Researchers from Tsinghua University tested platinum catalysts on five oxide supports for producing hydrogen from a liquid methanol-water mixture. In a study published in Energy & Environment Nexus, they found that surface hydroxyl groups on amphoteric oxides like alumina play the main role in driving the reaction. At 250 C, Pt/Al2O3 released hydrogen at 846.9 μmol per gram of platinum per second, more than twice the rate of Pt/CeO2 and about 20 times the rate of Pt/SiO2. The team used spectroscopy to show how each support changes the reaction path. On ceria, reactive lattice oxygen helped form formate but trapped it, blocking further conversion. On silica, weak metal-support interaction slowed methanol decomposition. The conclusion is that a balanced oxide surface matters more than oxygen reactivity or vacancy abundance. That points toward catalyst designs that keep accessible hydroxyls available and avoid supports that bind intermediates too strongly. For hydrogen storage, the work supports the idea of using methanol as a liquid carrier and releasing hydrogen on demand at moderate temperatures. The practical value depends on scaling these catalysts beyond the lab and on producing methanol from low-carbon sources.
