Zn(ii)-MOF derived N-doped carbons achieve marked ORR activity in alkaline and acidic media

Abstract

A highly efficient metal-free N-doped carbon electrocatalyst toward oxygen reduction was obtained by one-pot pyrolysis of a single Zn (II)-MOF with mixed azolate and terephthalate ligands, demonstrating E1/2 of 0.88...

PGM-free single atom catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells

“…In contrast, other transition metals such as cobalt (Co), copper (Cu), zinc (Zn), and manganese (Mn), do not exhibit the same strong catalytic activity in the Fenton reaction as iron does. 94–100 Consequently, it is anticipated that M–N–C catalysts based on these Fe-free metal site will result in a reduction in the occurrence of the Fenton reaction, thereby enhancing the durability of the catalyst. In essence, the utilization of Fe-free metal to construct catalysts is anticipated to mitigate the degradation caused by the Fenton reaction.…”

Preparation and Characterization of Mercapto-Functionalized Calcined Attapulgite and Its Removal of Pb (II) and Cd (II) Solution

“…Figure 6 showed that the adsorption capacity for Cd (II) and Pb (II) increased with increasing pH values from 1.0 to 5.0, and then remained at a relatively high value at pH 5.0 in both single binary heavy metal ion systems, with adsorption capacities of 18.61 mg/g and 107.88 mg/g, respectively. In highly acidic media, acidic protons and metal ions compete for available alkaline sites [25]. Therefore, the optimal pH value of 5 was chosen for subsequent experiments.…”