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

Kirsi Yliniemi, Nhat Truong Nguyen, Shiva Mohajernia, Ning Liu, Benjamin Wilson, Patrik Schmuki, Mari Lundström

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)
153 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)39-48
Number of pages9
JournalJournal of Cleaner Production
Volume201
DOIs
Publication statusPublished - 10 Nov 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Electrodeposition
  • Redox replacement
  • Hydrogen evolution
  • Photocatalysis
  • Circular economy
  • Sustainable nanoparticles

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