Cooperative catalytically active sites for methanol activation by single metal ion-doped H-ZSM-5

Abstract

Catalytic conversion of methanol to aromatics and hydrocarbons is regarded as a key alternative technology to oil processing. Although the inclusion of foreign metal species in H-ZSM-5 containing Brønsted acid...

Second-Sphere Lattice Effects in Copper and Iron Zeolite Catalysis

“…Techniques like synchrotron PXRD, NPD, IR, and XAS could help in identifying FLPs and their mechanistic importance in reactions where their relevance may have been overlooked. 148,150 8. CONCLUDING COMMENTS In this review, we have focused on the parallels between metallozeolites and metalloenzymes with respect to secondsphere effects that can enable and control catalysis.…”

“…FLPs were also formed, defect-free, on transition-metal ion (Fe, Zn and Ag) exchanged H-ZSM-5. In these materials, FLPs were used to activate small molecules such as CH 3 OH and convert them to other commodity chemicals like aromatics and longer hydrocarbons . Homogeneous dispersion of the metal ions was confirmed with EXAFS and high-angle annular dark-field scanning transmission electron microscopy.…”

Switching between classical/nonclassical crystallization pathways of TS-1 zeolite: implication on titanium distribution and catalysis

“…Zeolites are a class of crystalline microporous materials, characterized by well-defined micropore architectures, and have brought breakthrough innovations in heterogeneous catalysis. 1–9 The diameter and nature of pores and cavities give rise to the unique shape selectivity of zeolites, e.g. , by limiting the diffusion of substrates into and out of zeolites based on their molecular size, or by stabilizing transition states.…”

Improving hydrogen production for carbon-nitride-based materials: crystallinity, cyanimide groups and alkali metals in solution working synergistically

“…6–12 However, the recently developed carbon nitride materials synthesized in the presence of an inorganic salt, such as NaCl, 13 KCl and LiCl, give highly crystalline photocatalysts with enhanced efficiency in the HER. 14–20…”