期刊
NANO ENERGY
卷 31, 期 -, 页码 456-461出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.11.048
关键词
Platinum-nickel hydroxide nanocomposites; Hydrogen evolution reaction; Water electrolysis; Two-dimenstional nickel hydroxide nanosheets
类别
资金
- Key Project of National Natural Science Foundation of China [21433012]
- National Basic Research Program of China [2013CB933000]
- National Natural Science Foundation of China [21273270]
- Natural Science Foundation of Jiangsu Province [BK20130007]
- National Science Foundation, USA [DMR 1410175, CBET 1437219]
- JHU Catalyst Award
- DOE Early Career Award from the Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy [DE-SC0010379]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [E-AC02-06CH11357]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1437219] Funding Source: National Science Foundation
Water electrolysis represents a promising solution for storage of renewable but intermittent electrical energy in hydrogen molecules. This technology is however challenged by the lack of efficient electrocatalysts for the hydrogen and oxygen evolution reactions. Here we report on the synthesis of platinum-nickel hydroxide nanocomposites and their electrocatalytic applications for water reduction. An in situ reduction strategy taking advantage of the Ni(H)/Ni(III) redox has been developed to enable and regulate the overgrowth of Pt nanocrystals on single-layer Ni(OH)(2) nanosheets. The obtained nanocomposites (denoted as Pt@2D-Ni(OH)(2)) exhibit an improvement factor of 5 in catalytic activity and a reduction of up to 130 mV in overpotential compared to Pt for the hydrogen evolution reaction (HER). A combination of electron microscopy/spectroscopy characterizations, electrochemical studies and density function theory calculations was employed to uncover the structures of the metal-hydroxide interface and understand the mechanisms of catalytic enhancement.
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