One-atom-thick hexagonal boron nitride co-catalyst for enhanced oxygen evolution reactions.

ABSTRACT: Developing efficient (co-)catalysts with optimized interfacial mass and charge transport properties is essential for enhanced oxygen evolution reaction (OER) via electrochemical water splitting. Here we report one-atom-thick hexagonal boron nitride (hBN) as an attractive co-catalyst with enhanced OER efficiency. Various electrocatalytic electrodes are encapsulated with centimeter-sized hBN films which are dense and impermeable so that only the hBN surfaces are directly exposed to reactive species. For example, hBN covered Ni-Fe (oxy)hydroxide anodes show an ultralow Tafel slope of ~30 mV dec^-1 with improved reaction current by about 10 times, reaching ~2000 mA cm^-2 (at an overpotential of ~490 mV) for over 150 h. The mass activity of hBN co-catalyst is found exceeding

SUBMITTER: Lu Y 

PROVIDER: S-EPMC10618520 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature