Blending Cr2O3 into a NiO-Ni electrocatalyst for sustained water splitting
Abstract
The rising H2 economy demands active and durable electrocatalysts based on low-cost, earth-abundant materials for water electrolysis/photolysis. Here we report nanoscale Ni metal cores over-coated by a Cr2O3-blended NiO layer synthesized on metallic foam substrates. The Ni@NiO/Cr2O3 triphase material exhibits superior activity and stability similar to Pt for the hydrogen-evolution reaction in basic solutions. The chemically stable Cr2O3 is crucial for preventing oxidation of the Ni core, maintaining abundant NiO/Ni interfaces as catalytically active sites in the heterostructure and thus imparting high stability to the hydrogen-evolution catalyst. The highly active and stable electrocatalyst enables an alkaline electrolyzer operating at 20 mA cm–2 at a voltage lower than 1.5 V, lasting longer than 3 weeks without decay. Thus, the non-precious metal catalysts afford a high efficiency of about 15 % for light-driven water splitting using GaAs solar cells.
- Authors:
-
- Stanford Univ., Stanford, CA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Alta Devices, Sunnyvale, CA (United States)
- Stanford Univ., Stanford, CA (United States); Hunan Univ., Changsha (China)
- Stanford Univ., Stanford, CA (United States); Industrial Technology Research Institute, Hsinchu (Taiwan, ROC)
- Stanford Univ., Stanford, CA (United States); Taiwan Normal Univ., Taipei (Taiwan, ROC)
- National Taiwan Univ. of Science and Technology, Taipei (Taiwan, ROC)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1224748
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Angewandte Chemie (International Edition)
- Additional Journal Information:
- Journal Name: Angewandte Chemie (International Edition); Journal Volume: 54; Journal Issue: 41; Journal ID: ISSN 1433-7851
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 08 HYDROGEN
Citation Formats
Gong, Ming, Zhou, Wu, Kenney, Michael James, Kapusta, Rich, Cowley, Sam, Wu, Yingpeng, Lu, Bingan, Lin, Meng -Chang, Wang, Di -Yan, Yang, Jiang, Hwang, Bing -Joe, and Dai, Hongjie. Blending Cr2O3 into a NiO-Ni electrocatalyst for sustained water splitting. United States: N. p., 2015.
Web. doi:10.1002/anie.201504815.
Gong, Ming, Zhou, Wu, Kenney, Michael James, Kapusta, Rich, Cowley, Sam, Wu, Yingpeng, Lu, Bingan, Lin, Meng -Chang, Wang, Di -Yan, Yang, Jiang, Hwang, Bing -Joe, & Dai, Hongjie. Blending Cr2O3 into a NiO-Ni electrocatalyst for sustained water splitting. United States. https://doi.org/10.1002/anie.201504815
Gong, Ming, Zhou, Wu, Kenney, Michael James, Kapusta, Rich, Cowley, Sam, Wu, Yingpeng, Lu, Bingan, Lin, Meng -Chang, Wang, Di -Yan, Yang, Jiang, Hwang, Bing -Joe, and Dai, Hongjie. Mon .
"Blending Cr2O3 into a NiO-Ni electrocatalyst for sustained water splitting". United States. https://doi.org/10.1002/anie.201504815. https://www.osti.gov/servlets/purl/1224748.
@article{osti_1224748,
title = {Blending Cr2O3 into a NiO-Ni electrocatalyst for sustained water splitting},
author = {Gong, Ming and Zhou, Wu and Kenney, Michael James and Kapusta, Rich and Cowley, Sam and Wu, Yingpeng and Lu, Bingan and Lin, Meng -Chang and Wang, Di -Yan and Yang, Jiang and Hwang, Bing -Joe and Dai, Hongjie},
abstractNote = {The rising H2 economy demands active and durable electrocatalysts based on low-cost, earth-abundant materials for water electrolysis/photolysis. Here we report nanoscale Ni metal cores over-coated by a Cr2O3-blended NiO layer synthesized on metallic foam substrates. The Ni@NiO/Cr2O3 triphase material exhibits superior activity and stability similar to Pt for the hydrogen-evolution reaction in basic solutions. The chemically stable Cr2O3 is crucial for preventing oxidation of the Ni core, maintaining abundant NiO/Ni interfaces as catalytically active sites in the heterostructure and thus imparting high stability to the hydrogen-evolution catalyst. The highly active and stable electrocatalyst enables an alkaline electrolyzer operating at 20 mA cm–2 at a voltage lower than 1.5 V, lasting longer than 3 weeks without decay. Thus, the non-precious metal catalysts afford a high efficiency of about 15 % for light-driven water splitting using GaAs solar cells.},
doi = {10.1002/anie.201504815},
journal = {Angewandte Chemie (International Edition)},
number = 41,
volume = 54,
place = {United States},
year = {Mon Aug 24 00:00:00 EDT 2015},
month = {Mon Aug 24 00:00:00 EDT 2015}
}
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