4 research outputs found
Synthesis and Protonation of Molybdenum– and Tungsten–Dinitrogen Complexes Bearing PNP-Type Pincer Ligands
Novel molybdenum– and tungsten–dinitrogen
complexes
bearing PNP-type pincer ligands are prepared and characterized by
X-ray analysis. Reactions of these molybdenum– and tungsten–dinitrogen
complexes with an excess amount of sulfuric acid in THF at room temperature
afford ammonia and hydrazine in good yields
Synthesis and Catalytic Activity of Molybdenum–Dinitrogen Complexes Bearing Unsymmetric PNP-Type Pincer Ligands
Novel dinitrogen-bridged dimolybdenum complexes bearing
unsymmetric PNP-type pincer ligands are prepared and characterized
by X-ray analysis. A molybdenum–dinitrogen complex bearing
2-(di-1-adamantylphosphino)Âmethyl-6-(di-<i>tert</i>-butylphosphino)Âmethylpyridine
has been found to work as an effective catalyst toward the formation
of ammonia from molecular dinitrogen under ambient conditions
Synthesis and Catalytic Activity of Molybdenum–Dinitrogen Complexes Bearing Unsymmetric PNP-Type Pincer Ligands
Novel dinitrogen-bridged dimolybdenum complexes bearing
unsymmetric PNP-type pincer ligands are prepared and characterized
by X-ray analysis. A molybdenum–dinitrogen complex bearing
2-(di-1-adamantylphosphino)Âmethyl-6-(di-<i>tert</i>-butylphosphino)Âmethylpyridine
has been found to work as an effective catalyst toward the formation
of ammonia from molecular dinitrogen under ambient conditions
Layered Perovskite Oxide: A Reversible Air Electrode for Oxygen Evolution/Reduction in Rechargeable Metal-Air Batteries
For the development of a rechargeable
metal-air battery, which
is expected to become one of the most widely used batteries in the
future, slow kinetics of discharging and charging reactions at the
air electrode, i.e., oxygen reduction reaction (ORR) and oxygen evolution
reaction (OER), respectively, are the most critical problems. Here
we report that Ruddlesden–Popper-type layered perovskite, RP-LaSr<sub>3</sub>Fe<sub>3</sub>O<sub>10</sub> (<i>n</i> = 3), functions
as a reversible air electrode catalyst for both ORR and OER at an
equilibrium potential of 1.23 V with almost no overpotentials. The
function of RP-LaSr<sub>3</sub>Fe<sub>3</sub>O<sub>10</sub> as an
ORR catalyst was confirmed by using an alkaline fuel cell composed
of Pd/LaSr<sub>3</sub>Fe<sub>3</sub>O<sub>10–2<i>x</i></sub>(OH)<sub>2<i>x</i></sub>·H<sub>2</sub>O/RP-LaSr<sub>3</sub>Fe<sub>3</sub>O<sub>10</sub> as an open circuit voltage (OCV)
of 1.23 V was obtained. RP-LaSr<sub>3</sub>Fe<sub>3</sub>O<sub>10</sub> also catalyzed OER at an equilibrium potential of 1.23 V with almost
no overpotentials. Reversible ORR and OER are achieved because of
the easily removable oxygen present in RP-LaSr<sub>3</sub>Fe<sub>3</sub>O<sub>10</sub>. Thus, RP-LaSr<sub>3</sub>Fe<sub>3</sub>O<sub>10</sub> minimizes efficiency losses caused by reactions during charging
and discharging at the air electrode and can be considered to be the
ORR/OER electrocatalyst for rechargeable metal-air batteries