Journal
NATURE COMMUNICATIONS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms5695
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Funding
- Stanford GCEP
- Stanford Precourt Institute for Energy
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DOE DE-SC0008684]
- NSERC
- NRC
- CIHR of Canada
- University of Saskatchewan
- Laboratory Directed Research and Development Program of Oak Ridge National Laboratory
- ORNL's Center for Nanophase Materials Sciences (CNMS)
- Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. DOE
- U.S. Department of Energy (DOE) [DE-SC0008684] Funding Source: U.S. Department of Energy (DOE)
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Active, stable and cost-effective electrocatalysts are a key to water splitting for hydrogen production through electrolysis or photoelectrochemistry. Here we report nanoscale nickel oxide/nickel heterostructures formed on carbon nanotube sidewalls as highly effective electrocatalysts for hydrogen evolution reaction with activity similar to platinum. Partially reduced nickel interfaced with nickel oxide results from thermal decomposition of nickel hydroxide precursors bonded to carbon nanotube sidewalls. The metal ion-carbon nanotube interactions impede complete reduction and Ostwald ripening of nickel species into the less hydrogen evolution reaction active pure nickel phase. A water electrolyzer that achieves similar to 20 mA cm(-2) at a voltage of 1.5V, and which may be operated by a single-cell alkaline battery, is fabricated using cheap, non-precious metal-based electrocatalysts.
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