2026-04-18T06:03:40Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/3597552024-12-20T18:59:13Zcom_2072_300912com_2072_4427col_2072_301309

00925njm 22002777a 4500 dc Hegner, Franziska Simone author Herraiz-Cardona, Isaac author Cardenas-Morcoso, Drialys author López, Núria author Galán-Mascarós, José-Ramón author Gimenez, Sixto author 2017-10-04 The efficient integration of photoactive and catalytic materials is key to promoting photoelectrochemical water splitting as a sustainable energy technology built on solar power. Here, we report highly stable water splitting photoanodes from BiVO4 photoactive cores decorated with CoFe Prussian blue-type electrocatalysts (CoFe-PB). This combination decreases the onset potential of BiVO4 by ∼0.8 V (down to 0.3 V vs reversible hydrogen electrode (RHE)) and increases the photovoltage by 0.45 V. The presence of the catalyst also leads to a remarkable 6-fold enhancement of the photocurrent at 1.23 V versus RHE, while keeping the light-harvesting ability of BiVO4. Structural and mechanistic studies indicate that CoFe-PB effectively acts as a true catalyst on BiVO4. This mechanism, stemming from the adequate alignment of the energy levels, as showed by density functional theory calculations, allows CoFe-PB to outperform all previous catalyst/BiVO4 junctions and, in addition, leads to noteworthy longterm stability. A bare 10−15% decrease in photocurrent was observed after more than 50 h of operation under light irradiation http://hdl.handle.net/2072/359755 https://doi.org/10.1021/acsami.7b09449 Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting