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Tada K, Yamazaki SI, Asahi M, Ioroi T. Elucidation of the mechanism of melamine adsorption on Pt(111) surface via density functional theory calculations. Phys Chem Chem Phys 2023; 25:23047-23057. [PMID: 37599630 DOI: 10.1039/d3cp01777j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
The oxygen reduction reaction (ORR) activity of Pt catalysts in polymer electrolyte fuel cells (PEFCs) should be enhanced to reduce Pt usage. The adsorption of heteroaromatic ring compounds such as melamine on the Pt surface can enhance its catalytic activity. However, melamine adsorption on Pt and the consequent ORR enhancement mechanism remain unclear. In this study, we performed density functional theory calculations to determine the adsorption structures of melamine/Pt(111). Melamine was coordinated to Pt via two N lone pairs on NH2 and N- in the triazine ring, resulting in a chemisorption structure with slight electron transfer. Four types of adsorption structures were identified: three-point adsorption (two amino groups and a triazine ring: Type A), two-point adsorption (one amino group and a triazine ring: Type B), two-point adsorption (two amino groups: Type C), and one-point adsorption (one amino group: Type D). The most stable structure was Type B. However, multiple intermediate structures were formed owing to the conformational changes from the most stable to other stable adsorption structures. The resonance structures of the adsorbed melamine stabilise the adsorption, as increased resonance allows for more electron delocalisation. In addition, the lone-pair orbital of the amino group in the adsorbed melamine acquires the characteristics of an sp3 hybrid orbital, which prevents horizontal adsorption on the Pt surface. We believe that understanding these adsorption mechanisms will help in the molecular design of organic molecule-decorated Pt catalysts and will lead to the reduction of Pt usage in PEFCs.
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Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy (RIECEN), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| | - Shin-Ichi Yamazaki
- Research Institute of Electrochemical Energy (RIECEN), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| | - Masafumi Asahi
- Research Institute of Electrochemical Energy (RIECEN), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
| | - Tsutomu Ioroi
- Research Institute of Electrochemical Energy (RIECEN), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan.
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Wang H, Wang Y, Li C, Zhao Q, Cong Y. Introduction of Surface Modifiers on the Pt-Based Electrocatalysts to Promote the Oxygen Reduction Reaction Process. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13091544. [PMID: 37177089 PMCID: PMC10180714 DOI: 10.3390/nano13091544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/30/2023] [Accepted: 05/01/2023] [Indexed: 05/15/2023]
Abstract
The design of Pt-based electrocatalysts with high efficiency towards acid oxygen reduction reactions is the priority to promote the development and application of proton exchange membrane fuel cells. Considering that the Pt atoms on the surfaces of the electrocatalysts face the problems of interference of non-active species (such as OHad, OOHad, CO, etc.), high resistance of mass transfer at the liquid-solid interfaces, and easy corrosion when working in harsh acid. Researchers have modified the surfaces' local environment of the electrocatalysts by introducing surface modifiers such as silicon or carbon layers, amine molecules, and ionic liquids on the surfaces of electrocatalysts, which show significant performance improvement. In this review, we summarized the research progress of surface modified Pt-based electrocatalysts, focusing on the surface modification strategies and their mechanisms. In addition, the development prospects of surface modification strategies of Pt-based electrocatalysts and the limitations of current research are pointed out.
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Affiliation(s)
- Haibin Wang
- School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yi Wang
- School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
| | - Chunlei Li
- School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
| | - Qiuping Zhao
- School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
| | - Yuanyuan Cong
- School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China
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YAMADA H, MATSUMOTO K, KURATANI K, ARIYOSHI K, MATSUI M, MIZUHATA M. Preface for the 66th Special Feature “Novel Aspects and Approaches to Experimental Methods for Electrochemistry”. ELECTROCHEMISTRY 2022. [DOI: 10.5796/electrochemistry.22-66113] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Hirohisa YAMADA
- Department of Chemical Engineering, National Institute of Technology, Nara College
| | | | - Kentaro KURATANI
- Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Kingo ARIYOSHI
- Graduate School of Engineering, Osaka Metropolitan University
| | | | - Minoru MIZUHATA
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University
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Sulphonated melamine polymer for enhancing the oxygen reduction reaction activity and stability of a Pt catalyst. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116103] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Guo H, Xu H, Zhao C, Hao X, Yang Z, Xu W. High-effective generation of H2O2 by oxygen reduction utilizing organic acid anodized graphite felt as cathode. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Yamazaki SI, Asahi M, Taguchi N, Ioroi T, Kishimoto Y, Daimon H, Inaba M, Koga K, Kurose Y, Inoue H. Creation of a Highly Active Pt/Pd/C Core–Shell-Structured Catalyst by Synergistic Combination of Intrinsically High Activity and Surface Decoration with Melamine or Tetra-( tert-butyl)-tetraazaporphyrin. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03124] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Shin-ichi Yamazaki
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Masafumi Asahi
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Noboru Taguchi
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Tsutomu Ioroi
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Yuko Kishimoto
- Faculty of Science and Engineering, Doshisha University, 1-3 Miyakodani-Tatara, Kytotanabe, Kyoto 610-0321, Japan
| | - Hideo Daimon
- Faculty of Science and Engineering, Doshisha University, 1-3 Miyakodani-Tatara, Kytotanabe, Kyoto 610-0321, Japan
| | - Minoru Inaba
- Faculty of Science and Engineering, Doshisha University, 1-3 Miyakodani-Tatara, Kytotanabe, Kyoto 610-0321, Japan
| | - Kazunori Koga
- Engineering Department, ISHIFUKU Metal Industry Co., Ltd., 2-12-30 Aoyagi, Soka, Saitama 340-0002, Japan
| | - Yutaka Kurose
- Engineering Department, ISHIFUKU Metal Industry Co., Ltd., 2-12-30 Aoyagi, Soka, Saitama 340-0002, Japan
| | - Hideo Inoue
- Engineering Department, ISHIFUKU Metal Industry Co., Ltd., 2-12-30 Aoyagi, Soka, Saitama 340-0002, Japan
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