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

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons39194

Huang,  Xing
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22243

Willinger,  Marc Georg
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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c7ta03628k.pdf
(Verlagsversion), 2MB

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Zitation

Wang, J., Xie, Y., Yao, Y., Huang, X., Willinger, M. G., & Shao, L. (2017). Ni/NiO nanoparticles on a phosphorous oxide/graphene hybrid for efficient electrocatalytic water splitting. Journal of Materials Chemistry A, 5(28), 14758-14762. doi: 10.1039/C7TA03628K.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002D-CDA4-2
Zusammenfassung
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@HGPxOy 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 HGPx>Oy and Ni/NiO nanohybrids contribute to the improved electrocatalytic performance.