The effect of copper on the multiple carbon nanofilaments growths by the methane decomposition over the oxidized diamond-supported nickel–copper bimetallic catalyst

Abstract To clarify the indispensable parameters for multiple carbon nanofilaments (CNFs) growths, in other words, having a unique Octopus-like morphology consisting of Marimo-like (MC), we have systematically studied to synthesize MC by decomposition methane using oxidized diamond-supported Ni–Cu bimetallic catalysts. We discovered that Cu addition 20 wt.% weight and growth temperature region 550 °C 600 resulted many CNF forms from single catalyst particle, specifically "Octopus-like" CNFs. also several CNFs might occur dissolved sintered particles. described model process structure formation. expect gives enough space volume mass transfer, consequently, it should contribute realizing higher power generation performance polymer electrolyte fuel cell (PEFC) although under higher-voltage region.