Ni-doped activated carbon nanofibers for storing hydrogen at ambient temperature: Experiments and computations

Boosting Adsorption Isosteric Heat for Improved Gravimetric and Volumetric Hydrogen Uptake in Porous Carbon by N-Doping

“…Furthermore, the element mapping images of NHPC-2 demonstrate a uniform distribution of N and O on the carbon matrix (Figures S7 and S8). Functional groups, such as carboxyl groups (–CO/CN at 1633 cm –1 ), hydroxyl groups (−OH, 3446 cm –1 ), and C–O–C (876–1115 cm –1 ), ,, are observed in the FT-IR spectra (Figure a).…”

Nanoscale engineering of solid-state materials for boosting hydrogen storage

“…132 Thaweelap et al studied the hydrogen adsorption on the Nidoped activated carbon nanofibers (ACNF). 133 The appropriate Fig. 5 The comparison of hydrogen storage properties for different element doped-porous materials (the highlighted colors show the enhancement of hydrogen storage capacity).…”

“…132 Thaweelap et al studied the hydrogen adsorption on the Ni-doped activated carbon nanofibers (ACNF). 133 The appropriate Ni loading content and the interaction between Ni NPs and N atoms in ACNF structure result in a uniform distribution and small sizes (5–10 nm) of Ni NPs in 5 wt% Ni-doped ACNF, leading to 0.55 wt% H 2 under 20 bar H 2 and 298 K as compared with ACNF, only 0.18 wt% H 2 . Upon adsorption, Ni tends to form robust chemisorption Ni–H bonds by sharing its electrons with H. The hydrogen adsorption mechanisms, revealed by in situ XANES studies, included not only chemisorption onto Ni nanoparticles but also physisorption and hydrogen spillover.…”

Carbon‐Based Sorbents for Hydrogen Storage: Challenges and Sustainability at Operating Conditions for Renewable Energy

“…Lee and Park [27] have synthesized Pt‐doped AC/MOF (Pt‐ACs‐MOF‐5) composite having gravimetric storage of 2.3 wt % at 298 K and 100 bar (five times more than raw AC). The AC nanofiber doped with Ni nanoparticles can attain reasonable hydrogen adsorption (2.12 wt %) at 100 bar and 25 °C [59a] . However, the modest doping of Pd nanoparticles on AC attains only <0.2 wt % hydrogen uptake at 298 K and 2–3 MPa pressure [32] .…”