| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Univ Fed ABC, CCNH, Av Estados 5001, BR-09210580 Santo Andre, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | CERAMICS INTERNATIONAL; v. 44, n. 18, p. 22983-22990, DEC 15 2018. |
| Web of Science Citations: | 1 |
| Abstract | |
This work describes a multilayer tungsten oxide photoanode synthesized via facile dip-coating deposition solution for sunlight-driven water oxidation reaction. The number of layers (three, five and ten) followed by a successive annealing process at each deposited layer has strongly influenced their performance. The ten-layers tungsten oxide photoanode exhibited the highest photocurrent density around 0.7 mA/cm(2) at 1.23 V-RHE, under sunlight irradiation. This photocurrent response corresponds to 17% of solar-to-hydrogen conversion efficiency (STH) from the maximum theoretical predicted for tungsten oxide (4.8%). The successive annealing treatment promoted a reduction in the number of grain boundaries, yielding in higher film porosity and surface roughness, which decreased the charge transfer resistance and the electron-hole recombination rate. (AU) | |
| FAPESP's process: | 17/02317-2 - Interfaces in materials: electronic, magnetic, structural and transport properties |
| Grantee: | Adalberto Fazzio |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |