1
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Bai J, Lin Y, Xu J, Zhou W, Zhou P, Deng Y, Lian Y. PGM-free single atom catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells. Chem Commun (Camb) 2024; 60:7113-7123. [PMID: 38912537 DOI: 10.1039/d4cc02106a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
The progress of proton exchange membrane fuel cells (PEMFCs) in the clean energy sector is notable for its efficiency and eco-friendliness, although challenges remain in terms of durability, cost and power density. The oxygen reduction reaction (ORR) is a key sluggish process and although current platinum-based catalysts are effective, their high cost and instability is a significant barrier. Single-atom catalysts (SACs) offer an economically viable alternative with comparable catalytic activity for ORR. The primary concern regarding SACs is their operational stability under PEMFCs conditions. In this article, we review current strategies for increasing the catalytic activity of SACs, including increasing active site density, optimizing metal center coordination through heteroatom doping, and engineering porous substrates. To enhance durability, we discuss methods to stabilize metal centers, mitigate the effects of the Fenton reaction, and improve graphitization of the carbon matrix. Future research should apply computational chemistry to predict catalyst properties, develop in situ characterization for real-time active site analysis, explore novel catalysts without the use of platinum-based catalysts to reduce dependence on rare and noble metal, and investigate the long-term stability of catalyst under operating conditions. The aim is to engineer SACs that meet and surpass the performance benchmarks of PEMFCs, contributing to a sustainable energy future.
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Affiliation(s)
- Jirong Bai
- Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, 213022, China.
| | - Yao Lin
- Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, 213022, China.
| | - Jinnan Xu
- Department of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213022, China
| | - Wangkai Zhou
- Department of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213022, China
| | - Pin Zhou
- Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, 213022, China.
- Department of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213022, China
| | - Yaoyao Deng
- Research Center of Secondary Resources and Environment, School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, 213022, China.
| | - Yuebin Lian
- School of Optoelectronics, Changzhou Institute of Technology, Changzhou, 213022, China.
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2
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Wang C, Xue S, Xu Y, Li R, Qiu Y, Wang C, Ren LF, Shao J. Novel electrocatalytic capacitive deionization with catalytic electrodes for selective phosphonate degradation: Performance and mechanism. WATER RESEARCH 2024; 256:121614. [PMID: 38657308 DOI: 10.1016/j.watres.2024.121614] [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: 02/04/2024] [Revised: 04/07/2024] [Accepted: 04/14/2024] [Indexed: 04/26/2024]
Abstract
Phosphonate is becoming a global interest and concern owing to its environment risk and potential value. Degradation of phosphonate into phosphate followed by the recovery is regarded as a promising strategy to control phosphonate pollution, relieve phosphorus crisis, and promote phosphorus cycle. Given these objectives, an anion-membrane-coated-electrode (A-MCE) doped with Fe-Co based carbon catalyst and cation-membrane-coated-electrode (C-MCE) doped with carbon-based catalyst were prepared as catalytic electrodes, and a novel electrocatalytic capacitive deionization (E-CDI) was developed. During charging process, phosphonate was enriched around A-MCE surface based on electrostatic attraction, ligand exchange, and hydrogen bond. Meanwhile, Fe2+ and Co2+ were self-oxidized into Fe3+ and Co3+, forming a complex with enriched phosphonate and enabling an intramolecular electron transfer process for phosphonate degradation. Additionally, benefiting from the stable dissolved oxygen and high oxygen reduction reaction activity of C-MCE, hydrogen peroxide accumulated in E-CDI (158 μM) and thus hydroxyl radicals (·OH) were generated by activation. E-CDI provided an ideal platform for the effective reaction between ·OH and phosphonate, avoiding the loss of ·OH and triggering selective degradation of most phosphonate. After charging for 70 min, approximately 89.9% of phosphonate was degraded into phosphate, and phosphate was subsequently adsorbed by A-MCE. Results also showed that phosphonate degradation was highly dependent on solution pH and voltage, and was insignificantly affected by electrolyte concentration. Compared to traditional advanced oxidation processes, E-CDI exhibited a higher degradation efficiency, lower cost, and less sensitive to co-existed ions in treating simulated wastewaters. Self-enhanced and selective degradation of phosphonate, and in-situ phosphate adsorption were simultaneously achieved for the first time by a E-CDI system, showing high promise in treating organic-containing saline wastewaters.
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Affiliation(s)
- Chengyi Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, 200240, Shanghai, PR China; China Electronics System Engineering NO. 2 Construction Co., Ltd., No. 88 Juqu Road, Wuxi, 214135, Jiangsu, PR China
| | - Siyue Xue
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, 200240, Shanghai, PR China
| | - Yubo Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, 200240, Shanghai, PR China
| | - Ran Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, 200240, Shanghai, PR China
| | - Yangbo Qiu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, 200240, Shanghai, PR China
| | - Chao Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, 200240, Shanghai, PR China
| | - Long-Fei Ren
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, 200240, Shanghai, PR China.
| | - Jiahui Shao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, 200240, Shanghai, PR China; Institute for Ecological Research and Pollution Control of Plateau Lakes, Yunnan University, No. 2 Cuihu North Road, Kunming, 650504, Yunnan, PR China.
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3
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Hua R, Bao Z, Peng Y, Lei H, Liang Z, Zhang W, Cao R, Zheng H. A twisted carbonaceous nanotube as the air-electrode for flexible Zn-Air batteries. Chem Commun (Camb) 2024; 60:1476-1479. [PMID: 38224165 DOI: 10.1039/d3cc06143d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Exploring electrocatalysts with high-efficiency oxygen reduction reaction (ORR) is significant for practical applications of fuel cells and metal-air batteries. In this work, a twisted core@shell material has been prepared with helical polypyrrole nanotubes (HPPys) as the core and coordination polymers (CPs) as the shell. After the pyrolysis process, a dense twisted carbon layer was formed by the reaction of CP and HPPy at its interface under Ar. The derived twisted carbonaceous nanotube exhibits good performance in both electrocatalytic ORR and OER. When used as the air-electrode in a flexible Zn-air battery, the battery shows good performance and stability.
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Affiliation(s)
- Rong Hua
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Zijia Bao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Yuxin Peng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Haitao Lei
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Zuozhong Liang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Haoquan Zheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
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4
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Wu HR, Chen MY, Li WD, Lu BA. Recent Progress on Durable Metal-N-C Catalysts for Proton Exchange Membrane Fuel Cells. Chem Asian J 2024; 19:e202300862. [PMID: 37966013 DOI: 10.1002/asia.202300862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 11/16/2023]
Abstract
It is essential for the widespread application of proton exchange membrane fuel cells (PEMFCs) to investigate low-cost, extremely active, and long-lasting oxygen reduction catalysts. Initial performance of PGM-free metal-nitrogen-carbon (M-N-C) catalysts for oxygen reduction reaction (ORR) has advanced significantly, particularly for Fe-N-C-based catalysts. However, the insufficient stability of M-N-C catalysts still impedes their use in practical fuel cells. In this review, we focus on the understanding of the structure-stability relationship of M-N-C ORR catalysts and summarize valuable guidance for the rational design of durable M-N-C catalysts. In the first section of this review, we discuss the inherent degrading mechanisms of M-N-C catalysts, such as carbon corrosion, demetallation, H2 O2 attack, etc. As we gain a thorough comprehension of these deterioration mechanisms, we shift our attention to the investigation of strategies that can mitigate catalyst deterioration and increase its stability. These strategies include enhancing the anti-oxidation of carbon, fortifying M-N bonds, and maximizing the effectiveness of free radical scavengers. This review offers a prospective view on the enhancement of the stability of non-noble metal catalysts.
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Affiliation(s)
- Hao-Ran Wu
- College of Materials Science and Engineering, Zhengzhou University, 450001, Zhengzhou, P. R. China
| | - Miao-Ying Chen
- College of Materials Science and Engineering, Zhengzhou University, 450001, Zhengzhou, P. R. China
| | - Wei-Dong Li
- College of Materials Science and Engineering, Zhengzhou University, 450001, Zhengzhou, P. R. China
| | - Bang-An Lu
- College of Materials Science and Engineering, Zhengzhou University, 450001, Zhengzhou, P. R. China
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5
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Wang L, Xu M, Li H, Huang Z, Wang L, Taylor Isimjan T, Yang X. Mn-Doped Zn Metal-Organic Framework-Derived Porous N-Doped Carbon Composite as a High-Performance Nonprecious Electrocatalyst for Oxygen Reduction and Aqueous/Flexible Zinc-Air Batteries. Inorg Chem 2023; 62:13284-13292. [PMID: 37542458 DOI: 10.1021/acs.inorgchem.3c01536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2023]
Abstract
Developing low-cost, efficient, and stable oxygen reduction reaction (ORR) electrocatalysts is crucial for the commercialization of energy conversion devices such as metal-air batteries. In this study, we report a Mn-doped Zn metal-organic framework-derived porous N-doped carbon composite (30-ZnMn-NC) as a high-performance ORR catalyst. 30-ZnMn-NC exhibits excellent electrocatalytic activity, demonstrating a kinetic current density of 9.58 mA cm-2 (0.8 V) and a half-wave potential of 0.83 V, surpassing the benchmark Pt/C and most of the recently reported non-noble metal-based catalysts. Moreover, the assembled zinc-air battery with 30-ZnMn-NC demonstrates high peak power densities of 207 and 66.3 mW cm-2 in liquid and flexible batteries, respectively, highlighting its potential for practical applications. The excellent electrocatalytic activity of 30-ZnMn-NC is attributed to its unique porous structure, the strong electronic interaction between metal Zn/Mn and adjacent N-doped carbon, as well as the bimetallic Mn/Zn-N active sites, which synergistically promote faster reaction kinetics. This work offers a controllable design strategy for efficient electrocatalysts with porous structures and bimetallic active sites, which can significantly enhance the performance of energy conversion devices.
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Affiliation(s)
- Lixia Wang
- Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Meijiao Xu
- Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Huatong Li
- Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Zhiyang Huang
- Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Lei Wang
- Department of Food and Environmental Engineering, Chuzhou Polytechnic, Chuzhou 239000, China
| | - Tayirjan Taylor Isimjan
- Saudi Arabia Basic Industries Corporation (SABIC) at King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Xiulin Yang
- Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
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6
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Gong L, Zhu J, Xia F, Zhang Y, Shi W, Chen L, Yu J, Wu J, Mu S. Marriage of Ultralow Platinum and Single-Atom MnN 4 Moiety for Augmented ORR and HER Catalysis. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Affiliation(s)
- Lei Gong
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, China
| | - Jiawei Zhu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Fanjie Xia
- NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan 430070, China
| | - Yuhan Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Wenjie Shi
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Lei Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Jun Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Jinsong Wu
- NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan 430070, China
| | - Shichun Mu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, China
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7
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Đukić T, Pavko L, Jovanovič P, Maselj N, Gatalo M, Hodnik N. Stability challenges of carbon-supported Pt-nanoalloys as fuel cell oxygen reduction reaction electrocatalysts. Chem Commun (Camb) 2022; 58:13832-13854. [PMID: 36472187 PMCID: PMC9753161 DOI: 10.1039/d2cc05377b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 11/21/2022] [Indexed: 11/14/2023]
Abstract
Carbon-supported Pt-based nanoalloys (CSPtNs) as the oxygen reduction reaction (ORR) electrocatalysts are considered state-of-the-art electrocatalysts for use in proton exchange membrane fuel cells (PEMFCs). Although their ORR activity performance is already adequate to allow lowering of the Pt loading and thus commercialisation of the fuel cell technology, their stability remains an open challenge. In this Feature Article, the recent achievements and acquired knowledge on the degradation behaviour of these electrocatalysts are overviewed and discussed.
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Affiliation(s)
- Tina Đukić
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia.
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Luka Pavko
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia.
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Primož Jovanovič
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia.
| | - Nik Maselj
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia.
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Matija Gatalo
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia.
- ReCatalyst d.o.o., Hajdrihova ulica 19, 1001 Ljubljana, Slovenia
| | - Nejc Hodnik
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia.
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8
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Chen F, Huang GY, Wang KA, Zhu HB. Metal–Organic-Framework-Derived Atomically Dispersed Mn–N–C Electrocatalysts Boosting Oxygen Reduction Modulated by Anion Exchange of Permanganate. Inorg Chem 2022; 61:18759-18768. [DOI: 10.1021/acs.inorgchem.2c03295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Feng Chen
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Gao-Yuan Huang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Ke-An Wang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Hai-Bin Zhu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
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9
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Zhou ZH, Li WH, Zhang Z, Huang QS, Zhao XC, Cao W. Ni-O 4 as Active Sites for Efficient Oxygen Evolution Reaction with Electronic Metal-Support Interactions. ACS APPLIED MATERIALS & INTERFACES 2022; 14:47542-47548. [PMID: 36228176 DOI: 10.1021/acsami.2c11201] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Precise adjustment of the metal site structure in single-atom catalysts (SACs) plays a key role in addressing the oxygen evolution reaction (OER). Herein, we report the synthesis of O-doped Ni SACs anchored on porous graphene-like carbon (Ni-O-G) using molten salts (ZnCl2 and NaCl) as templates, in which the unique Ni-O4 structure serves as the active sites. Ni-O-G, with an overpotential of only 238 mV (@ 10 mA cm-2), is one of the more advanced catalysts. An array of characterizations and density functional theory calculations show that the Ni-O4 coordination enables Ni to be closer to the Fermi level compared to traditional Ni-N4, enhancing the electronic metal-support interaction to facilitate OER kinetics. Thus, this work offers an alternative strategy for the structural modulation of Ni SACs and the effect of different coordination elements with the same atomic coordination structure on the intrinsic OER activity.
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Affiliation(s)
- Zhang-Hong Zhou
- School of Chemical Engineering, Sichuan University, Chengdu610065, P.R. China
- Institute of Materials, China Academy of Engineering Physics, Jiangyou621908, China
| | - Wei-Hang Li
- Institute of Materials, China Academy of Engineering Physics, Jiangyou621908, China
| | - Zhen Zhang
- Institute of Materials, China Academy of Engineering Physics, Jiangyou621908, China
| | - Qing-Song Huang
- School of Chemical Engineering, Sichuan University, Chengdu610065, P.R. China
| | - Xiao-Chong Zhao
- Institute of Materials, China Academy of Engineering Physics, Jiangyou621908, China
| | - Wei Cao
- Institute of Materials, China Academy of Engineering Physics, Jiangyou621908, China
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10
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Zhang W, Liang Z, Tian W, Liu Y, Du Y, Chen M, Cao D. 3D porous carbon conductive network with highly dispersed Fe-N xsites catalysts for oxygen reduction reaction. NANOTECHNOLOGY 2022; 33:455701. [PMID: 35896089 DOI: 10.1088/1361-6528/ac8487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
Intrinsic activity and reactive numbers are considered two important factors in oxygen reduction reaction (ORR) catalysts. Herein, we report the rational design and synthesis of a strongly coupled hybrid material comprising of FeZn nanoparticles (FeZn NPs) supported by a three-dimensional carbon conductive network (FeZn NPs@3D-CN) for increased ORR performance. Fe-N-C sites can offer high intrinsic activity owing to the unique bonding and oxygen vacancies, and the carbon conductive network facilitating the exposure to active sites, and increasing electron transport. Because of the synergetic effect of the conductive networks containing Fe-N-C and polyaniline, the catalysts exhibited ORR activity in an alkaline medium via a four-electron transfer process. FeZn NPs@3D-CN exhibited outstanding performance with a limited current density (6.2 mA cm-2), the Tafel slope (81.19 mV dec-1), and stability (23 mV negative shift after 2000 cycles), which were superior to those of 20% Pt/C (5.7 mA cm-2, 75.1 mV dec-1, 36 mV negative shift after 2000 cycles). This research highlights the effect of conductive networks expanding pathways and reducing the resistance of mass transport, which is a facile method to generate superior ORR electrocatalysts.
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Affiliation(s)
- Wenxin Zhang
- School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
| | - Zhiwei Liang
- School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
| | - Wensheng Tian
- School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
| | - Yuan Liu
- School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
| | - Yuanzhen Du
- School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
| | - Mingming Chen
- School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
| | - Dawei Cao
- School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
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11
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Zhang PY, Yang XH, Jiang QR, Cui PX, Zhou ZY, Sun SH, Wang YC, Sun SG. General Carbon-Supporting Strategy to Boost the Oxygen Reduction Activity of Zeolitic-Imidazolate-Framework-Derived Fe/N/Carbon Catalysts in Proton Exchange Membrane Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2022; 14:30724-30734. [PMID: 35766357 DOI: 10.1021/acsami.2c04786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The oxygen reduction reaction (ORR) activity of the Fe/N/Carbon catalysts derived from the pyrolysis of zeolitic-imidazolate-framework-8 (ZIF-8) has been still lower than that of commercial Pt-based catalysts utilized in the proton exchange membrane fuel cells (PEMFCs) due to low density of accessible active sites. In this study, an efficient carbon-supporting strategy is developed to enhance the ORR efficiency of the ZIF-derived Fe/N/Carbon catalysts by increasing the accessible active site density. The enhancement lies in (i) improving the accessibility of active sites via converting dodecahedral particles to graphene-like layered materials and (ii) enhancing the density of FeNx active sites via suppressing the formation of nanoparticles as well as providing extra spaces to host active sites. The optimized and efficient Fe/N/Carbon catalyst shows a half-wave potential (E1/2) of 0.834 V versus reversible hydrogen electrode in acidic media and produces a peak power density of 0.66 W cm-2 in an air-fed PEMFC at 2 bar backpressure, outperforming most previously reported Pt-free ORR catalysts. Finally, the general applicability of the carbon-supporting strategy is confirmed using five different commercial carbon blacks. This work provides an effective route to derive Fe/N/Carbon catalysts exhibiting a higher power density in PEMFCs.
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Affiliation(s)
- Peng-Yang Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xiao-Hua Yang
- Institut National de la Recherche Scientifique (INRS)-Center Énergie Matériaux et Télécommunications, Varennes, Quebec J3X 1P7, Canada
- Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Qiao-Rong Jiang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Pei-Xin Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhi-You Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shu-Hui Sun
- Institut National de la Recherche Scientifique (INRS)-Center Énergie Matériaux et Télécommunications, Varennes, Quebec J3X 1P7, Canada
| | - Yu-Cheng Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shi-Gang Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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12
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Chen G, Zhong H, Feng X. Active site engineering of single-atom carbonaceous electrocatalysts for the oxygen reduction reaction. Chem Sci 2021; 12:15802-15820. [PMID: 35024105 PMCID: PMC8672718 DOI: 10.1039/d1sc05867c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 11/10/2021] [Indexed: 12/03/2022] Open
Abstract
The electrocatalytic oxygen reduction reaction (ORR) is the vital process at the cathode of next-generation electrochemical storage and conversion technologies, such as metal-air batteries and fuel cells. Single-metal-atom and nitrogen co-doped carbonaceous electrocatalysts (M-N-C) have emerged as attractive alternatives to noble-metal platinum for catalyzing the kinetically sluggish ORR due to their high electrical conductivity, large surface area, and structural tunability at the atomic level, however, their application is limited by the low intrinsic activity of the metal-nitrogen coordination sites (M-N x ) and inferior site density. In this Perspective, we summarize the recent progress and milestones relating to the active site engineering of single atom carbonous electrocatalysts for enhancing the ORR activity. Particular emphasis is placed on the emerging strategies for regulating the electronic structure of the single metal site and populating the site density. In addition, challenges and perspectives are provided regarding the future development of single atom carbonous electrocatalysts for the ORR and their utilization in practical use.
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Affiliation(s)
- Guangbo Chen
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden Mommsenstr. 4 01062 Dresden Germany
| | - Haixia Zhong
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden Mommsenstr. 4 01062 Dresden Germany
| | - Xinliang Feng
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden Mommsenstr. 4 01062 Dresden Germany
- Department of Synthetic Materials and Functional Devices, Max Planck Institute of Microstructure Physics Weinberg 2 Halle (Saale) D-06120 Germany
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