Abstract
The goal of the present project consists of the study of electrocatalytic processes taking place in energy conversion and storage systems, particularly the ones involving reactions in fuel cells, including bio-active electrodes. Attention will be paid to the study of the oxygen reduction reaction and of the oxidation of alcohol molecules and hydrogen deliberately contaminated with traces of carbon monoxide. The investigation will also include the study of kinetic instabilities usually observed, for instance, during the electro-oxidation of small organic molecules such as formic acid, methanol, and ethylene glycol. It will be studied some fundamental aspects of the electrocatalysis as well as the kinetic instabilities of such reactions on massive pure metals (both single crystals and polycrystalline) and metallic alloys, and carbon dispersed electrocatalysts. In this case it will be employed nanoparticles of pure noble metals, alloys, core-shell structures formed by a transition metal covered by monolayers of noble metals, and metallic oxides. Finally, the development of biomaterials for low temperature bio fuel cells will be also considered, with emphasis on the immobilization of enzymes such as cloroperoxidase, peroxidase, lacase, tirosinase e glicose oxidase. Further development might also include operational systems of gas diffusion electrodes, on which the study of electrocatalyzed reactions of fundamental and practical interest will be carried out. The project will be developed by a team of permanent members of 5 professors, 2 associated researchers, and 2 technicians, and also nonpermanent ones including post-docs, graduated and undergraduate students, all belonging to the Institue of Chemistry of São Carlos, USP.The goal of the present project consists of the study of electrocatalytic processes taking place in energy conversion and storage systems, particularly the ones involving reactions in fuel cells, including bio-active electrodes. Attention will be paid to the study of the oxygen reduction reaction and of the oxidation of alcohol molecules and hydrogen deliberately contaminated with traces of carbon monoxide. The investigation will also include the study of kinetic instabilities usually observed, for instance, during the electro-oxidation of small organic molecules such as formic acid, methanol, and ethylene glycol. It will be studied some fundamental aspects of the electrocatalysis as well as the kinetic instabilities of such reactions on massive pure metals (both single crystals and polycrystalline) and metallic alloys, and carbon dispersed electrocatalysts. In this case it will be employed nanoparticles of pure noble metals, alloys, core-shell structures formed by a transition metal covered by monolayers of noble metals, and metallic oxides. Finally, the development of biomaterials for low temperature bio fuel cells will be also considered, with emphasis on the immobilization of enzymes such as cloroperoxidase, peroxidase, lacase, tirosinase e glicose oxidase. Further development might also include operational systems of gas diffusion electrodes, on which the study of electrocatalyzed reactions of fundamental and practical interest will be carried out. The project will be developed by a team of permanent members of 5 professors, 2 associated researchers, and 2 technicians, and also nonpermanent ones including post-docs, graduated and undergraduate students, all belonging to the Institue of Chemistry of São Carlos, USP. (AU)
Scientific publications
(46)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DELMONDE, M. V. F.;
NASCIMENTO, M. A.;
NAGAO, R.;
CANTANE, D. A.;
LIMA, F. H. B.;
VARELA, H.
Production of Volatile Species during the Oscillatory Electro-oxidation of Small Organic Molecules.
Journal of Physical Chemistry C,
v. 118,
n. 31,
p. 17699-17709,
AUG 7 2014.
Web of Science Citations: 14.
BI, WENYAN;
HE, YUXIU;
CABRAL, MURILO F.;
VARELA, HAMILTON;
YANG, JIAPING;
JIANG, RONGLI;
GAO, QINGYU.
Oscillatory electro-oxidation of thiosulfate on gold.
Electrochimica Acta,
v. 133,
p. 308-315,
JUL 1 2014.
Web of Science Citations: 14.
LOPES, PIETRO P.;
BATISTA, BRUNO C.;
SAGLIETTI, GUILHERME A.;
VARELA, HAMILTON;
TICIANELLI, EDSON A.
Real-time determination of CO2 production and estimation of adsorbate coverage on a proton exchange membrane fuel cell under oscillatory operation.
Journal of Solid State Electrochemistry,
v. 17,
n. 7, SI,
p. 1851-1859,
JUL 2013.
Web of Science Citations: 7.
YANG, JIAPING;
SONG, YANAN;
VARELA, HAMILTON;
EPSTEIN, IRVING R.;
BI, WENYAN;
YU, HUIYAO;
ZHAO, YUEMIN;
GAO, QINGYU.
The effect of chloride on spatiotemporal dynamics in the electro-oxidation of sulfide on platinum.
Electrochimica Acta,
v. 98,
p. 116-122,
MAY 30 2013.
Web of Science Citations: 14.
GONG, SHIRUI;
TANG, XIAODONG;
ZHENG, JUHUA;
NASCIMENTO, MELKE A.;
VARELA, HAMILTON;
ZHAO, YUEMIN;
GAO, QINGYU.
Amplitude-modulated spiral waves arising from a secondary Hopf bifurcation in mixed-mode oscillatory media.
Chemical Physics Letters,
v. 567,
p. 55-59,
APR 19 2013.
Web of Science Citations: 0.
ZHAO, YUEMIN;
WANG, SHASHA;
VARELA, HAMILTON;
GAO, QINGYU;
HU, XUEFENG;
YANG, JIAPING;
EPSTEIN, IRVING R.
Spatiotemporal Pattern Formation in the Oscillatory Electro-Oxidation of Sulfide on a Platinum Disk.
Journal of Physical Chemistry C,
v. 115,
n. 26,
p. 12965-12971,
JUL 7 2011.
Web of Science Citations: 11.