11:45 〜 12:00
▼ [10a-W521-11] Evaluation of IrO2 Activity as an Electrocatalyst for Oxygen Evolution Reaction by Heteroatom doped Reduced Graphene Oxide
キーワード：Oxygen Evolution Reaction, Iridium oxide, Reduced graphene oxide
Water splitting in water electrolyzers is an efficient way to produce hydrogen as a source of energy. However, the phenomenon is limited by the anodic oxygen evolution reaction (OER) in water electrolyzers. OER is a complex reaction with high over-potential and slow kinetics that requires precious metal oxide nanoparticles (nps) such as iridium oxide (IrO2) with low natural abundance as catalysts. Hence, improving the active surface area and modifying the electronic structure of the catalyst becomes a necessary solution. In this regard, in the present work, heteroatom (B)-doped graphene oxide is chosen to the support for IrO2 nps to alter their electronic states and improve the overall catalytic performance.
The B-doped catalyst is synthesized via pyrolysis in N2 atmosphere, followed by loading of IrO2 on B-rGO via hydrothermal method using H2IrCl6 as the precursor. The catalyst is further characterized by various analytical techniques, and electrochemically tested for its activity by cyclic voltammetry and linear sweep voltammetry.
The B-doped catalyst is synthesized via pyrolysis in N2 atmosphere, followed by loading of IrO2 on B-rGO via hydrothermal method using H2IrCl6 as the precursor. The catalyst is further characterized by various analytical techniques, and electrochemically tested for its activity by cyclic voltammetry and linear sweep voltammetry.