Fig. 4: Comparison of PbS-QD-based photoelectrodes. | Nature Communications

Fig. 4: Comparison of PbS-QD-based photoelectrodes.

From: Stable and efficient PbS quantum dot photoelectrodes enable photoelectrochemical hydrogen production without sacrificial agents

Fig. 4: Comparison of PbS-QD-based photoelectrodes.

a Chemical stability of the Ni/FM/PbS-QD photoanode, shown by linear sweep voltammetry (LSV) scans every 24 h over five consecutive days. The device was stored in 1.0 M sodium hydroxide (NaOH) in the dark and measured under visible-light illumination (λ ≥ 420 nm) at each time point. b Long-term stability test of the Ni/FM/PbS-QD photoanode for 24 h under visible-light illumination (λ ≥ 420 nm). c Normalized photocurrent density–time (Jph–t) curves of the Ni/FM/PbS-QD photoanode with and without S2–/SO32– as a sacrificial agent, measured under visible-light illumination (λ ≥ 420 nm) and one-sun illumination (AM 1.5 G, 100 mW cm−2). d Schematic illustration of the Ni/FM/PbS-QD photoanode and Pt-Ti/FM/PbS-QD photocathode. e LSV curve of Pt-Ti/FM/PbS-QD photocathode under one-sun illumination (AM 1.5 G, 100 mW cm−2). f Time-resolved H2 and O2 production, along with the corresponding H2/O2 molar ratio indicated by the yellow arrow (right y axis, blue), from the Pt-Ti/FM/PbS-QD photocathode. Error bars represent the standard deviation from five independent measurements. g Long-term stability test of Pt-Ti/FM/PbS-QD photocathode for 24 h under one-sun illumination (AM 1.5 G, 100 mW cm−2). h Ultraviolet–visible (UV–vis) spectra and i, incident photon-to-current efficiency (IPCE) data before and after long-term stability test for Pt-Ti/FM/PbS-QD photocathode.

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