1 research outputs found
Ru Nanoframes with an fcc Structure and Enhanced Catalytic Properties
Noble-metal
nanoframes are of great interest to many applications due to their
unique open structures. Among various noble metals, Ru has never been
made into nanoframes. In this study, we report for the first time
an effective method based on seeded growth and chemical etching for
the facile synthesis of Ru nanoframes with high purity. The essence
of this approach is to induce the preferential growth of Ru on the
corners and edges of Pd truncated octahedra as the seeds by kinetic
control. The resultant Pd–Ru core–frame octahedra could
be easily converted to Ru octahedral nanoframes of ∼2 nm in
thickness by selectively removing the Pd cores through chemical etching.
Most importantly, in this approach the face-centered cubic (fcc) crystal
structure of Pd seeds was faithfully replicated by Ru that usually
takes an hcp structure. The fcc Ru nanoframes showed higher catalytic
activities toward the reduction of <i>p</i>-nitrophenol
by NaBH<sub>4</sub> and the dehydrogenation of ammonia borane compared
with hcp Ru nanowires with roughly the same thickness