Carbon dioxide and hydrogen as building blocks for a sustainable interface of energy and chemistry.

Hydrogen as energy vector from renewable sources and carbon dioxide as carbon source are central elements of a future sustainable interface between energy and chemistry. While often viewed merely as "substitutes" for fossil resources, the current article discusses opportunities to open new synthetic pathways and to generate novel molecular architectures for the delivery of the same or even improved functionalities expected from chemical products. Catalysis is the key science and technology in this endeavour and three general principles for the desing of catalytic systems are proposed as guidelines for fundamental research. This article is part of the discussion meeting issue 'Green carbon for the chemical industry of the future'.