Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 138, Issue 12, Pages 3954-3957Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b12758
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Funding
- Ministry of Science and Technology of China [2014CB239402, 2013CB834505, 2013CB834804]
- National Natural Science Foundation of China [91427303, 21390404, 51432002, 51373193]
- Key Research Programme of the Chinese Academy of Science [KGZD-EW-T05]
- Chinese Academy of Science
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Graphdiyne (GDY), a novel large pi-conjugated carbon material, for the first time, is introduced as the hole transfer layer into a photoelectrochemical water splitting. cell (PEC). Raman and ultraviolet photoelectron spectroscopic studies indicate the existence of relatively strong pi-pi interactions between GDY and 4-mercaptopyridine surface-functionalized CdSe quantum dots, beneficial to the hole transportation and enhancement of the photocurrent performance. Upon exposure to a Xe lamp, the integrated photocathode produces a current density of nearly -70 mu A cm(-2) at a potential of 0 V vs NHE in neutral aqueous solution. Simultaneously, the photocathode evolves H-2 with 90 +/- 5% faradic efficiency over three times and exhibits good stability within 12 h. All of the results indicate that GDY is a promising hole transfer material to fabricate a PEC device for water splitting by solar energy.
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