Ni/NiO nanoparticles on a phosphorous oxide/graphene hybrid for efficient electrocatalytic water splitting

作者：Wang, Juan; Xie, Yanan; Yao, Yuanying; Huang, Xing; Willinger, Marc; Shao, Lidong^*

来源：Journal of Materials Chemistry A, 2017, 5(28): 14758-14762.

DOI：10.1039/c7ta03628k

• GRAPHENE
• REDUCTION
• CATALYST
• COMPOSITES
• OXIDATION
• ELECTRODE
• NITROGEN
• CARBONS
• NICKEL
• OXIDE

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.

• 出版日期2017-7-28
• 单位上海电力大学