Sökning: (WFRF:(Sharifi Hamid)) >
Palladium nanocryst...
-
Hu, GuangzhiUmeå universitet,Institutionen för fysik
(författare)
Palladium nanocrystals supported on helical carbon nanofibers for highly efficient electro-oxidation of formic acid, methanol and ethanol in alkaline electrolytes
- Artikel/kapitelEngelska2012
Förlag, utgivningsår, omfång ...
-
Elsevier BV,2012
-
printrdacarrier
Nummerbeteckningar
-
LIBRIS-ID:oai:DiVA.org:su-80025
-
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-80025URI
-
https://doi.org/10.1016/j.jpowsour.2012.02.080DOI
-
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-56189URI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
AuthorCount:8;
-
Funding Agency: Magnus Bergvalls stiftelse, Kempestiftelsen, Wenner-Gren stiftelsen, Polish Ministry of Science and Higher Education through NCN 2011/01/B/STS/03888, Ångpanneforeningen, Gustaf Richerts stiftelse.
-
We present the synthesis of palladium nanocrystals self-assembled on helical carbon nanofibers functionalized with benzyl mercaptan (Pd-S-HCNFs) and their electrocatalytic activity toward the oxidation of formic acid, methanol and ethanol. Helical carbon nanofibers (HCNFs) were first functionalized with benzyl mercaptan based on the pi-pi interactions between phenyl rings and the graphitic surface of HCNFs. Palladium nano crystals (PdNC) were fixed on the surface of functionalized HCNF by Pd-S bonds in a simple self-assembly method. The as-prepared materials were characterized by high resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), cyclic voltammetry (CV), and fuel cell tests. CV characterization of the as-prepared materials shows a very high electrocatalytic activity for oxidation of formic acid, ethanol and methanol in strong alkaline electrolyte. In comparison to commercial catalyst Vulcan XC-72 decorated with Pd nanoparticles, the proposed Pd-S-HCNFs nano composite material shows oxidation currents for formic acid, ethanol and methanol at the Pd-S-HCNF-modified electrode that are higher than that at the Pd/XC-72 modified electrode with a factor of 2.0, 1.5, and 2.3, respectively. In a formic acid fuel cell the Pd-S-HCNF modified electrode yields equal power density as commercial Pd/XC-72 catalyst. Our results show that Pd-decorated helical carbon nanofibers with diameters around 40-60 nm have very high potential as active material in fuel cells, electrocatalysts and sensors.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Nitze, FlorianUmeå universitet,Institutionen för fysik(Swepub:umu)flni0002
(författare)
-
Barzegar, Hamid RezaUmeå universitet,Institutionen för fysik(Swepub:umu)hare0009
(författare)
-
Sharifi, TivaUmeå universitet,Institutionen för fysik(Swepub:umu)tish0004
(författare)
-
Mikolajczuk, AniaPolish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland
(författare)
-
Tai, Cheuk-WaiStockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm Univ, Arrhenius Lab, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden(Swepub:su)ctai
(författare)
-
Borodzinski, AndrzejPolish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland
(författare)
-
Wågberg, ThomasUmeå universitet,Institutionen för fysik(Swepub:umu)thwa0002
(författare)
-
Umeå universitetInstitutionen för fysik
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:Journal of Power Sources: Elsevier BV209, s. 236-2420378-77531873-2755
Internetlänk
Hitta via bibliotek
Till lärosätets databas