Abstract
Graphite nanofibers (GNFs) were doped with platinum in an attempt to activate the materials for moderate temperature hydrogen adsorption. Characterization of the 1% Pt/GNF sample indicates well-dispersed, metallic platinum particles ranging from 2 to 5 nm in diameter. At 27 °C and 20 bar, the hydrogen uptake of 1% Pt/GNF was less than 0.1 wt % and showed no increase relative to the GNF precursor within experimental detection limits. To explore this apparent anomaly, a stochastic Monte Carlo simulation was used to analyze the hydrogen spillover process for idealized two-dimensional surfaces with two surface types with interfacial mass transfer from the first to the second surface site. The model suggests interfacial mass transfer may not improve overall surface coverage when the rates of adsorption and desorption to the support are comparable. Dimensionless groupings are introduced to the stochastic simulation to explore the conditions in which interfacial transfer will lead to significant surface coverage...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.