Cationic Vacancy Defects in Iron Phosphide: A Promising Route toward Efficient and Stable Hydrogen Evolution by Electrochemical Water Splitting.

ABSTRACT: Engineering the electronic properties of transition metal phosphides has shown great effectiveness in improving their intrinsic catalytic activity for the hydrogen evolution reaction (HER) in water splitting applications. Herein, we report for the first time, the creation of Fe vacancies as an approach to modulate the electronic structure of iron phosphide (FeP). The Fe vacancies were produced by chemical leaching of Mg that was introduced into FeP as "sacrificial dopant". The obtained Fevacancy-rich FeP nanoparticulate films, which were deposited on Ti foil, show excellent HER activity compared to pristine FeP and Mg-doped FeP, achieving a current density of 10 mA cm^-2 at overpotentials of 108 mV in 1 m KOH and 65 mV in 0.5 m H₂ SO₄ , with a near-100 % Far

SUBMITTER: Kwong WL 

PROVIDER: S-EPMC5725677 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature