Nitrogen and Sulfur Dual Self-Doped Graphitic Carbon with Highly Catalytic Activity for Oxygen Reduction Reaction

Jinhui Tong, Wenyan Li, Jiangping Ma, Wenhui Wang, Lili Bo, Ziqiang Lei, Abdulla Azzam Mahboob

2018

Data confidence 70 medium

How this score is calculated

It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.

Abstract

The use of heteroatom-doped carbon materials in the oxygen reduction reaction (ORR) continues to be an attractive alternative to Pt-based catalyst. In this work, nitrogen and sulfur dual self-doped hierarchically micro- and mesoporous graphitic carbon catalyst was prepared by pyrolysis of methyl orange (Fe (III)) complex, followed by removing the metal species in acid. The catalyst shows high electrocatalytic activity, long-term stability and tolerance for methanol in both acidic and alkaline media. Especially, the catalyst exhibits superior ORR electrocatalytic activity than that of the commercial Pt/C (20 wt %) in 0.1 M KOH: 0.962 and 0.865 V (vs RHE) of onset and half-wave potential was obtained, which is 8/22 mV positive than that for Pt/C, respectively. Additionally, the catalyst exhibits much greater stability than Pt/C. Kinetics investigations show that the catalyst follows the efficient 4-electron pathway for ORR in both the alkaline and acidic electrolyte.