Photocatalytically Driven Dissolution of Macroscopic Nickel Surfaces

Wilbraham, Richard James and Boxall, Colin and Taylor, Robin J (2018) Photocatalytically Driven Dissolution of Macroscopic Nickel Surfaces. Corrosion Science, 131. pp. 137-146. ISSN 1879-0496

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Abstract

Photocatalytically generated H2O2-driven nickel dissolution has been studied as a novel, secondary waste minimal decontamination process for nuclear process steels. Nickel corrosion experiments in dilute H2SO4 show that at deliberately added [H2O2] ≤ 1 mM, nickel dissolution occurs via formation and dissolution of NiOH groups; at [H2O2] ≥ 10 mM (pseudo-)passivation by NiO prevents this. Furthermore, Nickel also dissolves slowly in mild acid, dissolution that is significantly accelerated in the presence of photogenerated peroxide – suggesting that photocatalytically generated H2O2 could be used to selectively increase dissolution of Ni, and potentially steel, surfaces that normally dissolve only slowly in mild acid.

Item Type:

Journal Article

Journal or Publication Title:

Corrosion Science

Additional Information:

This is the author’s version of a work that was accepted for publication in Corrosion Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Corrosion Science, 131, 2018 DOI: 10.1016/j.corsci.2017.11.018

Subjects:

?? a. nickelb. potentiostaticb. weight lossc. anodic dissolutionc. oxidation ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

88711

Deposited By:

ep_importer_pure

Deposited On:

17 Nov 2017 12:58

Refereed?:

Yes