Fabrication of BiVO4 photoanode cocatalyzed with NiCo-layered double hydroxide for enhanced photoactivity of water oxidation

Chelation-mediated in-situ formation of ultrathin cobalt (oxy)hydroxides on hematite photoanode towards enhanced photoelectrochemical water oxidation

“…In the past few decades, various OER catalysts including Co-Pi complexes [13], transition metals (Co, Fe and Ni) oxides or (oxy) hydroxides [14][15][16] and transition metal-layered double hydrox-ides (LDHs) [17][18][19][20][21] have been employed to promote PEC performance of various semiconductor photoanodes. These findings have intuitively demonstrated the vital roles of OER catalysts as cocatalysts on the reduced onset potential and improved photocurrent density of photoanodes.…”

Remarkable synergy of borate and interfacial hole transporter on BiVO4 photoanodes for photoelectrochemical water oxidation

“…35 Subsequently, a diluted suspension of NiFeV LDH was dropcasted onto the surface of B-BiVO 4 electrode, instead of the in-situ hydrothermal/solvothermal growth 30, 50-52 and electrodeposition. [53][54][55] In the abovementioned two methods, LDHs either grow homogenously in-situ and completely cover the surface of BiVO 4 as oriented nanosheets or form a layer wrapped around the BiVO 4 particles. However, BiVO 4 is sensitive to the pH of electroplating solution and the applied potential during electrolysis; [56][57][58] and the relatively high temperature of the hydrothermal process might cause detrimental surface etching on BiVO 4 .…”

Core–Shell Photoanodes for Photoelectrochemical Water Oxidation

“…coupled BiVO 4 photoanode with NiCo‐LDH (Figure 5c), which resulted in large enhancement of carrier separation efficiency and a threefold increase of current density. [ 53 ] NiFeOOH overlayer was also formed on Fe 2 O 3 nanorods via a simple electroless ligand‐regulated oxidation method (Figure 5d). [ 54 ] The OER onset potential of Fe 2 O 3 @ NiFeOOH(≈0.73 V RHE ) exhibited a cathodic shift from that of Fe 2 O 3 (≈0.93 V RHE ).…”