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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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2
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Yang Q, Zhang C, Yi F, Li X, Yuan Y, Liu K, Cao H, Yan H, Su Z. A low-polarity small organic molecule with a stable keto form for photocatalytic H 2 evolution. Chem Commun (Camb) 2022; 58:9381-9384. [PMID: 35904532 DOI: 10.1039/d2cc03951f] [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
Five small organic molecules (SOMs) with different degrees of enol to keto tautomerism were synthesized for photocatalytic H2 evolution. The SOM possessing the highest activity features a stable keto form that greatly facilitates the flowing of the excited electrons toward the carbonyl O site where the reduction reaction occurs.
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Affiliation(s)
- Qing Yang
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Cefei Zhang
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Fangli Yi
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Xinyu Li
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Yiqi Yuan
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Kewei Liu
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Hongmei Cao
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Hongjian Yan
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
| | - Zhishan Su
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610065, China.
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3
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Gram-Scale Synthesis of Carbon-Supported Sub-5 nm PtNi Nanocrystals for Efficient Oxygen Reduction. METALS 2022. [DOI: 10.3390/met12071078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The preparation of a high performance and durability with low-platinum (Pt) loading oxygen reduction catalysts remains a challenge for the practical application of fuel cells. Alloying Pt with a transition metal can greatly improve the activity and durability for oxygen reduction reaction (ORR). In this work, we present a one-pot wet-chemical strategy to controllably synthesize carbon supported sub-5 nm PtNi nanocrystals with a ~3% Pt loading. The as-prepared PtNi/C-200 catalyst with a Pt/Ni atomic ratio of 2:3 shows a high oxygen reduction activity of 0.66 A mgpt−1 and outstanding durability over 10,000 potential cycles in 0.1 M KOH in a half-cell condition. The PtNi/C-200 catalyst exhibits the highest ORR activity, with an onset potential (Eonset) of 0.98 V and a half-wave potential (E1/2) of 0.84 V. The mass activity and specific activity are 3.89 times and 9.16 times those of 5% commercial Pt/C. More importantly, this strategy can be applied to the gram-scale synthesis of high-efficiency electrocatalysts. As a result, this effective synthesis strategy has a significant meaning in practical applications of full cells.
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4
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Liu H, Chen M, Sun F, Zaman S, Wang M, Wang H. Elucidating the Correlation between ORR Polarization Curves and Kinetics at Metal-Electrolyte Interfaces. ACS APPLIED MATERIALS & INTERFACES 2022; 14:13891-13903. [PMID: 35274947 DOI: 10.1021/acsami.1c24153] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The metal-vacuum models used to analyze the thermodynamics of the oxygen reduction reaction (ORR) completely overlook the role of electrolytes in the electrochemical process and thus cannot reflect the actual kinetic process occurring at the metal-electrolyte interface. Therefore, based on the real experimental process, the current work elucidates the chemical interactions between the electrolyte and the chemical species for the ORR via a novel metal-electrolyte model for the first time by effectively elucidating the correlation between ORR kinetics and polarization curves. Our simulation model analysis comprises the study of all possible ORR mechanisms on different Pt surfaces (Pt(111), Pt(110), and Pt(100)) and PtNi alloys with different compositions (Pt3Ni(111), Pt2Ni2(111), and PtNi3(111)). The obtained results demonstrate that the hydrogenation of adsorbed oxygen to form adsorbed hydroxyl (R8), whose immense control weight is reflected by a coverage of adsorbed oxygen (θO*) of about 1, is the rate-determining step (RDS) in the four-electron-dominated ORR process. A direct correlation has been established by the great fitting of polarization curves from theoretical ORR kinetics obtained via both the metal-electrolyte model and experimental measurement. This study reveals that among the different Pt surfaces and PtNi alloys, Pt3Ni(111) exhibits the highest ORR activity with the lowest free energy barrier of Ea (0.74 eV), the smallest value of |ΔGO* - 2.46| (0.80 eV), the highest reaction rate r (9.98 × 105 s-1 per site), and a more positive half-wave potential U1/2 (0.93 V). In contrast to previous model studies, this work provides a more accurate theoretical system for catalyst screening, which will help researchers to better understand the experimental phenomena and will be a guiding piece of work for catalyst design and development.
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Affiliation(s)
- Haijun Liu
- Harbin Institute of Technology, Harbin, 150001, China
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Ministry of Education Key Laboratory of Energy Conversion and Storage Technologies, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Ming Chen
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Ministry of Education Key Laboratory of Energy Conversion and Storage Technologies, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Fengman Sun
- Harbin Institute of Technology, Harbin, 150001, China
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Ministry of Education Key Laboratory of Energy Conversion and Storage Technologies, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Shahid Zaman
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Ministry of Education Key Laboratory of Energy Conversion and Storage Technologies, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Min Wang
- Ministry of Education Key Laboratory of Energy Conversion and Storage Technologies, Southern University of Science and Technology, Shenzhen, 518055, China
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, Guangdong Province 518055, China
| | - Haijiang Wang
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Ministry of Education Key Laboratory of Energy Conversion and Storage Technologies, Southern University of Science and Technology, Shenzhen, 518055, China
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Xie YX, Cen SY, Ma YT, Chen HY, Wang AJ, Feng JJ. Facile synthesis of platinum-rhodium alloy nanodendrites as an advanced electrocatalyst for ethylene glycol oxidation and hydrogen evolution reactions. J Colloid Interface Sci 2020; 579:250-257. [DOI: 10.1016/j.jcis.2020.06.061] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 05/29/2020] [Accepted: 06/13/2020] [Indexed: 02/01/2023]
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7
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YAO Y, XIAO Q, TSUDA T, KUWABATA S. PtNi Alloy Nanoparticle-Supported MWCNTs Produced in a Nickel(II) Oxalate Dihydrate Dispersed Ionic Liquid with Pt(acac) 2 by One-Pot Pyrolysis Method. ELECTROCHEMISTRY 2020. [DOI: 10.5796/electrochemistry.20-64065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Yu YAO
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | - Qingning XIAO
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | - Tetsuya TSUDA
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | - Susumu KUWABATA
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
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Yao D, Xu T, Yuan J, Tao Y, He G, Chen H. Graphene Based Copper‐Nickel Bimetal Nanocomposite: Magnetically Separable Catalyst for Reducing Hexavalent Chromium. ChemistrySelect 2020. [DOI: 10.1002/slct.201904931] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dachuan Yao
- Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou UniversityKey Laboratory of Advanced Catalytic Materials and TechnologyAdvanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou Jiangsu Province 213164 China
| | - Tingting Xu
- Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou UniversityKey Laboratory of Advanced Catalytic Materials and TechnologyAdvanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou Jiangsu Province 213164 China
| | - Jingjing Yuan
- Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou UniversityKey Laboratory of Advanced Catalytic Materials and TechnologyAdvanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou Jiangsu Province 213164 China
- School of Chemical EngineeringNanjing University of Science and Technology Nanjing Jiangsu 210094 China
| | - Yingrui Tao
- Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou UniversityKey Laboratory of Advanced Catalytic Materials and TechnologyAdvanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou Jiangsu Province 213164 China
| | - Guangyu He
- Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou UniversityKey Laboratory of Advanced Catalytic Materials and TechnologyAdvanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou Jiangsu Province 213164 China
| | - Haiqun Chen
- Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou UniversityKey Laboratory of Advanced Catalytic Materials and TechnologyAdvanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou Jiangsu Province 213164 China
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Chen HY, Niu HJ, Ma X, Feng JJ, Weng X, Huang H, Wang AJ. Flower-like platinum-cobalt-ruthenium alloy nanoassemblies as robust and highly efficient electrocatalyst for hydrogen evolution reaction. J Colloid Interface Sci 2020; 561:372-378. [DOI: 10.1016/j.jcis.2019.10.122] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 10/31/2019] [Accepted: 10/31/2019] [Indexed: 11/16/2022]
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10
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Liu Z, Yin Y, Yang D, Zhang C, Ming P, Li B, Yang S. Efficient synthesis of Pt–Co nanowires as cathode catalysts for proton exchange membrane fuel cells. RSC Adv 2020; 10:6287-6296. [PMID: 35496016 PMCID: PMC9049649 DOI: 10.1039/d0ra00264j] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 02/05/2020] [Indexed: 11/28/2022] Open
Abstract
A simple and efficient method was used to prepare highly active and durable carbon-supported ultrathin Pt–Co nanowires (NWs) as oxygen reduction reaction (ORR) catalysts for the cathode in a proton exchange membrane fuel cell (PEMFC). Chromium hexacarbonyl plays a significant role in making Pt and Co form an alloyed NW, which acts as both a reducing agent and a structure directing agent. The nanocrystal exhibits a uniform nanowire morphology with a diameter of 2 nm and a length of 30 nm. In half cell tests, the Pt–Co NWs/C catalyst has a mass activity of 291.4 mA mgPt−1, which is significantly better than commercial Pt/C catalysts with 85.5 mA mgPt−1. And after the accelerated durability test (ADT), Pt–Co NWs/C shows an electrochemically active surface area (ECSA) loss of 19.1% while the loss in the commercial catalyst is 41.8%. Also, the membrane electrode assembly (MEA) was prepared using Pt–Co NWs/C as the cathode catalyst, resulting in a maximum power density of 952 mW cm−2, which is higher than that of Pt/C. These results indicate that the one-dimensional structure of the catalyst prepared herein is favorable to improve the activity and durability, and the application of the catalyst in the MEA is also realized. A simple and efficient method was used to prepare highly active and durable carbon-supported ultrathin Pt–Co nanowires (NWs) as oxygen reduction reaction (ORR) catalysts for the cathode in a proton exchange membrane fuel cell (PEMFC).![]()
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Affiliation(s)
- Zhikun Liu
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
- China
- Collaborative Innovation Center of Henan Province for Motive Power and Key Materials
| | - Yanhong Yin
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
- China
- Collaborative Innovation Center of Henan Province for Motive Power and Key Materials
| | - Daijun Yang
- Clean Energy Automotive Engineering Center and School of Automotive Studies
- Tongji University
- Shanghai 201804
- China
| | - Cunman Zhang
- Clean Energy Automotive Engineering Center and School of Automotive Studies
- Tongji University
- Shanghai 201804
- China
| | - Pingwen Ming
- Clean Energy Automotive Engineering Center and School of Automotive Studies
- Tongji University
- Shanghai 201804
- China
| | - Bing Li
- Clean Energy Automotive Engineering Center and School of Automotive Studies
- Tongji University
- Shanghai 201804
- China
| | - Shuting Yang
- School of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
- China
- Collaborative Innovation Center of Henan Province for Motive Power and Key Materials
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11
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Campos-Roldán C, Calvillo L, Granozzi G, Alonso-Vante N. Alkaline hydrogen electrode and oxygen reduction reaction on PtxNi nanoalloys. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2019.113449] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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12
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Gao S, Yang X, Liang S, Wang YH, Zang HY, Li YG. One step synthesis of PtNi electrocatalyst for methanol oxidation. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.05.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Chen XL, Wen GL, Huang H, Wang AJ, Wang ZG, Feng JJ. Uric acid supported one-pot solvothermal fabrication of rhombic-like Pt 35Cu 65 hollow nanocages for highly efficient and stable electrocatalysis. J Colloid Interface Sci 2019; 540:486-494. [PMID: 30665171 DOI: 10.1016/j.jcis.2019.01.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/04/2019] [Accepted: 01/05/2019] [Indexed: 11/19/2022]
Abstract
High activity and good durability of electrocatalysts are of significance in practical applications of fuel cells. Among them, multi-component metallic hollow nanocages/nanoframes show great potential as advanced catalysts because of their highly open structures, large surface area and good stability. Herein, we report a general uric acid-mediated solvothermal method for shape-controlled synthesis of rhombic-like Pt35Cu65 hollow nanocages (HNCs) with uric acid as co-reductant and co-structure-directing agent. Uric acid and cetyltrimethylammonium chloride (CTAC) played important roles in the hollow cages. The specific architectures showed remarkably enhanced catalytic properties towards glycerol oxidation reaction (GOR), ethylene glycol oxidation reaction (EGOR) and oxygen reduction reaction (ORR) with the enhanced specific activity, outperforming commercial Pt/C (20 wt%). This work provides a new avenue for rational design of novel bimetallic nanocatalysts with enhanced characters in energy storage and conversion.
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Affiliation(s)
- Xue-Lu Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Gui-Lin Wen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Hong Huang
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China
| | - Ai-Jun Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
| | - Zhi-Gang Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Jiu-Ju Feng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
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14
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Chaudhari NK, Joo J, Kim B, Ruqia B, Choi SI, Lee K. Recent advances in electrocatalysts toward the oxygen reduction reaction: the case of PtNi octahedra. NANOSCALE 2018; 10:20073-20088. [PMID: 30376016 DOI: 10.1039/c8nr06554c] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Designing highly efficient and durable electrocatalysts for the oxygen reduction reaction (ORR), the key step for the operation of polymer electrolyte membrane fuel cells (PEMFCs), is of a pivotal importance for advancing PEMFC technology. Since the most significant progress has been made on Pt3Ni(111) alloy surfaces, nanoscale PtNi alloy octahedra enclosed by (111) facets have emerged as promising electrocatalysts toward the ORR. However, because their practical uses have been hampered by the cost, sluggish reaction kinetics, and poor durability, recent advances have engendered a wide variety of structure-, size-, and composition-controlled bimetallic PtNi octahedra. Herein, we therefore review the important recent developments of PtNi octahedral electrocatalysts point by point to give an overview of the most promising strategies. Specifically, the present review article focuses on the synthetic methods for the PtNi octahedra, the core-shell and multi-metallic strategies for performance improvement, and their structure-, size-, and composition-control-based ORR activity. By considering the results achieved in this field, a prospect for this alloy nanocatalysts system for future sustainable energy applications is also proposed.
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Affiliation(s)
- Nitin K Chaudhari
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea. and Research Institute of Natural Sciences (RINS), Korea University, Seoul 02841, Republic of Korea
| | - Jinwhan Joo
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea.
| | - Byeongyoon Kim
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea.
| | - Bibi Ruqia
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Sang-Il Choi
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Kwangyeol Lee
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea.
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15
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Mardle P, Du S. Annealing Behaviour of Pt and PtNi Nanowires for Proton Exchange Membrane Fuel Cells. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1473. [PMID: 30126232 PMCID: PMC6120042 DOI: 10.3390/ma11081473] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 08/11/2018] [Accepted: 08/14/2018] [Indexed: 01/18/2023]
Abstract
PtNi alloy and hybrid structures have shown impressive catalytic activities toward the cathodic oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, such promise does not often translate into improved electrode performances in PEMFC devices. In this contribution, a Ni impregnation and subsequent annealing method, translatable to vertically aligned nanowire gas diffusion electrodes (GDEs), is shown in thin-film rotating disk electrode measurements (TFRDE) to enhance the ORR mass activity of Pt nanowires (NWs) supported on carbon (Pt NWs/C) by around 1.78 times. Physical characterisation results indicate that this improvement can be attributed to a combination of Ni alloying of the nanowires with retention of the morphology, while demonstrating that Ni can also help improve the thermal stability of Pt NWs. These catalysts are then tested in single PEMFCs. Lower power performances are achieved for PtNi NWs/C than Pt NWs/C. A further investigation confirms the different surface behaviour between Pt NWs and PtNi NWs when in contact with electrolyte ionomer in the electrodes in PEMFC operation. Indications are that this interaction exacerbates reactant mass transport limitations not seen with TFRDE measurements.
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Affiliation(s)
- Peter Mardle
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
| | - Shangfeng Du
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
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16
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Huang XY, Zhu XY, Zhang XF, Zhang L, Feng JJ, Wang AJ. Simple solvothermal synthesis of uniform Pt66Ni34 nanoflowers as advanced electrocatalyst to significantly boost the catalytic activity and durability of hydrogen evolution reaction. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.03.169] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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17
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Zheng Y, Qiao J, Yuan J, Shen J, Wang AJ, Gong P. One-pot synthesis of a PtPd dendritic nanocube cage superstructure on graphenes as advanced catalysts for oxygen reduction. NANOTECHNOLOGY 2018; 29:10LT01. [PMID: 29336352 DOI: 10.1088/1361-6528/aaa809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
How to use Pt economically and efficiently in the oxygen reduction reaction (ORR) is of theoretical and practical significance for the industrialization of the proton-exchange membrane fuel cells. In order to minimize Pt consumption and optimize the ORR performance, the ORR catalysts are recommended to be designed as a porous nanostructure. Herein, we report a one-pot solvothermal strategy to prepare PtPd dendritic nanocube cages via a galvanic replacement mechanism triggered by an I- ion. These PtPd alloy crystals are nanoporous, and uniformly dispersed on reduced graphene oxides (RGOs). The size of the PtPd dendritic nanocube cages can be easily tuned from 20-80 nm by controlling their composition. Their composition is optimized to be 1:5 Pt/Pd atomic ratio for these RGO-supported PtPd dendritic nanocages. This catalyst shows superior ORR performance with a specific activity of 2.01 mA cm-2 and a mass activity of 4.45 A mg-1 Pt, far above those for Pt/C catalysts (0.288 mA cm-2 for specific activity, and 0.21 A mg-1 Pt for mass activity). In addition to ORR activity, it also exhibits robust durability with almost negligible decay in ORR mass activity after 10 000 voltammetric cycling.
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Affiliation(s)
- Yuanyuan Zheng
- Key laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Life Sciences and Chemistry, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, Zhejiang, 321004 People's Republic of China
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18
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Gao G, Zhang Z, Wang K, Yuan Q, Wang X. One-pot synthesis of dendritic Pt 3Ni nanoalloys as nonenzymatic electrochemical biosensors with high sensitivity and selectivity for dopamine detection. NANOSCALE 2017; 9:10998-11003. [PMID: 28752884 DOI: 10.1039/c7nr03760k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Preparation of Pt-based nanocatalysts with high catalytic activity and exploration of their novel applications have attracted significant interest in the nanoscale field. Herein, we report a facile synthesis of dendritic Pt3Ni nanoalloys and their applications for electrochemical nonenzymatic dopamine biosensors. As a result of their unique structure, the dendritic Pt3Ni nanoalloys show high electrocatalytic activity towards dopamine oxidation. Amperometric dopamine biosensors based on dendritic Pt3Ni nanoalloy microelectrode exhibit a wide linear detection ranges from 0.5 μM to 250 μM with ultrahigh sensitivity, fast response, and excellent selectivity at a potential of 0.3 V in a 0.1 M phosphate buffered solution (pH = 7.2). The limit of detection on dendritic Pt3Ni nanoalloy microelectrodes can decrease down to 10 nM, which is the least concentration of dopamine in serum samples with a value of sensitivity up to 4.6 μA mg-1Pt cm-2. This study shows an effective approach for the development of dendritic Pt3Ni nanoalloys as electrocatalysts for electrochemical nonenzymatic dopamine biosensors.
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Affiliation(s)
- Ge Gao
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou province 550025, P. R. China.
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Xing S, Yu X, Wang G, Yu Y, Wang Y, Xing Y. Confined polyaniline derived mesoporous carbon for oxygen reduction reaction. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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