The effect of citric acid on the microstructure and activity of MoP phosphide for dry reforming of methane

Abstract

A series of MoP catalysts (MoP-CAx) were synthesized by adding citric acid (CA) to solutions of (NH₄)₆Mo₇O₂₄·4H₂O and (NH₄)₂HPO₄ with a fixed molar ratio of Mo:P:CA = 1:1: x (x = 0, 1, 4, 8) followed by drying and reduction in H₂. The addition of CA had a significant effect on the microstructure (surface area and particle dispersion) and performance of MoP for dry reforming of methane (DRM). Among these MoP-CAx catalysts, the MoP-CA8 was found to show the highest catalyst stability, which should be attributed to the best matching of oxidation resistance ability and methane dissociation ability of MoP.

Graphical Abstract

Keywords:

• Citric acid
• MoP
• dry reforming of methane
• oxidation resistance ability
• methane dissociation ability

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the National Natural Science Foundation of China (No. 21978125), the Liaoning Revitalization Talents Program (No. XLYC1907003), the Fushun Revitalization Talents Program (No. FSYC202101001), the Project of Liaoning Province Department of Education (No. LJKZ0376), and Liaoning BaiQianWan Talents Program.