High performance heteroatoms quaternary-doped carbon catalysts derived from Shewanella bacteria for oxygen reduction

Zhaoyan Guo, Guangyuan Ren, Congcong Jiang, Xianyong Lu, Ying Zhu, Lei Jiang, Liming Dai

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43 Citations (Scopus)

Abstract

A novel heteroatoms (N, P, S and Fe) quaternary-doped carbon (HQDC-X, X refers to the pyrolysis temperature) can be fabricated by directly pyrolyzing a gram-negative bacteria, S. oneidensis MR-1 as precursors at 800 degrees C, 900 degrees C and 1000 degrees C under argon atmosphere. These HQDC-X catalysts maintain the cylindrical shape of bacteria after pyrolysis under high temperatures, while heteroatoms including N, P, S and Fe distribute homogeneously on the carbon frameworks. As a result, HQDC-X catalysts exhibit excellent electrocatalytic activity for ORR via a dominant four-electron oxygen reduction pathway in alkaline medium, which is comparable with that of commercial Pt/C. More importantly, HQDC-X catalysts show better tolerance for methanol crossover and CO poisoning effects, long-term durability than commercial Pt/C, which could be promising alternatives to costly Pt-based electrocatalysts for ORR. The method may provide a promising avenue to develop cheap ORR catalysts from inexpensive, scalable and biological recursors
Original languageEnglish
Article number17064
Number of pages10
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 25 Nov 2015
Externally publishedYes

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