Publications by authors named "Nadezda Kongi"
The use of precious metal electrocatalysts in clean electrochemical energy conversion and storage applications is widespread, but the sustainability of these materials, in terms of their availability and cost, is constrained. In this research, iron triad-based bimetallic nitrogen-doped carbon (M-N-C) materials were investigated as potential bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The synthesis of bimetallic FeCo-N-C, CoNi-N-C, and FeNi-N-C catalysts involved a precisely optimized carbonization process of their respective metal-organic precursors.
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- Improved oxygen electrocatalysis is important for meeting rising energy demands, and metal-nitrogen-carbon (M-N-C) materials are promising catalysts due to their tunable properties.
- The impact of variable surface curvature on these M-N-C materials has been largely unexplored, prompting the development of a new model to better understand this complexity.
- The study found that adjusting surface curvature can enhance catalytic activity for both oxygen reduction and evolution reactions through modifications in scaling relations and energy barriers.
The oxygen reduction reaction (ORR) activity and stability of Pt catalysts deposited on graphene-coated alumina nanofibres (GCNFs) were investigated. The GCNFs were fabricated by catalyst-free chemical vapour deposition. Pt nanoparticles (NPs) were deposited on the nanofibres by sonoelectrochemical and plasma-assisted synthesis methods.
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