Spontaneous galvanic displacement of Pt nanostructures on nickel foam: Synthesis, characterization and use for hydrogen evolution reaction

摘要: Abstract In this paper we propose the use of spontaneous galvanic displacement as a promising solution to produce nickel foam electrodes functionalized with interconnected platinum nanoparticles. Scanning Electron Microscopy analyses, coupled X-ray Energy Dispersive Spectroscopy show that, under proper conditions, can overcome limits other deposition techniques, achieving uniform Pt coverage throughout 3D structure Ni foam. We that such condition, not deeply investigated in previous literature, turns out be crucial for long term stability constant current stress. The amount on has been experimentally evaluated, obtaining optimal results 0.015 mg cm−2 noble metal 0.16 cm thick electrode. Such low corresponds cost increase less than 0.1%.