Beschreibung:
The construction of non-precious metal composited oxide catalysts with controlled morphology and chemical composition is an effective way to promote hydrogen production from chemical hydrides. In this work, Co/CoFeO x -X bimetallic oxide nanofilms with an amorphous characteristic were prepared by applying an ionic liquid (IL)/water interface method for ammonia borane hydrolysis. The strategies, including adding the metal precursors rapidly and varying the Co/Fe atom ratios, were used to induce an amorphous structure through inhibiting rearrangement of formed metal nuclei and optimize the alloy effect on the IL/water interface. This ultrathin amorphous nanofilm structure can expose more metal active sites. And the electronic interaction of Fe ions doping into Co/CoO x nanofilms boosts the adsorption and activation for AB and water. Such, the optimized Co/CoFeO x -25 catalyst exhibits prominent catalytic activity, with the TOF value of 12.25 mol H2 mol Co min -1 higher than that of monometallic Co/CoO x catalyst. The efficient activity is attributed to morphology advantages and electronic effect of the Co/CoFeO x -25 catalyst. This work provides a promising method to design the highly effective non-noble metal catalysts for chemical hydride hydrolysis