Iron-nitrogen-doped mesoporous tungsten carbide nanostructures as oxygen reduction electrocatalysts.

Conference item

Since Pt-based catalysts have the disadvantages of high cost, large overpotential loss, and limited long-term stability, there have been various promising alternatives to Pt-based catalysts to improve the catalytic activity towards the oxygen reduction reaction (ORR). We have synthesized iron-nitrogen-doped mesoporous tungsten carbide catalysts (WC-m-FT) by pyrolysis of well-ordered mesoporous tungsten carbides with iron porphyrin. WC-m-FT exhibits excellent ORR catalytic activity in an alkaline medium, i.e. a high electron-transfer number as well as superior stability and methanol tolerance. The improved activity and stability of WC-m-FT are ascribed to iron-containing catalytic active sites surrounded by nitrogen species and the well-defined mesoporous tungsten carbide structure.

Authors: Moon, J; Lee, Y; Han, S; Kwak, D; Lee, K

• Publication status: Published
• Publisher: Royal Society of Chemistry
• Host title: Physical chemistry chemical physics : PCCP
• Volume: 16
• Issue: 28
• Pages: 14644-14650
• Publication date: 2014-07-01
• Event location: England
• DOI: 10.1039/c4cp01157k
• EISSN: 1463-9084
• ISSN: 1463-9076