Palladium electrodissolution from model surfaces and nanoparticles
作者： Enrico Pizzutilo , Simon Geiger , Simon J. Freakley , Andrea Mingers , Serhiy Cherevko
DOI: 10.1016/J.ELECTACTA.2017.01.127
关键词: Dissolution 、 Proton exchange membrane fuel cell 、 Horizontal scan rate 、 Palladium 、 Nanoparticle 、 Platinum 、 Metallurgy 、 Catalysis 、 Chemistry 、 Electrochemistry 、 Inorganic chemistry
摘要: Abstract Palladium (Pd) is considered as a possible candidate catalyst for proton exchange membrane fuel cells (PEMFCs) due to its high activity and affordable price compared platinum (Pt). However, the stability of Pd known be limited, yet still not fully understood. In this work, dissolution studied in acidic media using an online inductively coupled plasma mass spectrometry (ICP-MS) combination with electrochemical scanning flow cell (SFC). Crucial parameters influencing like potential scan rate, upper limit (UPL) electrolyte composition are on bulk polycrystalline (poly-Pd). Furthermore, comparison supported high-surface area carried out use industrial applications. For aim, carbon nanocatalyst (Pd/C) synthesized performance that poly-Pd. Our results evidence transient promoted by three main contributions (one anodic two cathodic). At potentials below 1.5 V RHE dominating mechanism, whereas at higher cathodic mechanisms prevail. On basis obtained results, model thereafter proposed explain dissolution.
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