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Ribeiro JYC, dos Anjos AV, Neto ESV, Aristides SS, Salazar-Banda GR, Eguiluz KIB. Influence of different carbon and SnO2 ratios on the activity of PtIr/C (SnO2)1 catalysts toward methanol oxidation. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Pt nanowires as electrocatalysts for proton-exchange membrane fuel cells applications: A review. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116185] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Ugartemendia A, Peeters K, Ferrari P, de Cózar A, Mercero JM, Janssens E, Jimenez-Izal E. Doping Platinum with Germanium: An Effective Way to Mitigate the CO Poisoning. Chemphyschem 2021; 22:1603-1610. [PMID: 34058042 DOI: 10.1002/cphc.202100407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Indexed: 11/12/2022]
Abstract
The vulnerability towards CO poisoning is a major drawback affecting the efficiency and long-term performance of platinum catalysts in fuel cells. In the present work, by a combination of density functional theory calculations and mass spectrometry experiments, we test and explain the promotional effect of Ge on Pt catalysts with higher resistance to deactivation via CO poisoning. A thorough exploration of the configurational space of gas-phase Ptn + and GePtn-1 + (n=5-9) clusters using global minima search techniques and the subsequent electronic structure analysis reveals that germanium doping reduces the binding strength between Pt and CO by hindering the 2π-back-donation. Importantly, the clusters remain catalytically active towards H2 dissociation. The ability of Ge to weaken the Pt-CO interaction was confirmed by mass spectrometry experiments. Ge can be a promising alloying agent to tune the selectivity and improve the durability of Pt particles, thus opening the way to novel catalytic alternatives for fuel cells.
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Affiliation(s)
- Andoni Ugartemendia
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia Saila, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain
| | - Kristien Peeters
- Quantum Solid-State Physics, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
| | - Piero Ferrari
- Quantum Solid-State Physics, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
| | - Abel de Cózar
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia Saila, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Euskadi, Spain
| | - Jose M Mercero
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia Saila, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain
| | - Ewald Janssens
- Quantum Solid-State Physics, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
| | - Elisa Jimenez-Izal
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia Saila, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Euskadi, Spain
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Huynh TT, Dang NN, Pham HQ. Bimetallic PtIr nanoalloy on TiO2-based solid solution oxide with enhanced oxygen reduction and ethanol electro-oxidation performance in direct ethanol fuel cells. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02056g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Elevating the electrocatalytic performance of both cathode and anode catalysts is critical to the advancement and widespread utilization of low-temperature fuel cells.
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Affiliation(s)
- Tai Thien Huynh
- Ho Chi Minh City University of Technology (HCMUT)
- Ho Chi Minh City
- Viet Nam
- Vietnam National University
- Ho Chi Minh City
| | - Nam Nguyen Dang
- Future Materials & Devices Lab
- Institute of Fundamental and Applied Sciences
- Duy Tan University
- Ho Chi Minh City
- Viet Nam
| | - Hau Quoc Pham
- Future Materials & Devices Lab
- Institute of Fundamental and Applied Sciences
- Duy Tan University
- Ho Chi Minh City
- Viet Nam
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