Abstract: Described herein are coatings. The coatings can, for example, catalyze carbon gasification. In some examples, the coatings comprise: a first region having a first thickness, the first region comprising a manganese oxide, a chromium-manganese oxide, or a combination thereof; a second region having a second thickness, the second region comprising Ni, Fe, W, Cr, Co, Mn, Ti, Mo, V, Nb, Zr, Si, C, or a combination thereof; and an alkaline earth metal, an alkaline earth oxide, an alkaline earth carbonate, an alkaline earth silicate, molybdemun, a molybdenum oxide, a molybdenum carbide, a mixed-metal perovskite, a mixed metal inorganic oxide, or a combination thereof.

Abstract: Described herein are coatings. The coatings can, for example, catalyze carbon gasification. In some examples, the coatings comprise: a first region having a first thickness, the first region comprising manganese oxide, a chromium-manganese oxide, or a combination thereof, and CaWO4, Ba3Y2WO9, or a combination thereof; a second region having a second thickness, the second region comprising X6W6Z, XWZ, or a combination thereof, wherein X is independently Ni or a mixture of Ni and one or more transition metals and Z is independently Si, C, or a combination thereof. In some examples, the coatings further comprise a rare earth element, a rare earth oxide, or a combination thereof.

Abstract: This disclosure describes a coating composition comprising: MnxOy, MnCr2O4, or combinations thereof in a first region of a coating having a first thickness, wherein x and y are integers between 1 and 7; and X6W6(Siz, C1-z) in a second region of the coating having a second thickness, wherein X is Ni or a mixture of Ni and one or more transition metals and z ranges from 0 to 1.

Abstract: This disclosure describes a coating composition comprising: MnxOy, MnCr2O4, or combinations thereof in a first region of a coating having a first thickness, wherein x and y are integers between 1 and 7; and X6W6(Siz, C1-z) in a second region of the coating having a second thickness, wherein X is Ni or a mixture of Ni and one or more transition metals and z ranges from 0 to 1.