  At the forefront of nanochemistry, there exists a research endeavor centered
around intermetallic nanocrystals, which are unique in terms of long-range
atomic ordering, well-defined stoichiometry, and controlled crystal structure.
In contrast to alloy nanocrystals with no atomic ordering, it has been
challenging to synthesize intermetallic nanocrystals with a tight control over
their size and shape. This review article highlights recent progress in the
synthesis of intermetallic nanocrystals with controllable sizes and
well-defined shapes. We begin with a simple analysis and some insights key to
the selection of experimental conditions for generating intermetallic
nanocrystals. We then present examples to highlight the viable use of
intermetallic nanocrystals as electrocatalysts or catalysts for various
reactions, with a focus on the enhanced performance relative to their alloy
counterparts that lack atomic ordering. We conclude with perspectives on future
developments in the context of synthetic control, structure-property
relationship, and application.
