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Methanol electrooxidation at nickel-modified rhodanine self assembled monolayer films: A new class of multilayer electrocatalyst
Affiliation:1. Bingöl University, Science and Letters Faculty, Chemistry Department, 12000, Bingöl, Turkey;2. Bingöl University, Genç Vocational School, Property Protection and Security Department, Civil Defense and Firefighting Program, 12000, Bingöl, Turkey;3. Bingöl University, Health Sciences Faculty, Occupational Health and Safety Department, 12000, Bingöl, Turkey;1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, PR China;2. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, PR China;1. Affiliation UST AGH University of Science and Technology in Kraków, Faculty of Non-Ferrous Metals, Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals, Mickiewicza 30 Ave., Kraków, 30-059, Poland;2. Bingöl University, Science and Letters Faculty, Chemistry Department, 12000, Bingöl, Turkey;3. Bingöl University, Health Sciences Faculty, Occupational Health and Safety Department, Bingöl 12000, Turkey;1. Bingöl University, Science and Letters Faculty, Chemistry Department, 12000, Bingöl, Turkey;2. Department of Chemistry, Faculty of Arts and Sciences, Gaziantep University, 27310, Şehitkamil, Gaziantep, Turkey;1. Bingöl University, Health Sciences Faculty, Occupational Health and Safety Department, 12000, Bingöl, Turkey;2. Bingöl University, Science and Letters Faculty, Chemistry Department, 12000, Bingöl, Turkey
Abstract:Nickel modified rhodanine (Rh) self-assembled monolayer films (Rh-SAM/Ni) were fabricated on copper from 10.0 mM Rh containing methanol. The films were characterized with the help of scanning electron microscopy (SEM), atomic force microscopy (AFM) and energy dispersive X-ray spectroscopy (EDX) techniques. The methanol oxidation activity of the Rh-SAM/Ni electrode was tested in 1.0 M methanol containing 0.1 M KOH solution using many electrochemical techniques. The results indicated that well-ordered and very homogeneously distributed Rh-SAM films were assembled over the copper surface. The rate of methanol electrooxidation reaction can be enhanced by modifying copper surface with Rh-SAM/Ni multi-layer film. The enhanced activity was related to increasing active sites over the surface for adsorption and oxidation of methanol as well as facilitating oxidation or desorption of adsorpted intermediates of the process. It was suggested that the Rh-SAM layer could be a candidate supporting material for fabricating direct methanol fuel cell (DMFCs) anodes.
Keywords:Copper  Rhodanine  Nickel  Self-assembled monolayers  Methanol electrooxidation  Direct methanol fuel cells
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