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Identification of optimal solar fuel electrocatalysts via high throughput in situ optical measurements

Shinde, Aniketa and Guevarra, Dan and Haber, Joel A. and Jin, Jian and Gregoire, John M. (2015) Identification of optimal solar fuel electrocatalysts via high throughput in situ optical measurements. Journal of Materials Research, 30 (3). pp. 442-450. ISSN 0884-2914. https://resolver.caltech.edu/CaltechAUTHORS:20150327-092659678

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Abstract

Many solar fuel generator designs involve illumination of a photoabsorber stack coated with a catalyst for the oxygen evolution reaction (OER). In this design, impinging light must pass through the catalyst layer before reaching the photoabsorber(s), and thus optical transmission is an important function of the OER catalyst layer. Many oxide catalysts, such as those containing elements Ni and Co, form oxide or oxyhydroxide phases in alkaline solution at operational potentials that differ from the phases observed in ambient conditions. To characterize the transparency of such catalysts during OER operation, 1031 unique compositions containing the elements Ni, Co, Ce, La, and Fe were prepared by a high throughput inkjet printing technique. The catalytic current of each composition was recorded at an OER overpotential of 0.33 V with simultaneous measurement of the spectral transmission. By combining the optical and catalytic properties, the combined catalyst efficiency was calculated to identify the optimal catalysts for solar fuel applications within the material library. The measurements required development of a new high throughput instrument with integrated electrochemistry and spectroscopy measurements, which enables various spectroelectrochemistry experiments.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1557/jmr.2014.296DOIArticle
http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9561478&fileId=S0884291414002969PublisherArticle
ORCID:
AuthorORCID
Shinde, Aniketa0000-0003-2386-3848
Guevarra, Dan0000-0002-9592-3195
Haber, Joel A.0000-0001-7847-5506
Gregoire, John M.0000-0002-2863-5265
Additional Information:© 2014 Materials Research Society. Received 26 July 2014; accepted 25 September 2014. This manuscript is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy (Award No. DE-SC0004993). The authors thank Ryan R.J. Jones for assistance with preparation of graphics.
Group:JCAP
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Subject Keywords:combinatorial synthesis; optical properties; catalytic
Issue or Number:3
Record Number:CaltechAUTHORS:20150327-092659678
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150327-092659678
Official Citation:Aniketa Shinde, Dan Guevarra, Joel A. Haber, Jian Jin and John M. Gregoire (2015). Identification of optimal solar fuel electrocatalysts via high throughput in situ optical measurements. Journal of Materials Research, 30, pp 442-450. doi:10.1557/jmr.2014.296.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:56170
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:27 Mar 2015 19:01
Last Modified:09 Mar 2020 13:18

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