作者: Munyaradzi Shumba , Tebello Nyokong
DOI: 10.1016/J.ELECTACTA.2017.03.154
关键词: Inorganic chemistry 、 Chemistry 、 Oxide 、 Colloidal gold 、 Adsorption 、 Cobalt 、 Phthalocyanine 、 Detection limit 、 Graphene 、 Nanorod
摘要: Abstract Sulfur and nitrogen affinity for gold is utilized to self-assemble nanorods (AuNRs) on S, N doped or S/N co-doped graphene oxide nanosheets (SGONS/AuNRs, NGONS/AuNRs SNGONS/AuNRs) enhancement of the electrocatalytic activity nanosized cobalt tetra aminophenoxy phthalocyanine (complex 1 ) towards hydrogen peroxide detection. Of electrodes containing AuNRs, 1- SNGONS/AuNRs-GCE gave lowest limits detection (LOD) 0.012 μM followed by SGONS/AuNRs-GCE AuNRs-SNGONS(seq)-GCE both with LOD 0.016 μM. This work shows that in absence GONS (when AuNRs are alone presence /AuNRs-GCE), unfavorable obtained doping important improving LOD. showed concentration dependent mechanisms resulting two adsorption Gibbs energies (ΔG o −18.55 kJ mol −1 −17.35 kJ mol at high low concentrations, respectively.