  Topotactic transition is a structural phase change in a matrix crystal
lattice mediated by the ordered loss/gain and rearrangement of atoms, leading
to unusual coordination environments and metal atoms with rare valent states.
As early as in 1990s, low temperature hydride reduction was utilized to realize
the topotactic transition. Since then, topological transformations have been
developed via multiple approaches. Especially, the recent discovery of the
Ni-based superconductivity in infinite-layer nickelates has greatly boosted the
topotactic transition mean to synthesizing new oxides for exploring exotic
functional properties. In this review, we have provided a detailed and
generalized introduction to oxygen-related topotactic transition. The main body
of our review include four parts: the structure-facilitated effects, the
mechanism of the topotactic transition, some examples of topotactic transition
methods adopted in different metal oxides (V, Mn, Fe, Co, Ni) and the related
applications. This work is to provide timely and thorough strategies to
successfully realize topotactic transitions for researchers who are eager to
create new oxide phases or new oxide materials with desired functions.
