ScholarWorks@Y-Scholar Hub

초록

Recently, lead halide perovskites have emerged as promising photoanode materials for efficient hydrogen production. However, the sluggish kinetics of the oxygen evolution reaction (OER) and interfacial defect-mediated charge accumulation inevitably result in efficiency loss and degradation of perovskite photoanodes. Herein, a defect-passivated electron transport layer-based perovskite photoanode combined with a catalyst layer favorable is introduced for iodide oxidation reaction bearing a small thermodynamic barrier and rapid kinetics compared to OER for efficient solar fuel generation. The resulting perovskite photoanode revealed a saturated photocurrent density of 22.4 mA cm-2 at 0.3 V versus the reversible hydrogen electrode (VRHE) with an impressive onset potential of -0.2 VRHE as well as durability for 225 h in a neutral electrolyte. In addition, an unbiased hydrogen-production device comprising a perovskite photoanode and Pt coil electrocatalyst is demonstrated, achieving a remarkable solar-to-chemical conversion efficiency of 11.45% and stable operation for 25 h. Moreover, a wireless artificial leaf-structured device realizing solar-driven hydrogen generation in natural sea water under outdoor sunlight is presented.,The introduction of 4-methoxyphenethyl-amine at the PSK/SnO2 interface, combined with IOR and Co-Ni3S2 catalyst on the perovskite photoanode, demonstrates the remarkable onset potential of -0.2 VRHE and stability of 225 h, maintaining approximate to 90% of the initial photocurrent density. The efficient unbiased hydrogen production is successfully achieved with a simple PEC-EC configuration with a high SCC efficiency of 11.45% and long-term stability of 25 h. image,