Document Type

Journal Article

Publication Date



The need of a sustainable low carbon transport and logistics has becoming one of the top agendas in Hong Kong after many countries set the emission targets in the Conference of Parties to the United Nation Framework Convention on Climate Change (COP21) and the policies on banning new petrol and diesel cars in 2030 or 2040. Promoting the development of renewable energy as an integral part of mitigating climate change has been stressed in the Policy Address of Hong Kong in 2021. With a target being set in Hong Kong to become carbon neutral by 2050, the exploration in the use of renewable energy as the major vehicles in transport and logistics is becoming critical to sustain its long-term decarbonisation strategy as a smart city with low carbon transport and logistics. Single-atom catalysts have been known to boost catalytic performance of many reactions using nanoparticles catalysts such as electrochemical reaction due to their higher surface energy and more efficient atomic utilization. However, their function in the hydrolysis of ammonia borane for hydrogen generation remains elusive. This project is to unravel their role in this type of reaction to lay the foundation for further improvement in catalytic performance. It was found that catalyst pyrolyzed at 800oC exhibited the best hydrogen releaseperformance. Catalysts first undergo an activation period due to the formation of an active single atom intermediate HO*-(Co-N2)- at optimal pH for fast H2O adsorption kinetics and eventually reach a maximum rB of 7833.4 ml H2 gCo-1 min-1 at 40°C.