NDLI: Anodic deposition of NiO<sub><i>x</i></sub> water oxidation catalysts from macrocyclic nickel(ii) complexes

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Catalysis Science & Technology Vol - 3 Issue - 6

Catalysis Science & Technology Vol - 3 Issue - 5

Catalysis Science & Technology Vol - 3 Issue - 4

Catalysis Science & Technology Vol - 3 Issue - 3

Catalysis Science & Technology Vol - 3 Issue - 2

Catalysis Science & Technology Vol -2

Catalysis Science & Technology Vol -1

Anodic deposition of NiO_x water oxidation catalysts from macrocyclic nickel(ii) complexes

Content Provider	Royal Society of Chemistry (RSC)
Author	Hocking, Rosalie K. Chang, Shery L. Y. Spiccia, Leone Bach, Udo Singh, Archana
Copyright Year	2013
Abstract	Molecular complexes have been found to be excellent precursors for the deposition of catalytically active metal oxide films. Here, three macrocyclic Ni(II) amine complexes have been used for the electrochemical deposition of NiOx films from either a borate buffer solution (pH 9.2) or more basic conditions (pH = 12.9). The cyclic voltammetry of the complexes in both electrolytes shows very similar features and indicates the deposition of a catalytically active nickel oxide film. The NiOx films have been characterised using infrared (IR) and Raman spectroscopy complemented by scanning electron microscopy. Testing of the water oxidation activity at pH 9.2 and 12.9 showed that the films deposited from macrocyclic Ni(II) complexes exhibit similar catalytic activity to those derived from Ni2+ salts. The macrocyclic complexes offer the advantage of greater solubility and solution stability over a wider range of deposition conditions. At pH 9.2, the catalytic activity of the NiOx films was significantly higher when using a borate buffer and, in addition, the films were more active at pH 12.9 than at pH 9.2. The NiOx films deposited from molecular complexes were also found to show electrochromic properties. The oxidation of water by these films was enhanced by visible light. Water oxidation currents were observed to increase by ∼20% under simulated solar radiation.
Starting Page	1725
Ending Page	1732
Page Count	8
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	3
Issue Number	7
Journal	Catalysis Science & Technology
DOI	10.1039/c3cy00017f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cyclic voltammetry Infrared spectroscopy Electrochemistry PH Sunlight Raman Nickel Electrochromism Borate Buffer solution Raman spectroscopy Scanning electron microscope
Content Type	Text
Resource Type	Article
Subject	Catalysis

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