Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 4, Pages 1341-1348Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ta00680d
Keywords
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Funding
- 863 Program [2009AA03Z220]
- NSFC [50773008, 51273032]
- Shaanxi Provincial Department of Education [2010JK655]
- Sci-Tech R&D Program of Shaanxi Province [2010K01-120, 2011JM6010]
- SRF for ROCS, SEM
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Hafnium oxygen nitride binary/ternary nanocomposites were prepared by combining Hf7O8N4, HfO2, and amorphous carbon through a simple chemical synthesis. The obtained HfO2 (Hf-R0-U), HfO2-C (Hf-R5-B), and Hf7O8N4-HfO2-C (Hf-R12-T) were characterized by XRD, SEM, FESEM, and electrochemical measurements. Dye-sensitized solar cells (DSCs) with binary Hf-R5-B and ternary Hf-R12-T composites as counter electrode (CE) showed superior electrocatalytic activity for I-3(-) reduction and high power conversion efficiencies (PCE) of 6.71% and 7.85%, respectively, matching the performance of DSCs with Pt CE (7.19%). The design strategy demonstrated is promising for fabricating highly efficient and low-cost composite CE catalysts for DSCs.
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