Gold Nanoparticles/Multi-Walled Carbon Nanotubes Hybrid as a Stable Catalyst for Oxygen Reduction Reaction
writer：Li Xiang, Zhihong Luo*, Chengliang Hu, Zhicheng Bian, Jianwei Lu, Yuan-Cheng Cao, Kun Luo*
keywords：gold nanoparticle, multi-walled carbon nanotube, catalyst, oxygen reduction reaction
source：期刊
specific source：ChemElectroChem
Issue time：2018年
A gold nanoparticles/multi-walled carbon nanotubes (Au/MWNTs) hybrid was prepared by
the scalable one-pot reduction of chloroauric acid with etrakis(hydroxymethyl)phosphonium
chloride in the presence of MWNTs. TEM, XRD, FT-IR, XPS and TG analyses indicate that gold nanoparticles (Au NPs, d≈2.9 nm) protected with tris(hydroxymethyl)phosphine oxide (THPO) ligand were deposited on the MWNTs, where no Oswald ripening was observed for the Au NPs after 3000 voltammetric cycling. The Au/MWNTs hybrid with THPO ligand exhibits an impressive catalytic activity on oxygen reduction reaction (ORR) following the direct four-electron mechanism in alkaline solutions, and also manifests excellent long-term cycling durability and tolerance to the possible crossover methanol, which is prospective to serve as a
stable ORR catalyst for direct methanol fuel cells.