Octahedral palladium nanoparticles as excellent hosts for electrochemically adsorbed and absorbed hydrogen.

ABSTRACT: We report new results for electrochemical H adsorption on and absorption in octahedral palladium nanoparticles (Pd-NPs) with an average tip-to-tip size of 7.8 nm and a narrow size distribution. They reveal a very high H loading of 0.90 that cannot be achieved using bulk Pd materials or larger NPs; this behavior is assigned to a combination of two factors: their small size and face morphology. Temperature-dependent cyclic voltammetry (CV) studies in the range of 296 to 333 K reveal unique features that are attributed to electrochemical H adsorption, H absorption, and H₂ generation. The CV features are used to prepare H adsorption and absorption isotherms that are then used in thermodynamic data analysis. Modeling of the experimental results demonstrates that, upon H adsorption an

SUBMITTER: Zalineeva A 

PROVIDER: S-EPMC5291700 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature