Key points are not available for this paper at this time.
Abstract Engineering the nanostructures and compositions of 2D layered metal thiophosphates (MTPs) is significant for extending their applications. Here, a scalable and flexible strategy is presented to prepare single crystalline CoNiPS 3 incorporated with N‐doped carbon (CoNiPS 3 /C) nanosheets (≈16 nm thickness), which can be further processed into the mosaic‐structured CoNiPS 3 /C nanosheets (≈6 nm thickness) composed of randomly distributed crystalline nanodomains (≈15 nm diameter) and disordered boundaries (denoted as mosaic CoNiPS 3 /C nanosheets), and further into separated CoNiPS 3 /C nanodots (≈4 nm diameter). The initial CoNiPS 3 /C nanosheeets are prepared by using Co–Ni Prussian‐blue analogue nanoplates as templating precursors. As compared to the initial CoNiPS 3 /C nanosheets and nanodots, the mosaic CoNiPS 3 /C nanosheets exhibit plenty of active edge sites, retained crystallinity, and good structural stability. Synergistically, density functional theory calculations reveal that the bimetallic composition results in higher intrinsic activity, better conductivity, and lower kinetic energy barriers for bifunctional oxygen/hydrogen evolution reactions. More importantly, a water‐splitting electrolyzer constructed using the mosaic CoNiPS 3 /C nanosheets as both cathode and anode achieves 30 mA cm −2 at 1.62 V, which is better than the initial CoNiPS 3 /C nanosheets (1.69 V) and is comparable to the discreted nanodots (1.58 V). Besides, the mosaic CoNiPS 3 /C nanosheets show much better electrocatalytic stability than nanodots.
Liang et al. (Thu,) studied this question.