DataVXACS Applied Materials & InterfacesPaper
journal article·2018-05-30

Forming a Highly Active, Homogeneously Alloyed AuPt Co-catalyst Decoration on TiO2 Nanotubes Directly During Anodic Growth

Haidong Bian, Nhat Truong Nguyen, JeongEun Yoo, Seyedsina Hejazi, Shiva Mohajernia, Julian Müller, Erdmann Spiecker, Hiroaki Tsuchiya, Ondrej Tomanec, Beatriz E. Sanabria-Arenas, Radek Zboril, Yang Yang Li, Patrik Schmuki

ACS Applied Materials & Interfaces· Volume 10· Issue 21
Publisher page
Source abstract

Abstract

Au and Pt do not form homogeneous bulk alloys as they are thermodynamically not miscible. However, we show that anodic TiO2 nanotubes (NTs) can in situ be uniformly decorated with homogeneous AuPt alloy nanoparticles (NPs) during their anodic growth. For this, a metallic Ti substrate containing low amounts of dissolved Au (0.1 atom %) and Pt (0.1 atom %) is used for anodizing. The matrix metal (Ti) is converted to oxide, whereas at the oxide/metal interface direct noble metal particle formation and alloying of Au and Pt takes place; continuously these particles are then picked up by the growing nanotube wall. In our experiments, the AuPt alloy NPs have an average size of 4.2 nm, and at the end of the anodic process, these are regularly dispersed over the TiO2 nanotubes. These alloyed AuPt particles act as excellent co-catalyst in photocatalytic H2 generation, with a H2 production rate of 12.04 μL h–1 under solar light. This represents a strongly enhanced activity as compared to TiO2 NTs decorated with monometallic particles of Au (7 μL h–1) or Pt (9.96 μL h–1).
Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloysNanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Electrocatalysts for Energy Conversion · TiO2 Photocatalysis and Solar Cells

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong, China

Institute for Surface Science and Corrosion WW4-LKO, Friedrich-Alexander University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany

Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy, Friedrich-Alexander University of Erlangen-Nuremberg, Cauerstraße 6, D-91058 Erlangen, Germany

Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, 565-0871 Suita, Osaka, Japan

Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, 78371 Olomouc, Czech Republic

Laboratorio di Corrosione dei Materiali “Pietro Pedeferri”, Politecnico di Milano, 20131 Milan, Italy

Chemistry Department, Faculty of Sciences, King Abdulaziz University, 80203 Jeddah, Saudi Arabia

Funding

European Regional Development Fund · Ministerstvo ?kolstv?, Ml?de?e a Telov?chovy · Deutsche Forschungsgemeinschaft · H2020 European Research Council

References (40)

Show source-provided references
1. 10.1021/cr500061m10.1021/cr500061m ↗
2. 10.1039/B9NR00131J10.1039/B9NR00131J ↗
3. 10.1039/C6NH00054A10.1039/C6NH00054A ↗
4. 10.1002/anie.20100137410.1002/anie.201001374 ↗
5. 10.1007/BF0239693510.1007/BF02396935 ↗
6. 10.1002/(SICI)1096-9918(199907)27:7<629::AID-SIA551>3.0.CO;2-010.1002/(SICI)1096-9918(199907)27:7<629::AID-SIA551>3.0.CO;2-0 ↗
7. 10.1002/smll.20120056410.1002/smll.201200564 ↗
8. 10.1021/acscatal.6b0370910.1021/acscatal.6b03709 ↗
9. 10.1021/nl062000o10.1021/nl062000o ↗
10. 10.1021/jp011118k10.1021/jp011118k ↗
11. 10.1038/nchem.104810.1038/nchem.1048 ↗
12. 10.1002/aenm.20150192610.1002/aenm.201501926 ↗
13. 10.1021/ja502890c10.1021/ja502890c ↗
14. 10.1002/anie.20131009710.1002/anie.201310097 ↗
15. 10.1021/ja502704n10.1021/ja502704n ↗
16. 10.1002/adfm.20120214810.1002/adfm.201202148 ↗
17. 10.1021/ja402072r10.1021/ja402072r ↗
18. 10.1002/adfm.20070021610.1002/adfm.200700216 ↗
19. 10.1039/c3ta01451g10.1039/c3ta01451g ↗
20. 10.1021/la052955710.1021/la0529557 ↗
21. 10.1016/j.actamat.2008.08.02410.1016/j.actamat.2008.08.024 ↗
22. 10.1007/BF0287118710.1007/BF02871187 ↗
23. 10.1021/nl302329n10.1021/nl302329n ↗
24. 10.1039/C2GC16112E10.1039/C2GC16112E ↗
25. 10.1038/srep2667010.1038/srep26670 ↗
26. 10.1021/acscatal.5b0062310.1021/acscatal.5b00623 ↗
27. 10.1002/cssc.20120008510.1002/cssc.201200085 ↗
28. 10.1002/adma.20080118910.1002/adma.200801189 ↗
29. Murray J. L. · 1987
30. 10.1038/3506852910.1038/35068529 ↗
31. 10.1149/1.178482010.1149/1.1784820 ↗
32. 10.1021/ja035318g10.1021/ja035318g ↗
33. 10.1038/nmat318510.1038/nmat3185 ↗
34. 10.1039/c0cp01998d10.1039/c0cp01998d ↗
35. 10.1107/S160057751700625710.1107/S1600577517006257 ↗
36. 10.1021/la101752a10.1021/la101752a ↗
37. 10.1039/C6TA04468A10.1039/C6TA04468A ↗
38. 10.1021/cm101109e10.1021/cm101109e ↗
39. 10.1021/jp302485g10.1021/jp302485g ↗
40. 10.1021/ja101305x10.1021/ja101305x ↗