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

JOURNAL OF CLEANER PRODUCTION

卷:201

Article

Yliniemi, Kirsi¹  Nhat Truong Nguyen²  Mohajernia, Shiva²  Liu, Ning²  Wilson, Benjamin P.¹  Schmuki, Patrik^2,3  Lundstrom, Mari¹ 

[1] Aalto Univ, Sch Chem Engn, POB 16200, Aalto 00076, Finland

[2] Friedrich Alexander Univ Erlangen Nuremberg, Inst Surface Sci & Corros LKO, Dept Mat Sci, Martensstr 7, D-91058 Erlangen, Germany

[3] King Abdulaziz Univ, Dept Chem, Jeddah 80203, Saudi Arabia

关键词: Electrodeposition;    Redox replacement;    Hydrogen evolution;    Photocatalysis;    Circular economy;    Sustainable nanoparticles;   

DOI  :  10.1016/j.jclepro.2018.08.022

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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