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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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Mishakov IV, Bauman YI, Potylitsyna AR, Shubin YV, Plyusnin PE, Stoyanovskii VO, Vedyagin AA. Catalytic Properties of Bulk (1–x)Ni–xW Alloys in the Decomposition of 1,2-Dichloroethane with the Production of Carbon Nanomaterials. KINETICS AND CATALYSIS 2022. [DOI: 10.1134/s0023158422010037] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Metal dusting as a key route to produce functionalized carbon nanofibers. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-022-02169-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Popov AA, Shubin YV, Bauman YI, Plyusnin PE, Mishakov IV, Sharafutdinov MR, Maksimovskiy EA, Korenev SV, Vedyagin AA. Preparation of porous Co-Pt alloys for catalytic synthesis of carbon nanofibers. NANOTECHNOLOGY 2020; 31:495604. [PMID: 32990267 DOI: 10.1088/1361-6528/abb430] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A simple and convenient procedure for the production of highly dispersed porous Co-Pt alloys to be used as catalysts for the synthesis of nanostructured carbon fibers (CNF) has been developed. The technique is based on the thermal decomposition of specially synthesized multicomponent precursors in a reducing atmosphere. A series of porous single-phase alloys Co-Pt (10-75 at% Pt) have been synthesized. The alloys containing 75 and 50 at% Pt were identified by the x-ray diffraction analysis as the intermetallics CoPt3 and CoPt, respectively. Within the region of 10-35 at% Pt, the synthesized alloys are represented by Co1-x Pt x random solid solutions with face-centered cubic lattice. The alloys obtained are characterized by a porous structure consisting of assembled fragments with a size of 50-150 nm. The obtained alloys were tested in the catalytic chemical vapor deposition of the ethylene to CNF. A significant synergistic effect between Co and Pt in the synthesis of carbon nanomaterials (CNMs) was revealed. The yield of CNF (for 30 min reaction) for catalysts containing 25-35 at% Pt was 30-38 g(CNF)/g(cat), whereas those for Co (100%) and Pt (100%) samples were as low as 5.6 and >0.1 g(CNF)/g(cat), respectively. The produced CNM composed of fibers with a segmented structure was shown to be characterized by a rather high specific surface area (200-250 m2 g-1) and structural homogeneity.
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Affiliation(s)
- Anton A Popov
- Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia
| | - Yury V Shubin
- Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia
| | - Yury I Bauman
- Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
| | - Pavel E Plyusnin
- Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia
| | | | | | | | - Sergey V Korenev
- Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia
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Mishakov IV, Kutaev NV, Bauman YI, Shubin YV, Koskin AP, Serkova AN, Vedyagin AA. Mechanochemical Synthesis, Structure, and Catalytic Activity of Ni-Cu, Ni-Fe, and Ni-Mo Alloys in the Preparation OF Carbon Nanofibers During the Decomposition of Chlorohydrocarbons. J STRUCT CHEM+ 2020. [DOI: 10.1134/s0022476620050133] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bauman YI, Mishakov IV, Rudneva YV, Popov AA, Rieder D, Korneev DV, Serkova AN, Shubin YV, Vedyagin AA. Catalytic synthesis of segmented carbon filaments via decomposition of chlorinated hydrocarbons on Ni-Pt alloys. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.08.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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