Publications

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2018
El-Nagar, G. A., I. Lauermann, R. M. Sarhan, and C. Roth, "Hierarchically Structured Iron-Doped Silver (Ag-Fe) Lotus Flowers for Efficient Oxygen Reduction Reaction", Nanoscale: The Royal Society of Chemistry, pp. - , 2018. AbstractWebsite

Developing cheap and efficient electrocatalysts for the oxygen reduction reaction (ORR) is vital for the immediate commercialization of fuel cells which are still limited by the high cost and low performance of the utilized commercial Pt-based electrodes. As a promising alternative, this study reports on the synthesis of hierarchical iron-doped silver lotus flowers (AgFelotus) as robust ORR electrocatalysts with outstanding tolerance against poisoning with various hydrocarbon impurities (HCs), in-situ generated during fuel cell operation, as well as different fuels from anodic crossover. AgFelotus exhibited a superior ORR activity with more than 40 times higher stability than the commercial Pt/C catalyst in alkaline media. This substantial performance enhancement is attributed to: (i) geometrically factor of the unique flower-like structure providing higher number of electroactive surface sites and (ii) electronically effect originated the electronic interaction between iron and silver particles facilitating ORR charge transfer resistance

Fetyan, A., G. A. El-Nagar, I. Derr, P. Kubella, H. Dau, and C. Roth, "A neodymium oxide nanoparticle-doped carbon felt as promising electrode for vanadium redox flow batteries", Electrochimica Acta: Pergamon, 2018. Abstract
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2017
El-Nagar, G. A., I. Derr, T. Kottakkat, and C. Roth, "Auspicious Metal-Doped-Cu2O/Cu Dendrite (M= Ni, Co, Fe) Catalysts for Direct Alkaline Fuel Cells: Effect of Dopants", ECS Transactions, vol. 80, issue 8: The Electrochemical Society, pp. 1013-1022, 2017. Abstract
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El-Nagar, G. A., R. M. Sarhan, A. Abouserie, N. Maticiuc, M. Bargheer, I. Lauermann, and C. Roth, "Efficient 3D-Silver Flower-like Microstructures for Non-Enzymatic Hydrogen Peroxide (H 2 O 2) Amperometric Detection", Scientific reports, vol. 7, issue 1: Nature Publishing Group, pp. 12181, 2017. Abstract
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El-Nagar, G. A., K. M. Dawood, M. S. El-Deab, and B. E. Al-Andouli, "Efficient direct formic acid fuel cell (DFAFC) anode of nano-sized palladium complex: High durability and activity origin", Applied Catalysis B: Environmental, vol. 213: Elsevier, pp. 118-126, 2017. Abstract
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El-Nagar, G. A., M. A. Hassan, I. Lauermann, and C. Roth, "Efficient Direct Formic Acid Fuel Cells (DFAFCs) Anode Derived from Seafood waste: Migration Mechanism", Scientific reports, vol. 7, issue 1: Nature Publishing Group, pp. 17818, 2017. Abstract
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El-Nagar, G. A., and C. Roth, "Enhanced electrooxidation of glucose at nano-chitosan–NiOOH modified GC electrode: fuel blends and hydrocarbon impurities", Physical Chemistry Chemical Physics, vol. 19, issue 3: Royal Society of Chemistry, pp. 2537-2548, 2017. Abstract
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El-Nagar, G. A., I. Derr, A. Fetyan, and C. Roth, "One-pot synthesis of a high performance chitosan-nickel oxyhydroxide nanocomposite for glucose fuel cell and electro-sensing applications", Applied Catalysis B: Environmental, vol. 204: Elsevier, pp. 185-199, 2017. Abstract
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El-Nagar, G. A., M. A. Hassan, A. Fetyan, M. K. Kayarkatte, I. Lauermann, and C. Roth, "A promising N-doped carbon-metal oxide hybrid electrocatalyst derived from crustacean’s shells: Oxygen reduction and oxygen evolution", Applied Catalysis B: Environmental, vol. 214: Elsevier, pp. 137-147, 2017. Abstract
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El-Nagar, G. A., A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, "Propitious Dendritic Cu2O–Pt Nanostructured Anodes for Direct Formic Acid Fuel Cells", ACS applied materials & interfaces, vol. 9, issue 23: American Chemical Society, pp. 19766-19772, 2017. Abstract
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2016
El‐Nagar, G. A., and C. Roth, "Impurity‐Induced Electrocatalysis: Unpredicted Enhancement Effect of Ammonia Impurity Towards Formic Acid Electro‐Oxidation", ChemistrySelect, vol. 1, issue 18, pp. 5706-5711, 2016. Abstract
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El-Nagar, G. A., A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, "Novel fuel blends facilitating the electro-oxidation of formic acid at a nano-Pt/GC electrode", RSC Advances, vol. 6, issue 35: Royal Society of Chemistry, pp. 29099-29105, 2016. Abstract
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El-Nagar, G. A., A. F. Darweesh, and I. Sadiek, "A novel nano-palladium complex anode for formic acid electro-oxidation", Electrochimica Acta, vol. 215: Pergamon, pp. 334-338, 2016. Abstract
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2015
El-Nagar, G. A., "Fuel blends: Enhanced electro-oxidation of formic acid in its blend with methanol at platinum nanoparticles modified glassy carbon electrodes", Journal of Power Sources, vol. 286, pp. 504-509, 2015. paper_8.pdf
Oral, A. Y., and Z. B. B. Oral, 3rd International Congress on Energy Efficiency and Energy Related Materials (ENEFM2015), , 2015. Abstract
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El-Refaei, S. M., G. A. El-Nagar, A. M. Mohammad, and B. E. El-Anadouli, "Electro-Oxidation of Formic Acid, Glucose, and Methanol at Nickel Oxide Nanoparticle Modified Platinum Electrodes", Progress in Clean Energy, Volume 1: Springer, Cham, pp. 595-604, 2015. Abstract
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El-Nagar, G. A., A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, "Electrocatalysis of Formic Acid Electro-Oxidation at Platinum Nanoparticles Modified Surfaces with Nickel and Cobalt Oxides Nanostructures", Progress in Clean Energy, Volume 1: Springer, Cham, pp. 577-594, 2015. Abstract
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El-Refaei, S. M., G. A. El-Nagar, A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, "Electrocatalytic Activity of NiOx Nanostructured Modified Electrodes Towards Oxidation of Small Organic Molecules", 2nd International Congress on Energy Efficiency and Energy Related Materials (ENEFM2014): Springer, Cham, pp. 397-403, 2015. Abstract
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El-Deab, M. S., G. A. El-Nagar, A. M. Mohammad, and B. E. El-Anadouli, "Fuel blends: Enhanced electro-oxidation of formic acid in its blend with methanol at platinum nanoparticles modified glassy carbon electrodes", Journal of Power Sources, vol. 286: Elsevier, pp. 504-509, 2015. Abstract
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El-Nagar, G. A., A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, "The Origin of Electrocatalytic Activity of Gold Nanoparticles Modified Pt-Based Surfaces Towards Formic Acid Oxidation", 2nd International Congress on Energy Efficiency and Energy Related Materials (ENEFM2014): Springer, Cham, pp. 379-387, 2015. Abstract
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Gumaa A. El-Nagar, Mohamed S. El-Deab, A. M. B. E. - A. M. E., "Promoting Effect of Hydrocarbon Impurities on the Electro-Oxidation of Formic Acid at Pt Nanoparticles Modified GC Electrodes", Electrochimica Acta, issue http://www.sciencedirect.com/science/art: Elsevier, pp. doi: 10.1016/j.electacta.2015.08.119, 2015. Abstract
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Mohammad, A. M., G. A. El-Nagar, I. M. Al-Akraa, M. S. El-Deab, and B. E. El-Anadouli, "Towards improving the catalytic activity and stability of platinum-based anodes in direct formic acid fuel cells", International Journal of Hydrogen Energy, vol. 40, issue 24: Pergamon, pp. 7808-7816, 2015. Abstract
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2014
El-Nagar, G. A., A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, "Electrocatalysis by nanoparticles: Optimization and Stability issue of Pt-Au binary catalysts for enhanced formic acid oxidation", Electrochemistry 2014, Basic Science and Key Technology for Future Applications, Mainz, Germany, September, 2014.
El-Nagar, G. A., A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, "Tolerance of NiOx Modified Pt/GC Electrode Towards Formic Acid Oxidation", Electrochemistry 2014, Basic Science and Key Technology for Future Applications, Mainz, Germany, September, 2014.
El-Nagar, G. A., A. M. Mohammad, M. S. El-Deab, and B. E. El-Anadouli, "Electrocatalysis by Nanoparticles: Oxidation of Formic Acid at Novel Pt/NiOx Nanoparticles-based Binary Catalysts", International conference on Industry-Academic Collaboration, Cairo, Egypt, March, 2014.
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