  Plasmonic excitations decay within femtoseconds, leaving non-thermal (often
referred to as "hot") charge carriers behind that can be injected into
molecular structures to trigger chemical reactions that are otherwise out of
reach -- a process known as plasmonic catalysis. In this Letter, we demonstrate
that strong coupling between resonator structures and plasmonic nanoparticles
can be used to control the spectral overlap between the plasmonic excitation
energy and the charge injection energy into nearby molecules. Our atomistic
description couples real-time density-functional theory self-consistently to
Maxwell's equations via the radiation-reaction potential. Control over the
resonator provides then an additional knob for non-intrusively enhancing
plasmonic catalysis and dynamically reacting to deterioration of the catalyst
-- a new facet of modern catalysis.
