Enhanced photoelectrochemical activity of Co-doped β-In 2 S 3 nanoflakes as photoanodes for water splitting.

Authors :: Pulipaka S
Koushik AKS
Deepa M
Meduri P
Source :: RSC advances [RSC Adv] 2019 Jan 11; Vol. 9 (3), pp. 1335-1340. Date of Electronic Publication: 2019 Jan 11 (Print Publication: 2019).
Publication Year :: 2019
Abstract: This work is primarily focused on indium sulfide (β-In <subscript>2</subscript> S <subscript>3</subscript> ) and cobalt (Co)-doped β-In <subscript>2</subscript> S <subscript>3</subscript> nanoflakes as photoanodes for water oxidation. The incorporation of cobalt introduces new dopant energy levels increasing visible light absorption and leading to improved photo-activity. In addition, cobalt ion centers in β-In <subscript>2</subscript> S <subscript>3</subscript> act as potential catalytic sites to promote electro-activity. 5 mol% Co-doped β-In <subscript>2</subscript> S <subscript>3</subscript> nanoflakes when tested for photoelectrochemical water splitting exhibited a photocurrent density of 0.69 mA cm <superscript>-2</superscript> at 1.23 V, much higher than that of pure β-In <subscript>2</subscript> S <subscript>3</subscript> .<br />Competing Interests: There are no conflicts to declare.<br /> (This journal is © The Royal Society of Chemistry.)

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