Details

Autor(en) / Beteiligte

• Xie, Yunchao
• Zhang, Chi
• He, Xiaoqing
• Su, Jheng-Wun
• Parker, Thomas
• White, Tommi
• Griep, Mark
• Lin, Jian

Titel

Copper-promoted nitrogen-doped carbon derived from zeolitic imidazole frameworks for oxygen reduction reaction

Ist Teil von

• Applied surface science, 2019-01, Vol.464, p.344-350

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• •Cu promoted nitrogen-doped carbon was prepared.•The Cu-N/C electrocatalyst exhibited satisfactory ORR activity.•The Cu-N/C showed great methanol tolerance and long-term stability. Rational design of oxygen reduction reaction (ORR) electrocatalysts based on earth-abundant elements is critical important towards sustainable energy applications. Among various reported ORR electrocatalysts, transition metal-nitrogen doped carbon (TM-N/C) materials such as Fe-Nx/C and Co-Nx/C exhibit excellent catalytic activity. Nevertheless, comprehensive understanding of these TM-N/C electrocatalytic systems is still lacking, which demands extension of investigation to other TM-N/C systems (Cu, and Mn, etc.). Herein, we developed a Cu promoted nitrogen-doped carbon (Cu-N/C) via high temperature pyrolysis of Cu-adsorbed zeolite imidazole frameworks (Cu@ZIF-8). The Cu-N/C electrocatalyst exhibited satisfactory ORR activity with half-wave potential of 0.813 V in 0.1 M KOH electrolyte. Moreover, it also showed excellent methanol tolerance and long-term stability. The enhanced ORR electrocatalytic performance is attributed to the strong synergetic effect between Cu(II)-N ligands and Cu0 NPs, sufficient active sites, and fast mass transfer.