Photoelectrochemical (PEC) cells using semiconductor electrodes can efficiently absorb solar energy and perform chemical reactions,which are considered as a very attractive strategy to produce renewable,sustainable,and clean hydrogen energy.Antimony selenide (Sb2Se3) has been widely investigated for constructing PEC involved photocathodes benefitting of its low cost,low toxicity,suitable band gap,superior optoelectronic properties,and outstanding photo-corrosion stability.Since the first Sb2Se3 photocathode for PEC water splitting reported by Moons group in 2017,extensive research with various architectures and engineering efforts (i.e.,absorber engineering,interfaces engineering,co-catalyst engineering and tandem engineering) has been focused on this interesting scenario.During a very short period,it achieved a rapid development in terms ofphotocurrent from 2 mA cm-2 to 30 mA cm-2,a record Half-cell solar-to-hydrogen conversion efficiency (ηSTH) of 3.8%and a record ηSTH exceeding 10%.It undoubtedly demonstrates that Sb2Se3 and some analogous chalcogenide semiconductors possess great application potential in clean hydrogen production via PEC water splitting.