期刊
NANO LETTERS
卷 16, 期 4, 页码 2268-2277出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b04496
关键词
3D aerogel; hybrid nanosheets; photoanode; photoelectrochemical water splitting
类别
资金
- U.S. Department of Energy [DE-EE0003208]
- Research Growth Initiative Program of the University of Wisconsin-Milwaukee (UWM)
- ERC
Developing photoanodes with efficient sunlight harvesting, excellent charge separation and transfer, and fast surface reaction kinetics remains a key challenge in photo electrochemical water splitting devices. Here we report a new strongly coupled ternary hybrid aerogel that is designed and constructed by in situ assembly of N-deficient porous carbon nitride nanosheets and NiFe-layered double hydroxide into a 3D N-doped graphene framework architecture using a facile hydrothermal method. Such a 3D hierarchical structure combines several advantageous features, including effective light-trapping, multidimensional electron transport pathways, short charge transport time and distance, strong coupling effect, and improved surface reaction kinetics. Benefiting from the desirable nanostructure, the ternary hybrid aerogels exhibited remarkable photoelectrochemical performance for water oxidation. Results included a record-high photocurrent density that reached 162.3 mu A cm(-2) at 1.4 V versus the reversible hydrogen electrode with a maximum incident photon-to-current efficiency of 2.5% at 350 nm under AM 1.5G irradiation, and remarkable photostability. The work represents a significant step toward the development of novel 3D aerogel-based photoanodes for solar water splitting.
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