Alkaline fuel cell electrode catalyst, alkaline fuel cell, and methods of making and using an electrode catalyst
View Patent ↗A fuel cell catalyst, including: one or more substantially monodisperse nanocrystals, wherein the one or more substantially monodisperse nanocrystals include an octahedral morphology or nanocrystal geometry including eight exclusively exposed {101} facets. In embodiments, a cathode including the fuel cell catalyst is also provided, including methods of making the fuel cell catalyst.
1 . A fuel cell catalyst, comprising: one or more substantially monodisperse CoMn 2 O 4 or CuMn 2 O 4 nanocrystals, wherein the one or more substantially monodisperse CoMn 2 O 4 or CuMn 2 O 4 nanocrystals comprise an octahedral morphology comprising eight exclusively exposed {101} facets.
2 . The fuel cell catalyst of claim 1 , wherein the one or more substantially monodisperse CoMn 2 O 4 or CuMn 2 O 4 nanocrystals have an average diameter of about 9 nm, and a monodispersity having a deviation of less than approximately ±1.0 nm.
3 . The fuel cell catalyst of claim 1 , wherein the one or more substantially monodisperse CoMn 2 O 4 or CuMn 2 O 4 nanocrystals are characterized as highly-efficient spinel oxide electrocatalysts toward ORR in alkaline media.
4 . The fuel cell catalyst of claim 1 , wherein the one or more substantially monodisperse CoMn 2 O 4 or CuMn 2 O 4 nanocrystals reach a maximum oxygen reduction reaction (ORR) mass activity in an alkaline media.
5 . The fuel cell catalyst of claim 1 , wherein the one or more substantially monodisperse CoMn 2 O 4 nanocrystals yield a high mass activity (MA) up to 60.0 A/g at 0.85 V, or the one or more substantially monodisperse CuMn 2 O 4 nanocrystals yield a high mass activity (MA) up to 37.6 A/g at 0.85 V.
6 . A cathode for an alkaline fuel cell, comprising: a fuel cell catalyst in accordance with claim 1 .
7 . An alkaline fuel cell, comprising: the cathode of claim 6 .
8 . A fuel cell catalyst, comprising: one or more substantially monodisperse CoMn 2 O 4 , CuMn 2 O 4 , ZnMn 2 O 4 , MgMn 2 O 4 , or NiMn 2 O 4 nanocrystals, wherein the one or more substantially monodisperse CoMn 2 O 4 , CuMn 2 O 4 , ZnMn 2 O 4 , MgMn 2 O 4 , or NiMn 2 O 4 nanocrystals are characterized as {101} facet terminated nano-octahedra spinel nanocrystals.
9 . The fuel cell catalyst of claim 8 , wherein the one or more substantially monodisperse CoMn 2 O 4 , CuMn 2 O 4 , ZnMn 2 O 4 , MgMn 2 O 4 , or NiMn 2 O 4 nanocrystals reach a maximum oxygen reduction reaction (ORR) mass activity in an alkaline media.
10 . A cathode for an alkaline fuel cell, comprising: a fuel cell catalyst in accordance with claim 8 .
11 . An alkaline fuel cell, comprising: the cathode of claim 10 .