On the Nature of Oxygen-Containing Surface Groups on Carbon Nanofibers and Their Role for Platinum Deposition—An XPS and Titration Study

Abstract

XPS and acid-base titrations were used to investigate the nature and stability of oxygen-containing surface groups on carbon nanofibers (CNF) and platinum-containing CNF. During heat treatments in inert atmosphere at 973 K all acidic (carboxylic) oxygen surface groups were removed for CNF. Introduction of platinum decreased the temperature at which the acidic oxygen surface groups could be removed to 773 K. It has been demonstrated that both carboxyl and phenol surface groups are able to bring about platinum ion adsorption during Pt/CNF synthesis.

Nitrogen-doped carbon nanomaterials: To the mechanism of growth, electrical conductivity and application in catalysis

“…Such functionalization is performed by the treatment of CNMs with various liquid oxidants, gas-phase oxidation, annealing in an inert, etc. For each particular case, an optimal method can be chosen to stabilize nanosized metallic particle and enhance the binding strength between metal and carbon surface [99][100][101]. However, such a treatment is accompanied by the appearance of extra defects in the carbon structure and can deteriorate the electrical and mechanical properties of the materials.…”

Nitrogen- and oxygen-containing activated carbons from sucrose for electrochemical supercapacitor applications

“…20,34,40,42,44,45 The C1s spectrum of CN B 900 exhibit three resolved peaks (C-I, C-II and C-III), centered at 284.5, 285.9 and 287.5 eV respectively. The peak O-II is due to oxygen in phenol, and/or in ether while the peak O-III is due to chemisorbed oxygen (carboxylic group) and/or water, respectively.…”

Interfacial Synthesis of Two-Dimensional Dendritic Platinum Nanoparticles Using Oleic Acid-in-Water Emulsion

“…Because the interface can provide diffusion-controlled growth conditions driven by the attraction of platinum precursors to the carboxyl headgroup of oleic acid, 29,30 small seeds would undergo further structural evolution to larger 2D dendritic nanoparticle at the interface.…”