Hollow NiCo2Se4 microspheres composed of nanoparticles as multifunctional electrocatalysts for unassisted artificial photosynthesis

Hollow NiCo2Se4 microspheres assembled with nanoparticles are synthesized using a sacrificial template and applied as the electrocatalyst of an unassisted artificial photosynthesis device. Three single QSSDSSCs connected in series under 1-sun irradiation can drive an overall water-splitting cell with solar-to-hydrogen efficiency of 5.18%.269