Mechanically Transformed ZIF-67 Phases as Catalytically Active Nanomaterials for Ammonia Borane Hydrolysis
Source abstract
Abstract
Zeolitic imidazole frameworks (ZIFs) with tailored open metal sites hold great promise for catalysis. Ball milling of sodalite (SOD) ZIF-67 transformed a stable framework into metastable kat and dia ZIF-67 phases. These metastable phases showed catalytic activity for ammonia borane (AB) hydrolysis, transforming into a nano sheet-like cobalt–imidazolate catalyst ( nano Co-Im Cat, dimensions of 40–110 nm), featuring broken Co–N bonds and exposed Lewis acidic (Co 3+ /Co 2+ ) and basic (N) sites as a consequence of structural opening. The catalyst exhibited good activity; 3 equiv of H 2 was released within 2 min with an activation energy of 45.48 ± 0.97 kJ/mol, whereas pristine SOD ZIF-67 showed no detectable activity under identical conditions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Covalent Organic Framework Applications · Organoboron and organosilicon chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Central Tribal University of Andhra Pradesh (CTUAP), Kondakarakam Village, Vizianagaram, Andhra Pradesh 535 003, India
Functional Materials for Electrochemistry and Solar Energy (FunMatES) Group, Energy and Environmental Chemistry Lab, Department of Chemistry
Birla Institute of Technology & Science, Pilani
Materials Science and Catalysis Division, Poornaprajna Institute of Scientific Research, Bidalur, Devanahalli, Bengaluru, 562164, India
Funding
Birla Institute of Technology and Science, Pilani
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