“The characterization and DFT results both revealed that the doped potassium contributes to regulating the vanadium species in the oligomeric state.”
“The different loaded potassium leads to variation in sulfidation degree, affecting the properties of vanadium species and acid properties consequently.”
“The synergy between vanadium species and acid properties was regulated by the added potassium simultaneously, and thus the DH performance was enhanced.”
“We attribute such high isobutene yield to the precise modulation of polymerization degree for vanadium species via doping of potassium and indicating that the synergy between vanadium species and acid sites is critical to enhance the DH performance.”