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Hybrid photocatalytic water splitting for an expanded range of the solar spectrum with cadmium sulfide and zinc sulfide catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40344 45851 2013 7 PDF Available
Title
Hybrid photocatalytic water splitting for an expanded range of the solar spectrum with cadmium sulfide and zinc sulfide catalysts
Abstract

In this paper, an experimental study of photo-catalytic water splitting with cadmium sulfide and zinc sulfide photo-catalysts is performed in a dual-cell reactor to investigate the effects of radiation intensity and photo-catalyst concentration on hydrogen and oxygen production rates. Hybridization of the photo-catalytic process is examined with multi catalysts and electric potential bias to enhance the productivity of the reactor and sustain the reaction rate. The hydrogen production of 0.41 mmol h−1 with 0.75% (v/v) ZnS is improved by almost 2 times higher than past studies due to illumination of 0.2% (v/v) CdS under 1 sun in a hybrid reactor. The productivity of the reactor is significantly enhanced at light intensities more than 1000 W m−2. The cadmium sulfide catalyst is found to be an inefficient absorbent of light energy, but it shows higher energy and exergy efficiencies compared with ZnS photo-catalysts in a light-driven water splitting process.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (183 K)Download as PowerPoint slideHighlights► We developed a new photo-catalytic and electro-catalytic water splitting systems. ► Hybridization of the photo-catalytic process is examined with multi catalysts. ► Different light intensities and photo-catalyst concentrations are examined. ► CdS shows higher energy and exergy efficiencies compared with ZnS photo-catalysts. ► The hydrogen production of 0.41 mmol h−1 with 3% (w/v) ZnS is improved by almost 2 times due to hybridization.

Keywords
HER, hydrogen evolving reaction; HHV, higher heating value (kJ mol−1); NHE, normal hydrogen electrode; OER, oxygen evolving reaction; UV, ultravioletHydrogen production; Solar energy; Photo-catalysis; Efficiency; Hybridization
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Hybrid photocatalytic water splitting for an expanded range of the solar spectrum with cadmium sulfide and zinc sulfide catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 455, 30 March 2013, Pages 25–31
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us