Copper–nickel combinatorial library screening for electrocatalytic formaldehyde oxidation

The electrocatalytic behaviour of a thermally evaporated Cu–Ni thin film combinatorial library was investigated by screening the entire compositional spread in alkaline solution using flow‐type scanning droplet cell microscopy. Crystallographic properties and surface microstructure were investigated...

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Bibliographic Details
Published in:Physica status solidi. A, Applications and materials science Applications and materials science, 2017-09, Vol.214 (9), p.n/a
Main Authors: Pötzelberger, Isabella, Mardare, Andrei Ionut, Hassel, Achim Walter
Format: Article
Language:English
Subjects:
Aldehydes
Combinatorial analysis
combinatorial libraries
Copper base alloys
Crystallography
electrocatalytic oxidation
Electrochemical analysis
Evaporation
Formaldehyde
Libraries
Nickel base alloys
Oxidation
Reproducibility
scanning droplet cell microscopy
Screening
Thin films
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Summary:The electrocatalytic behaviour of a thermally evaporated Cu–Ni thin film combinatorial library was investigated by screening the entire compositional spread in alkaline solution using flow‐type scanning droplet cell microscopy. Crystallographic properties and surface microstructure were investigated using XRD and SEM. The obtained Cu–Ni thin film alloys (1–13 at.% Ni) showed suitability for being used in formaldehyde detection. The electrochemical performance of the thin film electrodes was investigated by cyclic voltammetric and chronoamperometric measurements. The highest electrocatalytic effect was found for Cu‐6.9 at.% Ni. The concept of a formaldehyde sensor using Cu‐6.9 at.% Ni was tested. The identified alloy showed good performance for formaldehyde detection in a wide linear range (3–200 mM), high reproducibility (relative standard deviation ∼6%), long‐term stability and sensitivity to formaldehyde oxidation.
ISSN:1862-6300
1862-6319
DOI:10.1002/pssa.201600552