Palladium/ruthenium supported on graphene oxide (PdRu@GO) as an efficient, stable and rapid catalyst for hydrogen production from DMAB under room conditions

Acıdereli, Hilal; Cellat, Kemal; Çalımlı, Mehmet Harbi; Sen, Fatih

doi:10.1016/j.renene.2020.07.105

Cited by 27 publications

(16 citation statements)

References 33 publications

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“…For PdRu/MWCNT‐GNP catalyst three peaks were observed at 2θ of 26.11°, 29.24° and 31.6° consistent to the C (002) characteristic diffraction peak, 52 establishing the presence of MWCNT‐GNP support material. The diffraction peaks were determined at 2θ of 39.99°, 46.65°, 68.07° and 81.9° were related to the Pd (111), (200), (220) and (311) characteristic diffraction peaks, respectively, relatively close to previous studies in the literature 53,54 . The 2θ peaks at about 45.34° and 56.415° can be attributed to the Ru (101) and (102) characteristic diffraction peaks 55 …”

Section: Resultssupporting

confidence: 84%

Investigation of hydrogen production from sodium borohydride by carbon nanotube‐graphenesupportedPdRubimetallic catalyst forPEMfuel cell application

Al-Msrhad

Devrim

Uzundurukan

et al. 2021

Intl J of Energy Research

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Summary In this study, hydrogen (H2) generation from the hydrolysis of sodium borohydride (NaBH4) catalyzed by bimetallic Palladium‐Ruthenium (PdRu) supported on multiwalled carbon nanotube‐graphene (MWCNT‐GNP) hybrid material is investigated. The effect of various parameters such as temperature, NaBH4 concentration, and catalyst loading and effect of base concentration are examined to observed optimum operating conditions. Experimental results show that the PdRu/MWCNT‐GNP bimetallic catalyst has high catalytic activity on NaBH4 hydrolysis reaction. It has been found that PdRu/MWCNT‐GNP catalyst shows low activation energy of 22.33 kJ/mol for hydrolysis reaction of NaBH4. The PdRu/MWCNT‐GNP catalyst also exhibits H2 generation rate of 79.2 mmol/min·gcat at 45°C. It shows good cycle stability in the catalyst reusability test and retained 89% of its initial catalytic activity after fifth use. The high catalytic activity of the PdRu/MWCNT‐GNP catalyst makes it promising in H2 generation from NaBH4 hydrolysis for commercial proton exchange membrane fuel cell (PEMFC) applications.

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Section: Resultssupporting

confidence: 84%

Investigation of hydrogen production from sodium borohydride by carbon nanotube‐graphenesupportedPdRubimetallic catalyst forPEMfuel cell application

Al-Msrhad

Devrim

Uzundurukan

et al. 2021

Intl J of Energy Research

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“…A microwave assisted reduction synthetic method via a mixture of PdCl 2 , RuCl 3 and GO, was employed for the synthesis of bimetallic-graphene composite. Reduction of the metal salts to metallic state was achieved with NaBH 4 , which was enhanced by holding the mixture in a microwave oven [116]. A method involving the mixture of GO/rGO precursor and nanoparticle precursors was described by Anand, et al [117] for the synthesis of rGO/Bi 2 Al 4 O 9 .…”

Section: Composites Of Graphene/graphene Derivativesmentioning

confidence: 99%

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Olatunde

Onwudiwe

2021

IJERPH

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The incessant release of pharmaceuticals into the aquatic environment continues to be a subject of increasing concern. This is because of the growing demand for potable water sources and the potential health hazards which these pollutants pose to aquatic animals and humans. The inability of conventional water treatment systems to remove these compounds creates the need for new treatment systems in order to deal with these class of compounds. This review focuses on advanced oxidation processes that employ graphene-based composites as catalysts for the degradation of pharmaceuticals. These composites have been identified to possess enhanced catalytic activity due to increased surface area and reduced charge carrier recombination. The techniques employed in synthesizing these composites have been explored and five different advanced oxidation processes—direct degradation process, chemical oxidation process, photocatalysis, electrocatalyis processes and sonocatalytic/sono-photocatalytic processes—have been studied in terms of their enhanced catalytic activity. Finally, a comparative analysis of the processes that employ graphene-based composites was done in terms of process efficiency, reaction rate, mineralization efficiency and time required to achieve 90% degradation.

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“…The (111), (200), and (220) diffraction peaks associated with the hcp crystalline phase of Pd-Ru and the diffraction peak of (002) corresponding to the crystalline phase of the MXene are observed in the SAED pattern. 37,38 37,39,40 The lattice constants of the major diffraction peak corresponding to the (111) lattice plane were estimated by Rietveld refinement as a = 0.2117 nm and c = 0.3651 nm for the hcp Pd-Ru lattice.…”

Section: Formation Mechanism Of the Pd-ru/mxene Catalystmentioning

confidence: 99%

Highly selective etherification of fructose and 5‐hydroxymethylfurfural over a novel Pd‐Ru/MXene catalyst for sustainable liquid fuel production

Govindan

Krishnamoorthy

Hai

et al. 2021

Intl J of Energy Research

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Sustainable liquid fuel production from bio-oil compounds has attracted considerable attention in recent years. The catalytic etherification of 5-hydroxymethylfurfural (HMF) to ethoxymethylfurfural (EMF) is an effective approach for the production of liquid fuels. However, the development of high-performance and chemically stable catalysts has remained challenging.In this work, ultra-small Pd-Ru NPs were successfully immobilized on the surfaces of 2D MXene nanosheets (Pd-Ru/MXene) via fish sperm DNA-assisted microwave process. HR-TEM imaging results with SAED analysis showed that the hexagonal closed-pack (hcp) Pd-Ru NPs were grown on the surfaces of sheet-like MXene, thus enhancing the specific surface area of 117 m 2 g −1 and providing a higher density of the acid-base sites. Furthermore, Pd-Ru/MXene was employed for the etherification of HMF into EMF. The results showed that the Pd-Ru/MXene catalyst exhibited 98% EMF yield and 100% HMF conversion with the prolonged usage of catalyst for five consecutive reuse cycles.Additionally, fructose was directly converted into EMF with a higher yield of 82% over the Pd-Ru/MXene catalyst at lower reaction conditions. The recyclability test of the used Pd-Ru/MXene catalyst demonstrated its chemical stability under prolonged usage for several hours and is therefore suitable for commercial renewable liquid fuel production. Novelty Statement• The catalytic transformation of biomass into diesel-miscible biofuel is a sustainable route for liquid fuel production and has recently attracted massive attention.• The chemically stable and high-performance Pd-Ru/MXene catalyst was successfully prepared and characterized.

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Palladium/ruthenium supported on graphene oxide (PdRu@GO) as an efficient, stable and rapid catalyst for hydrogen production from DMAB under room conditions

Cited by 27 publications

References 33 publications

Investigation of hydrogen production from sodium borohydride by carbon nanotube‐graphenesupportedPdRubimetallic catalyst forPEMfuel cell application

Investigation of hydrogen production from sodium borohydride by carbon nanotube‐graphenesupportedPdRubimetallic catalyst forPEMfuel cell application

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Highly selective etherification of fructose and 5‐hydroxymethylfurfural over a novel Pd‐Ru/MXene catalyst for sustainable liquid fuel production

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