Owing to the tunable structure and component, Prussian
blue analogues
(PBAs) and their derivatives have attracted great interest for a variety
of applications, especially oxygen evolution reaction (OER). Herein,
PBA-derived FeP-CoP nanocubes dispersed on Ti3C2T
x
MXene have been fabricated by in situ
coprecipitation and subsequent phosphorization process. We found that
Ti3C2T
x
MXene reduced
the size of FeP-CoP nanocubes leading to more active sites, and the
strong coupling interaction between FeP-CoP and Ti3C2T
x
MXene resulted in higher intrinsic
activities and faster charge transfer kinetics. Thus, the optimized
FeP-CoP/Ti3C2T
x
-5
delivers a low overpotential of 270 mV to drive 10 mA cm–2 and a small Tafel slope of 49.1 mV dec–1 in 1.0
M KOH. This study provides an efficient strategy to prepare metal
phosphides and MXene hybrids with unique structures for electrocatalytic
water splitting.