1
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Yanagiyama K, Takimoto K, Dinh Le S, Nu Thanh Ton N, Taniike T. High-throughput experimentation for photocatalytic water purification in practical environments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 342:122974. [PMID: 37981181 DOI: 10.1016/j.envpol.2023.122974] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 10/26/2023] [Accepted: 11/14/2023] [Indexed: 11/21/2023]
Abstract
High-throughput screening instrument was developed for photocatalytic water purification, enabling the simultaneous testing of 132 photocatalytic reactions under uniform visible light irradiation, temperature control, and stirring. The instrument was used to investigate the effects of different catalysts (TiO2, ZnO, α-Fe2O3) and environmental waters (seawater, urban wastewater, and industrial wastewater) on dye degradation. It was observed environmental ions, particularly carbonate and phosphate ions, significantly reduced catalyst activity by inhibiting the adsorption of dye molecules. To develop effective catalysts for dye degradation in industrial wastewater, 15 types of noble metal nanoparticles (NPs) were supported on photocatalysts. The study found that noble metal NPs with high work functions and oxidation resistance, such as Au and Pt, exhibited higher activity even in the industrial wastewater, likely converting environmental ions into active species. These findings, based on 432 test results, demonstrate the effectiveness of the developed high-throughput screening instrument for optimizing photocatalytic water purification.
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Affiliation(s)
- Kyo Yanagiyama
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Ken Takimoto
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Son Dinh Le
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Nhan Nu Thanh Ton
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Toshiaki Taniike
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan.
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2
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Alonso-Vante N. Parameters Affecting the Fuel Cell Reactions on Platinum Bimetallic Nanostructures. ELECTROCHEM ENERGY R 2023. [DOI: 10.1007/s41918-022-00145-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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3
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Gao Y, Thakur N, Uchiyama T, Cao W, Yamamoto K, Watanabe T, Kumar M, Sato R, Teranishi T, Imai H, Sakurai Y, Uchimoto Y. Investigating Degradation Mechanisms in PtCo Alloy Catalysts: The Role of Co Content and a Pt-Rich Shell Using Operando High-Energy Resolution Fluorescence Detection X-ray Absorption Spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37908070 DOI: 10.1021/acsami.3c11248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Low Pt-based alloy catalysts are regarded as an efficient strategy in achieving high activity for the oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells (PEMFCs). However, the desired durability for the low Pt-based catalysts, such as the Pt1Co3 catalyst, has still been considered a great challenge for PEMFCs. In this study, we investigate sub-2.5 nm PtxCoy alloy catalysts with varying Co content and Pt1Co3@Pt core-shell (CS) nanostructure catalysts obtained through a simple displacement reaction. The Pt1Co3@Pt_H catalysts showed a high mass activity (MA) of 1.46 A/mgPt at 0.9 V and 14% MA loss after 10k accelerated degradation test (ADT) cycles, which suggested the improved stability compared with Pt1Co3 catalysts (52% MA loss). To clarify the degradation mechanism, operando high-energy resolution fluorescence detection X-ray absorption spectroscopy (XAS) was applied in addition to conventional advanced measurement techniques, including operando conventional XAS, to analyze the electronic state and structure changes during operation potentials. We found that introducing Co improves the catalysts' activity mainly from the strain effect, but an excessive amount of Co leads to increased Pt-oxidation, which accelerates the degradation of the catalysts. The Pt1Co3@Pt_H catalyst shows high tolerance to Pt-oxidation, benefiting both the stability and activity. Our findings demonstrate an in-depth understanding of the degradation mechanism and the importance of designing PtCo CS nanostructures with optimal Co content for enhanced performance in PEMFCs.
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Affiliation(s)
- Yunfei Gao
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Neha Thakur
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Tomoki Uchiyama
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Weijie Cao
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kentaro Yamamoto
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Toshiki Watanabe
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Mukesh Kumar
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ryota Sato
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Toshiharu Teranishi
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Hideto Imai
- Fuel Cell Cutting-Edge Research Center Technology Research Association, Aomi, Koto, Tokyo 135-0064, Japan
| | - Yoshiharu Sakurai
- Japan Synchrotron Radiation Research Institute (JASRI), Koto, Sayo, Hyogo 679-5198, Japan
| | - Yoshiharu Uchimoto
- Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan
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4
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Seselj N, Alfaro SM, Bompolaki E, Cleemann LN, Torres T, Azizi K. Catalyst Development for High-Temperature Polymer Electrolyte Membrane Fuel Cell (HT-PEMFC) Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302207. [PMID: 37151102 DOI: 10.1002/adma.202302207] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/03/2023] [Indexed: 05/09/2023]
Abstract
A constant increase in global emission standard is causing fuel cell (FC) technology to gain importance. Over the last two decades, a great deal of research has been focused on developing more active catalysts to boost the performance of high-temperature polymer electrolyte membrane fuel cells (HT-PEMFC), as well as their durability. Due to material degradation at high-temperature conditions, catalyst design becomes challenging. Two main approaches are suggested: (i) alloying platinum (Pt) with low-cost transition metals to reduce Pt usage, and (ii) developing novel catalyst support that anchor metal particles more efficiently while inhibiting corrosion phenomena. In this comprehensive review, the most recent platinum group metal (PGM) and platinum group metal free (PGM-free) catalyst development is detailed, as well as the development of alternative carbon (C) supports for HT-PEMFCs.
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Affiliation(s)
- Nedjeljko Seselj
- Blue World Technologies, Egeskovvej 6C, Kvistgaard, 3490, Denmark
| | - Silvia M Alfaro
- Blue World Technologies, Egeskovvej 6C, Kvistgaard, 3490, Denmark
| | | | - Lars N Cleemann
- Blue World Technologies, Egeskovvej 6C, Kvistgaard, 3490, Denmark
| | - Tomas Torres
- Department of Organic Chemistry, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), Campus de Cantoblanco, Madrid, 28049, Spain
- IMDEA-Nanociencia, c/Faraday, 9, Ciudad Universitaria de Cantoblanco, Madrid, 28049, Spain
| | - Kobra Azizi
- Blue World Technologies, Egeskovvej 6C, Kvistgaard, 3490, Denmark
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5
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Zhang HJ, Zhou Z, He Y, Chen B, Yao W, Xue Y. How does metal affect N-doped carbon catalyst for oxygen reduction reaction? J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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6
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Song M, Zhang B, Zhai Z, Liu S, Wang L, Liu G. Highly Dispersed Pt Stabilized by ZnO x-Si on Self-Pillared Zeolite Nanosheets for Propane Dehydrogenation. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c04041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Affiliation(s)
- Mingxia Song
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Bofeng Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Ziwei Zhai
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Sibao Liu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Li Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Guozhu Liu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
- Zhejiang Institute of Tianjin University, Ningbo, Zhejiang 315201, China
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7
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Wang W, Li X, Cheng Y, Zhang M, Zhao K, Liu Y. An effective PtPdAuCuFe/C high-entropy-alloy applied to direct ethylene glycol fuel cells. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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8
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Advances in Low Pt Loading Membrane Electrode Assembly for Proton Exchange Membrane Fuel Cells. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020773. [PMID: 36677836 PMCID: PMC9866934 DOI: 10.3390/molecules28020773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/03/2023] [Accepted: 01/06/2023] [Indexed: 01/15/2023]
Abstract
Hydrogen has the potential to be one of the solutions that can address environmental pollution and greenhouse emissions from traditional fossil fuels. However, high costs hinder its large-scale commercialization, particularly for enabling devices such as proton exchange membrane fuel cells (PEMFCs). The precious metal Pt is indispensable in boosting the oxygen reduction reaction (ORR) in cathode electrocatalysts from the most crucial component, i.e., the membrane electrode assembly (MEA). MEAs account for a considerable amount of the entire cost of PEMFCs. To address these bottlenecks, researchers either increase Pt utilization efficiency or produce MEAs with enhanced performance but less Pt. Only a few reviews that explain the approaches are available. This review summarizes advances in designing nanocatalysts and optimizing the catalyst layer structure to achieve low-Pt loading MEAs. Different strategies and their corresponding effectiveness, e.g., performance in half-cells or MEA, are summarized and compared. Finally, future directions are discussed and proposed, aiming at affordable, highly active, and durable PEMFCs.
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9
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Chen H, Liu J, Wu X, Ye C, Zhang J, Luo JL, Fu XZ. Pt-Co Electrocatalysts: Syntheses, Morphologies, and Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204100. [PMID: 35996763 DOI: 10.1002/smll.202204100] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/29/2022] [Indexed: 06/15/2023]
Abstract
Pt-Co electrocatalysts have attracted significant attention because of their excellent performance in many electrochemical reactions. This review focuses on Pt-Co electrocatalysts designed and prepared for electrocatalytic applications. First, the various synthetic methods and synthesis mechanisms are systematically summarized; typical examples and core synthesis parameters are discussed for regulating the morphology and structure. Then, starting with the design and structure-activity relationship of catalysts, the research progress of the morphologies and structures of Pt-Co electrocatalysts obtained based on various strategies, the structure-activity relationship between them, and their properties are summarized. In addition, the important electrocatalytic applications and mechanisms of Pt-Co catalysts, including electrocatalytic oxidation/reduction and bifunctional catalytic reactions, are described and summarized, and their high catalytic activities are discussed on the basis of their mechanism and active sites. Moreover, the advanced electrochemical in situ characterization techniques are summarized, and the challenges and direction concerning the development of high-performance Pt-Co catalysts in electrocatalysis are discussed.
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Affiliation(s)
- Hao Chen
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Jianwen Liu
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Xuexian Wu
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Chunyi Ye
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Jiujun Zhang
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
- Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai, 200444, P. R. China
| | - Jing-Li Luo
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Xian-Zhu Fu
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
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10
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Electrified Hydrogen Production from Methane for PEM Fuel Cells Feeding: A Review. ENERGIES 2022. [DOI: 10.3390/en15103588] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The greatest challenge of our times is to identify low cost and environmentally friendly alternative energy sources to fossil fuels. From this point of view, the decarbonization of industrial chemical processes is fundamental and the use of hydrogen as an energy vector, usable by fuel cells, is strategic. It is possible to tackle the decarbonization of industrial chemical processes with the electrification of systems. The purpose of this review is to provide an overview of the latest research on the electrification of endothermic industrial chemical processes aimed at the production of H2 from methane and its use for energy production through proton exchange membrane fuel cells (PEMFC). In particular, two main electrification methods are examined, microwave heating (MW) and resistive heating (Joule), aimed at transferring heat directly on the surface of the catalyst. For cases, the catalyst formulation and reactor configuration were analyzed and compared. The key aspects of the use of H2 through PEM were also analyzed, highlighting the most used catalysts and their performance. With the information contained in this review, we want to give scientists and researchers the opportunity to compare, both in terms of reactor and energy efficiency, the different solutions proposed for the electrification of chemical processes available in the recent literature. In particular, through this review it is possible to identify the solutions that allow a possible scale-up of the electrified chemical process, imagining a distributed production of hydrogen and its consequent use with PEMs. As for PEMs, in the review it is possible to find interesting alternative solutions to platinum with the PGM (Platinum Group Metal) free-based catalysts, proposing the use of Fe or Co for PEM application.
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11
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Weber P, Weber DJ, Dosche C, Oezaslan M. Highly Durable Pt-Based Core–Shell Catalysts with Metallic and Oxidized Co Species for Boosting the Oxygen Reduction Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00514] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Philipp Weber
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
- Technical Electrocatalysis Laboratory, Institute of Technical Chemistry, Technical University of Braunschweig, Braunschweig 38106, Germany
| | - Daniel J. Weber
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
- Technical Electrocatalysis Laboratory, Institute of Technical Chemistry, Technical University of Braunschweig, Braunschweig 38106, Germany
| | - Carsten Dosche
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
| | - Mehtap Oezaslan
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
- Technical Electrocatalysis Laboratory, Institute of Technical Chemistry, Technical University of Braunschweig, Braunschweig 38106, Germany
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12
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PtCo-Based nanocatalyst for oxygen reduction reaction: Recent highlights on synthesis strategy and catalytic mechanism. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.03.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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13
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Zhang H, Liu J, Li X, Duan X, Yuan M, Cao F, Sun K, Zhang Y, Wang Y, Gu Z, Li J, Liu J. A TiN@C core–shell support for improving Pt catalyst corrosion resistance. RSC Adv 2022; 12:25035-25040. [PMID: 36199880 PMCID: PMC9438899 DOI: 10.1039/d2ra02569h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 05/11/2022] [Indexed: 11/21/2022] Open
Abstract
TiN@C composite support with high corrosion resistance improves catalyst durability because of SMSI between the Pt and N site in TiN.
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Affiliation(s)
- Hongyu Zhang
- Institute of Energy Power Innovation, North China Electric Power University Beijing, Changping 102206, China
- College of Engineering and Applied Sciences, Nanjing University, 22 Hankou Road, Nanjing 210093, China
| | - Jia Liu
- College of Engineering and Applied Sciences, Nanjing University, 22 Hankou Road, Nanjing 210093, China
| | - Xiaolin Li
- China Automotive Innovation Corporation, 88 Shengli Road, Nanjing 211106, China
| | - Xiao Duan
- College of Engineering and Applied Sciences, Nanjing University, 22 Hankou Road, Nanjing 210093, China
| | - Mengchen Yuan
- College of Engineering and Applied Sciences, Nanjing University, 22 Hankou Road, Nanjing 210093, China
| | - Feng Cao
- College of Engineering and Applied Sciences, Nanjing University, 22 Hankou Road, Nanjing 210093, China
| | - Kui Sun
- China Automotive Innovation Corporation, 88 Shengli Road, Nanjing 211106, China
| | - Yunbo Zhang
- China Automotive Innovation Corporation, 88 Shengli Road, Nanjing 211106, China
| | - Ying Wang
- China Automotive Innovation Corporation, 88 Shengli Road, Nanjing 211106, China
| | - Zhengbin Gu
- College of Engineering and Applied Sciences, Nanjing University, 22 Hankou Road, Nanjing 210093, China
| | - Jia Li
- Institute of Energy Power Innovation, North China Electric Power University Beijing, Changping 102206, China
| | - Jianguo Liu
- Institute of Energy Power Innovation, North China Electric Power University Beijing, Changping 102206, China
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14
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Lin R, Zheng T, Chen L, Wang H, Cai X, Sun Y, Hao Z. Anchored Pt-Co Nanoparticles on Honeycombed Graphene as Highly Durable Catalysts for the Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2021; 13:34397-34409. [PMID: 34255470 DOI: 10.1021/acsami.1c08810] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Durability is an important factor in evaluating the performance of a catalyst. In this work, the spatial protection of the carrier to nanoparticles was considered to improve the durability of the catalyst. It is found that a honeycombed graphene with a three-dimensional (3D)-hierarchical porous structure (3D HPG) can help to reduce the shedding of Pt-Co nanoparticles (Pt-Co NPs) because 3D HPG can form a protective layer to reduce the direct erosion of Pt-Co NPs on the interface by an electrolyte. Then, appropriate oxygen groups were introduced on the 3D reduced hierarchical porous graphene oxide (3D rHPGO) to improve the dispersion of Pt-Co NPs on the surface of the carrier. It was found that the Pt d-band of the catalyst was anchored by π sites of carbonyl of an oxygen group. After optimization, the catalyst (referred to as Pt-Co/3D rHPGO) achieved a 2-fold enhancement in mass activity than that of a commercial Pt/C catalyst. More importantly, after the accelerated durability test (ADT) of 20 000 cycles, the Pt-Co/3D rHPGO catalyst can almost sustain this level of performance, whereas other catalysts showed a comparatively large loss of activity. According to the results, the high durability of Pt-Co/3D rHPGO was attributed to spatial protection of Pt-Co NPs and the defects on the surface allowed the electrolyte to enter. In addition, oxygen groups provided an anchoring effect on nanoparticles. Thus, the Pt-Co/3D rHPGO electrocatalyst exhibited splendid durability, holding a potential to be applied in PEMFC for long-term work.
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Affiliation(s)
- Rui Lin
- School of Automotive Studies, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Tong Zheng
- School of Automotive Studies, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Liang Chen
- School of Automotive Studies, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Hong Wang
- School of Automotive Studies, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Xin Cai
- School of Automotive Studies, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Ying Sun
- School of Automotive Studies, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Zhixian Hao
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China
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15
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Peng K, Zhang W, Bhuvanendran N, Ma Q, Xu Q, Xing L, Khotseng L, Su H. Pt-based (Zn, Cu) nanodendrites with enhanced catalytic efficiency and durability toward methanol electro-oxidation via trace Ir-doping engineering. J Colloid Interface Sci 2021; 598:126-135. [PMID: 33895534 DOI: 10.1016/j.jcis.2021.04.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 04/01/2021] [Accepted: 04/05/2021] [Indexed: 11/29/2022]
Abstract
Pt-based alloy nanomaterials with nanodendrites (NDs) structures are efficient electrocatalysts for methanol oxidation reaction (MOR), however their durability is greatly limited by the issue of transition metals dissolution. In this work, a facile trace Ir-doping strategy was proposed to fabricate Ir-PtZn and Ir-PtCu alloy NDs catalysts in aqueous medium, which significantly improved the electrocatalytic activity and durability for MOR. The as-prepared Ir-PtZn/Cu NDs catalysts showed distinct dendrites structures with the averaged diameter of 4.1 nm, and trace Ir doping subsequently improved the utilization of Pt atoms and promoted the oxidation efficiency of methanol. The electrochemical characterizations further demonstrated that the obtained Ir-PtZn/Cu NDs possessed enhanced mass activities of nearly 1.23 and 1.28-fold higher than those of undoped PtZn and PtCu, and approximately 2.35 and 2.67-fold higher than that of Pt/C in acid medium. More excitingly, after long-term durability test, the proposed Ir-PtZn and Ir-PtCu NDs still retained about 88.9% and 91.6% of its initial mass activities, which further highlights the key role of Ir-doping in determining catalyst performance. This work suggests that trace Ir-doping engineering could be a promising way to develop advanced electrocatalysts toward MOR for direct methanol fuel cell (DMFC) applications.
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Affiliation(s)
- Kai Peng
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Weiqi Zhang
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | | | - Qiang Ma
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Qian Xu
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Lei Xing
- Institute of Green Chemistry and Chemical Technology, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Lindiwe Khotseng
- Department of Chemistry, University of the Western Cape, Robert Sobukwe Road, Cape Town 7535, South Africa
| | - Huaneng Su
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
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