A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine

Abstract

Designed fabrication of flexible metal alloy nanocluster–polyaniline hybrid materials for efficient (bio)electrochemical applications.

Au–Pt–Ni nanochains as dopamine catalysts: role of elements and their spatial distribution

“…4b ) for Au–Pt show the two peaks for 4f7/2 and 4f5/2 at B. E. of 71.2 and 74.5 eV corresponding to metallic Pt (with 3.3 eV spin–orbit coupling). 18 For Au–Ni–Pt and Au–Ni–Au–Pt, the two Pt peaks are shifted to slightly higher energy by 0.2 eV. This slight shift may indicate coupling between Pt and Ni domains.…”

“…Metallic Ni peak is observed at B. E. of 852.9 eV in the Au-Ni-Pt and Au-Ni-Au-Pt sample, while no such peak is observed in the Au-Ni sample. 18,20,21 The peak is also more prominent in the Au-Ni-Au-Pt sample than in Au-Ni-Pt. Further, all samples show peaks associated with oxidized Ni (Ni 2+ and/or Ni 3+ ).…”

Investigating the thermal stability of ultra-small Ag, Au and AuAg alloy nanoparticles embedded in a silica matrix

“…The practical applicability of these NPs is vastly dependent on their absorption cross-section, higher surface-to-volume ratio, and excellent chemical stability. 16,17 The optical cross-sections of these metal NPs are majorly dependent on the nature of their intrinsic dielectric function, and are moderately affected by the morphology of the NPs and the surrounding materials. Among all the mono-metals, Ag NPs show the strongest optical absorption cross-section at visible wavelengths due to localized surface plasmon resonance (LSPR) which results from their electronic structure, and thus depends on the dielectric function.…”

Free carrier enhanced depletion in ZnO nanorods decorated with bimetallic AuPt nanoclusters

“…[14][15][16][17] In addition, decoration with bimetallic clusters brings even more interesting features as further improvements have been obtained in sensing of alcohols, gas, and light and in catalysis for energy conversion, water splitting and purification activity. [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] In fact, bimetallic nanoclusters that allow integrating the physicochemical properties of two metals demonstrated enhanced properties in terms of catalysis, mag-netism and plasmonic effects. 21 AuPt nanoparticles (NPs) around 3 nm loaded onto ZnO nanorods improve their sensitivity to H 2 at room temperature with respect to monometallic nanoparticles.…”