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, vol. Accepted Manuscript: 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., 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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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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