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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.)

Improvement of electrodeposited Sb(2)Se(3)thin film photoelectroactivity by cobalt grain boundary modification

Full text
Author(s):
Costa, Magno Barcelos [1] ; Lucas, Francisco W. S. [2, 3] ; Mascaro, Lucia Helena [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, Rd Washington Luiz Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Colorado, Renewable & Sustainable Energy Inst, Boulder, CO 80309 - USA
[3] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80309 - USA
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF MATERIALS CHEMISTRY A; v. 8, n. 27, p. 13742-13753, JUL 21 2020.
Web of Science Citations: 2
Abstract

This work presents, for the first time, the effects of cobalt-modification on the photoelectrochemical properties of Sb(2)Se(3)thin films. The insertion of Co(2+)ions caused an increase in the photocurrent, without protecting and catalytic layers, of 2.5 times towards the hydrogen evolution reaction compared with an unmodified film in the same period and minimized the initial photocorrosion of the material. However, other properties such as bandgap and crystalline structure were not altered by the low degree of modification used in this work. Different results led us to infer that the Co(2+)ions modified the grain boundaries (GBs) of the Sb(2)Se(3)films, creating a local and specific GB inversion and causing these improvements observed in the photoelectrocatalytic properties of the modified films. (AU)

FAPESP's process: 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country
Grantee:Ana Flávia Nogueira
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 18/16401-8 - Photocatalysts and photoelectrodes for obtaining renewable fuels
Grantee:Lucia Helena Mascaro Sales
Support Opportunities: Regular Research Grants
FAPESP's process: 18/03156-5 - A high-throughput combinatorial approach in the study of metallic alloys and their respective chalcogenides for application in the CO2 photo-/electrochemical reduction reaction
Grantee:Francisco Willian de Souza Lucas
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/21365-8 - Electrodeposition and characterization of Sb2Se3 and MSbxSey (M = Cu, Co, Ni, or Zn) thin films for applications in the hydrogen production and CO2 reduction.
Grantee:Magno Barcelos Costa
Support Opportunities: Scholarships in Brazil - Doctorate