Influence of the support and the preparation methods on the performance in citral hydrogenation of Pt-based catalysts supported on carbon nanotubes

► Oxidative treatments develop different oxygenated groups on the carbon nanotubes. ► Thermal treatments reduce the oxygenated groups and induce sintering of Pt. ► Platinum dispersion depends on the nature and amount of oxygenated groups. ► The Pt particle size is important for citral selective hydrogenation. ► The Fe content has a fundamental role on the selectivity to unsaturated alcohols.