Fig. 5: Thermally robust, long-term stable hydrogen separations with atomically thin nanoporous membranes.
From: Edge-activated graphene nanopores for thermally robust hydrogen membrane separations
a single gas permeance and corresponding hydrogen selectivity against methane at various temperatures. The temperature was increased from 300 K to 473 K and then returned to 300 K (as shown in the far-right group). b binary gas mixture permeance and hydrogen selectivity. The same membrane was used for both single and mixture tests. c permeances of hydrogen, tetralin, cis- and trans-decalin mixture, along with respective hydrogen selectivity at 500 K. d measurement of hydrogen permeance at 500 K over 40 days. The permeance shown is for nanoporous graphene, calculated by normalizing to the open graphene area, i.e., 0.47% of the total membrane area of PITEM(10)_G_Pore. The error bars on the y-axis denote the standard deviation of the measured permeance data. The numbers at the top left of (a, b) indicate the multiplication factor (e.g., 1e-8) applied to the y-axis values. Source data are provided as a Source Data file.
