Scalable Two-Step Synthesis of Nickel–Iron Phosphide Electrodes for Stable and Efficient Electrocatalytic Hydrogen Evolution. Kwong, W. L., Lee, C. C., & Messinger, J. The Journal of Physical Chemistry C, 121(1):284–292, January, 2017. Publisher: American Chemical Society![Scalable Two-Step Synthesis of Nickel–Iron Phosphide Electrodes for Stable and Efficient Electrocatalytic Hydrogen Evolution [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex The development of efficient, durable, and inexpensive hydrogen evolution electrodes remains a key challenge for realizing a sustainable H2 fuel production via electrocatalytic water splitting. Herein, nickel–iron phosphide porous films with precisely controlled metal content were synthesized on Ti foil using a simple and scalable two-step strategy of spray-pyrolysis deposition followed by low-temperature phosphidation. The nickel–iron phosphide of an optimized Ni:Fe ratio of 1:4 demonstrated excellent overall catalytic activity for hydrogen evolution reaction (HER) in 0.5 M H2SO4, achieving current densities of −10 and −30 mA cm–2 at overpotentials of 101 and 123 mV, respectively, with a Tafel slope of 43 mV dec–1. Detailed analysis obtained by X-ray diffraction, electron microscopy, electrochemistry, and X-ray photoelectron spectroscopy revealed that the superior overall HER activity of nickel–iron phosphide as compared to nickel phosphide and iron phosphide was a combined effect of differences in the morphology (real surface area) and the intrinsic catalytic properties (electronic structure). Together with a long-term stability and a near-100% Faradaic efficiency, the nickel–iron phosphide electrodes produced in this study provide blueprints for large-scale H2 production.
@article{kwong_scalable_2017,
title = {Scalable {Two}-{Step} {Synthesis} of {Nickel}–{Iron} {Phosphide} {Electrodes} for {Stable} and {Efficient} {Electrocatalytic} {Hydrogen} {Evolution}},
volume = {121},
issn = {1932-7447},
url = {https://doi.org/10.1021/acs.jpcc.6b09050},
doi = {10.1021/acs.jpcc.6b09050},
abstract = {The development of efficient, durable, and inexpensive hydrogen evolution electrodes remains a key challenge for realizing a sustainable H2 fuel production via electrocatalytic water splitting. Herein, nickel–iron phosphide porous films with precisely controlled metal content were synthesized on Ti foil using a simple and scalable two-step strategy of spray-pyrolysis deposition followed by low-temperature phosphidation. The nickel–iron phosphide of an optimized Ni:Fe ratio of 1:4 demonstrated excellent overall catalytic activity for hydrogen evolution reaction (HER) in 0.5 M H2SO4, achieving current densities of −10 and −30 mA cm–2 at overpotentials of 101 and 123 mV, respectively, with a Tafel slope of 43 mV dec–1. Detailed analysis obtained by X-ray diffraction, electron microscopy, electrochemistry, and X-ray photoelectron spectroscopy revealed that the superior overall HER activity of nickel–iron phosphide as compared to nickel phosphide and iron phosphide was a combined effect of differences in the morphology (real surface area) and the intrinsic catalytic properties (electronic structure). Together with a long-term stability and a near-100\% Faradaic efficiency, the nickel–iron phosphide electrodes produced in this study provide blueprints for large-scale H2 production.},
number = {1},
urldate = {2024-12-10},
journal = {The Journal of Physical Chemistry C},
author = {Kwong, Wai Ling and Lee, Cheng Choo and Messinger, Johannes},
month = jan,
year = {2017},
note = {Publisher: American Chemical Society},
pages = {284--292},
}
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The nickel–iron phosphide of an optimized Ni:Fe ratio of 1:4 demonstrated excellent overall catalytic activity for hydrogen evolution reaction (HER) in 0.5 M H2SO4, achieving current densities of −10 and −30 mA cm–2 at overpotentials of 101 and 123 mV, respectively, with a Tafel slope of 43 mV dec–1. Detailed analysis obtained by X-ray diffraction, electron microscopy, electrochemistry, and X-ray photoelectron spectroscopy revealed that the superior overall HER activity of nickel–iron phosphide as compared to nickel phosphide and iron phosphide was a combined effect of differences in the morphology (real surface area) and the intrinsic catalytic properties (electronic structure). 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