Structurally tuned lead magnesium titanate perovskite as a photoelectrode material for enhanced photoelectrochemical water splitting

Sundaram Chandrasekaran, Eui Jung Kim, Jin Suk Chung, Ik Keun Yoo, Velusamy Senthilkumar, Yong Soo Kim, Chris R. Bowen, Vaia Adamaki, Seung Hyun Hur

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Abstract

This is the first demonstration of four distinct types of Lead Magnesium Titanate (PMT) perovskites including spheres, flakes, hierarchical flower and thin microbelt shapes that were finely tuned via facile solution method to develop cost effective and high performance photoanode materials for water splitting. The influence of solvent effects during structural tuning, purity, morphology, optical absorption, structural phase transition and stoichiometric formation of the prepared Lead Magnesium Titanate perovskites has been discussed in detail. A remarkable observation is that the thin microbelts structured PMT perovskite (PMTT) exhibited an excellent water splitting performance and it is more sensitive to the illuminated visible light. Owing to the unique structural features, the photoconversion efficiency value of PMTT perovskite is ∼3.9, 3.54, 2.85 and 1.52 times higher than those of other prepared PMT perovskites including pristine PbTiO3. The excellent water splitting performance of PMTT (thin microbelts) may be ascribed to the remarkable structural features that include a large surface area, high optical absorbance, more active sites and high interface area of the microbelts, which provide large contact areas between the electrolyte and highly active materials for electrolyte diffusion and a rapid route for charge transfer with minimal diffusion resistance. In addition, each thin microbelt is directly in contact with the Ni foam substrate, which can also shorten the diffusion path for the electrons. The demonstrated approach paves the way for low-cost and high-throughput production of next generation, high performance and highly active water splitting perovskite photocatalysts.

Original languageEnglish
Pages (from-to)682-690
Number of pages9
JournalChemical Engineering Journal
Volume309
DOIs
Publication statusPublished - 1 Feb 2017

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titanate
perovskite
Perovskite
Magnesium
magnesium
Lead
Water
electrolyte
Electrolytes
water
Photocatalysts
phase transition
foam
absorbance
cost
Light absorption
Foams
Charge transfer
Costs
flower

Keywords

  • Lead Magnesium Titanate
  • Microbelt
  • PbTiO
  • Perovskites
  • Water splitting

Cite this

Structurally tuned lead magnesium titanate perovskite as a photoelectrode material for enhanced photoelectrochemical water splitting. / Chandrasekaran, Sundaram; Kim, Eui Jung; Chung, Jin Suk; Yoo, Ik Keun; Senthilkumar, Velusamy; Kim, Yong Soo; Bowen, Chris R.; Adamaki, Vaia; Hyun Hur, Seung.

In: Chemical Engineering Journal, Vol. 309, 01.02.2017, p. 682-690.

Research output: Contribution to journalArticle

Chandrasekaran, Sundaram ; Kim, Eui Jung ; Chung, Jin Suk ; Yoo, Ik Keun ; Senthilkumar, Velusamy ; Kim, Yong Soo ; Bowen, Chris R. ; Adamaki, Vaia ; Hyun Hur, Seung. / Structurally tuned lead magnesium titanate perovskite as a photoelectrode material for enhanced photoelectrochemical water splitting. In: Chemical Engineering Journal. 2017 ; Vol. 309. pp. 682-690.
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AU - Senthilkumar, Velusamy

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