Aerogel of chitosan/graphene oxide loaded Ru-CoP as a monolithic catalyst for hydrogen generation via NaBH4 hydrolysis

Powder type catalysts aren't often easily recycled after use and resulted in water pollution for hydrogen production by NaBH4 hydrolysis. Based on this, Ru-CoP is firstly anchored on the surface of graphene oxide (GO) by in-situ growth of ZIF-67, water etching, phosphating and loading Ru, then a novel composite aerogel-type catalyst is fabricated with chitosan (CS), GO and Ru-CoP@GO by the facile freeze-drying method. The results show that the hydrogen generation rate (HGR) of Ru-CoP@GO is 7200mLmin1 g 1 , catalyst and the activation energy is 47.7 kJ mol-1, which is not only the sheet catalyst with high catalytic perfor- mance, but also the excellent filler for composite aerogel, attributed to the strong interaction between Ru and Co species. Meanwhile, by regulating the amounts of CS, GO and Ru-CoP@GO, the loss rate of Ru- CoP@GO/CS aerogel is only 23% at the hydrogen generation rate (4712mLmin 1 g1 ) after five cycles of catalyst catalytic testing, which is due to structural coupling action and the formation of amide bond between Ru- CoP@GO, CS and GO, demonstrating an excellent structural stability. This work provides a precise and controllable strategy for the development of monolithic catalysts.(c) 2023 Elsevier B.V. All rights reserved.