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Enabling small band-gap semiconductors for solar water oxidation using multifunctional NiOx coating

Sun, Ke and Saadi, Fadl H. and Kuang, Yanjin and McDowell, Matthew T. and Zhou, Xinghao and Verlage, Erik and Friedrich, Dennis and Brunschwig, Bruce S. and Tu, Charles W. and Lewis, Nathan S. (2015) Enabling small band-gap semiconductors for solar water oxidation using multifunctional NiOx coating. In: 250th American Chemical Society National Meeting & Exposition, August 16-20, 2015, Boston, MA. https://resolver.caltech.edu/CaltechAUTHORS:20150923-083052914

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Abstract

Technol. important small band gap (< 2 eV) semiconductors must be stabilized against corrosion or passivation in aq. electrolytes before they can be used as photoelectrodes that directly produce fuels from sunlight. In addn., incorporation of electrocatalysts on the surface of the photoelectrodes is required for efficient oxidn. of H_2O to O_2(g) and redn. of H_2O or H_2O and CO_2 to fuels. Stabilization of technol. important semiconductors against photocorrosion and photopassivation would have a significant impact on photoelectrochem. energy conversion, and could enable the development of a new generation of robust integrated devices for efficient solar-driven water splitting and solar-driven CO_2 redn. Previous efforts have been extensively dedicated on elongating the lifetime of semiconductors under harsh fuel forming reaction conditions esp. during the water oxidn. half reaction. To date, the energy conversion performances and stability were limited on these systems, obscuring the realization of integrated solar fuel devices. In this work, we presented our recent effort on prepn. of a multifunctional coating using Ni oxide, which provides multiple important functions on semiconductor photoelectrodes surfaces, including chem./corrosion protection, elec. conducting, optical transparent/antireflective, and inherent electrocatalytic activity.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
http://www.acs.org/content/acs/en/meetings/fall-2015.htmlOrganizationConference Website
ORCID:
AuthorORCID
Sun, Ke0000-0001-8209-364X
Saadi, Fadl H.0000-0003-3941-0464
Zhou, Xinghao0000-0001-9229-7670
Brunschwig, Bruce S.0000-0002-6135-6727
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 2015 American Chemical Society.
Record Number:CaltechAUTHORS:20150923-083052914
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150923-083052914
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60437
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Sep 2015 16:22
Last Modified:03 Oct 2019 08:57

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