I think this may be due not only to external factors, such as poisoning of the catalyst, etc., but also to internal factors, such as metallurgical sintering, etc., and I have surveyed by means of ...

A study successfully created a single-Pt-atom-on-Ru nanoparticle catalyst, which exhibited high resilience to CO poisoning and maintained a high current density for methanol oxidation over time[3].

"Sulfur oxides, such as SO 2, poison the catalyst by binding to the surface. This leaves fewer sites for CO 2 to react, and it also causes the formation of chemicals you don't want. "It happens ...