Modification of multi-walled carbon nanotubes with platinum–osmium to develop stable catalysts for direct methanol fuel cells

Bekmezci, Muhammed; Gules, Gamze Nur; Bayat, Ramazan; Şen, Fatih

doi:10.1039/d2ay02002e

Cited by 11 publications

(2 citation statements)

References 48 publications

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“…After the reduction process was completed, the Pt@LLG electrocatalyst formed was collected by centrifugation at 4000 rpm and dried at room temperature. The same process was repeated to use the Pt catalyst without using LLG. , …”

Section: Methodsmentioning

confidence: 99%

Production of Sustainable Low-Layer Graphene by Green Synthesis at Room Conditions for Platinum-Based Direct Methanol Fuel Cell

Erduran,

Bayat,

Isik

et al. 2023

ACS Eng. Au

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Section: Methodsmentioning

confidence: 99%

Production of Sustainable Low-Layer Graphene by Green Synthesis at Room Conditions for Platinum-Based Direct Methanol Fuel Cell

Erduran,

Bayat,

Isik

et al. 2023

ACS Eng. Au

Self Cite

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“…Carbon nanotubes (CNTs) have recently become popular to be used as carbon support in electrocatalysts because of their extraordinary electrical, chemical, mechanical, and thermal characteristics, particularly their high surface-tovolume ratio (Lilloja et al, 2021;Devrim & Arıca, 2020;Mohideen et al, 2020;Fard et al, 2020;Wang et al, 2020d;Antolini, 2007;Matsumoto et al, 2004;Coq et al, 1998). Similarly, multi-walled carbon nanotubes (MWNTs) have attracted some attention as the superior carbon support for electrocatalysts (Wang et al, 2023;Bekmezci et al, 2023;Yang et al, 2019;Xu et al, 2006;Wu et al, 2005;Li et al, 2003). However, the most popular type of carbon support material for PEMFCs is still Vulcan XC-72 carbon black (Şahin et al, 2023;Alawadhi et al, 2020;Sapkota et al, 2022;Liu et al, 2004;Matsumoto et al, 2004;Bock et al, 2004).…”

Section: Performance Of Homemade Pt-ru Catalystmentioning

confidence: 99%

Carbon Monoxide-Resistant Anode Catalysts for Single-Cell Direct Carbon Monoxide Fuel Cells: Platinum-Ruthenium Anode Electrocatalysts

Zabihian,

Davari,

Osei-Prempeh

2023

IJRER

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The objective of this paper is to present the results of experimentations on the state-of-the-art anode electrocatalysts and the membrane-electrode assemblies (MEAs) developed for direct carbon monoxide fuel cells (DCMFCs). The custom-made platinum-ruthenium (Pt-Ru) MEAs along with a commercial MEA were tested to evaluate the impacts of cell temperature, different types of fuel and oxidant, the flow rate of fuel and oxidant, and humidification temperature on the performance of the MEAs. It was shown that both the catalyst manufacturing process and the test procedure are repeatable. Also, it was shown that the performance of Pt-Ru cells when fueled by CO and CO-containing fuels was markedly inferior to that of hydrogen-fueled fuel cells. However, there were some promising signs that with the right catalysts and optimum operating conditions, the performance of DCMFCs can be significantly improved. It was also shown that increasing the operating temperature always improved the performance. While increasing the flow rates of the reactants improved the performance of the MEAs, there was a limit to this improvement. Furthermore, generally speaking, the performance of the MEAs was better when fed with CO rather than CO-N2 and O2 rather than air but the actual impact depended on other operating conditions.

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Environmental Energy Production and Wastewater Treatment Using Synthesized Pd Nanoparticles with Biological and Photocatalytic Activity

Tiri,

Aygun,

Bekmezci

et al. 2024

Top Catal

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Metallic nanoparticles have attracted great attention in catalytic, medical diagnosis, and treatment research in recent years. The formation of palladium nanoparticles using rosemary (Rosmarinus officinalis L.) extract was carried out using the green synthesis method. The plant was extracted using 70% ethanol by microwave techniques. The novelty of this study is the investigation of the biological activities of green synthesis of Pd nanoparticles, such as DNA cleavage activity, antimicrobial activity, DPPH scavenging activity, and its electro-catalytic performance in alcohol oxidation. Additionally, photocatalytic activities were also evaluated. The characterization of synthesized palladium nanoparticles (Pd NPs) was performed by UV-spectrometry, XRD, FTIR, and TEM. According to TEM results, Pd nanoparticles were observed to have a spherical shape and an average particle size of 4.91 nm. The Pd NPs showed the photodegradation of MB solution by up to 79.9% at 120 min. The newly synthesized plant-mediated green synthesized Pd NPs showed the max and the min antimicrobial activity at 16 µg/mL and 256 µg/mL against L. pneumophila and C. albicans, respectively. The current density ratio of 48.22 mA/cm2 obtained in the study indicates that the obtained materials may be of interest in different applications. According to the results obtained, a direct relationship of extract use is observed in the synthesis of Pd nanoparticles and is a good way to reduce and stabilize metal salts. It has been determined that green Pd NPs have potential for use in energy production from alcohol oxidation and in medical applications.

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Modification of multi-walled carbon nanotubes with platinum–osmium to develop stable catalysts for direct methanol fuel cells

Abstract: In the study, a new bimetallic catalyst was synthesized for methanol oxidation using multi-walled carbon nanotube (MWCNT)-supported platinum–osmium (PtOs) nanoparticles (PtOs@MWCNT NPs). Obtained NPs were used as catalysts in electrochemical analyzes.

Cited by 11 publications

References 48 publications

Production of Sustainable Low-Layer Graphene by Green Synthesis at Room Conditions for Platinum-Based Direct Methanol Fuel Cell

Production of Sustainable Low-Layer Graphene by Green Synthesis at Room Conditions for Platinum-Based Direct Methanol Fuel Cell

Carbon Monoxide-Resistant Anode Catalysts for Single-Cell Direct Carbon Monoxide Fuel Cells: Platinum-Ruthenium Anode Electrocatalysts

Environmental Energy Production and Wastewater Treatment Using Synthesized Pd Nanoparticles with Biological and Photocatalytic Activity

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