Ni/NiO nanoparticles on a phosphorous oxide/graphene hybrid for efficient electrocatalytic water splitting. Issue 28 (5th July 2017)

• Record Type: Journal Article
• Authors: Wang, Juan; Xie, Yanan; Yao, Yuanying; Huang, Xing; Willinger, Marc; Shao, Lidong
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 28(2017)
• Page Start: 14758
• Page End: 14762
• Publication Date: 2017-07-05
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta03628k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Ni/NiO nanoparticles on phosphorus oxide-incorporated holey graphene sheets showed efficient catalytic activity and stability for hydrogen evolution reaction. Abstract : Herein, Ni/NiO nanoparticles were anchored on phosphorous oxide/graphene for electrocatalytic water splitting. The organophosphate units in graphene nanosheets may facilitate the preferred formation of a surface oxide-modified nickel species with stable reduced electron density at the Fermi level. Efficient catalytic activity and stability in a hydrogen evolution reaction (HER) were obtained. Ni/NiO@HGP x O y with a low nickel loading shows an overpotential of 205 mV at a current density of 10 mA cm −2 and a Tafel slope of 80 mV dec −1, whereas those of its undoped counterpart are 278 mV and 117 mV dec −1, respectively. We proposed that the small particle size, uniform dispersion of Ni/NiO nanoparticles, and electronic effect arising from the interactions between HGP x O y and Ni/NiO nanohybrids contribute to the improved electrocatalytic performance.