Статья

Pt-Based Nanostructures for Electrochemical Oxidation of CO: Unveiling the Effect of Shapes and Electrolytes

Ahmed AbdelgawadCenter for Advanced Materials, Qatar University, Doha 2713, QatarBelal SalahCenter for Advanced Materials, Qatar University, Doha 2713, QatarKamel EidMolecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, P O Wits, Johannesburg 2050, South AfricaAboubakr M. AbdullahCenter for Advanced Materials, Qatar University, Doha 2713, QatarRashid Al‐HajriPetroleum and Chemical Engineering Department, Sultan Qaboos University, Muscat 123, OmanMohammed Al‐AbriDepartment of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, PC 123, SQU, A-Khoudh 123, OmanMohammad K. HassanCenter for Advanced Materials, Qatar University, Doha 2713, QatarLeena Al‐SulaitiDepartment of Mathematics, Statistics, and Physics, Qatar University, Doha 2713, QatarDoniyorbek AhmadalievAndijan State Pedagogical Institute, Andijan 170100, UzbekistanKenneth I. OzoemenaGas Processing Center, College of Engineering, Qatar University, Doha 2713, Qatar

International Journal of Molecular Sciencesjournal2022en

ABI

Аннотация

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.

Перевод пока недоступен

Темы

Electrocatalysts for Energy Conversion Catalytic Processes in Materials Science Gas Sensing Nanomaterials and Sensors

Идентификаторы

DOI: 10.3390/ijms232315034

Цитирования и источники

Цитирований: 1 Использованных источников: 62

Показатели — AkademScholar