Catalysis is fundamental to the making of the modern world, with the manufacture of most consumer products involving some form of catalysis. Efficient, selective, asymmetric (chiral) catalysis in particular is paramount in the manufacture of fine chemicals (e.g. pharmaceutical and agrochemical products) and, increasingly, advanced materials. Archetypal stereoselective chemical catalysts consist of well-defined, soluble (homogenous), metal-ligand complexes. These require careful design and are often difficult to develop/produce, making them expensive. Furthermore, many incorporate precious metals like platinum and palladium, deposits of which are limited, leading to sustainability concerns, which are only partially addressed by a movement to earth-abundant metals. Alternative approaches to homogenous catalysis include selective chiral 'poisoning' of catalysts, organocatalysis, reaction inside molecular containers ("Supramolecular Catalysts"), and the use of enzymes: all can offer some measure of selectivity, activity, and sustainability, but often to varying degrees beyond a narrow range of reactions, substrates, or conditions. By contrast, heterogeneous (insoluble/solid) catalysts are widely used in industrial chemistry, and typically are relatively cheap, sustainable, stable, recyclable, and easy to produce/obtain. However, heterogenous catalysts typically lack precisely-defined sterically-controlled active sites, akin to those which mediate control in homogenous catalysts, making design for (stereo)selectivity challenging. Attempts to achieve "the best of both worlds" -the selectivity of homogenous precious metal complexes, with the low cost and recyclability of heterogenous catalysts -have been numerous, but their success and adoption limited. Approaches to impart selectivity to catalytic surfaces by modifying them have included tethering otherwise-soluble metal complexes to surfaces, or depositing chiral compounds on their surface, have met with some success, but are not widely reported in routine use. In all these approaches, the catalyst -or catalytic surface -is engineered for selectivity: a costly and laborious process, even when successful.