NiCeOx aerogels for methane suppression in the water-gas shift reaction
An oxide-based aerogel having cerium and nickel may be used as a water-gas shift reaction catalyst without producing methane as a byproduct. It may be made by forming a gel from a cerium salt and a nickel salt solution and converting the gel to an aerogel.
1. A composition comprising:
an oxide-based aerogel comprising cerium and nickel;
wherein the nickel atoms are atomically dispersed in the aerogel.
2. The composition of claim 1 , wherein the at % of nickel relative to cerium is from 1 at % to 15 at %.
3. The composition of claim 1 , wherein at least 50% of the nickel atoms are not adjacent to each other.
4. The composition of claim 1 , wherein at least 90% of the nickel atoms are not adjacent to each other.
5. A method comprising:
providing the composition of claim 1 ;
flowing a feed gas comprising water and carbon monoxide over the composition; and
performing a water-gas shift reaction.
6. The method of claim 5 , wherein the water-gas shift reaction does not produce methane.
7. The method of claim 5 , wherein the water-gas shift reaction converts at least 90% of the carbon monoxide to carbon dioxide.
8. A method comprising:
providing a solution comprising a cerium salt and a nickel salt;
forming an oxide-based gel comprising cerium, nickel, and oxygen from the solution; and
converting the gel to an aerogel;
wherein the nickel atoms are atomically dispersed in the aerogel.
9. The method of claim 8 , wherein the at % of nickel relative to cerium in the aerogel is from 1 at % to 15 at %.
10. The method of claim 8 , wherein at least 50% of the nickel atoms are not adjacent to each other.
11. The method of claim 8 , wherein at least 90% of the nickel atoms are not adjacent to each other.