Enhanced catalytic performance in hydrogen generation from NaBH 4 hydrolysis by super porous cryogel supported Co and Ni catalysts

摘要: Abstract The neutral 3-D superporous cryogel is prepared from a poly(acrylamide) (p(AAm)) hydrogel network modified with an amidoximation reaction to induce chemical changes produce amidoximated-p(AAm) (amid-p(AAm)) cryogel. newly-formed strongly ionizable matrices can readily absorb metal ions such as Co(II) and Ni(II) enabling in situ preparation of corresponding nanoparticles by NaBH 4 treatments. It found that the amid-p(AAm)-Co composite very effective catalyst for H 2 generation hydrolysis alkaline medium. Furthermore, it demonstrated ion loading capacity catalytic activity composites increased 2nd 3rd reduction cycles. hydrogen rate p(AAm)-Co 1926.3 ± 1.1 1130.2 1.5 (mL ) (min) −1 (g M) . effect various parameters porosity, type, number reloading cycles ion, temperature are investigated kinetic energy, enthalpy entropy determined Ea = 39.7 0.2 kJ mol , ΔH 37.2 0.1 ΔS −171.9 0.5 J K respectively.