Remarkable activity of PdIr nanoparticles supported on the surface of carbon nanotubes pretreated via a sonochemical process for formic acid electro-oxidation

- The surface of CNTs was functionalized by a sonochemical process.
- The PdIr nanoparticles on CNTs have small mean size and narrow size distribution.
- The PdIr/CNT-SCP catalyst presents remarkable activity for formic acid electro-oxidation.
- The mass-normalized peak current density of PdIr/CNT-SCP is 3365 mA mg−1Pd.
- The peak current density of PdIr/CNT-SCP is 2.7 times higher than that of commercial Pd/C.