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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.)

NiMo-NiCu Inexpensive Composite with High Activity for Hydrogen Evolution Reaction

Full text
Author(s):
Santos, Hugo L. S. [1] ; Corradini, Patricia G. [1] ; Medina, Marina [1] ; Dias, Jeferson A. [2] ; Mascaro, Lucia H. [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ACS APPLIED MATERIALS & INTERFACES; v. 12, n. 15, p. 17492-17501, APR 15 2020.
Web of Science Citations: 11
Abstract

In this work, the effect of copper addition on NiMo coating is evaluated in regard to the hydrogen evolution reaction (HER). NiMo and NiMo-NiCu composites are prepared by a simple coelectrodeposition process. The effect of Cu on deposit characters were tested by varying it in the range of 0.06-0.20 molar ratio. Copper addition promotes the growth of a new crystalline phase: NiCu. Also, the copper addition changed the composite surface. NiMo-NiCu0.12 shows a surface roughness 30 times higher than the NiMo material. NiMo-NiCu materials present higher activity toward HER, larger electroactive area, and higher stability in continuous water electrolysis than NiMo catalysts, as demonstrated by Tafel curves, electrochemical impedance spectroscopy measurements, and polarization tests. The combination of the large electroactive area due to the copper addition, the synergism between Ni-Mo, and the presence of Ni and Mo oxides on the surface results in catalyst with excellent features for HER application. (AU)

FAPESP's process: 17/12794-2 - Synthesis, characterization and application of MoS2 and WS2 films in photoelectrocatalysis for hydrogen production
Grantee:Marina Medina da Silva
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
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: 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