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US 11,962,018 B2Granted
Electrochemical oxygen reduction catalyst
AssigneeNational Institute of Advanced Industrial Science and Technology
InventorMasafumi Asahi
Life of this patent
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Abstract
An electrochemical oxygen reduction catalyst comprising platinum-containing nanoparticles and at least one member selected from the group consisting of a melamine compound, a thiocyanuric acid compound, and a polymer containing the melamine compound or the thiocyanuric acid compound as a monomer is an electrochemical oxygen reduction catalyst having a high oxygen reduction activity (small overvoltage).
Claims9
An electrochemical oxygen reduction catalyst comprising platinum-containing nanoparticles and a polymer containing a melamine compound or a thiocyanuric acid compound as a monomer,
- wherein the polymer containing the melamine compound or the thiocyanuric acid compound as a monomer is a polymer containing a repeating unit represented by formula (2):
- wherein
- Ys may be the same or different, and represent nitrogen or sulfur;
- R4 to R8 may be the same or different, and represent a divalent group;
- R9 to R11 may be the same or different, and represent hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted aryl;
- m1 is 1 or 2, with the proviso that when Y to which R6 is bonded is sulfur, m1 is 1;
- and when m1 is 2, two R6s may be the same or different and two R10s may be the same or different;
- m2 and m3 may be the same or different, and represent 0 or 1, with the proviso that Y to which R7 or R8 is bonded is sulfur, m2 and m3 are 0;
- and
- OR9 to OR11 may be partially or fully eliminated, and cross-linked to the divalent group represented by R4 to R8 to form a three-dimensional mesh structure.
7 more elements
Dependencies are inferred from the claim text.