Single Crystal, Cuprous Oxide Nanowire Arrays for Highly Stable Photocathodic Water Splitting
Here, we investigate the photoelectrochemical (PEC) properties and stability of dense (108 cm-1) single crystalline Cu2O nanowire (NW) arrays grown by a combination of thermal and carbo-thermal reduction method from pristine copper foils (Fig 1a-d). Our data shows that single crystalline Cu2O NW arrays, show good photoresponse (Fig 1e) and higher stability as compared to thin film Cu2O (Fig 1f,g).
We will present structural investigation of the Cu2O NWs using SEM, HRTEM and Raman spectroscopy (Fig. 1a-d). Photoelectrochemical activity of Cu2O NW arrays for water splitting will be reported and stability towards photocorrosion will be tested with extended and accelerated reliability tests.