Provided herein are corrosion-resistant reactors that can be used for gasification, and methods of making and using the same. Some embodiments include a corrosion-resistant ceramic layer. According to some embodiments, the corrosion-resistant ceramic layer has a negative charge. At temperature above water's critical point (for example, 374 CC and at 22.1 MPa I 218 atm), water can behave as an adjustable solvent and can have tunable properties depending on temperature and pressure.