电催化剂
析氧
阳极
材料科学
碘化物
化学工程
原子层沉积
电化学
无机化学
催化作用
阴极
制氢
电解
分解水
电极
化学
图层(电子)
纳米技术
物理化学
光催化
工程类
生物化学
电解质
作者
Young Sun Park,Gyumin Jang,Inkyu Sohn,Hyungsoo Lee,Jeiwan Tan,Juwon Yun,Sunihl Ma,Jeongyoub Lee,Chan Uk Lee,Subin Moon,Hayoung Im,Seung-min Chung,Seungho Yu,Hyungjun Kim,Jooho Moon
摘要
Abstract Oxygen evolution reaction (OER) as a half‐anodic reaction of water splitting hinders the overall reaction efficiency owing to its thermodynamic and kinetic limitations. Iodide oxidation reaction (IOR) with low thermodynamic barrier and rapid reaction kinetics is a promising alternative to the OER. Herein, we present a molybdenum disulfide (MoS 2 ) electrocatalyst for a high‐efficiency and remarkably durable anode enabling IOR. MoS 2 nanosheets deposited on a porous carbon paper via atomic layer deposition show an IOR current density of 10 mA cm –2 at an anodic potential of 0.63 V with respect to the reversible hydrogen electrode owing to the porous substrate as well as the intrinsic iodide oxidation capability of MoS 2 as confirmed by theoretical calculations. The lower positive potential applied to the MoS 2 ‐based heterostructure during IOR electrocatalysis prevents deterioration of the active sites on MoS 2 , resulting in exceptional durability of 200 h. Subsequently, we fabricate a two‐electrode system comprising a MoS 2 anode for IOR combined with a commercial Pt@C catalyst cathode for hydrogen evolution reaction. Moreover, the photovoltaic–electrochemical hydrogen production device comprising this electrolyzer and a single perovskite photovoltaic cell shows a record‐high current density of 21 mA cm –2 at 1 sun under unbiased conditions.
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