Hierarchical Co3O4/SAPO-34 supported PtCo bimetallic nanoparticles as highly efficient catalyst for hydrogen generation from ammonia borane hydrolysis

Hierarchical Co3O4/SAPO-34 supported PtCo bimetallic nanoparticles (NPs) with uniform dispersion and narrow size-distribution were prepared for the hydrolysis of AB to produce hydrogen. Strategies including the sequential impregnation of cobalt and platinum precursors followed by partial reduction were em-ployed to anchor Pt NPs. Befitting from the interfacial interaction between Co and Co3O4 NPs, the inter -metallic synergistic effect of PtCo NPs and the synergistic interaction between Co NPs and SAPO-34 zeolite, the prepared Pt@Co/Co3O4/SP-10(40 0,2) catalyst exhibited outstanding catalytic activity with a high turn-over frequency (TOF) value of 314 molH2(molPt center dot min)-1 at 303 K. In addition, the flake-assemble hierarchical structure of SAPO-34 played an important role in improving the dispersion of metal NPs and the mass transfer rate between reactants and active sites. (c) 2023 Elsevier B.V. All rights reserved.