Confined polyaniline derived mesoporous carbon for oxygen reduction reaction

Enhancing the Catalytic Activity of Zeolitic Imidazolate Framework‐8‐Derived N‐Doped Carbon with Incorporated CeO2 Nanoparticles in the Oxygen Reduction Reaction

“…Although it has al ower specific surfacea rea than N-C-900, CeO 2 @N-C-900 has am uch uniform mesoporouss tructure compared with N-C-900 and the other two materials (Figure 7b), which is beneficial to kinetic mass transport during the ORR. [17] On the other hand, the presence of Ce 3 + accompanied by oxygen vacancies can enhancet he ORR catalytic activity of ZIF-8-derived carbon. Comparedw ith pure CeO 2 ,t he Ce 3 + contenti nC eO 2 @N-C-900 is greatly increased owing to the reductive environmentd uring the carbonization process (36 vs. 10 %).…”

“…Although it has a lower specific surface area than N‐C‐900, CeO 2 @N‐C‐900 has a much uniform mesoporous structure compared with N‐C‐900 and the other two materials (Figure b), which is beneficial to kinetic mass transport during the ORR . On the other hand, the presence of Ce 3+ accompanied by oxygen vacancies can enhance the ORR catalytic activity of ZIF‐8‐derived carbon.…”

Co‐N‐doped hierarchically ordered macro/mesoporous carbon as bifunctional electrocatalyst toward oxygen reduction/evolution reactions

“…The ORR activity is evaluated by onset potential (E onset ) and half-wave potential (E 1/2 ). As shown in Figure 6A, OMC and N-OMC exhibited limited activities at 1600 rpm, while Co-N-3DOM/mC displayed high ORR performance (E onset = 0.95 V, E 1/2 = 0.85 V), outperformed Co-N-OMC (E onset = 0.92 V, E 1/2 = 0.80 V) and many reported nonprecious catalysts, [50][51][52][53] as reviewed through the recent work (Table S3), even outperformed Pt/C (E onset = 0.95 V, E 1/2 = 0.83 V). The resulting Co-N-3DOM/mC presented a greater kinetic current density (J k ) at 0.8 V (11.44 mA/cm 2 ) and smaller Tafel slope (70.5 mV/dec) compared with that of 20 wt% Pt/C (J k of 5.98 mA/cm 2 and Tafel slope of 82.2 mV/dec, respectively) and other carbon-based catalysts ( Figure S3, Figure 6B), suggesting that Co-N-3DOM/mC possesses more efficient ORR kinetics process.…”

Recent Advance on Polyaniline or Polypyrrole-Derived Electrocatalysts for Oxygen Reduction Reaction

“…The obtained material shows a high surface area of 1341.12 m 2 g −1 and high N content. PANI-derived mesoporous carbon was obtained based on yolk-shell nanostructured polyaniline@SiO 2 particles [38], and the SiO 2 particles were used as the hard template. The electrocatalyst presented high stability and tolerance to CH 3 OH.…”