"On-off"controlled H2 evolution and O2 evolution upon NH3BH3 hydrolysis resp.H2O2 decomposition on Pt/ZIF-67

作者：Rong, Qi; Huang, Wenkai; Xu, Fuhua; Wang, Yanlan; Wang, Changlong^*; Liu, Xiang^*

来源：Fuel, 2023, 341: 127721.

DOI：10.1016/j.fuel.2023.127721

• H-2 evolution
• O-2 evolution
• Pt/ZIF-67
• Fuel cell
• "On-off" control

In spite of significant developments are accomplished in the exploration of H-2 and O-2 evolution upon water electrolysis/photolysis, this remains a challenge to design and develop ideal catalytic systems for this reaction and to isolate H-2 from H-2-O-2 mixture with membranes. Herein, a series of ZIF-67-supported transition metal nanoparticles (TMNPs/ZIF-67), including Pt, Ir, Pd, Rh, Au and Ag, via immobilization of ultrafine TMNPs at the surface of ZIF-67, have been designed and developed for the selective H-2 generation from NH3BH3 hydrolysis and O-2 evolution upon H2O2 decomposition. In particular, the optimized nanocatalyst Pt/ZIF-67 presents the superhigh catalytic property in the both H-2 evolution upon NH3BH3 hydrolysis (689 mol(H-2)center dot mol(Pt)(-1)center dot min(-1)) and O-2 evolution upon H2O2 decomposition (979 mol(O-2)center dot mol(Pt)(-1)) at 30 degrees C. Importantly, the selective "on-off" control for demand-based H-2 generation from NH3BH3 hydrolysis was successfully realized by Zn2+/EDTA-2Na system. This highly efficient Pt/ZIF-67 proposed a new method for the promising potential application of ammonia borane and hydrogen peroxide as an economic and safe H-2 resp. O-2 carrier for fuel cell.

• 单位
  北京工业大学