Abstract
A CoS microtube electrode catalyses hydrogen evolution efficiently in both neutral and basic aqueous electrolyte solutions. The microtubular CoS electrode was also combined with a hematite photoanode to give a photoelectrochemical water splitting cell.
Highlights
Photoelectrochemical (PEC) water splitting is a promising approach to convert intermittent sunlight into a storable and renewable chemical fuel, H2.1 The success of clean water splitting systems will rely on the development of a device consisting of robust, efficient, inexpensive, and environmentally benign components, and on the compatibility of the catalysts and light absorbers in an integrated system
The difference in the hydrogen evolution reaction (HER) activity of these cobalt species could be attributed to the difference in chemical composition, amount of Co loaded on the electrode, and surface morphology
At this electrochemical screening stage, we only investigated the effects of chemical composition in more detail
Summary
Photoelectrochemical (PEC) water splitting is a promising approach to convert intermittent sunlight into a storable and renewable chemical fuel, H2.1 The success of clean water splitting systems will rely on the development of a device consisting of robust, efficient, inexpensive, and environmentally benign components, and on the compatibility of the catalysts and light absorbers in an integrated system. An array of layered hydroxide cobalt carbonate acicular nanorods (FTO| nanoLHCC) was rst grown onto an FTO substrate in water containing CoCl2 and urea at 90 C for 4 h, followed by its conversion into a CoS microtube array (FTO|microCoS) via CBD at 90 C for 6 h (see Experimental section).
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