TiOx/Pd interfacial catalysts with controllable geometrical/electronic effects for industrial H2O2 production

Aiming at controllable modulating metal-support interactions to achieve an optimal trade-off of geometric/electronic effect in supported catalysts, we developed a reliable approach based on the typical 2D material layered double hydroxide (LDHs). A series of TiOx/Pd/MgTiAl-MMO-X catalysts with adjustable interfacial effect were acquired by loading PdCl42- precursor and further preciously adjusting the topological reduction temperature, based on the regulatory effect of Mg-O-Ti-O-Al-O structure in the support on the reducibility and mobility of Ti4+. The catalysts with semi-continuous and accessible TiOx/Pd interface, confirmed by AC-HAADF-STEM, CO chemisorption, XPS, exhibit much higher H2O2 yield than the catalyst with over-encapsulation structure. The TiOx/Pd/MgTiAl-MMO-450 catalysts possessed optimal geometric and electronic structure exhibited the highest activity with TOF of 9.75 s(-1), excellent H2O2 yield of 11.4 g/L, as well as good stability.