Dilute Pd3Co950 alloy encapsulated in defect- and N-rich carbon nanotubes for universal highly efficient aqueous-phase catalysis

Graphene Chainmail Shelled Dilute Ni─Cu Alloy for Selective and Robust Aqueous Phase Catalytic Hydrogenation

“…According to the EXAFS data fit (Figure S16 and Table S4, Supporting Information), the Ni─Cu coordination bond length of 2.41 Å was smaller than that of Ni─Ni bond (2.46 Å) or Cu─Cu bond (2.53 Å), and the Ni─Cu coordination number of ≈8.6 was below those in typical FCC body and surface (111) with coordination numbers of 12 and 9, confirming singularly dispersed Ni on the Cu host containing dangling bonds. [ 45,48 ] No Ni─Ni and Ni─O coordination could be detected.…”

“…The excellent linear relationship between E a and activation entropy (Δ S 0 *) (Figure 5e) confirms the compensation effect likely due to loosened bonding between surface atoms and adsorbates as the system energy increases. [ 48,50 ] To further explain the high chemoselectivity of CuNi 0.05 @OC, we implemented in situ DRIFT for competitive adsorption of chlorobenzene and nitrobenzene on CuNi 0.05 @OC and Ni@OC, respectively, as shown in Figure 5f,g. The DRIFTS for CuNi 0.05 @OC include characteristic bands located at 1518.9 and 1346.1 cm −1 assigned to the N═O bond of nitrobenzene, and at 846.2 cm −1 corresponding to the C─Cl bond of chlorobenzene in the vibrational band.…”