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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Photoactive multilayer WO3 electrode synthesized via dip-coating

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Author(s):
Ferrari, Victoria C. [1] ; Dupim, Ivaldete S. [1] ; Sousa, Vinicius [1] ; Souza, Flavio L. [1]
Total Authors: 4
Affiliation:
[1] Univ Fed ABC, CCNH, Av Estados 5001, BR-09210580 Santo Andre, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: CERAMICS INTERNATIONAL; v. 44, n. 18, p. 22983-22990, DEC 15 2018.
Web of Science Citations: 0
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 type: Research Projects - Thematic Grants
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC