期刊
JOURNAL OF CLEANER PRODUCTION
卷 201, 期 -, 页码 39-48出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2018.08.022
关键词
Electrodeposition; Redox replacement; Hydrogen evolution; Photocatalysis; Circular economy; Sustainable nanoparticles
资金
- Academy of Finland (NoWASTE), Finland [297962]
- DFG (the Erlangen DFG cluster of excellence EAM) [EXC 315]
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 (H-2) 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. (C) 2018 The Authors. Published by Elsevier Ltd.
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