Highly efficient hydrogen production from hydrolysis of ammonia borane over nanostructured Cu@CuCoO x supported on graphene oxide.

•A hybrid nanocatalyst composed of heterostructured Cu@CuCoO and conductive GO support is reported.•The hybrid nanocatalyst synergistically boosts catalytic performance toward hydrolysis of ammonia borane.•The design principle is applicable for high-performance nanocatalysts toward the removal of various hazardous materials.