A small number of isolated Au3+ ions (0.02 Au3+/nm2) heterogenized on a zirconia surface from a cheap inorganic source (HAuCl4) is able to grant high catalytic activity for the selective hydrogenation of 1,3‐butadiene (see picture). The catalytic turnover and mass activity rates of the Au3+ ions are respectively one and two orders of magnitude higher than those of metallic gold nanoparticles.

The unique properties of self-healing materials hold great potential in the field of biomedical engineering. Although previous studies have focused on the design and synthesis of self-healing materials, their application in in vivo settings remains limited. Here, we design a series of biodegradable and biocompatible self-healing elastomers (SHEs) with tunable mechanical properties, and apply them to various disease models in vivo, in order to test their reparative potential in multiple tissues and at physiological conditions. We validate the effectiveness of SHEs as promising therapies for aortic aneurysm, nerve coaptation and bone immobilization in three animal models. The data presented here support the translation potential of SHEs in diverse settings, and pave the way for the development of self-healing materials in clinical contexts.

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