A mini review on construction strategies of novel metal-based catalysts with dual reaction centers (DRCs) employed in advanced oxidation processes (AOPs)

Background: Considerable attention has been directed towards advanced oxidation processes (AOPs) due to their high adaptability and efficiency in degrading recalcitrant organic compounds. Metal-based catalysts have attracted significant interest among the various materials considered due to their chemical stability, catalytic activity, and cost-effectiveness. One promising approach includes the creation of dual reaction centers (DRCs) with uneven electron distribution on the catalyst surface to address the issue of slow conversion rates from ---Me(n+1)+ to ---Men+. Methods: Leveraging the Web of Science database and Citespace software to analyze research trends and frontiers. Subsequently, focus on the strategy of constructing Fe-based, Cu-based, and other metal-based catalysts with DRCs. Significant Findings: Strategies such as doping different electronegative elements (Me-O-Me) and forming surface complexes with metal and pi-conjugated carbon-based materials (Me-O-C) to induce electron-rich/electron-poor microregions can effectively construct metal-based DRC catalysts. Notable are the innovative methods that involve using short C-Me (Me=Fe, Co, and Mo) bond bridges as electron transport channels and successfully converting chicken manure (CM) into DRC catalyst supplies. In summary, this work offers insights into designing more efficient DRC catalysts for use in AOPs.