Platinum nanostructures via self-assembly of an amyloid-like peptide: a novel electrocatalyst for the oxygen reduction

Abstract

An aniline-GGAAKLVFF peptide (AFP) was prepared by solid-phase synthesis. The peptide can readily self-assemble into fibrils. Platinum nanoparticles (Pt NPs) were directly immobilized on the surface of the AFP fibrils via electrostatic interaction. Compared to other currently available techniques for the fabrication of metal-peptide fibrils, the noncovalent functionalization strategy is able to deposit nanoparticles on peptide fibrils with different morphologies and high metal loading, which is important for applications in catalysis, electronic materials and other corresponding fields. The Pt-AFP fibrils were employed to modify the electrode, which exhibits high electrocatalytic activities towards oxygen reduction. Thus, the Pt-AFP fibrils hold great potential for polymer electrolyte fuel cells and other electrochemical applications.

Peptide-templated noble metal catalysts: syntheses and applications

“…6d). 99 In addition, Zhou et al 100 directly immobilized the negatively charged Pt nanoparticles evenly onto the positively charged surface of AFP (aniline-GGAAKLVFF) self-assembled fibrils via an electrostatic interaction technique, such that the morphology and dispersion of Pt NPs are strictly controlled and the catalytic performance is improved consequently (Fig. 6e).…”

Self-assembled peptide nanostructures for functional materials

“…Others have also exploited various self-assembled peptide templates such as I 3 K, phage-displayed P7A peptides [433] and aniline-GGAAKLVFF [434] to synthesize Pt nanoparticles for different applications. I 3 K assembled nanofibres have beenused to template Pt nanoparticles while phage-displayed P7A peptides were utilized to tune morphologies of Pt nanoparticles.…”

Conducting Polyaniline Nanowire Arrays Modified Electrode for High Performance Supercapacitor and Enhanced Catalysis of Nitrite Reduction

“…On the other hand, nitrite determination is of great significance due to its important role in environmental processes and its toxicity and suspected carcinogenicity in the human body. Among the various nitrite sensors, electrochemical ones that monitor the electrocatalytic conversion of solution species have attracted much attention because of their merits such as quick response times, high sensitivity, as well as having the ability to be miniaturized . It is well‐known that species such as nitrite can be oxidized or reduced if the potentials are within the certain potential range in which PANI is electro‐active .…”