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High-Throughput Screening for Acid-Stable Oxygen Evolution Electrocatalysts in the (Mn–Co–Ta–Sb)O_x Composition Space

Shinde, Aniketa and Jones, Ryan J. R. and Guevarra, Dan and Mitrovic, Slobodan and Becerra-Stasiewicz, Natalie and Haber, Joel A. and Jin, Jian and Gregoire, John M. (2015) High-Throughput Screening for Acid-Stable Oxygen Evolution Electrocatalysts in the (Mn–Co–Ta–Sb)O_x Composition Space. Electrocatalysis, 6 (2). pp. 229-236. ISSN 1868-2529. doi:10.1007/s12678-014-0237-7.

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Solar generation of fuel is a promising future energy technology, and strong acidic conditions are highly desirable for integrated solar hydrogen generators. In particular, water splitting near pH 0 is attractive due to the availability of high theoretical efficiency, high performance hydrogen evolution catalysts, and robust ion exchange membranes. The lack of a stable, earth-abundant oxygen evolution catalyst inhibits deployment of this technology, and development of such a material is hampered by the strong anti-correlation between electrochemical stability and catalytic activity of non-precious metal oxides. High-throughput screening of mixed metal oxides offers a promising route to the identification of new stable catalysts and requires careful design of experiments to combine the concepts of rapid experimentation and long-term stability. By combining serial and parallel measurement techniques, we have created a high-throughput platform to assess the catalytic activity of material libraries in the as-prepared state and after 2 h of operation. By screening the entire (Mn–Co–Ta–Sb)O_x composition space, we observe that the compositions with highest initial activity comprised cobalt and manganese oxides, but combinations with antimony and tantalum offer improved stability. By combining the desired properties of catalytic activity and stability, the optimal composition regions are readily identified, demonstrating the success and fidelity of this novel high-throughput screening platform.

Item Type:Article
Related URLs:
URLURL TypeDescription ReadCube access
Shinde, Aniketa0000-0003-2386-3848
Jones, Ryan J. R.0000-0002-4629-3115
Guevarra, Dan0000-0002-9592-3195
Mitrovic, Slobodan0000-0001-8913-8505
Haber, Joel A.0000-0001-7847-5506
Gregoire, John M.0000-0002-2863-5265
Alternate Title:High-Throughput Screening for Acid-Stable Oxygen Evolution Electrocatalysts in the (Mn–Co–Ta–Sb)Ox Composition Space
Additional Information:© 2014 Springer Science+Business Media New York. Published online: 7 November 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 Dr. Chengxiang Xiang for assistance with establishing the electrochemical treatment system and Dr. Manuel Soriaga for the illuminating discussions.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Subject Keywords:Solar fuels; Water splitting; High throughput; Oxygen evolution; Electrochemical stability
Issue or Number:2
Record Number:CaltechAUTHORS:20141117-094914554
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Official Citation:Shinde, A., Jones, R.J.R., Guevarra, D. et al. Electrocatalysis (2015) 6: 229. doi:10.1007/s12678-014-0237-7
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51828
Deposited On:17 Nov 2014 20:57
Last Modified:10 Nov 2021 19:16

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