Revealing the pH-Universal Electrocatalytic Activity of Co-Doped RuO2 toward the Water Oxidation Reaction

• DOI: 10.1021/acsami.1c20752
• Publication Date: 2021-12-24T12:13:38Z
• Authors: Ragunath Madhu; Arun Karmakar; Sangeetha Kumaravel; Selvasundarasekar...; Krishnendu Bera; Sreenivasan Nagappan; Hariharan N. Dhan...; Subrata Kundu
• Keywords: Oxygen evolution; Overpotential; Electrolysis of water

Electrocatalytic water splitting has gained vast attention in recent decades for its role catalyzing hydrogen production effectively as an alternative to fossil fuels. Moreover, the designing of highly efficient oxygen evolution reaction (OER) electrocatalysts across universal pH conditions was more challengeable harsh anodic potentials, it questions activity and stability concerned catalyst. Generally, geometrical engineering electronic structural modulation catalyst can boost OER activity. Herein, a Co-doped RuO2 nanorod material is developed used electrocatalyst at different conditions. Co-RuO2 exhibits lower overpotential value 238 mV alkaline environment (1 M KOH) with Tafel slope 48 mV/dec. On other hand, acidic, neutral, near-neutral environments, required overpotentials 328, 453, 470 mV, respectively, attain 10 mA/cm2 current density. It observed that doping Co into could synergistically increase active sites enhanced electrophilic nature Ru4+ accelerate all ranges. This study finds applicability earth-abundant-based metals like be simple technique. Further, assured stable electrolytes needs further explored future.