Hemijska industrija 2003 Volume 57, Issue 9, Pages: 368-392
doi:10.2298/HEMIND0309368N
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Novel trends in electrocatalysis: Extended Brewer hypo-hyper-d-interionic bonding theory and selective interactive grafting of composite bifunctional electrocatalysts for simultaneous anodic hydrogen

Neophytides S.G., Zafeiratos S.H., Jakšić M.M.

Novel Trends in Electrocatalysis: Extended Brewer Hypo-Hyper-d-lnterionic Bonding Theory and Selective Interactive Grafting of Composite Bifunctional Electrocatalysts for Simultaneous Anodic Hydrogen and CO OxidationThe Extended Brewer Interactive Interionic Bonding Theory (EBIIBT) has been developed to show the equivalence of interatomic and interionic bonding features, and for their mutual combinations, as well as its effect upon electrocatalytic properties for the hydrogen electrode reactions (HELR). The equivalence of interionic hypo-hyper-d-interelectronic interaction in both metallic and any other ionic state and its effect upon electrocatalytic properties for hydrogen electrode reactions (HELR) has been proved and inferred. TG (Thermal Gravimetry) analysis of TPR (Temperature Programmed Reduction) of mixed hypc-hyper-d-electronic oxides of transition elements was broadly employed to prove the EBIIBT effect as reflected in dramatically decreased individual temperatures of their mutual reduction into intermetallic phases. The same interionic Brewer (and/or intermetallic) bonding effect has been confirmed both by UPD of hyper-d-upon hypo-d-electronic substrates and vice versa, and by the shift of bonding peaks in XPS analysis.

Keywords: Bifunctional electrocatalysts, Hydrogen electrode reactions (HER), Hypo-hyper-d-interelectronic interaction (HHDII), Selective catalyst grafting (anchoring), Interionic interactive promotion (IIP), Strong Metal Support Interaction (SMSI)

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