Ethanol cyclic voltammogram

The cyclic voltammograms of platinum, recorded in a three-electrode cell containing 0.1 M perchloric acid solutions with various concentrations of ethanol (from 5x10" to 0.2 M), are shown in Fig. 38. 

Figure 23-25 Cyclic voltammogram of the insecticide parathion in 0.5 M pH 5 sodium acetate buffer in 50% ethanol. Hanging mercury drop electrode. Scan rate 200 mV/s. (From W. R. Heineman and R T. Kissinger, Amer. Lab., 1982 (11), 34. Copyright 1982 by International Scientific Communications, Inc. Reprinted with permission.)...

The cyclic voltammograms of RSn/C eletrocatalyts in the absence of ethanol are shown in Fig. 2. The PtSn/C eletrocatalysts prepared by ARP method do not have a well-defined hydrogen adsorption-desorption region (0-... 

Besides methanol and ethanol, only a few other small molecules (HCOOH, HCHO, CO), have been oxidized at electron conducting polymer electrodes modified by incorporation of platinum microparticles. The first study on formic acid oxidation at Pt particles dispersed in a PAni matrix was carried out, as early as 1986, by Gholamian et al. [57], They found that the incorporation of 100 pg cm of Pt into PAni was sufficient to enhance considerably the oxidation rate of formic acid (ten-fold increase). The cyclic voltammograms recorded with 0.5 M HCOOH in 0,5 M H2SO4 displayed an enhanced oxidation current particularly for the first oxidation peak at 0.2 V/SCE, attributed to the oxidation of the weakly adsorbed intermediate (reactive species). The second peak, at 0.6 V/SCE, attributed to the oxidation of the strongly chemisorbed... 

Figure 10. Cyclic voltammograms of the Pd-based electrodes and Pt/C in 1 M KOH solution containing 1 M ethanol at a sweep rate of 50 mVs at room temperature, Pd loading 0.2 mg cm . (a) Pd/MWCNT, (b) Pd/C, (c) Pt/C and (d) Pd/ACF. Reprinted from Hai Tao Zheng, Yon i-ang Li, Shuixia Chen, and Pei Kang Shen, Effect of support on the activity of Pd electrocatalysts for ethanol oxidation, Journal of Power Sources, 163 (2006) 371-75, Copyright (2006), with permission from Elsevier.

Figure 12. Cyclic voltammograms of methanol, ethanol and glycerol oxidation on a Pd/MWCNT electrode in 2 M KOH. Pd loading 17 tg cm. Scan rate 50 mV s". Reprinted from Ref. 29, Copyright (2009) with permission from Elsevier.

The ethanol oxidation reaction on the catalysts Pd-(Ni-Zn)/C and Pd-(Ni-Zn-P)/C, obtained by the spontaneous deposition of Pd onto Vulcan XC-72-supported Ni-Zn or Ni-Zn-P alloys (vide supra), has been investigated by Bianchini and coworkers by CV. Figure 20 shows the cyclic voltammograms acquired at very low Pd loading (22 pg cm" ) in 2 M KOH solution. 

Figure 20. Cyclic voltammograms of ethanol oxidation on Pd-(Ni-Zn-PyC and Pd-(Ni-Zn)/C electrodes in 2 M KOH and 10 wt% ethanol. Pd loading 22 (rg cm. Scan rate 50 mV s. Room temperature.

Fig. 15 Cyclic voltammograms for reductive desorption of HDT self-assembled monolayers after immersion in 1 mmol dm MDDA ethanol solution at 31 °C. Time of immersion 0 (curve 1), 24 (curve 2), 48 (curve 3), 72 (curve 4), 96 (curve 5), 124 (curve 6), 144 (curve 7), 168 (curve 8),...

Figure 4.27. The effect of Ru/Pt layer electrodeposited over Pt on the HCOOH cyclic voltammogram. Solid line Ru/Pt deposited onto Pt dashed line polycrystalline Pt. Electrolyte 1 M HCOOH - 0.1 M HCIO4 and 1 M HCOOH-0.1 M H2SO4 (inset figure). 298 K. Scan rate 20 mV s Electrode potential expressed vs. RHE [150], (Reprinted from Journal of Power Sources, 163(2), Lemos SG, Oliveira RTS, Santos MC, Nascente PAP, Bulhoes LOS, Pereira EC, Electrocatalysis of methanol, ethanol and formic acid using a Ru/Pt metallic bilayer, 695-701, 2007, with permission from Elsevier.)...

Figure 4.39. Cyclic voltammogram of ethanol oxidation in alkaline media on Pd and Pt catalysts. 1 M ethanol - 1 M KOH, sweep rate 50 mV s 293 K. [198], E [Hgmgo, a(on-) = i] = 0.098 V vs. SHE. a) Pd/MWCNT, b) Pd/C, c) Pt/C, and d) Pd/ACF. (Reproduced from Journal of Power Sources, 163(1), Zheng HT, Li Y, Chen S, Shen PK, Effect of support on the activity of Pd electrocatalyst for ethanol oxidation, 371-5, 2006, with permission from Elsevier.)...

FIGURE 3.2 Cyclic voltammogram at SOmVs of the electrooxidation of ethanol, 0.1 M (dashed line) and IM (straight line) on smooth polycrystalline Pt. Reprinted with permission from [11],... 

Fig. 5 (A) Cyclic voltammograms (scan rate 0.05 Vs cycle 1) for the reduction of immobilised AR-UMCM-1 immersed in ethanol with 0.01 M NBujPFJl mM HCIO4. (B) As above, but for cycle 4. (C) Cyclic voltammograms (scan rate 0.01 Vs , first potential cycle) showing generator (4.9 mm diameter basal plane pyrolytic graphite) and collector (50 pm diameter platinum wire) data. (D) As above, second potential cycle (taken from ref. 70).

Fig. 8 (A) Programmed electrodeposition method of one-step synthetic process (B) Characterizations of THH Pd NPs. (a) SEM image, the inset is a high-magnification SEM image (b) TEM image recorded along the [001] direction (c) HRTEM image recorded from the boxed area in (b), showing some 210 and 310 steps that have been marked by black dots (d) Cyclic voltammograms of THH Pd NPs (solid line) and Pd black catalyst (dashed line) at 10 mV in 0.1 M ethanol-H 0.1 M NaOH. Reproduced with permission from ref 4. Copyright 2010 American Chemical Society.

Figure 8. Blank cyclic voltammogram of R-poly electrode in parallel with hydrogen oxidation reaction, oxygen reduction reaction and ethanol oxidation reaction. For neither of these cases Pt surface cannot be considered as clean or static.

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