Modeling an integrated photoelectrolysis system sustained by water vapor

Chengxiang Xiang, Yikai Chen, Nathan S Lewis

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Two designs for an integrated photoelectrolysis system sustained by water vapor have been investigated using a multi-physics numerical model that accounts for charge and species conservation, electron and ion transport, and electrochemical processes. Both designs leverage the use of a proton-exchange membrane that provides conductive pathways for reactant/product transport and prevents product crossover. The resistive losses, product gas transport, and gas crossovers as a function of the geometric parameters of the two designs have been evaluated systematically. In these designs, minimization of pathways in the membrane that can support the diffusive transport of product gases from the catalyst to the gas-collecting chamber was required to prevent supersaturation of hydrogen or oxygen gases at the Nafion/catalyst interface. Due to the small, thin membrane layer that was required, a small electrode width (

Original languageEnglish
Pages (from-to)3713-3721
Number of pages9
JournalEnergy and Environmental Science
Volume6
Issue number12
DOIs
Publication statusPublished - Dec 2013

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Steam
Water vapor
water vapor
Gases
membrane
gas
modeling
Membranes
catalyst
gas transport
species conservation
supersaturation
Catalysts
Supersaturation
electrode
physics
hydrogen
Protons
Numerical models
Hydrogen

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry
  • Pollution
  • Nuclear Energy and Engineering

Cite this

Modeling an integrated photoelectrolysis system sustained by water vapor. / Xiang, Chengxiang; Chen, Yikai; Lewis, Nathan S.

In: Energy and Environmental Science, Vol. 6, No. 12, 12.2013, p. 3713-3721.

Research output: Contribution to journalArticle

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