Fig. 4: Overall bias-free PEC H2 production. | Nature Communications

Fig. 4: Overall bias-free PEC H2 production.

From: Coupling furfural oxidation for bias-free hydrogen production using crystalline silicon photoelectrodes

Fig. 4

a LSV curves of furfural oxidation with HER, OER with HER using the PtC/Ni/c-Si photocathode, and LSV curves of OER with HER using the modularized PtC/Ni/c-Si photocathode in the two-electrode configuration. b Chronoamperometry of dual H2 production using the PtC/Ni/c-Si photocathode at 0 V. c Produced H2 and its Faradaic efficiency for dual H2 production. d Mass spectra of collected gas from anode and cathode sides during the bias-free C6H5–CDO oxidation and HER. e H2 production rate comparison with previously reported bias-free PEC H2 production system. Biomass: Biomass oxidation reaction, IOR: iodide oxidation reaction, Dual photoelectrode (Photoanode║Photocathode). The experiments were conducted in 1 M NaOH with (for dual H2 production) and without 50 mM furfural (for water splitting) in the two-electrode configuration under AM 1.5 G illumination. The error bars indicate the standard deviation based on three independent measurements. Source data are provided as a Source Data file.

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