Mn−O Covalency Governs the Intrinsic Activity of Co‐Mn Spinel Oxides for Boosted Peroxymonosulfate Activation
University of Science and Technology of China · Joint Research Center · +2 more institutions
Abstract
Abstract Transition metal (TM)‐based bimetallic spinel oxides can efficiently activate peroxymonosulfate (PMS) presumably attributed to enhanced electron transfer between TMs, but the existing model cannot fully explain the efficient TM redox cycling. Here, we discover a critical role of TM−O covalency in governing the intrinsic catalytic activity of Co 3− x Mn x O 4 spinel oxides. Experimental and theoretical analysis reveals that the Co sites significantly raises the Mn valence and enlarges Mn−O covalency in octahedral configuration, thereby lowering the charge transfer energy to favor Mn Oh –PMS interaction. With appropriate Mn IV /Mn III ratio to balance PMS adsorption and Mn IV reduction, the Co 1.1 Mn…
Citation impact
- FWCI
- 24.34
- Percentile
- 100%
- References
- 44
Authors
7- ZGZhiyan Guo
University of Science and Technology of China, Joint Research Center
- CLChen‐Xuan Li
University of Science and Technology of China, Joint Research Center
- MGMiao Gao
University of Science and Technology of China, Joint Research Center
- XHXiao Han
University of Science and Technology of China
- YZYingjie Zhang
University of Science and Technology of China
Topics & keywords
- Spinel
- Bimetallic strip
- Valence (chemistry)
- Catalysis
- Chemistry
- Oxide
- Metal
- Redox
- Affordable and clean energy