A reliable aerosol-spray-assisted approach to produce and optimize amorphous metal oxide catalysts for electrochemical water splitting

Long Kuai; Jing Geng; Changyu Chen; Erjie Kan; Yadong Liu; Qing Wang; Baoyou Geng

doi:10.1002/anie.201404208

A reliable aerosol-spray-assisted approach to produce and optimize amorphous metal oxide catalysts for electrochemical water splitting

Angew Chem Int Ed Engl. 2014 Jul 14;53(29):7547-51. doi: 10.1002/anie.201404208. Epub 2014 Jun 4.

Authors

Long Kuai¹, Jing Geng, Changyu Chen, Erjie Kan, Yadong Liu, Qing Wang, Baoyou Geng

Affiliation

¹ College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Center for Nano Science and Technology, Anhui Normal University, Wuhu 241000 (P. R. China).

PMID: 24899118
DOI: 10.1002/anie.201404208

Abstract

An aerosol-spray-assisted approach (ASAA) is proposed and confirmed as a precisely controllable and continuous method to fabricate amorphous mixed metal oxides for electrochemical water splitting. The proportion of metal elements can be accurately controlled to within (5±5) %. The products can be sustainably obtained, which is highly suitable for industrial applications. ASAA was used to show that Fe6Ni10O(x) is the best catalyst among the investigated Fe-Ni-O(x) series with an overpotential of as low as 0.286 V (10 mA cm(-2)) and a Tafel slope of 48 mV/decade for the electrochemical oxygen evolution reaction. Therefore, this work contributes a versatile, continuous, and reliable way to produce and optimize amorphous metal oxide catalysts.

Keywords: aerosol sprays; heterogeneous catalysis; metal oxides; oxygen evolution reaction; water splitting.