Shape evolution of carbon supported Pt nanoparticles: From synthesis to application
Authorized Users Only
2016
Authors
Krstajić-Pajić, MilaStevanović, Sanja
Radmilović, Vuk
Gavrilović-Wohlmuther, Aleksandra
Radmilović, Velimir R.
Gojković, Snežana Lj.
Jovanović, Vladislava M.
Article (Published version)
Metadata
Show full item recordAbstract
In this research, a water-in-oil microemulsion method with HCl as a capping agent was applied to synthesize carbon supported Pt catalysts. Varying the concentration of HCl caused changes in the shape of obtained nanoparticles, i.e. preferential growth of certain facets. Addition of catalyst support in the synthesis process facilitated the cleaning procedures necessary to remove the surfactant residues. Prepared catalyst powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD analysis indicated the influence of HCl addition on the crystallite size and crystal habit. TEM revealed that addition of higher amounts of the capping agent led to the formation of a noticable amount of particles with concave cubic or branched-like structures. Influence of the catalyst particles shape on its electrochemical properties was tested in the oxidations of COads, ammonia and formic acid. The latter one was examined in terms of both activity and stability of a...s prepared and oxide-annealed (electrochemically treated) catalysts. The results clearly demonstrate that even small changes in the nanoparticle surface structure give rise to distinct modifications in their properties. Concave cubic particles, in comparison to other catalysts, show improved catalytic properties and the contribution of their preferentially oriented {100} facets is electrochemically detectable.
Keywords:
Cuboidal Pt particles / Formic acid oxidation / CO oxidationSource:
Applied Catalysis B-Environmental, 2016, 196, 174-184Publisher:
- Elsevier Science Bv, Amsterdam
Funding / projects:
- New approach in designing materials for energy conversion and energy storage systems (RS-MESTD-Basic Research (BR or ON)-172060)
- Serbian Academy of Sciences and Arts [F-141]
DOI: 10.1016/j.apcatb.2016.05.033
ISSN: 0926-3373
WoS: 000380414500017
Scopus: 2-s2.0-84970971210
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Krstajić-Pajić, Mila AU - Stevanović, Sanja AU - Radmilović, Vuk AU - Gavrilović-Wohlmuther, Aleksandra AU - Radmilović, Velimir R. AU - Gojković, Snežana Lj. AU - Jovanović, Vladislava M. PY - 2016 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3221 AB - In this research, a water-in-oil microemulsion method with HCl as a capping agent was applied to synthesize carbon supported Pt catalysts. Varying the concentration of HCl caused changes in the shape of obtained nanoparticles, i.e. preferential growth of certain facets. Addition of catalyst support in the synthesis process facilitated the cleaning procedures necessary to remove the surfactant residues. Prepared catalyst powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD analysis indicated the influence of HCl addition on the crystallite size and crystal habit. TEM revealed that addition of higher amounts of the capping agent led to the formation of a noticable amount of particles with concave cubic or branched-like structures. Influence of the catalyst particles shape on its electrochemical properties was tested in the oxidations of COads, ammonia and formic acid. The latter one was examined in terms of both activity and stability of as prepared and oxide-annealed (electrochemically treated) catalysts. The results clearly demonstrate that even small changes in the nanoparticle surface structure give rise to distinct modifications in their properties. Concave cubic particles, in comparison to other catalysts, show improved catalytic properties and the contribution of their preferentially oriented {100} facets is electrochemically detectable. PB - Elsevier Science Bv, Amsterdam T2 - Applied Catalysis B-Environmental T1 - Shape evolution of carbon supported Pt nanoparticles: From synthesis to application EP - 184 SP - 174 VL - 196 DO - 10.1016/j.apcatb.2016.05.033 ER -
@article{ author = "Krstajić-Pajić, Mila and Stevanović, Sanja and Radmilović, Vuk and Gavrilović-Wohlmuther, Aleksandra and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.", year = "2016", abstract = "In this research, a water-in-oil microemulsion method with HCl as a capping agent was applied to synthesize carbon supported Pt catalysts. Varying the concentration of HCl caused changes in the shape of obtained nanoparticles, i.e. preferential growth of certain facets. Addition of catalyst support in the synthesis process facilitated the cleaning procedures necessary to remove the surfactant residues. Prepared catalyst powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD analysis indicated the influence of HCl addition on the crystallite size and crystal habit. TEM revealed that addition of higher amounts of the capping agent led to the formation of a noticable amount of particles with concave cubic or branched-like structures. Influence of the catalyst particles shape on its electrochemical properties was tested in the oxidations of COads, ammonia and formic acid. The latter one was examined in terms of both activity and stability of as prepared and oxide-annealed (electrochemically treated) catalysts. The results clearly demonstrate that even small changes in the nanoparticle surface structure give rise to distinct modifications in their properties. Concave cubic particles, in comparison to other catalysts, show improved catalytic properties and the contribution of their preferentially oriented {100} facets is electrochemically detectable.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Applied Catalysis B-Environmental", title = "Shape evolution of carbon supported Pt nanoparticles: From synthesis to application", pages = "184-174", volume = "196", doi = "10.1016/j.apcatb.2016.05.033" }
Krstajić-Pajić, M., Stevanović, S., Radmilović, V., Gavrilović-Wohlmuther, A., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2016). Shape evolution of carbon supported Pt nanoparticles: From synthesis to application. in Applied Catalysis B-Environmental Elsevier Science Bv, Amsterdam., 196, 174-184. https://doi.org/10.1016/j.apcatb.2016.05.033
Krstajić-Pajić M, Stevanović S, Radmilović V, Gavrilović-Wohlmuther A, Radmilović VR, Gojković SL, Jovanović VM. Shape evolution of carbon supported Pt nanoparticles: From synthesis to application. in Applied Catalysis B-Environmental. 2016;196:174-184. doi:10.1016/j.apcatb.2016.05.033 .
Krstajić-Pajić, Mila, Stevanović, Sanja, Radmilović, Vuk, Gavrilović-Wohlmuther, Aleksandra, Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Shape evolution of carbon supported Pt nanoparticles: From synthesis to application" in Applied Catalysis B-Environmental, 196 (2016):174-184, https://doi.org/10.1016/j.apcatb.2016.05.033 . .