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Abdelgawad A, Salah B, Eid K, Abdullah AM, Al-Hajri RS, Al-Abri M, Hassan MK, Al-Sulaiti LA, Ahmadaliev D, Ozoemena KI. Pt-Based Nanostructures for Electrochemical Oxidation of CO: Unveiling the Effect of Shapes and Electrolytes. Int J Mol Sci 2022; 23:15034. [PMID: 36499359 PMCID: PMC9737813 DOI: 10.3390/ijms232315034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/09/2022] [Accepted: 11/10/2022] [Indexed: 12/03/2022] Open
Abstract
Direct alcohol fuel cells are deemed as green and sustainable energy resources; however, CO-poisoning of Pt-based catalysts is a critical barrier to their commercialization. Thus, investigation of the electrochemical CO oxidation activity (COOxid) of Pt-based catalyst over pH ranges as a function of Pt-shape is necessary and is not yet reported. Herein, porous Pt nanodendrites (Pt NDs) were synthesized via the ultrasonic irradiation method, and its CO oxidation performance was benchmarked in different electrolytes relative to 1-D Pt chains nanostructure (Pt NCs) and commercial Pt/C catalyst under the same condition. This is a trial to confirm the effect of the size and shape of Pt as well as the pH of electrolytes on the COOxid. The COOxid activity and durability of Pt NDs are substantially superior to Pt NCs and Pt/C in HClO4, KOH, and NaHCO3 electrolytes, respectively, owing to the porous branched structure with a high surface area, which maximizes Pt utilization. Notably, the COOxid performance of Pt NPs in HClO4 is higher than that in NaHCO3, and KOH under the same reaction conditions. This study may open the way for understanding the COOxid activities of Pt-based catalysts and avoiding CO-poisoning in fuel cells.
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Affiliation(s)
- Ahmed Abdelgawad
- Center for Advanced Materials, Qatar University, Doha 2713, Qatar
- Gas Processing Center, College of Engineering, Qatar University, Doha 2713, Qatar
| | - Belal Salah
- Center for Advanced Materials, Qatar University, Doha 2713, Qatar
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, P O Wits, Johannesburg 2050, South Africa
| | - Kamel Eid
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, P O Wits, Johannesburg 2050, South Africa
| | | | - Rashid S. Al-Hajri
- Petroleum and Chemical Engineering Department, Sultan Qaboos University, Muscat 123, Oman
| | - Mohammed Al-Abri
- Nanotechnology Research Centre, Sultan Qaboos University, P.O. Box 17, PC 123, SQU, Al-Khoudh 123, Oman
- Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, PC 123, SQU, A-Khoudh 123, Oman
| | | | - Leena A. Al-Sulaiti
- Department of Mathematics, Statistics, and Physics, Qatar University, Doha 2713, Qatar
| | - Doniyorbek Ahmadaliev
- Andijan State Pedagogical Institute, Andijan 170100, Uzbekistan
- Presidential School in Andijan, Agency for Presidential Educational Institutions of the Republic of Uzbekistan, Andijan 170100, Uzbekistan
| | - Kenneth I. Ozoemena
- Gas Processing Center, College of Engineering, Qatar University, Doha 2713, Qatar
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Díez-Pascual AM. Carbon-Based Nanomaterials 3.0. Int J Mol Sci 2022; 23:ijms23169321. [PMID: 36012582 PMCID: PMC9408955 DOI: 10.3390/ijms23169321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 08/17/2022] [Indexed: 11/16/2022] Open
Abstract
Carbon-based nanomaterials are currently attracting a lot of interest in many fields, ranging from medicine and biotechnology to electronics, energy storage, and sensing applications [...]
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Affiliation(s)
- Ana M Díez-Pascual
- Universidad de Alcalá, Facultad de Ciencias, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona Km. 33.6, 28805 Alcalá de Henares, Madrid, Spain
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