Preparation of Platinum‐Poly(O‐dihydroxybenzene) Composite Catalyst and Its Electrocatalytic Activity Toward Methanol and Formic Acid Oxidation

Abstract

A composite catalyst has been successfully prepared by dispersing Pt nanoparticles on a poly(o‐dihydroxybenzene) (PoDHB) modified glassy carbon (GC) electrode and characterized by SEM, EDX, and electrochemical analysis. Compared with Pt nanoparticles deposited on the bare GC, the Pt/PoDHB/GC exhibits higher catalytic activity and stronger poisoning tolerance for electro‐oxidation of methanol and formic acid. The enhanced performance could be attributed to the increase of electrochemical active surface area (EASA) arisen from the PoDHB modification. Furthermore, performance limiting factors such as platinum loading, polymer mass, H2SO4, methanol, and formic acid concentrations have been evaluated for optimizing the electrocatalytic activities.

Synthesis of poly (2-Methoxyaniline)/sodium dodecyl sulfate film including bimetallic Pt–Cu nanoparticles and its application for formic acid oxidation

“…Forth tactic is to disperse the particles on the conductive supports such as conducting polymers (CPs) due to their porous structures, high surface areas and access to many catalytic sites to reduce the catalyst loading by keeping high catalytic activity. A number of CPs such as polyaniline [35,36], poly (5-cyanoindole) [37], poly (p-anisidine) [38], poly (o-dihydroxy benzene) [39], polythiophene [40,41], polypyrrole [42,43] and polyindole [44] have been investigated as catalyst supports towards formic acid electrooxidation. The CP improve the properties of electrode-electrolyte interface and allow a facile flow of electronic charges during the oxidation of small organic molecules on the Pt particles [45,46].…”