AUTHOR=Editorial Office Frontiers TITLE=Retraction: Effect of bimetal element doping on the low-temperature activity of manganese-based catalysts for NH3-SCR JOURNAL=Frontiers in Chemistry VOLUME=11 YEAR=2023 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2023.1208136 DOI=10.3389/fchem.2023.1208136 ISSN=2296-2646