Preparation of Bimetallic Pd-Co Nanoparticles on Graphene Support for Use as Methanol Tolerant Oxygen Reduction Electrocatalysts

Singh, R.N.; Sharma, Chandra Shekhar

doi:10.48084/etasr.215

Cited by 16 publications

(4 citation statements)

References 48 publications

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“…The average crystallite size of Pd/G, Pd 3 −Co 1 /G and Pd 1 −Co 1 /G electrocatalysts were 5.7,4.2 and 3.6, respectively. From the obtained results, it can be concluded that by increasing the loading of Co, there was a decrease in the average crystallite size of Pd−Co [45].…”

Section: Resultsmentioning

confidence: 88%

Development of Noval Electrocatalyst Based on Graphene Supported Palladium‐Cobalt Nanoparticles as Hydrogen Evolution Catalyst for the Cost Effective Production of Hydrogen from Methanol

2022

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Production of hydrogen using conventional water electrolysis is not the convenient and effective way due to slow oxidation evaluation at the anode electrode. Electroreforming of organic substances such as methanol to generate hydrogen has been considered an innovative strategy. Herein, graphene (G) supported Pd3−Co1 (Pd3−Co1/G) catalyst was synthesized and employed as cathode catalyst to facilitate hydrogen evolution reaction (HER) in the electrochemical methanol reformation (ECMR) process. The structural characteristics of synthesized Pd3−Co1/G were determined by FE‐SEM, HR‐TEM, EDX, XRD, FT‐IR, UV, XPS, and ICP‐OES techniques. Furthermore, the electrocatalytic behavior of the proposed catalyst was evaluated by CV, LSV and EIS techniques in 0.5 M H2SO4. Electrochemical studies revealed that Pd3−Co1/G exhibited a large electrochemically active surface area (120 m2 g−1), good long‐term stability, low Tafel slope value (46 mV dec−1) and small Rct value (12 Ω). The practical utility of the developed catalyst towards hydrogen production in ECMR cell was tested at various experimental conditions using membrane electrode assemblies (MEAs) which were prepared using commercial Pt−Ru/C as anode and Pd3−Co1/G as cathode electrocatalysts respectively. The synthesized Pd3−Co1/G electrocatalyst exhibited superior cell performance for 50 h at 60 °C cell temperature with a cell voltage and current density of 0.58 V and 150 mA cm−2, respectively. The improvement in electrocatalytic activity could be attributed to alloying Pd with Co and the use of G as carbon support, which in turn enhanced the HER activity of Pd. Hence, the prepared Pd3−Co1/G can be used as an alternative to cathode electrocatalyst for HER in ECMR cells.

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Section: Resultsmentioning

confidence: 88%

Development of Noval Electrocatalyst Based on Graphene Supported Palladium‐Cobalt Nanoparticles as Hydrogen Evolution Catalyst for the Cost Effective Production of Hydrogen from Methanol

2022

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“…A similar result was also observed in several studies. For instance, insertion of Fe onto Pd supported on SiO 2 [10,11] increased Pd dispersion, leading to a decrease in Pd particle size; or incorporation of Co into Pd [12] resulted in formation of a solid solution (i.e. alloy) accompanied with reduction of the catalyst lattice parameter as well as its particle size.…”

Section: Influences Of Additives On Properties Of Pd/hzsm-5 Catalystmentioning

confidence: 99%

n-Hexane hydro-isomerization over promoted Pd/HZSM-5 catalysts

Dao

Lộc

2015

Adv. Nat. Sci: Nanosci. Nanotechnol.

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A series of Pd/HZSM-5 catalysts modified by various metallic species, including Co, Ni, Fe, Re, and Cu, was prepared by sequential impregnation. Contents of Pd and second metals in modified catalysts were 0.8 and 1.0 wt%, respectively. Physico-chemical characteristics of catalysts were investigated by nitrogen physi-sorption (BET), x-ray diffraction (XRD), transmission electron microscopy (TEM), ammonia temperature programmed desorption (NH 3 -TPD), temperature programmed reduction (TPR) and hydrogen pulse chemisorption (HPC). Coke formation was studied by the method of thermogravimetric analysis (TGA). The activities of catalysts in n-hexane isomerization were studied in a micro-flow reactor under atmospheric pressure at 250 °C, and molar ratio of H 2 : n-hexane of 5.92. It was found that Co, Ni, Fe, and Re additives exhibited geometric and electronic effects toward Pd/HZSM-5 catalyst, leading to an enhancement of its activity and stability. On the contrary, Cu additive caused Pd/HZSM-5 to become poorer in activity and stability.

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“…PMMA-graphene as a nanocomposite has a widely range of applications [11,12]. Graphene has a high surface area to volume ratio, and is considered as the thinnest material to date [13,14]. The presence of graphene as nano-sheets in polymer composites enhances flame retardancy by producing intumescent char during their combustion [15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Flame Retardancy of PMMA-Graphene Composite Materials

Al-Jarrah,

Rbeht,

Al-Waqfi

et al. 2024

Eng. Technol. Appl. Sci. Res.

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In this paper, Polymethyl methacrylate (PMMA)-graphene nano-composites were prepared and tested with the use of a cone calorimeter. Graphene was added to PMMA in limited weight percentages to improve the flame retardancy of PMMA. Two samples of PMMA-graphene, namely 1 and 3 wt%, were investigated. The combustion properties of the tested samples of PMMA-graphene composites, mass loss rate, heat release rate, and time to ignition were measured and calculated. It was found that the peak heat release rate of PMMA-graphene composites reduced by 17% when 3 wt% graphene was added to pure PMMA. Adding graphene to PMMA improves the thermal stability of PMMA by reducing the time of ignition. Also, the presence of graphene enhanced the formation of a continuous carbonized layer at the surface of the burned PMMA.

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Preparation of Bimetallic Pd-Co Nanoparticles on Graphene Support for Use as Methanol Tolerant Oxygen Reduction Electrocatalysts

Cited by 16 publications

References 48 publications

Development of Noval Electrocatalyst Based on Graphene Supported Palladium‐Cobalt Nanoparticles as Hydrogen Evolution Catalyst for the Cost Effective Production of Hydrogen from Methanol

Development of Noval Electrocatalyst Based on Graphene Supported Palladium‐Cobalt Nanoparticles as Hydrogen Evolution Catalyst for the Cost Effective Production of Hydrogen from Methanol

n-Hexane hydro-isomerization over promoted Pd/HZSM-5 catalysts

Experimental Study of the Flame Retardancy of PMMA-Graphene Composite Materials

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