Effective Construction of High-quality Iron Oxy-hydroxides and Co-doped Iron Oxy-hydroxides Nanostructures

Towards the Promising Oxygen Evolution Reaction Application

Xinyu Zhang, Li An, Jie Yin, Pinxian Xi, Zhiping Zheng, Yaping Du

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Rational design of high efficient and low cost electrocatalysts for oxygen evolution reaction (OER) plays an important role in water splitting. Herein, a general gelatin-assisted wet chemistry method is employed to fabricate well-defined iron oxy-hydroxides and transitional metal doped iron oxy-hydroxides nanomaterials, which show good catalytic performances for OER. Specifically, the Co-doped iron oxy-hydroxides (Co 0.54 Fe 0.46 OOH) show the excellent electrocatalytic performance for OER with an onset potential of 1.52 V, tafel slope of 47 mV/dec and outstanding stability. The ultrahigh oxygen evolution activity and strong durability, with superior performance in comparison to the pure iron oxy-hydroxide (FeOOH) catalysts, originate from the branch structure of Co 0.54 Fe 0.46 OOH on its surface so as to provide many active edge sites, enhanced mass/charge transport capability, easy release oxygen gas bubbles, and strong structural stability, which are advantageous for OER. Meanwhile, Co-doping in FeOOH nanostructures constitutes a desirable four-electron pathway for reversible oxygen evolution and reduction, which is potentially useful for rechargeable metal-air batteries, regenerative fuel cells, and other important clean energy devices. This work may provide a new insight into constructing the promising water oxidation catalysts for practical clean energy application.

Original languageEnglish (US)
Article number43590
JournalScientific Reports
Volume7
DOIs
StatePublished - Mar 8 2017

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Hydroxides
Nanostructures
Iron
Oxygen
Regenerative fuel cells
Metals
Catalysts
Water
Electrocatalysts
Gelatin
Nanostructured materials
Charge transfer
Fuel cells
Durability
Gases
Doping (additives)
Oxidation
Electrons

ASJC Scopus subject areas

  • General

Cite this

Effective Construction of High-quality Iron Oxy-hydroxides and Co-doped Iron Oxy-hydroxides Nanostructures : Towards the Promising Oxygen Evolution Reaction Application. / Zhang, Xinyu; An, Li; Yin, Jie; Xi, Pinxian; Zheng, Zhiping; Du, Yaping.

In: Scientific Reports, Vol. 7, 43590, 08.03.2017.

Research output: Contribution to journalArticle

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