin Mao
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Chao Han
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Yarong Zheng
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230041, P. R. China
| | - Aijun Du
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Jianwei Liu
- Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Institute of Energy, Hefei Comprehensive National Science Center, Department of Chemistry, Institute of Biomimetic Materials & Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Yi Jia
- Petroleum and Chemical Industry Key Laboratory of Organic Electrochemical Synthesis, College of Chemical Engineering, Zhejiang Carbon Neutral Innovation Institute, Zhejiang University of Technology (ZJUT), Hangzhou, 310014, P. R. China
- Moganshan Institute ZJUT, Deqing, 313200, P. R. China
| | - Lei Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
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6
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Jaramillo D, Alvarez G, Díaz C, Pérez S, Muñoz Saldaña J, Sierra L, López BL, Moreno-Zuria A, Mohamedi M, Palacio R. Porous carbonaceous materials simultaneously dispersing N, Fe and Co as bifunctional catalysts for the ORR and OER: electrochemical performance in a prototype of a Zn-air battery. Dalton Trans 2024. [PMID: 38236157 DOI: 10.1039/d3dt03330a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Infiltration of the mesoporous structure of SBA-15 silica as a hard template with phenanthroline complexes of Fe3+ and Co2+ allowed the simultaneous dispersion of nitrogen, iron and cobalt species on the surface of the obtained carbonaceous CMK-3 silica replica, with potential as bifunctional heterogeneous catalysts for the cathodic oxygen reduction and evolution reactions (ORR and OER). The textural properties and mesopore structure depended on the composition of the material. The carbonaceous FeCoNCMK-3 (1/1), obtained with an Fe/Co molar ratio of 1/1, exhibited an ordered cylindrical mesoporous structure with a high mesopore volume, a rather homogeneous composition in terms of total and surface concentrations of iron and cobalt, and a balanced presence of pyridinic-, pyrrolic- and graphitic-N species. FeCoNCMK-3 (1/1) could improve the ORR kinetics by adsorption and reduction of O2 through the 4-electron mechanism with a current density of -17.37 mA cm-2, Eonset of 1.13 V vs. RHE and E1/2 of 0.75 V when compared to metal-free, monometallic or bimetallic electrocatalysts with a higher amount of cobalt than that of iron. In addition, FeCoNCMK-3 (1/1) exhibited activity for the OER, presenting lower values of Eonset (1.52 V), Ej10 (1.78 V) and the Tafel slope (76.3 mV dec-1) with respect to other catalysts. When evaluated as a cathode in a prototype of a Zn-air battery, FeCoNCMK-3 (1/1) exhibited a high open circuit voltage of 1.41 V, a peak power density of 66.84 mW cm-2, a large specific capacity of 818.88 mA h gZn-1, and cycling for 20 h but with deactivation upon cycling.
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Affiliation(s)
- Daniela Jaramillo
- Grupo de Investigación Ciencia de los Materiales, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 70 No 52 - 21, Medellín, Antioquia, 050010, Colombia.
| | - German Alvarez
- Grupo de Investigación Ciencia de los Materiales, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 70 No 52 - 21, Medellín, Antioquia, 050010, Colombia.
| | - Cristian Díaz
- Grupo de Investigación Ciencia de los Materiales, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 70 No 52 - 21, Medellín, Antioquia, 050010, Colombia.
| | - Sebastián Pérez
- Laboratorio Nacional de Proyección Térmica (CENAPROT), Centro de Investigación y de Estudios Avanzados del IPN, Libramiento Norponiente 2000 Fracc. Real de Juriquilla, 76230 Querétaro, Mexico
| | - Juan Muñoz Saldaña
- Laboratorio Nacional de Proyección Térmica (CENAPROT), Centro de Investigación y de Estudios Avanzados del IPN, Libramiento Norponiente 2000 Fracc. Real de Juriquilla, 76230 Querétaro, Mexico
| | - Ligia Sierra
- Grupo de Investigación Ciencia de los Materiales, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 70 No 52 - 21, Medellín, Antioquia, 050010, Colombia.
| | - Betty Lucy López
- Grupo de Investigación Ciencia de los Materiales, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 70 No 52 - 21, Medellín, Antioquia, 050010, Colombia.
| | - Alonso Moreno-Zuria
- Institut National de la Recherche Scientifique (INRS), Énergie Matériaux Télécommunications (EMT), 1650 Boulevard Lionel-Boulet, Varennes, Québec Canada, J3X1P7, Canada
| | - Mohamed Mohamedi
- Institut National de la Recherche Scientifique (INRS), Énergie Matériaux Télécommunications (EMT), 1650 Boulevard Lionel-Boulet, Varennes, Québec Canada, J3X1P7, Canada
| | - Ruben Palacio
- Grupo de Investigación Ciencia de los Materiales, Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 70 No 52 - 21, Medellín, Antioquia, 050010, Colombia.
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Pedersen A, Bagger A, Barrio J, Maillard F, Stephens IEL, Titirici MM. Atomic metal coordinated to nitrogen-doped carbon electrocatalysts for proton exchange membrane fuel cells: a perspective on progress, pitfalls and prospectives. JOURNAL OF MATERIALS CHEMISTRY. A 2023; 11:23211-23222. [PMID: 38013915 PMCID: PMC10629202 DOI: 10.1039/d3ta04711c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 10/05/2023] [Indexed: 11/29/2023]
Abstract
Proton exchange membrane fuel cells require reduced construction costs to improve commercial viability, which can be fueled by elimination of platinum as the O2 reduction electrocatalyst. The past 10 years has seen significant developments in synthesis, characterisation, and electrocatalytic performance of the most promising alternative electrocatalyst; single metal atoms coordinated to nitrogen-doped carbon (M-N-C). In this Perspective we recap some of the important achievements of M-N-Cs in the last decade, as well as discussing current knowledge gaps and future research directions for the community. We provide a new outlook on M-N-C stability and atomistic understanding with a set of original density functional theory simulations.
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Affiliation(s)
- Angus Pedersen
- Department of Materials, Royal School of Mines, Imperial College London London SW7 2AZ England UK
- Department of Chemical Engineering, Imperial College London London SW7 2AZ England UK
| | - Alexander Bagger
- Department of Materials, Royal School of Mines, Imperial College London London SW7 2AZ England UK
- Department of Physics, Technical University of Denmark Kongens Lyngby 2800 Denmark
| | - Jesús Barrio
- Department of Chemical Engineering, Imperial College London London SW7 2AZ England UK
| | - Frédéric Maillard
- University Grenoble Alpes, University Savoie-Mont-Blanc, CNRS, Grenoble-INP, LEPMI 38000 Grenoble France
| | - Ifan E L Stephens
- Department of Materials, Royal School of Mines, Imperial College London London SW7 2AZ England UK
| | - Maria-Magdalena Titirici
- Department of Chemical Engineering, Imperial College London London SW7 2AZ England UK
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University 2-1-1 Katahira, Aobaku Sendai Miyagi 980-8577 Japan
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8
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Yi SY, Choi E, Jang HY, Lee S, Park J, Choi D, Jang Y, Kang H, Back S, Jang S, Lee J. Insight into Defect Engineering of Atomically Dispersed Iron Electrocatalysts for High-Performance Proton Exchange Membrane Fuel Cell. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302666. [PMID: 37548180 DOI: 10.1002/adma.202302666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 07/11/2023] [Indexed: 08/08/2023]
Abstract
Atomically dispersed and nitrogen coordinated iron catalysts (Fe-NCs) demonstrate potential as alternatives to platinum-group metal (PGM) catalysts in oxygen reduction reaction (ORR). However, in the context of practical proton exchange membrane fuel cell (PEMFC) applications, the membrane electrode assembly (MEA) performances of Fe-NCs remain unsatisfactory. Herein, improved MEA performance is achieved by tuning the local environment of the Fe-NC catalysts through defect engineering. Zeolitic imidazolate framework (ZIF)-derived nitrogen-doped carbon with additional CO2 activation is employed to construct atomically dispersed iron sites with a controlled defect number. The Fe-NC species with the optimal number of defect sites exhibit excellent ORR performance with a high half-wave potential of 0.83 V in 0.5 M H2 SO4 . Variation in the number of defects allows for fine-tuning of the reaction intermediate binding energies by changing the contribution of the Fe d-orbitals, thereby optimizing the ORR activity. The MEA based on a defect-engineered Fe-NC catalyst is found to exhibit a remarkable peak power density of 1.1 W cm-2 in an H2 /O2 fuel cell, and 0.67 W cm-2 in an H2 /air fuel cell, rendering it one of the most active atomically dispersed catalyst materials at the MEA level.
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Affiliation(s)
- Seung Yeop Yi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Eunho Choi
- School of Mechanical Engineering, Kookmin National University, Seoul, 02707, Republic of Korea
| | - Ho Yeon Jang
- Department of Chemical and Biomolecular Engineering, Institute of Emergent Materials, Sogang University, Seoul, 04107, Republic of Korea
| | - Seonggyu Lee
- Department of Chemical Engineering, Kumoh National Institute of Technology (KIT), 61 Daehak-ro, Gumi, 39177, Republic of Korea
- Department of Energy Engineering Convergence, Kumoh National Institute of Technology (KIT), 61 Daehak-ro, Gumi, Gyeongbuk, 39177, Republic of Korea
| | - Jinkyu Park
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Daeeun Choi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Yeju Jang
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hojin Kang
- School of Mechanical Engineering, Kookmin National University, Seoul, 02707, Republic of Korea
| | - Seoin Back
- Department of Chemical and Biomolecular Engineering, Institute of Emergent Materials, Sogang University, Seoul, 04107, Republic of Korea
| | - Segeun Jang
- School of Mechanical Engineering, Kookmin National University, Seoul, 02707, Republic of Korea
| | - Jinwoo Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
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9
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Zhang L, Jin N, Yang Y, Miao XY, Wang H, Luo J, Han L. Advances on Axial Coordination Design of Single-Atom Catalysts for Energy Electrocatalysis: A Review. NANO-MICRO LETTERS 2023; 15:228. [PMID: 37831204 PMCID: PMC10575848 DOI: 10.1007/s40820-023-01196-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 08/28/2023] [Indexed: 10/14/2023]
Abstract
Single-atom catalysts (SACs) have garnered increasingly growing attention in renewable energy scenarios, especially in electrocatalysis due to their unique high efficiency of atom utilization and flexible electronic structure adjustability. The intensive efforts towards the rational design and synthesis of SACs with versatile local configurations have significantly accelerated the development of efficient and sustainable electrocatalysts for a wide range of electrochemical applications. As an emergent coordination avenue, intentionally breaking the planar symmetry of SACs by adding ligands in the axial direction of metal single atoms offers a novel approach for the tuning of both geometric and electronic structures, thereby enhancing electrocatalytic performance at active sites. In this review, we briefly outline the burgeoning research topic of axially coordinated SACs and provide a comprehensive summary of the recent advances in their synthetic strategies and electrocatalytic applications. Besides, the challenges and outlooks in this research field have also been emphasized. The present review provides an in-depth and comprehensive understanding of the axial coordination design of SACs, which could bring new perspectives and solutions for fine regulation of the electronic structures of SACs catering to high-performing energy electrocatalysis.
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Affiliation(s)
- Linjie Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China
| | - Na Jin
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350117, People's Republic of China
| | - Yibing Yang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China
| | - Xiao-Yong Miao
- State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics and Systems, School of Microelectronics, Fudan University, Shanghai, 200433, People's Republic of China
| | - Hua Wang
- ShenSi Lab, Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, 518110, People's Republic of China
| | - Jun Luo
- ShenSi Lab, Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, 518110, People's Republic of China.
| | - Lili Han
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China.
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