A direct synthesis of platinum/nickel co-catalysts on titanium dioxide nanotube surface from hydrometallurgical-type process streams

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-11-10
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
39-48
Series
Journal of Cleaner Production, Volume 201C
Abstract
Solutions that simulate hydrometallurgical base metal process streams with high nickel (Ni) and minor platinum (Pt) concentrations were used to create Pt/Ni nanoparticles on TiO2 nanotube surfaces. For this, electrochemical deposition – redox replacement (EDRR) was used that also allowed to control the nanoparticle size, density and Pt/Ni content of the deposited nanoparticles The Pt/Ni nanoparticle decorated titanium dioxide nanotubes (TiO2 nanotubes) become strongly activated for photocatalytic hydrogen (H2) evolution. Moreover, EDRR facilitates nanoparticle formation without the need for any additional chemicals and is more effective than electrodeposition alone. Actually, a 10,000-time enrichment level of Pt took place on the TiO2 surface when compared to Pt content in the solution with the EDRR method. The results show that hydrometallurgical streams offer great potential as an alternative raw material source for industrial catalyst production when coupled with redox replacement electrochemistry.
Description
Keywords
Electrodeposition, Redox replacement, Hydrogen evolution, Photocatalysis, Circular economy, Sustainable nanoparticles
Other note
Citation
Yliniemi , K , Nguyen , N T , Mohajernia , S , Liu , N , Wilson , B , Schmuki , P & Lundström , M 2018 , ' A direct synthesis of platinum/nickel co-catalysts on titanium dioxide nanotube surface from hydrometallurgical-type process streams ' , Journal of Cleaner Production , vol. 201 , pp. 39-48 . https://doi.org/10.1016/j.jclepro.2018.08.022