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US 11,633,722 B2Granted
Catalyst for water splitting
AssigneeUchicago Argonne, LLC
InventorLina Chong
Life of this patent
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Abstract
Methods for producing a carbon-free, PGM-free support for PGM catalyst. The catalytic material comprises PGM metals disposed on a carbon-free support which is catalytic but free of PGM.
Claims14
A method comprising:
- preparing a platinum group metal (PGM)-free metal organic framework (MOF) material comprising MOF crystals;
- forming a mixture of MOF crystals suspended in a polymer solution;
- electrospinning the MOF crystals and polymer mixture, forming porous and interconnected nanofibers having MOF crystals uniformly dispersed;
- subjecting the metal organic framework containing porous nanofiber to a first heat treatment forming carbon-based nanofibers;
- depositing a platinum group metal on the carbon-based nanofibers forming a platinum group metal on nanofiber structure;
- and
- annealing the platinum group metal on nanofiber structure, removing carbon and forming a PGM catalyst on a non-PGM metal oxide, carbon-free catalytic support.
4 more elements
A nanofiber catalyst comprising:
- a transition metal oxide fibrous material having a plurality of pores within a series of transition metal oxide particles inter-connected and fused together in a nanofibrous network wherein the transition metal oxide particles comprise one or more of Co, Fe, Mn, Mo, Li, Nb, Ta, Zr, Y, and W;
- and
- a plurality of platinum group metal particles disposed on the transition metal oxide particles wherein the plurality of platinum group particles comprise a metal selected from the group consisting of Ir, Ru, Pt, Rh, Pd, and combinations thereof, further wherein the plurality of platinum group metal particles have a mixture of amorphous and crystalline structures.
Dependencies are inferred from the claim text.