3D hollow microrod engineered MOF-derived Cu/Co catalysts promoted by Al nanoflakes for efficient H2 generation through NaBH4 hydrolysis: Perceptions on boosted reaction channels aided by a synergistic effect

Abstract

Since sodium borohydride (NaBH4) has been broadly recognized as an advantageous hydrogen storage material, it is crucial to develop a proficient catalyst for the innovative and effective use of hydrogen energy for electric vehicles and portable electronic devices. Current work demonstrates the series of designed CRxCT1-x@DABCO-MOF hollow micro rods supported by the active doping of Al nanoflakes as an efficient and stable catalyst for the hydrolysis and electrooxidation of NaBH4. The structural, physicochemical, thermal and electrochemical features of the prepared MOF catalysts have been investigated through various analytical techniques. As per the experimental results, Al-8/CR/CT-2@DABCO-MOF has exhibited outstanding performance of 633.90 mL hydrogen production through the hydrogen generation rate of 423.40 mLg−1min−1 and activation energy of 38.66 kJmol−1. Besides that Al-8/CR/CT-2@DABCO-MOF catalyst also exhibited excellent electrooxidation properties. The outstanding activity was credited to the catalytic synergistic effect among the Co, Cu and Al as well as the unique structure provided by Al nanoflakes which offered high surface area with more active sites and high stability to MOF structure which enabled the intimate contact between water molecules and the surface of the MOF and hence maximum H2 was produced. Overall this MOF structure claimed their potential candidature for portable hydrogen devices.