Electrochemical Synthesis of Mesoporous Pt Nanowires with Highly Electrocatalytic Activity toward Methanol Oxidation Reaction

Abstract

. (2015). Electrochemical synthesis of mesoporous Pt nanowires with highly electrocatalytic activity toward methanol oxidation reaction. Electrochimica Acta, 183 107-111.Electrochemical synthesis of mesoporous Pt nanowires with highly electrocatalytic activity toward methanol oxidation reaction AbstractSelf-supported one-dimensional (1D) mesoporous Pt nanowires (NWs) are prepared by confining micelle assembly in channels of a polycarbonate (PC) membrane. The obtained mesoporous Pt NWs show very high electrochemical activity and excellent durability as catalysts for methanol oxidation reaction (MOR) in comparison with the commercially available Pt black (PtB) catalyst. This work demonstrates that an appropriate combination of both self-supported 1D shape and mesoporous architecture indeed improve the electrocatalytic performances which is critical for further implementation and practical applications. Abstract: Self-supported one-dimensional (1D) mesoporous Pt nanowires (NWs) are prepared by utilizing micelle assembly in channels of a polycarbonate (PC) membrane. The obtained mesoporous Pt NWs show very high electrochemical activity and excellent durability as catalysts for methanol oxidation reaction (MOR), in comparison with the commercially available Pt black (PtB) catalyst. This work demonstrates that nice combination of both self-supported 1D shape and mesoporous architecture indeed improve the performance as electrocatalysts, which is an important finding for considering practical applications.

Effective ionic-liquid microemulsion based electrodeposition of mesoporous Co–Pt films for methanol oxidation catalysis in alkaline media

“…However, the high viscosity and low conductivity of these systems require deposition times approximately 30 times higher than the required time to attain the same deposition charge in aqueous solution. This fact limits a practical use of the water-in-ionic liquid (W/IL) microemulsions as an efficient methodology for preparing mesoporous structures [40,41]. In contrast, we demonstrate that ionic liquid-in-water (IL/W) microemulsions involve significantly lower depositions times and higher efficiencies in comparison with the W/IL systems.…”

“…The IL/W microemulsions were prepared by mixing the adequate aqueous solution with a non-ionic surfactant (Triton X-100) and an ionic liquid (IL, -bmimPF6) in a 83.8/15.1/1.1 % ratio (Table 1) [ [40][41][42][43][44].…”

“…On the other hand, the nanopowdered and compact samples seem to exhibit certain clustering of the grains after cycling. Notably, previous studies have shown that water-in-ionic liquid (W/IL) microemulsions, in semistirring conditions, were useful systems for preparing mesoporous materials [40,41]. However, the high viscosity and low conductivity of these systems require deposition times approximately 30 times higher than the required time to attain the same deposition charge in aqueous solution.…”

A comprehensive and critical review on recent progress in anode catalyst for methanol oxidation reaction

“…The one-dimensional mesoporous platinum nanowires displayed great durability, largely due to the self-assembled one-dimensional morphology that allows the presence of a large electrochemically active surfaces suitable for methanol oxidation. [60] 3.1.1.1. Pure platinum.…”

Research advances in unsupported Pt-based catalysts for electrochemical methanol oxidation

“…A much higher MOR activity can be achieved on the 1D unsupported Pt nanostructures, such as Pt NTs or NWs, owing to the thinner diameters compared with the Pt nanocubes or flowers [57,58] . Of course, the ultrathin nanowires and porous nanotubes would provide much for active sites and accessible surface.…”