Novel methanol-tolerant Ir–S/C chalcogenide electrocatalysts for oxygen reduction in DMFC fuel cell--颗粒学报PARTICUOLOGY

Ma, J., Ai, D., Xie, X., & Guo, J. (2011). Novel methanol-tolerant Ir–S/C chalcogenide electrocatalysts for oxygen reduction in DMFC fuel cell. Particuology, 9(2), 155-160. https://doi.org/10.1016/j.partic.2010.05.015

Novel methanol-tolerant Ir–S/C chalcogenide electrocatalysts for oxygen reduction in DMFC fuel cell

Jingyu Ma, Desheng Ai^*, Xiaofeng Xie, Jianwei Guo

Institute of Nuclear & New Energy Technology, Tsinghua University, Beijing 100084, China

10.1016/j.partic.2010.05.015

Volume 9, Issue 2, April 2011, Pages 155-160

Received 2 December 2009, Revised 23 April 2010, Accepted 21 May 2010, Available online 10 February 2011.

E-mail: ai_desh@tsinghua.edu.cn

Highlights

Abstract

Novel methanol-tolerant oxygen-reduction catalysts, iridium–sulphur (Ir–S) chalcogenides with different Ir/S atomic ratios, were synthesized via a precipitation method using H₂IrCl₆ and Na₂SO₃ as the Ir and S precursors. Powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to characterize the Ir_xS_1−x/C chalcogenide catalysts. Particle size ranging from 2.5 to 2.8 nm though obvious agglomeration was found on carbon support. However, these chalcogenide catalysts showed strong catalytic activity towards the oxygen reduction reaction (ORR) and high methanol tolerance, strongly suggesting these novel catalysts as promising candidates for direct methanol fuel cell (DMFC) cathode applications.

Graphical abstract

Keywords

DMFC; Iridium; Sulphur; Cathodic catalyst; Oxygen reduction; Methanol tolerant

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