US2021079540A1PendingUtilityA1

Binary alloys and oxides thereof for electrocatalytic reduction of carbon dioxide

43
Assignee: UNIV PRINCETONPriority: Sep 7, 2017Filed: Sep 7, 2018Published: Mar 18, 2021
Est. expirySep 7, 2037(~11.1 yrs left)· nominal 20-yr term from priority
Inventors:Andrew B. BocarslyAubrey ParisSonja A. FrancisAn-Hsiang A. Chu
C25B 11/089C25B 11/052C25B 3/26C25B 3/07C25B 9/17C25B 11/091C25B 3/25C25B 11/0478C25B 9/06C25B 3/04
43
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Claims

Abstract

In one aspect, systems for providing oxygenated organic products are described. In some embodiments, a system comprises an electrochemical cell including an electrolyte solution comprising CO2, and an electrode comprising an alloy and/or mixture of metal oxides. The electrode comprises an electrocatalytic site for reduction of CO2 to CO, wherein CO is incorporated into the oxygenated organic products. In some embodiments, the alloy comprises at least one of a transition metal and post-transition metal. Moreover, metal oxides of the electrode can comprise at least one of a transition metal oxide and post-transition metal oxide.

Claims

exact text as granted — not AI-modified
1 . A system for providing oxygenated organic products comprising:
 an electrochemical cell including an electrolyte solution comprising CO 2 , and a working electrode comprising a transition metal/post transition metal (TM/PTM) binary alloy and/or oxide(s) thereof for electro catalytic reduction of the CO 2  to the oxygenated organic products, wherein the oxygenated organic products comprise two or more carbon atoms and/or two or more oxygen atoms.   
     
     
         2 . The system of  claim 1 , wherein the TM/PTM binary alloy is of the formula TM x PTM y , and x and y are integers independently selected from 1 to 10. 
     
     
         3 . The system of  claim 1 , wherein the TM is a first row transition metal. 
     
     
         4 . The system of  claim 1 , wherein the PTM is selected from Group IIB or IIIA of the Periodic Table. 
     
     
         5 . The system of  claim 1 , wherein the electrolyte solution further comprises CO. 
     
     
         6 . The system of  claim 1 , wherein the oxygenated organic products comprise oxalate. 
     
     
         7 . The system of  claim 1 , wherein the TM is selected from Group VIIIB and the PTM is selected from group IIIA of the Periodic Table. 
     
     
         8 . The system of  claim 7 , wherein the TM is nickel and the PTM is aluminum. 
     
     
         9 . The system of  claim 1 , wherein the TM is chromium and the PTM is selected from Group IIIA of the Periodic Table. 
     
     
         10 . The system of  claim 1 , wherein transition metal oxide/post transition metal oxide comprises Cr 2 O 3 —Ga 2 O 3 . 
     
     
         11 . The system of  claim 1 , wherein the electrolyte solution has an acidic pH. 
     
     
         12 . A system for providing oxygenated organic products comprising:
 an electrochemical cell including an electrolyte solution comprising CO 2 , and an electrode comprising an alloy and/or mixture of metal oxides, the electrode having an electrocatalytic site for reduction of CO 2  to a CO, wherein the CO is incorporated into the oxygenated organic products.   
     
     
         13 . The system of  claim 12 , wherein the alloy comprises at least one of a transition metal and post-transition metal. 
     
     
         14 . The system of  claim 12 , wherein the metal oxides comprise at least one of a transition metal oxide and post-transition metal oxide. 
     
     
         15 . The system of  claim 14 , wherein the transition metal oxide comprises a first row transition metal. 
     
     
         16 . The system of  claim 14 , wherein the post-transition metal oxide comprises a metal selected from group IIB or IIIA of the Periodic Table. 
     
     
         17 . The system of  claim 12 , wherein the mixture of metal oxides comprise chromium oxide and gallium oxide. 
     
     
         18 . The system of  claim 12 , wherein the oxygenated organic products comprise oxalate. 
     
     
         19 . The system of  claim 12 , wherein the electrolyte solution has an acidic pH. 
     
     
         20 . The system of  claim 12 , wherein the electrocatalytic site is anionic. 
     
     
         21 . A system for providing organic products comprising:
 an electrochemical cell including an electrolyte solution comprising CO 2 , and a working electrode comprising a transition metal/post-transition metal (TM/PTM) binary alloy and/or oxide(s) thereof for electrocatalytic reduction of the CO 2  to the organic products.   
     
     
         22 . The system of  claim 21 , wherein the organic products comprise one carbon atom, two carbon atoms, three carbon atoms or mixtures thereof. 
     
     
         23 . The system of  claim 21 , wherein the organic products are oxygenated. 
     
     
         24 . The system of  claim 21 , wherein the organic products are aliphatic. 
     
     
         25 . The system of  claim 21 , wherein the TM/PTM binary alloy is of the formula TM x PTM y , and x and y are integers independently selected from 1 to 10. 
     
     
         26 . The system of  claim 21 , wherein the TM is a first row transition metal. 
     
     
         27 . The system of  claim 26 , wherein the PTM is selected from Group IIB or IIIA of the Periodic Table. 
     
     
         28 . The system of  claim 21 , wherein transition metal oxide/post transition metal oxide comprises Cr 2 O 3 —Ga 2 O 3 . 
     
     
         29 - 42 . (canceled)

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