Hybrid system for potential room temperature hydrogen storage

• Electrochemical anodization has been found an appropriate technique to etching process.
• Metal decoration can improve the hydrogen storage capacity of initial porous silicon.
• This triple-component system may be useful for mobile application.

In this study, the hydrogen storage of porous silicon-based systems is considered. In this regard, the electrochemical anodization process was employed to introduce porous structure over silicon wafer. Moreover, the Pd nanoparticles as great reservoirs of hydrogen species were deposited over porous silicon; using electroless technique. X-ray diffraction, Fourier transfer infrared, and Field emission scanning electron microscopic measurements were employed to study the structure and morphology of fabricated samples. Crystal faces and various Si−H as well as Si−O bonds were defined through X-ray diffraction and Fourier transfer infrared characterizations. Also, palladium clusters were recognized through Field emission scanning electron microscopic measurements. Hydrogen storage measurements revealed that porous silicon might contribute in hydrogen storage, slightly; while Pd/porous silicon demonstrated a great potential, in this regard. Moreover, variation of electroless quality proved that as deposition time increases, Pd clustering over porous substrate enhances; consequently, improve the storage capacity.

Figure optionsDownload high-quality image (171 K)Download as PowerPoint slide