1
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Wang Q, Wei X, Wu Y, Ma G, Lei Z, Ren S. Bimetallic iron complex constructed clusters and single atoms neighboring structure to enhance oxygen reduction reaction performance. J Colloid Interface Sci 2024; 664:893-901. [PMID: 38493654 DOI: 10.1016/j.jcis.2024.03.097] [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: 12/03/2023] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 03/19/2024]
Abstract
Electrocatalysts are useful in lowering the energy barrier in oxygen reduction reaction (ORR). In this study, a catalyst with neighboring Fe single-atom and cluster is created by adsorbing a bimetallic Fe complex onto N-doped carbon and then pyrolyzing it. The resulting catalyst has good performance and a half-wave potential of 0.89 V. When used in Zn-air batteries, the voltage drops by only 8.13 % after 145 h of cycling. Theoretical studies show that electrons transfer from neighboring clusters to single atoms and the catalyst has a lower d-band center. These reduce intermediate desorption energy, hence improving ORR performance. This work demonstrates the capacity to adjust the catalytic properties through the interaction of diverse metal structures, which helps to design more efficient catalysts.
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Affiliation(s)
- Qingtao Wang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Xun Wei
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Yanxia Wu
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Guofu Ma
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Ziqiang Lei
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Shufang Ren
- Key Laboratory of Evidence Science Research and Application of Gansu Province, Gansu University of Political Science and Law, Lanzhou 730070, China.
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2
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Guo L, Wan X, Liu J, Guo X, Liu X, Shang J, Yu R, Shui J. Revealing Distance-Dependent Synergy between MnCo 2O 4 and Co-N-C in Boosting the Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2024; 16:3388-3395. [PMID: 38214267 DOI: 10.1021/acsami.3c15627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Synergistic effects have been applied to a variety of hybrid electrocatalysts to improve their activity and selectivity. Understanding the synergistic mechanism is crucial for the rational design of these types of catalysts. Here, we synthesize a MnCo2O4/Co-N-C hybrid electrocatalyst for the oxygen reduction reaction (ORR) and systematically investigate the synergy between MnCo2O4 nanoparticles and Co-N-C support. Theoretical simulations reveal that the synergy is closely related to the distance between active sites. For a pair of remote active sites, the ORR proceeds through the known 2e- + 2e- relay catalysis while the direct 4e- ORR occurs on a pair of adjacent active sites. Therefore, the formation of the undesired byproduct (H2O2) is inhibited at the interface region between MnCo2O4 and Co-N-C. This synergistic effect is further verified on an anion-exchange membrane fuel cell. The findings deepen the understanding of synergistic catalysis and will provide guidance for the rational design of hybrid electrocatalysts.
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Affiliation(s)
- Liming Guo
- School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China
| | - Xin Wan
- School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China
| | - Jieyuan Liu
- School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China
| | - Xu Guo
- School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China
| | - Xiaofang Liu
- School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China
| | - Jiaxiang Shang
- School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China
| | - Ronghai Yu
- School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China
| | - Jianglan Shui
- School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China
- Tianmushan Laboratory, Xixi Octagon City, Yuhang District, Hangzhou 310023, China
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3
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Chen R, Chen S, Wang L, Wang D. Nanoscale Metal Particle Modified Single-Atom Catalyst: Synthesis, Characterization, and Application. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2304713. [PMID: 37439396 DOI: 10.1002/adma.202304713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/04/2023] [Accepted: 07/07/2023] [Indexed: 07/14/2023]
Abstract
Single-atom catalysts (SACs) have attracted considerable attention in heterogeneous catalysis because of their well-defined active sites, maximum atomic utilization efficiency, and unique unsaturated coordinated structures. However, their effectiveness is limited to reactions requiring active sites containing multiple metal atoms. Furthermore, the loading amounts of single-atom sites must be restricted to prevent aggregation, which can adversely affect the catalytic performance despite the high activity of the individual atoms. The introduction of nanoscale metal particles (NMPs) into SACs (NMP-SACs) has proven to be an efficient approach for improving their catalytic performance. A comprehensive review is urgently needed to systematically introduce the synthesis, characterization, and application of NMP-SACs and the mechanisms behind their superior catalytic performance. This review first presents and classifies the different mechanisms through which NMPs enhance the performance of SACs. It then summarizes the currently reported synthetic strategies and state-of-the-art characterization techniques of NMP-SACs. Moreover, their application in electro/thermo/photocatalysis, and the reasons for their superior performance are discussed. Finally, the challenges and perspectives of NMP-SACs for the future design of advanced catalysts are addressed.
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Affiliation(s)
- Runze Chen
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Shenghua Chen
- National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, Xi'an, Shanxi, 710049, P. R. China
| | - Liqiang Wang
- School of Material Science and Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Dingsheng Wang
- Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
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4
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Jeong DS, Lee HJ, Park YJ, Hwang H, Ma KY, Kim M, Lim JS, Joo SH, Yang J, Shin HS. Langmuir-Blodgett Monolayer of Cobalt Phthalocyanine as Ultralow Loading Single-Atom Catalyst for Highly Efficient H 2O 2 Production. ACS NANO 2023. [PMID: 37991883 DOI: 10.1021/acsnano.3c08424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
The electrochemical production of H2O2 via the two-electron oxygen-reduction reaction (2e- ORR) has been actively studied using systems with atomically dispersed metal-nitrogen-carbon (M-N-C) structures. However, the development of well-defined M-N-C structures that restrict the migration and agglomeration of single-metal sites remains elusive. Herein, we demonstrate a Langmuir-Blodgett (LB) monolayer of cobalt phthalocyanine (CoPc) on monolayer graphene (LB CoPc/G) as a single-metal catalyst for the 2e- ORR. The as-prepared CoPc LB monolayer has a β-form crystalline structure with a lattice space for the facile adsorption of oxygen molecules on the cobalt active sites. The CoPc LB monolayer system provides highly exposed Co atoms in a well-defined structure without agglomeration, resulting in significantly improved catalytic activity, which is manifested by a very high H2O2 production rate per catalyst (31.04 mol gcat-1 h-1) and TOF (36.5 s-1) with constant production stability for 24 hours. To the best of our knowledge, the CoPc LB monolayer system exhibits the highest H2O2 production rate per active site. This fundamental study suggests that an LB monolayer of molecules with single-metal atoms as a well-defined structure works for single-atom catalysts.
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Affiliation(s)
- Da Sol Jeong
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Hoon Ju Lee
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Young Jin Park
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Hyuntae Hwang
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Kyung Yeol Ma
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Minsu Kim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - June Sung Lim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang Hoon Joo
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Jieun Yang
- Department of Chemistry, College of Science, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Hyeon Suk Shin
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
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5
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Dong A, Lin Y, Guo Y, Chen D, Wang X, Ge Y, Li Q, Qian J. Immobilization of iron phthalocyanine on MOF-derived N-doped carbon for promoting oxygen reduction in zinc-air battery. J Colloid Interface Sci 2023; 650:2056-2064. [PMID: 37330332 DOI: 10.1016/j.jcis.2023.06.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/17/2023] [Accepted: 06/08/2023] [Indexed: 06/19/2023]
Abstract
Functional carbon nanomaterials play a crucial role in the cathodic oxygen reduction reaction (ORR) for sustainable fuel cells and metal-air batteries. In this study, we propose an effective approach to immobilize iron phthalocyanines (FePc) by employing a porous N-doped carbon material, denoted as NC-1000, derived from a sheet-shaped coordination polymer. The resulting NC-1000 possesses substantial porosity and abundant pore defects. The nitrogen sites within NC-1000 not only facilitate FePc adsorption but also optimize the electron distribution at the Fe-N site. The FePc@NC-1000 composite material exhibits a significant number of active centers in the form of Fe-N4 moieties, showcasing satisfactory ORR activity. Specifically, it demonstrates an onset potential of 0.99 V, a positive half-wave potential of 0.86 V, a large limiting current of 5.96 mA cm-2, and a small Tafel slope of 44.41 mV dec-1. Additionally, theoretical calculations and experimental results confirm the favorable performance and durability of zinc-air batteries assembled using FePc@NC-1000, thereby highlighting their considerable potential for practical applications. Overall, this study provides a comprehensive exploration of the enhanced catalytic performance and increased stability of metal-organic framework-derived functional carbon nanomaterials as cost-effective, efficient, and stable catalysts for the ORR.
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Affiliation(s)
- Anrui Dong
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, PR China
| | - Yu Lin
- Comprehensive Technical Service Center of Wenzhou Customs, Wenzhou, 325000, PR China
| | - Yuanyuan Guo
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, PR China
| | - Dandan Chen
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, PR China
| | - Xian Wang
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, PR China
| | - Yongjie Ge
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, PR China
| | - Qipeng Li
- College of Chemistry and Chemical Engineering, Zhaotong University, Zhaotong, Yunnan 657000, PR China.
| | - Jinjie Qian
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, PR China.
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Chen Z, Lin Y, Zhou Y, Yang Y, Zhong Y, Xu M, Li W. A facile synthesis of FeS/Fe 3C nanoparticles highly dispersed on in situ grown N-doped CNTs as cathode electrocatalysts for microbial fuel cells. Phys Chem Chem Phys 2023; 25:21191-21199. [PMID: 37530031 DOI: 10.1039/d3cp02152a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
A novel composite of iron sulfide, iron carbide and nitrogen carbides (Nano-FeS/Fe3C@NCNTs) as a cathode electrocatalyst for microbial fuel cells (MFCs) is synthesized by a one-pot solid state reaction, which yields a unique configuration of FeS/Fe3C nanoparticles highly dispersed on in situ grown nitrogen-doped carbon nanotubes (NCNTs). The highly dispersed FeS/Fe3C nanoparticles possess large active sites, while the NCNTs provide an electronically conductive network. Consequently, the resultant Nano-FeS/Fe3C@NCNTs exhibit excellent electrocatalytic activity towards the oxygen reduction reaction (ORR), with a half-wave potential close to that of Pt/C (about 0.88 V vs. RHE), and enable MFCs to deliver a power density of 1.28 W m-2 after two weeks' operation, which is higher than that of MFCs with Pt/C as the cathode electrocatalyst (1.02 W m-2). Theoretical calculations and experimental data demonstrate that there is a synergistic effect between Fe3C and FeS in Nano-FeS/Fe3C@NCNTs. Fe3C presents a strong attraction and electron-donating tendency to oxygen molecules, serving as the main active component, while FeS reduces charge transfer resistance by transferring electrons to Fe3C, synergistically improving the kinetics of the ORR and power density of MFCs.
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Affiliation(s)
- Zhuoyue Chen
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Yingyu Lin
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Yuying Zhou
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Yuxian Yang
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Yaotang Zhong
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Mengqing Xu
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
- National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Key Lab. of ETESPG (GHEI), South China Normal University, Guangzhou 510006, China
| | - Weishan Li
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
- National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Key Lab. of ETESPG (GHEI), South China Normal University, Guangzhou 510006, China
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7
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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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8
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Guo XS, Huang ZY, Qi XW, Si LP, Zhang H, Liu HY. The optimization of iron porphyrin@MOF-5 derived Fe N C electrocatalysts for oxygen reduction reaction in zinc-air batteries. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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9
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Dong W, Wang T, Yang W, Song K, Zou Z. Carbon-coated Fe3C Derived from MIL-100 Growth on Covalent Triazine Framework in situ as an Efficient ORR Catalysts. Electrochem commun 2023. [DOI: 10.1016/j.elecom.2023.107477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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10
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Chen J, Zhao Y, Yang H, Zhang T, Fan L, Li C, Wang L. Directing oxygen reduction reaction selectivity towards hydrogen peroxide via electric double layer engineering. NANOSCALE 2023; 15:3832-3840. [PMID: 36728541 DOI: 10.1039/d2nr06352b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The electrochemical oxygen reduction reaction (ORR) has been recognized as a promising alternative for the sustainable production of H2O2. Here, we report a facile and effective strategy to promote ORR selectivity towards the 2e- product H2O2via electric double layer engineering. Specifically, in a model system using immobilized cobalt phthalocyanine as the electrocatalyst, H2O2 selectivity has been improved from below 60% to over 93%, and the intrinsic activity for H2O2 formation has been enhanced by more than 3 times upon the introduction of a cationic surfactant (i.e., cetyltrimethylammonium bromide, CTAB) into the electrolyte. Based on detailed kinetics analysis, we conclude that the accelerated H2O2 formation rate results from the reduced charge transfer resistance in the rate limiting step and the promoted oxygen uptake rate. We propose that the electric field strength across the electric double layer is enhanced via the self-assembled single-tail cationic surfactant layer at the electrode/electrolyte interface, which is the origin of the enhancement of the 2e- ORR performance.
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Affiliation(s)
- Jingyi Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore.
| | - Yilin Zhao
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore.
| | - Haozhou Yang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore.
| | - Tianyu Zhang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore.
| | - Lei Fan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore.
| | - Chunfeng Li
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore.
| | - Lei Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore.
- Centre for Hydrogen Innovations, National University of Singapore (Singapore), E8, 1 Engineering Drive 3, 117580, Singapore
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11
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Zhuang S, Li B, Wang X. Engineering the electronic structure of high performance FeCo bimetallic cathode catalysts for microbial fuel cell application in treating wastewater. ENVIRONMENTAL RESEARCH 2023; 216:114542. [PMID: 36228689 DOI: 10.1016/j.envres.2022.114542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/05/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
The development of high-performance, strong-durability and low-cost cathode catalysts toward oxygen reduction reaction (ORR) is of great significance for microbial fuel cells (MFCs). In this study, a series of bimetallic catalysts were synthesized by pyrolyzing a mixture of g-C3N4 and Fe, Co-tannic complex with various Fe/Co atomic ratios. The initial Fe/Co atomic ratio (3.5:0.5, 3:1, 2:2, 1:3) could regulate the electronic state, which effectively promoted the intrinsic electrocatalytic ORR activity. The alloy metal particles and metal-Nx sites presented on the catalyst surface. In addition, N-doped carbon interconnected network consisting of graphene-like and bamboo-like carbon nanotube structure derived from g-C3N4 provided more accessible active sites. The resultant Fe3Co1 catalyst calcined at 700 °C (Fe3Co1-700) exhibited high catalytic performance in neutral electrolyte with a half-wave potential of 0.661 V, exceeding that of the commercial Pt/C (0.6 V). As expected, the single chamber microbial fuel cell (SCMFC) with 1 mg/cm2 loading of Fe3Co1-700 catalyst as the cathode catalyst afforded a maximum power density of 1425 mW/m2, which was 10.5% higher than commercial Pt/C catalyst with the same loading (1290 mW/m2) and comparable to the Pt/C catalyst with 2.5 times higher loading ( 1430 mW/m2). Additionally, the Fe3Co1-700 also displayed better long-term stability over 1100 h than the Pt/C. This work provides an effective strategy for regulating the surface electronic state in the bimetallic electro-catalyst.
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Affiliation(s)
- Shiguang Zhuang
- Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Baitao 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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12
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Han Z, Cai W, Zhao S, Zhao Y, Bai J, Chen Q, Wang Y. Iron carbide nanoparticles supported on an N-doped carbon porous framework as a bifunctional material for electrocatalytic oxygen reduction and supercapacitors. NANOSCALE 2022; 14:18157-18166. [PMID: 36449324 DOI: 10.1039/d2nr05620h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Highly active and durable bifunctional materials are of pivotal importance for energy conversion and storage devices, yet a comprehensive understanding of their geometric and electronic influence on electrochemical activity is urgently needed. Fe-N-C materials with physical and chemical structural merits are considered as one of the promising candidates for efficient oxygen reduction reaction electrocatalysts and supercapacitor electrodes. Herein, Fe3C nanoparticles supported on a porous N-doped carbon framework (denoted as Fe3C/PNCF) were readily prepared by one-step chemical vapor deposition under the assistance of a NaCl salt template. The experiment results revealed that the as-synthesized Fe3C/PNCF nanocomposites successfully displayed attractive electrocatalytic oxygen reduction reaction (ORR) activity comparable to that of the Pt/C catalyst (E1/2 of 0.84 V and 0.83 V, respectively), and a superior capacitance of 385.3 F g-1 under 1 A g-1 for a supercapacitor. It's proposed that the increased pyridinic and graphitic N coordination on the hydrophilic porous framework provides more electrochemical active surface area for the storage and transport of electrolyte ions. Additionally, an appropriate d-band center created by the optimized adsorption function endows Fe3C/PNCF with excellent electrochemical properties. The results confirmed that the integration strategy of porous heterogeneous structure and accessible active sites balanced the complex relationship between geometry, electronic structure, and electrochemical activity. Our research provides a facile approach for fabricating multi-functional nanomaterials applicable in both ORR and supercapacitors in the future.
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Affiliation(s)
- Zengyu Han
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Wenfang Cai
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shifeng Zhao
- International Research Center for Renewable Energy (IRCRE), State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University, Xi'an 710049, China
| | - Yi Zhao
- International Research Center for Renewable Energy (IRCRE), State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University, Xi'an 710049, China
| | - Jirui Bai
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Qingyun Chen
- International Research Center for Renewable Energy (IRCRE), State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University, Xi'an 710049, China
| | - Yunhai Wang
- Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
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13
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Kim JH, Sa YJ, Lim T, Woo J, Joo SH. Steering Catalytic Selectivity with Atomically Dispersed Metal Electrocatalysts for Renewable Energy Conversion and Commodity Chemical Production. Acc Chem Res 2022; 55:2672-2684. [PMID: 36067418 DOI: 10.1021/acs.accounts.2c00409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Electrocatalysis is a key driver in promoting the paradigm shift from the current fossil-fuel-based hydrocarbon economy to a renewable-energy-driven hydrogen economy. The success of electrocatalysis hinges primarily on achieving high catalytic selectivity along with maximum activity and sustained longevity. Many electrochemical reactions proceed through multiple pathways, requiring highly selective catalysts.Atomically dispersed metal catalysts have emerged as a new frontier in heterogeneous catalysis. In addition to the widely perceived advantages of maximized active site utilization and substantially reduced metal content, they have shown different catalytic selectivities in some electrocatalytic reactions compared to the traditional nanoparticle (NP)-based catalysts. Although there have been significant advances in their synthesis, the highly energetic nature of a single atomic site has made the preparation of atomically dispersed metal catalysts rely on empiricism rather than rational design. Consequently, the structural comprehension of a single atomic site and the understanding of its unusual electrocatalytic selectivity remain largely elusive.In this Account, we describe our endeavors toward developing general synthetic approaches for atomically dispersed metal catalysts for the discovery of new selective and active electrocatalysts and to understand their catalytic nature. We introduce synthetic approaches to produce a wide range of nonprecious- and precious-metal-based atomically dispersed catalysts and control their coordination environments. Metallomacrocyclic-compound-driven top-down and metal salt/heteroatom layer-based bottom-up strategies, coupled with a SiO2-protective-layer-assisted method, have been developed that can effectively generate single atomic sites while mitigating the formation of metallic NPs. The low-temperature gas-phase ligand exchange method can reversibly tune the coordination structure of the atomically dispersed metal sites. We have used the prepared atomically dispersed metal catalysts as model systems to investigate their electrocatalytic reactivity for renewable energy conversion and commodity chemical production reactions, in which high selectivity is important. The reactions of our interest include the following: (i) the oxygen reduction reaction, where O2 is reduced to either H2O or H2O2 via the four-electron or two electron pathway, respectively; (ii) the CO2 reduction reaction, which should suppress the hydrogen evolution reaction; and (iii) the chlorine evolution reaction, which competes with the oxygen evolution reaction. The type of metal center to which the reactant is directly bound is found to be the most important in determining the selectivity, which originates from the dramatic changes in the binding energy of each metal center with the reactants. The coordination structure surrounding the metal center also has a significant effect on the selectivity; its control can modulate the oxidation state of the metal center, thereby altering the binding strength with the reactants.We envisage that future advances in the synthesis of atomically dispersed metal catalysts, combined with the growing power of computational, spectroscopic, and microscopic methods, will bring their synthesis to the level of rational design. Elaborately designed catalysts can overcome the current limits of catalytic selectivity, which will help establish the field of atomically dispersed metal catalysts as an important branch of catalysis.
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Affiliation(s)
- Jae Hyung Kim
- Clean Fuel Research Laboratory, Korea Institute of Energy Research, Daejeon34129, Republic of Korea
| | - Young Jin Sa
- Department of Chemistry, Kwangwoon University, Seoul01897, Republic of Korea
| | - Taejung Lim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan44919, Republic of Korea
| | - Jinwoo Woo
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul02792, Republic of Korea
| | - Sang Hoon Joo
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan44919, Republic of Korea
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14
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Fan J, Wang T, Thapaliya BP, Qiu L, Li M, Wang Z, Kobayashi T, Popovs I, Yang Z, Dai S. Fully Conjugated Poly(phthalocyanine) Scaffolds Derived from a Mechanochemical Approach Towards Enhanced Energy Storage. Angew Chem Int Ed Engl 2022; 61:e202207607. [DOI: 10.1002/anie.202207607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Juntian Fan
- Department of Chemistry Institute for Advanced Materials and Manufacturing University of Tennessee Knoxville TN 37996 USA
| | - Tao Wang
- Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Bishnu P. Thapaliya
- Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Liqi Qiu
- Department of Chemistry Institute for Advanced Materials and Manufacturing University of Tennessee Knoxville TN 37996 USA
| | - Meijia Li
- Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Zongyu Wang
- Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | | | - Ilja Popovs
- Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Zhenzhen Yang
- Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Sheng Dai
- Department of Chemistry Institute for Advanced Materials and Manufacturing University of Tennessee Knoxville TN 37996 USA
- Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
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15
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Baek DS, Joo SH. Non‐siliceous
ordered mesoporous materials via nanocasting for small molecule conversion electrocatalysis. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Du San Baek
- Department of Chemistry Ulsan National Institute of Science and Technology (UNIST) Ulsan Republic of Korea
| | - Sang Hoon Joo
- Department of Chemistry Ulsan National Institute of Science and Technology (UNIST) Ulsan Republic of Korea
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16
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Zhang D, Ding R, Zhang C, Tang Y, Yuan T, Dong Q, Bi L, Shi S, He Y. Efficient Synthesis of Fe/N-Doped Carbon Nanotube as Highly Active Catalysts for Oxygen Reduction Reaction in Alkaline Media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9310-9320. [PMID: 35861595 DOI: 10.1021/acs.langmuir.2c01130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
It is of significant implication to fabricate high-performance, durable and low-cost catalysts toward to oxygen reduction reaction (ORR) to drive commercial application of fuel cells. In our work, we synthesize the Fe/N-CNT catalyst via one-pot grinding combined with calcination using a mixture of carbamide, CNTs and iron salts as precursors, the as-synthesized catalysts show the structure that Fe nanoparticles are encapsulated in the tube of intertwined CNTs with abundant active sites. The catalyst is synthesized at 800 °C (Fe/N-CNT-800-20) obtain high graphitization degree and high N doped content, especially the high content and proportion of Fe-N and pyridinic-N, exhibiting outstanding ORR activity. Moreover, too high calcination temperature (850 °C) and high Fe content (25%) lead to the agglomeration of Fe during the calcination, which blocked some catalytic sites, leading to poor ORR activity. This facile synergy route will provide new thoughts for the fabrication and optimization of catalysts.
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Affiliation(s)
- Da Zhang
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
| | - Ruixin Ding
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
| | - Chuanqi Zhang
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
| | - Yuanzheng Tang
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
| | - Tiejian Yuan
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
| | - Qianpeng Dong
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
| | - Lansen Bi
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
| | - Song Shi
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
| | - Yan He
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon Materials, Qingdao University of Science and Technology, Qingdao 266061, China
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17
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Fan J, Wang T, Thapaliya BP, Qiu L, Li M, Wang Z, Kobayashi T, Popovs I, Yang Z, Dai S. Fully Conjugated Poly(phthalocyanine) Scaffolds Derived from a Mechanochemical Approach Towards Enhanced Energy Storage. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Juntian Fan
- UTK Chemistry: The University of Tennessee Knoxville Department of Chemistry Department of Chemistry 37831 Knoxville UNITED STATES
| | - Tao Wang
- ORNL: Oak Ridge National Laboratory Nanomaterials Chemistry UNITED STATES
| | | | - Liqi Qiu
- UTK: The University of Tennessee Knoxville Department of Chemistry UNITED STATES
| | - Meijia Li
- ORNL: Oak Ridge National Laboratory Chemical Sciences Division UNITED STATES
| | - Zongyu Wang
- ORNL: Oak Ridge National Laboratory Nanomaterials Chemistry UNITED STATES
| | | | - Ilja Popovs
- ORNL: Oak Ridge National Laboratory Chemical Sciences Division UNITED STATES
| | - Zhenzhen Yang
- Oak Ridge National Laboratory Chemical Sciences Division 1 Bethel Valley Rd 37830 Oak Ridge UNITED STATES
| | - Sheng Dai
- ORNL: Oak Ridge National Laboratory Chemical Sciences Division UNITED STATES
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18
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Burshtein TY, Tamakuwala K, Sananis M, Grinberg I, Samala NR, Eisenberg D. Understanding hydrazine oxidation electrocatalysis on undoped carbon. Phys Chem Chem Phys 2022; 24:9897-9903. [PMID: 35416204 DOI: 10.1039/d2cp00213b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbons are ubiquitous electrocatalytic supports for various energy-related transformations, especially in fuel cells. Doped carbons such as Fe-N-C materials are particularly active towards the oxidation of hydrazine, an alternative fuel and hydrogen carrier. However, there is little discussion of the electrocatalytic role of the most abundant component - the carbon matrix - towards the hydrazine oxidation reaction (HzOR). We present a systematic investigation of undoped graphitic carbons towards the HzOR in alkaline electrolyte. Using highly oriented pyrolytic graphite electrodes, as well as graphite powders enriched in either basal planes or edge defects, we demonstrate that edge defects are the most active catalytic sites during hydrazine oxidation electrocatalysis. Theoretical DFT calculations support and explain the mechanism of HzOR on carbon edges, identifying unsaturated graphene armchair defects as the most likely active sites. Finally, these findings explain the 'double peak' voltammetric feature observed on many doped carbons during the HzOR.
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Affiliation(s)
- Tomer Y Burshtein
- Schulich Faculty of Chemistry and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel.
| | - Kesha Tamakuwala
- Schulich Faculty of Chemistry and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel.
| | - Matan Sananis
- Schulich Faculty of Chemistry and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel.
| | - Ilya Grinberg
- Department of Chemistry, Bar-Ilan University, Ramat Gan, 5290002, Israel.
| | | | - David Eisenberg
- Schulich Faculty of Chemistry and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel.
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19
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Preparation of nitrogen-doped porous carbon modified by iron carbide and its application in an oxygen reduction reaction. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02041-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Venegas R, Zúñiga C, Zagal J, Toro A, Marco JF, Menendez N, Muñoz-Becerra K, Recio FJ. Pyrolyzed Fe‐N‐C catalysts templated by Fe3O4 nanoparticles. Understanding the role of N‐functions and Fe3C on the ORR activity and mechanism. ChemElectroChem 2022. [DOI: 10.1002/celc.202200115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - César Zúñiga
- University of Santiago de Chile: Universidad de Santiago de Chile Departamento de Química de los Materiales CHILE
| | - Jose Zagal
- Universidad de Santiago de Chile Departamento de Química de los Materiales CHILE
| | - Alejandro Toro
- Pontifical Catholic University of Chile: Pontificia Universidad Catolica de Chile Química Física CHILE
| | - Jose F. Marco
- Instituto de Química Física Rocasolano: Instituto de Quimica Fisica Rocasolano Sistemas de baja dimensionalidad, superficies y materia condensada SPAIN
| | - Nieves Menendez
- Universidad Autonoma de Madrid - Campus de Cantoblanco: Universidad Autonoma de Madrid Química Física Aplicada SPAIN
| | - Karina Muñoz-Becerra
- Universidad Bernardo O'Higgins Centro Integrativo de Biología y Química Aplicada CHILE
| | - Francisco Javier Recio
- Universidad Autonoma de Madrid - Campus de Cantoblanco: Universidad Autonoma de Madrid Química Física Aplicada Calle Tomás y ValienteCampus de Cantoblanco 28040 Madrid SPAIN
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21
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Fan L, Zhang L, Li X, Mei H, Li M, Liu Z, Kang Z, Tuo Y, Wang R, Sun D. Controlled synthesis of a porous single-atomic Fe–N–C catalyst with Fe nanoclusters as synergistic catalytic sites for efficient oxygen reduction. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00876a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A porous single-atomic Fe–N–C catalyst is prepared with the presence of Fe nanoclusters to increase the adsorption energy of OOH* on the single Fe atom and lower the energy barrier for OOH formation, thus improving the ORR activity.
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Affiliation(s)
- Lili Fan
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Ling Zhang
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Xuting Li
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Hao Mei
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Mengfei Li
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Zhanning Liu
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Zixi Kang
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Yongxiao Tuo
- College of New Energy, China University of Petroleum (East China), Qingdao, 266580, China
| | - Rongming Wang
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
| | - Daofeng Sun
- School of Materials Science and Engineering, College of Science, China University of Petroleum (East China), Qingdao 266580, China
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22
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Burshtein TY, Aias D, Wang J, Sananis M, Farber EM, Gazit OM, Grinberg I, Eisenberg D. Fe-N-C electrocatalysts in the oxygen and nitrogen cycles in alkaline media: the role of iron carbide. Phys Chem Chem Phys 2021; 23:26674-26679. [PMID: 34668906 DOI: 10.1039/d1cp03650e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Fe-N-C electrocatalysts hold a great promise for Pt-free energy conversion, driving the electrocatalysis of oxygen reduction and evolution, oxidation of nitrogen fuels, and reduction of N2, CO2, and NOx. Nevertheless, the catalytic role of iron carbide, a component of nearly every pyrolytic Fe-N-C material, is at the focus of a heated controversy. We now resolve the debate by examining a broad range of Fe3C sites, spanning across many typical size distributions and carbon environments. Removing Fe3C selectively by a non-oxidizing acid reveals its inactivity towards two representative reactions in alkaline media, oxygen reduction and hydrazine oxidation. The activity is assigned to other pre-existing sites, most probably Fe-Nx. DFT calculations prove that the Fe3C surface binds O and N intermediates too strongly to be catalytic. By settling the argument on the catalytic role of Fe3C in alkaline electrocatalysis, we hope to spur innovation in this critical field.
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Affiliation(s)
- Tomer Y Burshtein
- Schulich Faculty of Chemistry and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel.
| | - Denial Aias
- Department of Chemistry, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Jin Wang
- Department of Chemical Engineering and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel
| | - Matan Sananis
- Schulich Faculty of Chemistry and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel.
| | - Eliyahu M Farber
- Schulich Faculty of Chemistry and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel.
| | - Oz M Gazit
- Department of Chemical Engineering and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel
| | - Ilya Grinberg
- Department of Chemistry, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - David Eisenberg
- Schulich Faculty of Chemistry and the Grand Technion Energy Program, Technion - Israel Institute of Technology, Technion City, Haifa 3200003, Israel.
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23
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Zhong S, Yang X, Chen L, Tsumori N, Taguchi N, Xu Q. Interfacing with Fe-N-C Sites Boosts the Formic Acid Dehydrogenation of Palladium Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2021; 13:46749-46755. [PMID: 34581556 DOI: 10.1021/acsami.1c14009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Hierarchical micro-/mesoporous carbons with abundant Fe-N-C sites were prepared through one-step carbonization of a metal-organic framework (MOF) with sodium iron ethylenediaminetetraacetic acid [NaFe(III)EDTA], which can facilitate the nucleation and growth of ultrafine (∼1.4 nm) and highly dispersed palladium nanoparticles (Pd NPs). Interfacing Pd NPs with Fe-N-C sites has been demonstrated for the first time to boost the heterogeneous catalysis of hydrogen production from formic acid, affording an ultrahigh turnover frequency (TOF) value of 7361 h-1 at 323 K. The robust synergistic interactions between Pd NPs and Fe-N-C sites together with the small size effects of Pd NPs are responsible for the enhanced catalytic activity.
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Affiliation(s)
- Shan Zhong
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
- Graduate School of Engineering, Kobe University, Kobe, Hyogo 657-8501, Japan
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Xinchun Yang
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
| | - Liyu Chen
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), and Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Nobuko Tsumori
- Department of Applied Chemistry and Chemical Engineering, Toyama National College of Technology, 13 Hongo-machi, Toyama 939-8630, Japan
| | - Noboru Taguchi
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
| | - Qiang Xu
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
- Graduate School of Engineering, Kobe University, Kobe, Hyogo 657-8501, Japan
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), and Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
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24
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Mahmood A, Zhao B, Xie N, Niu L. Ionic liquids as precursors for Fe-N doped carbon nanotube electrocatalysts for the oxygen reduction reaction. NANOSCALE 2021; 13:15804-15811. [PMID: 34528989 DOI: 10.1039/d1nr03608d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Iron and nitrogen codoped carbons (Fe-N-C) have emerged as promising noble-metal-free catalysts for the oxygen reduction reaction (ORR). However, delicate control over their structure to enhance the catalytic efficiency is still challenging. Herein, we presented the synthesis of novel ionic-liquid (IL) derived nitrogen and iron co-doped carbon nanotube (CNT) based core-sheath nanostructures that can contribute to solving these challenges associated with the ORR. These nanostructures are synthesized by the adsorption of heteroatom containing ILs on the walls of CNTs followed by carbonization. The advantage of using an IL as a nitrogen source is that the obtained catalyst has a high level of N doping and a high surface area. Electrochemical characterization revealed that the N and Fe codoped CNT based core-sheath nanostructures exhibited superior catalytic activities toward the ORR under both alkaline and acidic conditions. Particularly in alkaline solution, the CNT/Fe-N-C catalysts showed better ORR activity compared to the commercial Pt/C catalyst. We suggest that the excellent electrocatalytic performance of CNT/Fe-N-C catalysts is attributed to: (i) the synergistic effect, which provides more catalytic FeNx sites for the ORR, due to the Fe and N co-doping and (ii) the high surface area and excellent electron transfer rate arising from the IL-derived core-sheath structure.
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Affiliation(s)
- Azhar Mahmood
- Guangzhou Key Laboratory of Sensing Materials & Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, c/o School of Civil Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
| | - Bolin Zhao
- Guangzhou Key Laboratory of Sensing Materials & Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, c/o School of Civil Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
| | - Nanhong Xie
- Research Center of Renewable Energy, Sinopec Research Institute of Petroleum Processing, Beijing 100083, P. R. China.
| | - Li Niu
- Guangzhou Key Laboratory of Sensing Materials & Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, c/o School of Civil Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
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25
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Li H, Chen X, Chen J, Shen K, Li Y. Hierarchically porous Fe,N-doped carbon nanorods derived from 1D Fe-doped MOFs as highly efficient oxygen reduction electrocatalysts in both alkaline and acidic media. NANOSCALE 2021; 13:10500-10508. [PMID: 34085689 DOI: 10.1039/d1nr01603b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Rationally designing low-cost yet highly efficient electrocatalysts for the oxygen reduction reaction (ORR) in both alkaline and acidic media remains highly challenging. Herein, we report the facile synthesis of Fe,N-doped carbon nanorods (denoted as Fe-N/C-NR) with abundant hierarchical pores and highly active sites by the pyrolysis of a one-dimensional (1D) Fe-doped zeolitic imidazolate framework (Fe-ZIF-8) as a self-sacrificing template. The unique 1D nanoarchitecture of the resultant Fe-N/C-NR can provide fast electron and electrolyte transport towards exposed active sites, and their hierarchically porous structures with large surface areas can efficiently facilitate mass diffusion and increase the density of exposed active sites. Furthermore, it is demonstrated that the coexistence of highly dispersed Fe-Nx sites and Fe3C/Fe nanoparticles (NPs) in these electrocatalysts can provide a large number of desired catalytic centers with highly intrinsic activity and structural stability. As a result, the optimized 5Fe-N/C-NR exhibits excellent catalytic activity for the ORR, with a high half-wave potential (E1/2) of 0.90 V vs. RHE in alkaline medium, superior to that of commercial Pt/C (0.86 V vs. RHE), and also a high E1/2 of 0.81 V vs. RHE in acidic medium, comparable to that of commercial Pt/C (0.81 V vs. RHE). Moreover, its robust ORR durability can far surpass that of commercial Pt/C in both acidic and alkaline media, further highlighting the merit of this MOF-templated strategy. Our findings might shed light on the rational design of cost-effective and highly efficient ORR electrocatalysts for practical applications.
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Affiliation(s)
- Hao Li
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Xiao Chen
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Junying Chen
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Kui Shen
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Yingwei Li
- Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
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26
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Iron‐Containing Nitrogen‐Doped Carbon Nanomaterials Prepared via NaCl Template as Efficient Electrocatalysts for the Oxygen Reduction Reaction. ChemElectroChem 2021. [DOI: 10.1002/celc.202100571] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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27
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do Rêgo UA, Sgarbi R, Lopes T, dos Santos CC, Tanaka AA, Ticianelli EA. Effect of Substrate and Pyrolysis Atmosphere of FeNx Materials on Electrocatalysis of the Oxygen Reduction Reaction. Electrocatalysis (N Y) 2021. [DOI: 10.1007/s12678-021-00671-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Zhu T, Sha Y, Zhang H, Huang Y, Gao X, Ling M, Lin Z. Embedding Fe 3C and Fe 3N on a Nitrogen-Doped Carbon Nanotube as a Catalytic and Anchoring Center for a High-Areal-Capacity Li-S Battery. ACS APPLIED MATERIALS & INTERFACES 2021; 13:20153-20161. [PMID: 33877793 DOI: 10.1021/acsami.1c03358] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The biggest obstacles of putting lithium-sulfur batteries into practice are the sluggish redox kinetics of polysulfides and serious "shuttle effect" under high sulfur mass loading and lean-electrolyte conditions. Herein, Fe3C/Fe3N@nitrogen-doped carbon nanotubes (NCNTs) as multifunctional sulfur hosts are designed to realize high-areal-capacity Li-S batteries. The Fe3N and Fe3C particles attached to NCNT can promote the conversion of polysulfides. Besides, NCNT can not only enhance the chemisorption of polysulfides but also increase the special surface area and electrical conductivity by constructing a three-dimensional skeleton network. Integrating the merits of high electrical conductivity, high catalytic activity, and strong chemical binding interaction with lithium polysulfides (LiPSs) to achieve in situ anchoring conversion, the Fe3C/Fe3N@NCNT multifunctional hosts realize high sulfur mass loading and accelerate redox kinetics. The novel Fe3C/Fe3N@NCNT/S composite cathode exhibits steady cycle ability and a high areal capacity of 9.10 mAh cm-2 with a sulfur loading of 13.12 mg cm-2 at 2.20 mA cm-2 after 50 cycles.
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Affiliation(s)
- Tuyuan Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, P. R. China
| | - Ying Sha
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, P. R. China
| | - Huiwen Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, P. R. China
| | - Yingchong Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, P. R. China
| | - Xuehui Gao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, P. R. China
| | - Min Ling
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zhan Lin
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
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Abstract
The discussion concerning cooperativity in supported single-atom (SA) catalysis is often limited to the metal-support interaction, which is certainly important, but which is not the only lever for modifying the catalytic performance. Indeed, if the interaction between the SA and the support, which can be seen as a solid ligand presenting its own specificities that fix the first coordination sphere of the metal, plays a central role as in homogeneous catalysis, other factors can strongly contribute to modification of the activity, selectivity and stability of SAs. Therefore, in this mini-review, we briefly summarize the importance of the support (oxide, carbon or a second metal) in SA photo- electro- and thermal-catalysis (support-assisted operation), and concentrate on other types of cooperativities that in some cases enable previously impossible reaction pathways on supported metal SAs. This includes topics that are not specific to SA catalysis, such as metal-ligand or heterobimetallic cooperativity, and cooperativity which is SA-specific such as nanoparticle-SA or mixed-valence SA cooperativity.
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Affiliation(s)
- Philippe Serp
- LCC, CNRS-UPR 8241, ENSIACET, Université de Toulouse, 31030 Toulouse, France.
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30
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Wu G, Shi J, Dong H, Nie Y, Wang Y, Chen Y, Li D, Linghu Y, He Z, Wang C, Guo L. Bimetallic Fe and Co supported on the N‐doped mesoporous carbon frameworks with enhanced oxygen reduction reaction performance via high‐gravity technology. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Guangping Wu
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Jinhua Shi
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Hongbo Dong
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Yao Nie
- Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry Chongqing Normal University Chongqing P. R. China
| | - Yanzhong Wang
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Yanjun Chen
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Dan Li
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Yaoyao Linghu
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Zhenfeng He
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Chao Wang
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
| | - Li Guo
- School of Chemical Engineering and Technology North University of China Taiyuan P. R. China
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31
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Zhang M, Ma Z, Song H. Preparation and Application of Fe-N Co-Doped GNR@CNT Cathode Oxygen Reduction Reaction Catalyst in Microbial Fuel Cells. NANOMATERIALS 2021; 11:nano11020377. [PMID: 33540737 PMCID: PMC7912981 DOI: 10.3390/nano11020377] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 01/24/2021] [Accepted: 01/25/2021] [Indexed: 11/16/2022]
Abstract
Through one-step pyrolysis, non-noble-metal oxygen reduction reaction (ORR) electrocatalysts were constructed from ferric trichloride, melamine, and graphene nanoribbon@carbon nanotube (GNR@CNT), in which a portion of the multiwall carbon nanotube is unwrapped/unzipped radially, and thus graphene nanoribbon is exposed. In this study, Fe-N/GNR@CNT materials were used as an air-cathode electrocatalyst in microbial fuel cells (MFCs) for the first time. The Fe-N/C shows similar power generation ability to commercial Pt/C, and its electron transfer number is 3.57, indicating that the ORR process primarily occurs with 4-electron. Fe species, pyridinic-N, graphitic-N, and oxygen-containing groups existing in GNR@CNT frameworks are likely to endow the electrocatalysts with good ORR performance, suggesting that a GNR@CNT-based carbon supporter would be a good candidate for the non-precious metal catalyst to replace Pt-based precious metal.
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Affiliation(s)
| | - Zhaokun Ma
- Correspondence: (Z.M.); (H.S.); Tel.: +86-10-64434916 (Z.M.); +86-10-64434916 (H.S.)
| | - Huaihe Song
- Correspondence: (Z.M.); (H.S.); Tel.: +86-10-64434916 (Z.M.); +86-10-64434916 (H.S.)
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32
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Lee B, Kim JG, Pak C. Investigation of fabrication methods for a cathode using a non-precious metal catalyst in polymer electrolyte membrane fuel cell. KOREAN J CHEM ENG 2020. [DOI: 10.1007/s11814-020-0643-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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33
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Zhao C, Li B, Liu J, Zhang Q. Intrinsic Electrocatalytic Activity Regulation of M–N–C Single‐Atom Catalysts for the Oxygen Reduction Reaction. Angew Chem Int Ed Engl 2020; 60:4448-4463. [DOI: 10.1002/anie.202003917] [Citation(s) in RCA: 196] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Chang‐Xin Zhao
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 P. R. China
| | - Bo‐Quan Li
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 P. R. China
| | - Jia‐Ning Liu
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 P. R. China
| | - Qiang Zhang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 P. R. China
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34
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Zhao C, Li B, Liu J, Zhang Q. Intrinsische elektrokatalytische Aktivitätssteuerung von M‐N‐C‐Einzelatom‐Katalysatoren für die Sauerstoffreduktionsreaktion. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003917] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Chang‐Xin Zhao
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Peking 100084 V.R. China
| | - Bo‐Quan Li
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Peking 100084 V.R. China
| | - Jia‐Ning Liu
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Peking 100084 V.R. China
| | - Qiang Zhang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Peking 100084 V.R. China
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35
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Alam KM, Kumar P, Gusarov S, Kobryn AE, Kalra AP, Zeng S, Goswami A, Thundat T, Shankar K. Synthesis and Characterization of Zinc Phthalocyanine-Cellulose Nanocrystal (CNC) Conjugates: Toward Highly Functional CNCs. ACS APPLIED MATERIALS & INTERFACES 2020; 12:43992-44006. [PMID: 32530267 DOI: 10.1021/acsami.0c07179] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report highly fluorescent cellulose nanocrystals (CNCs) formed by conjugating a carboxylated zinc phthalocyanine (ZnPc) to two different types of CNCs. The conjugated nanocrystals (henceforth called ZnPc@CNCs) were bright green in color and exhibited absorption and emission maxima at ∼690 and ∼715 nm, respectively. The esterification protocol employed to covalently bind carboxylated ZnPc to surface hydroxyl group rich CNCs was expected to result in a monolayer of ZnPc on the surface of the CNCs. However, dynamic light scattering (DLS) studies indicated a large increase in the hydrodynamic radius of CNCs following conjugation to ZnPc, which suggests the binding of multiple ZnPc molecular layers on the CNC surface. This binding could be through co-facial π-stacking of ZnPc, where ZnPc metallophthalocyanine rings are horizontal to the CNC surface. The other possible binding mode would give rise to conjugated systems where ZnPc metallophthalocyanine rings are oriented vertically on the CNC surface. Density functional theory based calculations showed stable geometry following the conjugation protocol that involved covalently attached ester bond formation. The conjugates demonstrated superior performance for potential sensing applications through higher photoluminescence quenching capabilities compared to pristine ZnPc.
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Affiliation(s)
- Kazi M Alam
- Department of Electrical & Computer Engineering, University of Alberta, 9211-116 St., Edmonton, AB T6G 1H9, Canada
| | - Pawan Kumar
- Department of Electrical & Computer Engineering, University of Alberta, 9211-116 St., Edmonton, AB T6G 1H9, Canada
| | - Sergey Gusarov
- Nanotechnology Research Centre, National Research Council Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Alexander E Kobryn
- Nanotechnology Research Centre, National Research Council Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Aarat P Kalra
- Department of Electrical & Computer Engineering, University of Alberta, 9211-116 St., Edmonton, AB T6G 1H9, Canada
- Department of Physics, Faculty of Science, University of Alberta, Edmonton, T6G 1H9, Canada
| | - Sheng Zeng
- Department of Electrical & Computer Engineering, University of Alberta, 9211-116 St., Edmonton, AB T6G 1H9, Canada
| | - Ankur Goswami
- Department of Electrical & Computer Engineering, University of Alberta, 9211-116 St., Edmonton, AB T6G 1H9, Canada
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi 11016, India
| | - Thomas Thundat
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 1H9, Canada
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Karthik Shankar
- Department of Electrical & Computer Engineering, University of Alberta, 9211-116 St., Edmonton, AB T6G 1H9, Canada
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36
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Nandan R, Devi HR, Kumar R, Singh AK, Srivastava C, Nanda KK. Inner Sphere Electron Transfer Promotion on Homogeneously Dispersed Fe-N x Centers for Energy-Efficient Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2020; 12:36026-36039. [PMID: 32677817 DOI: 10.1021/acsami.0c08086] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The study reports the optimized incorporation of pyridinic nitrogen in nitrogen-doped carbon nanotubes (CNTs) to realize effective Fe-Nx centers throughout the framework. The study unveils nitrogen as a valuable asset to promote the homogeneous dispersion of Fe moieties throughout the CNT framework, which is a necessary component to institute uniform Fe-Nx centers. In addition, pyridinic nitrogen causes disruption in strongly delocalized π-electrons, which impart electron-withdrawing nature in the carbon matrix, resulting in an anodic shift in oxygen reduction reaction (ORR) onset potential (Eonset). The direct interaction of Fe-Nx with O2, as evidenced by poisoning and computational studies, ensures the preferential inner sphere electron transfer mechanism. Despite the alkaline medium, the outer sphere electron transfer mechanism was muted, with suppressed HO2- generation, preferential 4e- reduction pathways, and excellent cyclic stability. The study indicates the dependency of ORR half-wave potential on the electron transfer mechanism. The poisoning study unveils the direct involvement of Fe-Nx electroactive centers in facilitating ORR in alkaline medium. It further indicates a noticable increase (up to ∼25%) in peroxide generation-an unwanted ORR intermediate-and concomitant reduction in average electron transfer no. per oxygen molecule.
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Affiliation(s)
- Ravi Nandan
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Hemam Rachna Devi
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Ritesh Kumar
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | | | - Chandan Srivastava
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Karuna Kar Nanda
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
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37
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Teng W, Fan J, Zhang WX. Iron-Catalyzed Selective Denitrification over N-Doped Mesoporous Carbon. ACS APPLIED MATERIALS & INTERFACES 2020; 12:28091-28099. [PMID: 32413255 DOI: 10.1021/acsami.0c03953] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Electrocatalytic denitrification has been considered as one of the most promising technologies to selectively reduce excessive nitrogen oxyanions to benign dinitrogen in polluted water. The development of nonprecious metal catalysts with high performance for the denitrification is imperative but still a great challenge. Herein, we report an iron-based electrocatalyst for high-efficiency and selective denitrification. This nanocatalyst is prepared by template assembly of iron-based metal organic frameworks on surface-functionalized bimodal mesoporous carbon and subsequent pyrolysis under argon atmosphere. It contains well-dispersed FeNx sites and Fe nanoparticles (most of them are wrapped by N-doped graphitic carbon), with high surface area (1080 m2 g-1) and uniform mesopore and micropore (5.0 and 1.7 nm) for the construction of electrodes. Experimental results confirm that the catalyst can achieve an excellent nitrate removal capacity of 3410 mg N/g Fe, along with a reduction efficiency up to 87% and N2 selectivity of 81% in neutral electrolyte (100 mg/L NO3--N and 0.1 M Na2SO4) within 24 h. It is proposed that the active FeNx sites cooperated with sufficient Fe nanoparticles to be conducive to adsorption of O in NO3- on the catalyst for the improved performance. The material also presents long-term durability and good adaptability in the range of pH 5-9 and simulated neutral wastewater, mainly contributed by the protection of the mesostructure and graphitic N-doped carbon. These findings open the door to rational design of nonprecious metal iron-based functional electrocatalysts for water purification and environmental remediation.
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Affiliation(s)
- Wei Teng
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, P. R. China
| | - Jianwei Fan
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, P. R. China
| | - Wei-Xian Zhang
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, P. R. China
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38
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She W, Xie Q, Huang Y, Xie C, Zhang X, Sun M, Wang F, Xiao J. Microstructure Engineering of Fe/Fe 3C-Decorated Metal-Nitrogen-Carbon Mesoporous Nanospheres via a Self-Template Method for Enhancing Oxygen Reduction Activity. ACS APPLIED MATERIALS & INTERFACES 2020; 12:28065-28074. [PMID: 32453551 DOI: 10.1021/acsami.0c02021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report a self-template and facile pyrolysis method to synthesize Fe/Fe3C-decorated metal-nitrogen-carbon mesoporous nanospheres, of which preserved plum-like and hollow structures can be simply engineered via controlling the thickness of the outermost polydopamine layer in the precursors. The preserved plum-like structure is demonstrated to show a large electrochemically active surface area and facilitate fast charge transfer, in comparison with the hollow one. The catalytic activities of metal-nitrogen-carbon and nitrogen-doped carbon active sites in the outer carbon layer toward oxygen reduction are improved under the activation of the encased Fe species. Hence, preserved plum-like structures exhibit excellent catalytic kinetics toward the oxygen reduction reaction in alkaline media. The mass activity of 21.0 mA mgcatalyst-1 at 0.9 V vs RHE is achieved and the half-wave potential is 50 mV more positive than that of the Pt/C catalyst with the same mass loading. Moreover, the outer carbon layer endows the tolerance of strong acidic and alkaline environments, resulting in good durability. Our study proposes a simple strategy for the rational design of novel transition metal carbide-based catalysts, making it a promising candidate for replacing platinum-group metal catalysts in low-temperature fuel cells.
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Affiliation(s)
- Wanxin She
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Qianru Xie
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Yaohui Huang
- School of Life Sciences, Central China Normal University, Wuhan 430079, P. R. China
| | - Chuyi Xie
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Xiangyu Zhang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Mingchen Sun
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Feng Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
| | - Junwu Xiao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Department of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
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39
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Chen Z, Li Y, Liu B, Wang K, Cao Y. Solvent‐Free Chemical Approach to Synthesize Co Nanoparticles Supported on N‐doped Porous Carbon for Efficient Electrocatalytic Oxygen Reduction. ChemCatChem 2020. [DOI: 10.1002/cctc.201902376] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Zixi Chen
- Key Laboratory of Energy Materials Chemistry Ministry of Education Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry Xinjiang University Urumqi 830046, Xinjiang P. R. China
| | - Yizhao Li
- Key Laboratory of Energy Materials Chemistry Ministry of Education Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry Xinjiang University Urumqi 830046, Xinjiang P. R. China
- School of Chemistry and Chemical Engineering Xinjiang University Urumqi 830046, Xinjiang P. R. China
| | - Baolin Liu
- Key Laboratory of Energy Materials Chemistry Ministry of Education Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry Xinjiang University Urumqi 830046, Xinjiang P. R. China
| | - Kun Wang
- Key Laboratory of Energy Materials Chemistry Ministry of Education Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry Xinjiang University Urumqi 830046, Xinjiang P. R. China
| | - Yali Cao
- Key Laboratory of Energy Materials Chemistry Ministry of Education Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry Xinjiang University Urumqi 830046, Xinjiang P. R. China
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40
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Jin E, Yang Y, Cui L. Confining Iron Carbide Growth in Porous Carbon to Improve the Electrocatalytic Performance for Oxygen Reduction Reaction. Electrocatalysis (N Y) 2020. [DOI: 10.1007/s12678-020-00596-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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Yan XH, Meng Z, Prabhu P, Xu H, Xue T, Fang G, Lee JM. Self-Supported Fe–N–C Electrocatalyst via Pyrolysis of EDTAFeNa Adsorbed on SBA-15 for the Oxygen Reduction Reaction. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Xiang-Hui Yan
- School of Materials Science and Engineering, North Minzu University, Yinchuan, Ningxia 750021, China
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637459, Singapore
- Key Laboratory of Powder Material & Advance Ceramics, North Minzu University, Yinchuan, Ningxia 750021, China
| | - Ziwei Meng
- School of Materials Science and Engineering, North Minzu University, Yinchuan, Ningxia 750021, China
| | - P. Prabhu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637459, Singapore
| | - Hao Xu
- School of Materials Science and Engineering, North Minzu University, Yinchuan, Ningxia 750021, China
| | - Tong Xue
- School of Materials Science and Engineering, North Minzu University, Yinchuan, Ningxia 750021, China
| | - Guoli Fang
- School of Materials Science and Engineering, North Minzu University, Yinchuan, Ningxia 750021, China
| | - Jong-Min Lee
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637459, Singapore
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42
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Liu J, Xie Y, Gao Q, Cao F, Qin L, Wu Z, Zhang W, Li H, Zhang C. 1D MOF‐Derived N‐Doped Porous Carbon Nanofibers Encapsulated with Fe
3
C Nanoparticles for Efficient Bifunctional Electrocatalysis. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901244] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jiang‐Tao Liu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology 230009 Hefei China
| | - Yan Xie
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology 230009 Hefei China
| | - Qiang Gao
- Hefei National Research Center for Physical Sciences at Microscale University of Science and Technology of China 230026 Hefei China
| | - Fu‐Hu Cao
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology 230009 Hefei China
| | - Ling Qin
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology 230009 Hefei China
| | - Zhen‐Yu Wu
- Hefei National Research Center for Physical Sciences at Microscale University of Science and Technology of China 230026 Hefei China
| | - Wang Zhang
- Nanyang Environmental and Water Research Institute Nanyang Technological University 639798 Singapore Singapore
| | - Hao Li
- Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics 621999 Mianyang China
| | - Chuan‐Ling Zhang
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology 230009 Hefei China
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43
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Karuppannan M, Park JE, Bae HE, Cho YH, Kwon OJ. A nitrogen and fluorine enriched Fe/Fe 3C@C oxygen reduction reaction electrocatalyst for anion/proton exchange membrane fuel cells. NANOSCALE 2020; 12:2542-2554. [PMID: 31932838 DOI: 10.1039/c9nr08631e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nitrogen-doped carbon-encapsulated non-noble metals are promising electrocatalytic alternatives to Pt for the oxygen reduction reaction (ORR). Herein, we describe the efficient synthesis of nitrogen- and fluorine-doped carbon-encapsulated Fe/Fe3C (NFC@Fe/Fe3C) crystals from a Fe-poly(aniline-fluoro-aniline) co-polymer and demonstrate their use as efficient ORR electrocatalysts in acidic and alkaline environments. X-ray diffraction patterns, scanning electron microscopy, transmission electron microscopy, Raman spectra, and X-ray photoelectron spectroscopy are used to determine the structural properties of NFC@Fe/Fe3C. Of the NFC@Fe/Fe3C catalysts, NFC@Fe/Fe3C-9 demonstrates superior ORR electrocatalytic activity in both alkaline and acidic environments. NFC@Fe/Fe3C-9 follows a four-electron-transfer ORR pathway in alkaline and acidic media. Under alkaline conditions, NFC@Fe/Fe3C-9 displays a half-wave potential (E1/2) as 0.870 V, which is 16 mV higher than that of Pt/C, and its durability decay is 26 mV over 50 000 cycles. In acidic medium, the NFC@Fe/Fe3C-9 electrode shows inferior ORR performance than does Pt/C, but it is more durable, with only 27 mV decay over 30 000 cycles. A single cell performance of NFC@Fe/Fe3C-9 was tested with a proton-exchange membrane fuel cells (PEMFC) and an anion-exchange membrane fuel cell (AEMFC) with an active area of 5 cm2. The PEMFC single cell exhibits the maximum power density of 237 mW cm-2 with a back pressure of 250 kPa, while the AEMFC delivers a maximum power density of 96 mW cm-2 without back pressure.
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Affiliation(s)
- Mohanraju Karuppannan
- Department of Energy and Chemical Engineering, Incheon National University, 119 Academy-ro, Yeonsu-Gu, Incheon 22012, Republic of Korea.
| | - Ji Eun Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyo Eun Bae
- Department of Energy and Chemical Engineering, Incheon National University, 119 Academy-ro, Yeonsu-Gu, Incheon 22012, Republic of Korea.
| | - Yong-Hun Cho
- Department of Chemical Engineering, Kangwon National University, Samcheok, Kangwon-do 25913, Republic of Korea.
| | - Oh Joong Kwon
- Department of Energy and Chemical Engineering, Incheon National University, 119 Academy-ro, Yeonsu-Gu, Incheon 22012, Republic of Korea.
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Lou Y, Liu J, Liu M, Wang F. Hexagonal Fe2N Coupled with N-Doped Carbon: Crystal-Plane-Dependent Electrocatalytic Activity for Oxygen Reduction. ACS Catal 2020. [DOI: 10.1021/acscatal.9b03716] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yiwei Lou
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jingjun Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Min Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Feng Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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45
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Ma T, Zhang L, Wen Z. Editorial: Key Electrochemical Energy Reactions Catalyzed by Nanomaterials. Front Chem 2020; 7:881. [PMID: 31921790 PMCID: PMC6932976 DOI: 10.3389/fchem.2019.00881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 12/06/2019] [Indexed: 11/13/2022] Open
Affiliation(s)
- Tianyi Ma
- Discipline of Chemistry, University of Newcastle, Callaghan, NSW, Australia
| | - Lei Zhang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - Zhenhai Wen
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
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46
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Nabae Y, Nagata S, Kusaba K, Aoki T, Hayakawa T, Tanida H, Imai H, Hori K, Yamamoto Y, Arai S, Ohyama J. Magnetic purification of non-precious metal fuel cell catalysts for obtaining atomically dispersed Fe centers. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02304f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
This paper proposes a facile magnetic purification approach for obtaining atomically dispersed Fe centers in non-precious metal fuel cell catalysts, which has been evidenced by X-ray absorption spectroscopy and microscopy.
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47
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Oxygen reduction reaction mechanism and kinetics on M-NxCy and M@N-C active sites present in model M-N-C catalysts under alkaline and acidic conditions. J Solid State Electrochem 2019. [DOI: 10.1007/s10008-019-04436-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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48
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Gu L, Chu Y, Du H, Zhang Y, Zhao J, Xie Y. Supramolecular Iron Complex Formed Between Nitrogen Riched Phenanthroline Derivative and Iron With Improved Oxygen Reduction Activity in Alkaline Electrolyte. Front Chem 2019; 7:622. [PMID: 31572713 PMCID: PMC6753333 DOI: 10.3389/fchem.2019.00622] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/29/2019] [Indexed: 11/13/2022] Open
Abstract
In this work, the synthesis and evaluation of a new type non-noble metal oxygen reduction reaction (ORR) catalyst is reported. The catalyst is a complex containing iron ions and multiple N active sites, which displayed excellent oxygen reduction activity in alkaline medium. 2-(2-(4-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)pyridin-2-yl)pyridin-4-yl)-1H-imidazo[4,5-f][1,10]phenanthroline (PIPhen) was synthesized and used as a ligand to form a rich nitrogen iron coordination complex (Fe-PIPhen), and the complex was then loaded onto the carbon powder to form the target catalyst of Fe-PIPhen/C. The physical characterization of the catalyst was conducted by using Scanning Electron Microscopy (SEM), nitrogen adsorption-desorption and X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller analysis etc. Electrochemical characterizations were realized by taking cyclic voltammetry (CV), linear sweep voltammetry (LSV) and rotating ring disk electrode (RRDE). The results show that Fe-PIPhen/C possesses the good performance; it exhibits a high electrocatalytic activity, which is mainly via a four electron ORR pathway, with a low hydrogen peroxide yield of 2.58%. And, the average electron transfer number of 3.93 was obtained in alkaline electrolyte. In summary, Fe-PIPhen/C will likely become a promising alternative to Pt catalyst in fuel cell.
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Affiliation(s)
- Lin Gu
- Shandong Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng, China
| | - Ya Chu
- Shandong Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng, China
| | - Hongmei Du
- Shandong Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng, China
| | - Yan Zhang
- Shandong Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng, China
| | - Jinsheng Zhao
- Shandong Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng, China
| | - Yu Xie
- Key Laboratory of Jiangxi Province for Persistant Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, China
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49
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Wang Y, Chen L, Mao Z, Peng L, Xiang R, Tang X, Deng J, Wei Z, Liao Q. Controlled synthesis of single cobalt atom catalysts via a facile one-pot pyrolysis for efficient oxygen reduction and hydrogen evolution reactions. Sci Bull (Beijing) 2019; 64:1095-1102. [PMID: 36659770 DOI: 10.1016/j.scib.2019.06.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/31/2019] [Accepted: 06/06/2019] [Indexed: 01/21/2023]
Abstract
Metal-nitrogen doped carbon catalysts (M-N/C) with abundantly accessible M-Nx sites, particularly single metal atom M-N/C (SAM-N/C), have been developed as a substitute for expensive Pt-based catalysts. These catalysts are used to increase the efficiency of otherwise sluggish oxygen reduction reactions (ORR) and hydrogen evolution reactions (HER). However, although the agglomerated metal nanoparticles are usually easy to form, they are very difficult to remove due to the protective surface-coating carbon layers, a factor that significantly hampers SAM-N/C fabrication. Herein, we report a one-step pyrolysis approach to successfully fabricate single cobalt atom Co-N/C (SACo-N/C) by using a Co2+-SCN- coordination compound as the metal precursor. Thanks to the decomposition of Co2+-SCN- compound at lower temperature than that of carbon layer deposition, Co-rich particles grow up to larger ones before carbon layers formation. Even though encapsulated by the carbon layers, it is difficult for the large Co-rich particle to be completely sealed. And thus, it makes the Co atoms possible to escape from incomplete carbon layer, to coordinate with nitrogen atoms, and to form SACo-N/C catalysts. This SACo-N/C exhibits excellent performances for both ORR (half-wave potential of 0.878 V) and HER (overpotential at 10 mA/cm2 of 178 mV), and is thus a potential replacement for Pt-based catalysts. When SACo-N/C is integrated into a Zn-O2 battery, battery with high open-circuit voltage (1.536 V) has high peak power density (266 mW/cm2) and large gravimetric energy density (755 mA h/gZn) at current densities of 100 mA/cm2. Thus, we believe that this strategy may offer a new direction for the effective generation of SAM-N/C catalysts.
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Affiliation(s)
- Yao Wang
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering. Chongqing University, Chongqing 400044, China; Institute of New-Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, China
| | - Linhui Chen
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering. Chongqing University, Chongqing 400044, China
| | - Zhanxin Mao
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering. Chongqing University, Chongqing 400044, China
| | - Lishan Peng
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering. Chongqing University, Chongqing 400044, China
| | - Rui Xiang
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering. Chongqing University, Chongqing 400044, China
| | - Xianyi Tang
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering. Chongqing University, Chongqing 400044, China
| | - Jianghai Deng
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering. Chongqing University, Chongqing 400044, China
| | - Zidong Wei
- Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, College of Chemistry and Chemical Engineering. Chongqing University, Chongqing 400044, China.
| | - Qiang Liao
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China
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50
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Zhao J, Li Q, Han L, Liu R. Spherical mesocrystals from self-assembly of folic acid and nickel(II) ion for high-performance supercapacitors. J Colloid Interface Sci 2019; 538:142-148. [DOI: 10.1016/j.jcis.2018.11.088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/21/2018] [Accepted: 11/22/2018] [Indexed: 11/15/2022]
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