| Autor: |
Naya SI; Environmental Research Laboratory, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan. shinichi.naya@itp.kindai.ac.jp., Nagamitsu M; Graduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan., Sugime H; Graduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.; Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Oaka, Osaka 577-8502, Japan., Soejima T; Graduate School of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.; Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1, Kowakae, Higashi-Oaka, Osaka 577-8502, Japan., Tada H; Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan. htada0409@gmail.com. |
| Abstrakt: |
Hydrogen production by proton exchange membrane water electrolysis requires an anode with low overpotential for oxygen evolution reaction (OER) and robustness in acidic solution. While exploring new electrode materials to improve the performance and durability, optimizing the morphology of typical materials using new methods is a big challenge in materials science. RuO 2 is one of the most active and stable electrocatalysts, but further improvement in its performance and cost reduction must be achieved for practical use. Herein, we present a novel technology, named "metal oxide plating", which can provide maximum performances with minimum amount. A uniform single-crystal RuO 2 film with thickness of ∼2.5 nm was synthesized by a solvothermal-post heating method at an amount ( x ) of only 18 μg cm -2 (ST-RuO 2 (18)//TiO 2 NWA). OER stably proceeds on ST-RuO 2 (18)//TiO 2 NWA with ∼100% efficiency to provide a mass-specific activity (MSA) of 341 A g cat -1 at 1.50 V ( vs. RHE), exceeding the values for most of the state-of-the-art RuO 2 electrodes. |
