Ankica Kovač, Ph.D., is an Associate Professor at the University of Zagreb Faculty of Mechanical Engineering and Naval Architecture, where she holds the position of Head of the Hydrogen Laboratory and the Power Engineering Laboratory. Dr. Kovač holds her Ph.D. in green hydrogen production. Her research interests include the whole hydrogen value chain from hydrogen production (water electrolysis in conjunction with renewable energy sources), hydrogen storage, and distribution to hydrogen usage in fuel cells. She is co-editor of the book Fuel Cell and Hydrogen Technologies in Aviation (Springer, 2022) and has authored scientific papers published in international scientific journals and conference proceedings. Dr. Kovač is the founder and chair of the Renewable Hydrogen Energy Convention (RH2EC). She is a member of the Executive Committee of the Collaboration Program on Advanced Fuel Cells and the committee’s representative of the Republic of Croatia. Dr. Kovač is a member of the Council of the President of the Republic of Croatia for Energy Transition, Vice President of the Croatian Hydrogen Association, and Vice President of the expert-working group for the development of the Croatian Hydrogen Strategy. She is a Guest Editor of the International Journal of Hydrogen Energy and Energies Journal. She was awarded the Croatian Woman of Influence Award in Leadership and Innovation.

• Chapter 1. Considerations for a scalable business model for clean hydrogen.- Chapter 2. Public transit zero emissions busapplications: battery and electric bus comparison in a Canadian case study.- Chapter 3. Sustainable Electrocatalyst for PEM Water Electrolyzers.- Chapter 4. The concept of electrochemical hydrogen compression and purification technology.- Chapter 5. The role of hydrogen in energy system: state of art and future prospects.