A comparative study on ethanol oxidation behavior at Pt and PtRh electrodeposits

Electrochemical and in situ ATR-FTIR studies of ethanol electro-oxidation in alkaline medium using PtRh/C electrocatalysts

“…The nanoparticles' mean diameter was determined by counting about 200 randomly chosen particles from the relevant TEM images [30,31] and the particles are with an average diameter of 4 nm for all Rh content catalyst, and 6 nm for Pt/C. The particles sizes measured are in accordance with similar materials described in literature [20,24,32]. Figure 2a shows XRD patterns of Pt/C, Rh/C and PtRh/C electrocatalysts.…”

“…The diffraction peaks of Pt(fcc) and Rh(fcc) phases are very close; however, it was observed that the diffraction peaks of the fcc phase of PtRh/C electrocatalyts were slightly shifted to higher 2h values compared to Pt/C electrocatalyst and this shift increases with the increase of Rh content [32]. According to Gupta et al [20], such evidence accounts for the presence of PtRh alloy formation. To obtain more information about the material structure, the diffractograms were refined using the Pawley method [33] carried out with Fityk 0.98 software, as reported by Wojdyr [34].…”

“…In acid medium, the addition of Rh to Pt catalysts increases the CO 2 yield by facilitating C-C bond cleavage; however, the obtained currents do not increase [19][20][21]. Kowal et al [4,22] prepared PtRhSnO 2 /C electrocatalyst depositing Pt and Rh atoms on carbon-supported SnO 2 nanoparticles and tested for ethanol electro-oxidation.…”

Enhancement of Ethanol Oxidation Reaction on Pt (PtSn)-Activated Nickel Foam Through In situ Formation of Nickel Oxy-Hydroxide Layer

“…Ethanol oxidation reaction (EOR) is a complex anodic process, which involves dissociation of preadsorbed ethanol molecules to produce surface-adsorbed carbon monoxide (CO ad ) species and further oxidation of C 2 H 5 OH to form (apart from numerous intermediates and by-products) two major chemicals, namely acetaldehyde and acetic acid (Pathway I: 4e − ). In fact, most of these products might become adsorbed on the catalyst surface, and thus, quantitative cleavage of the C-C bond (in order to finally generate CO 2 Pathway II: 12e − ) in an ethanol molecule constitutes a key technical problem [1][2][3][4][5][6][7][8].…”

Electro-oxidation of Ethanol on Carbon Supported PtSn and PtSnNi Catalysts

“…Research has thus focused on the use of alloy catalysts to improve the electro-activity of Pt [3][4][5][6][7][8]. Metals such as Sn have been identified as suitable materials to form alloys with Pt for ethanol electro-oxidation in acid solutions [8][9][10].…”