fig7
Figure 7. (A) Schematic illustrations of the H2 bubble-release behavior of different Ni catalysts. (B) Contact angles on 3DP Ni and (C) NF. (D) Bubble adhesive force measurements of 3DP Ni and (E) NF. (F-I) Digital images of bubble release from 3DP Ni and (J-M) NF structures. This figure is quoted with permission from Kim et al.[91] and Xu et al.[92].
