Catalysis is a core area of contemporary science posing major fundamental and conceptual challenges, while being at the heart of the chemical industry. It is a major theme in chemical sciences and engineering that underlies much of the key research and teaching in these subjects. At this discussion, we will bring the catalysis community together to discuss the theme of designing new heterogeneous catalysts. Catalysis plays a crucial part in the production of 80% of all manufactured goods. We will explore the modern methods used to design new catalysts and how the approaches can bridge across the disciplines of physical sciences and chemical engineering Themes: - Catalyst design from theory to practice - In this session, we will explore how modern theoretical methods are aiding the design of new heterogeneous catalysts. This will invariably provide interplay between mechanism and the active site - Designing new catalysts: synthesis of new active structures - In this session, we will discuss ways in which new nanoparticulate structures can play a role in designing new active centres. How they can be prepared and their catalytic properties explored - Bridging model and real catalysts - We will discuss how modern methods in surface science and microscopy can aid the design of new catalysts. Recent advances in methodologies are enabling model surface science studies and real catalysts come closer together. This session will explore the nature of active catalyst sites - Application of novel catalysts - In this session we aim to show how new catalyst designs can find important applications that address key challenges facing society at this time, such as energy and water purification The aim of this discussion meeting is to develop fundamental understanding of key aspects of catalytic science, especially relating to, catalyst preparation and production, the determination of atomic-architectures of active, reactive and de-activated catalysts and the modelling of the active site in catalysis - knowledge which is essential for the design of new catalysts.