@article{4a3fae263fce4b7bb055118d987f500b,
title = "Nanoscale nickel oxide/nickel heterostructures for active hydrogen evolution electrocatalysis",
abstract = "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 ∼ 20 mAC -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.",
author = "Ming Gong and Wu Zhou and Tsai, {Mon Che} and Jigang Zhou and Mingyun Guan and Lin, {Meng Chang} and Bo Zhang and Yongfeng Hu and Wang, {Di Yan} and Jiang Yang and Pennycook, {Stephen J.} and Hwang, {Bing Joe} and Hongjie Dai",
note = "Funding Information: This work was supported by a Grant from Stanford GCEP, a Steinhart/Reed Award from the Stanford Precourt Institute for Energy and by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award # DOE DE-SC0008684 (for carbon nanomaterials synthesis and characterization with advanced electrical properties). Work at CLS is supported by the NSERC, NRC, CIHR of Canada and the University of Saskatchewan. The electron microscopic study was supported by a Wigner Fellowship through the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S.DOE and through a user project supported by ORNL{\textquoteright}s Center for Nanophase Materials Sciences (CNMS), which is sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. DOE. We thank Dr. Tom Regier for his technical support in collecting Ni L edge data at SGM beamline.",
year = "2014",
month = aug,
day = "22",
doi = "10.1038/ncomms5695",
language = "English",
volume = "5",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Research",
}