An Integrated Photoelectrochemical–Chemical Loop for Solar‐Driven Overall Splitting of Hydrogen Sulfide1. Issue 17 (26th March 2014)

• Record Type: Journal Article
• Authors: Zong, Xu; Han, Jingfeng; Seger, Brian; Chen, Hongjun; Lu, Gaoqing (Max); Li, Can; Wang, Lianzhou
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 17(2014)
• Page Start: 4399
• Page End: 4403
• Publication Date: 2014-03-26
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201400571
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Abundant and toxic hydrogen sulfide (H₂S) from industry and nature has been traditionally considered a liability. However, it represents a potential resource if valuable H₂ and elemental sulfur can be simultaneously extracted through a H₂S splitting reaction. Herein a photochemical‐chemical loop linked by redox couples such as Fe²⁺/Fe³⁺ and I⁻/I₃⁻ for photoelectrochemical H₂ production and H₂S chemical absorption redox reactions are reported. Using functionalized Si as photoelectrodes, H₂S was successfully split into elemental sulfur and H₂ with high stability and selectivity under simulated solar light. This new conceptual design will not only provide a possible route for using solar energy to convert H₂S into valuable resources, but also sheds light on some challenging photochemical reactions such as CH₄ activation and CO₂ reduction.</p> </abstract>