“…1 The direct dehydrogenation (DDH) of ethylbenzene (EB) to styrene catalyzed by Fe-based catalysts has long been utilized in industrial manufacturing since 1938. 2,3 However, to avoid the rapid coking, excessive superheated steam is inevitably co-fed with ethylbenzene, resulting in both huge energy-consumption and environmental burden, such as wastewater and heavy metal pollution. Therefore, developing novel energy-saving and environment-friendly catalysts is the long-term pursuit of global researchers.…”