Coupling Nano and Atomic Electric Field Confinement for Robust Alkaline Oxygen Evolution

Wang, Qiyou; Gong, Yujie; Zi, Xin; Gan, Lei; Pensa, Evangelina; Liu, Yuxiang; Xiao, Yusen; Li, Hongmei; Liu, Kang; Fu, Junwei; Liu, Jun; Stefancu, Andrei; Cai, Chao; Chen, Shanyong; Zhang, Shiguo; Lu, Ying‐Rui; Chan, Ting‐Shan; Ma, Chao; Cao, Xueying; Cortés, Emiliano und Liu, Min (2024): Coupling Nano and Atomic Electric Field Confinement for Robust Alkaline Oxygen Evolution. In: Angewandte Chemie International Edition, Bd. 63, Nr. 28

Abstract

The alkaline oxygen evolution reaction (OER) is a promising avenue for producing clean fuels and storing intermittent energy. However, challenges such as excessive OH− consumption and strong adsorption of oxygen-containing intermediates hinder the development of alkaline OER. In this study, we propose a cooperative strategy by leveraging both nano-scale and atomically local electric fields for alkaline OER, demonstrated through the synthesis of Mn single atom doped CoP nanoneedles (Mn SA-CoP NNs). Finite element method simulations and density functional theory calculations predict that the nano-scale local electric field enriches OH− around the catalyst surface, while the atomically local electric field improves *O desorption. Experimental validation using in situ attenuated total reflection infrared and Raman spectroscopy confirms the effectiveness of the nano-scale and atomically electric fields. Mn SA-CoP NNs exhibit an ultra-low overpotential of 189 mV at 10 mA cm−2 and stable operation over 100 hours at ~100 mA cm−2 during alkaline OER. This innovative strategy provides new insights for enhancing catalyst performance in energy conversion reactions.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik > Theoretische Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 1433-7851
• Sprache: Englisch
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390776260