Colloidal Synthesis of Nickel Arsenide Nanocrystals for Electrochemical Water Splitting.

ABSTRACT: We report a detailed study on the first colloidal synthesis of NiAs nanocrystals. By optimizing the synthesis parameters, we were able to obtain trioctylphosphine-capped NiAs nanoplatelets with an average diameter of ∼10 nm and a thickness of ca. 4 nm. We then studied the performance of such NiAs nanocrystals as electrocatalysts for electrochemical water splitting reactions, namely, acidic hydrogen evolution reaction (HER) and alkaline oxygen evolution reaction (OER). These nanocrystals were found to be the most HER active ones among the transition metal arsenides reported to date despite exhibiting less than 40 h of stability under benchmark operative conditions (i.e., -10 mA cm_geo ^-2). When tested as alkaline OER electrocatalysts, our NiAs nanocrystals behave

SUBMITTER: Bellato F 

PROVIDER: S-EPMC9832430 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature