Oxygen Reduction Reaction at Carbon-Based Particles Prepared by Microwave-Assisted Catalytic Decomposition Measured in Acetonitrile

Abstract

New carbon-based particles prepared using methane by microwave-assisted catalytic decomposition has been developed. The carbon-based particles contained a nanographene-covered nickel, carbon nanotube, and others. In non-aqueous solvent, an oxygen reduction reaction (ORR) at the carbon-based particles treated with acidic solution in advance was evaluated by a porous microelectrode based on electrochemical methods. The ORR was compared to commercially available carbon fiber, polycrystalline platinum, and polycrystalline gold microelectrode.

Electrochemical Detection of Free Chlorine Using Ni Metal Nanoparticles Combined with Multilayered Graphene Nanoshells

“…In late years, microwave‐assisted synthesis and microwave‐assisted catalytic decomposition have attracted attention as innovative green technologies . Recently, we have developed a new C−M composite powder, Ni metal@multilayered graphene as the main component, synthesized from CH 4 via multimode microwave‐assisted catalytic decomposition . In Ni metal@multilayered graphene, carbon growth is promoted by Ni particles, with methane storage capacity contained in decomposition catalysts (Ni powder, SiC, Mo 2 C, and HZSM‐5), combined with multimode microwave heating, and the surface of the Ni particle is covered with multilayered graphene.…”

“…The C−M composite powder was prepared using a multimode microwave reactor (μReactor Ex; output: 450 W at 2.45 GHz; flow: 50 mL min −1 ; net running time: 600 min; Shikoku Instrumentation Co., Ltd) . The decomposition catalysts used in the reactor were composed of SiC (30.3 wt.%) as the microwave absorber and a mixture of Ni powder (20.2 wt.%), HZSM‐5 (48.5 wt.%), and Mo 2 C (1.0 wt.%) as the CH 4 decomposition components.…”

Imaging and Characterization of Ni@OLC Synthesized by Microwave‐Assisted Catalytic Methane Decomposition

“…We reported in a rapid communication our application of this new material as electrode catalysts for polymer electrolyte fuel cell cathodes, acidic water electrolysis, and hypochlorous acid reduction. [56][57][58][59] In Equation 1, the growth of OLC is presumably promoted by Ni particles in the methane decomposition catalyst and the surface of the Ni particles is covered with graphene. However, the detailed mechanism of this reaction has not been clarified.…”

Electrocatalytic Hydrogen Evolution Reaction with Multilayer Graphene-Covered Ni Particles Synthesized by Microwave-Assisted Catalytic Methane Decomposition

“…In recent years, Ni and C based catalysts have been reported to exhibit HER activity comparable to that of Pt/C in an acidic medium (7). Also, we synthesized a new C-Ni powder (8)(9)(10), which contained multilayer graphene-covered Ni particles (Ni@C) as the main component, by multimode microwave-assisted catalytic CH 4 decomposition using a multimode microwave reactor. Microwave-assisted synthesis and microwave-assisted catalytic decomposition have attracted attention as innovative green technology (11)(12)(13).…”