Yun, Juwon Park, Young Sun Lee, Hyungsoo Jeong, Wooyong Jeong, Chang-Seop Lee, Chan Uk Lee, Jeongyoub Moon, Subin Kwon, Eunji Lee, Soobin Kim, Sumin Kim, Junhwan Yu, Seungho Moon, Jooho 2024-06-07T05:30:30Z 2024-06-07T05:30:30Z 2024-06-07 2024-08 1614-6832 https://pubs.kist.re.kr/handle/201004/150030 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. English Wiley-VCH Verlag Efficient and Ultrastable Iodide Oxidation Reaction Over Defect-Passivated Perovskite Photoanode for Unassisted Solar Fuel Production Article 10.1002/aenm.202401055 1 Advanced Energy Materials, v.14, no.32 Advanced Energy Materials 14 32 Y scie scopus 001231729600001 2-s2.0-85194493189 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article CELLS interface engineering iodide oxidation perovskite photoanode unbiased hydrogen production