Electrochemical investigation of formic acid electro-oxidation and its crossover through a Nafion® membrane

Wang, Xin; Hu, Jiming; Hsing, I‐Ming

doi:10.1016/j.jelechem.2003.08.010

Cited by 234 publications

(123 citation statements)

References 14 publications

Supporting

Mentioning

117

Contrasting

Order By: Relevance

“…In particular, direct formic acid fuel cell (DFAFC) has attracted great attention with its advantages of nontoxicity and low fuel crossover as compared to methanol, which makes DFAFC a promising candidate for power source in portable electronic devices [8,9]. As we have known, a catalyst is a very important part of fuel cells, and platinum is the most common anode catalyst for formic acid (FA) oxidation.…”

Section: Introductionmentioning

confidence: 99%

Au as an efficient promoter for electrocatalytic oxidation of formic acid and carbon monoxide: a comparison between Pt-on-Au and PtAu alloy catalysts

et al. 2013

View full text Add to dashboard Cite

The absence of unpaired d-electrons of gold leads to its lack of reactivity and paucity of catalytic activity. Synergistic activity of bimetallic PtAu has been proved, and its structure greatly influences on the electrocatalytic activity toward formic acid and carbon monoxide oxidation. Here, a comparison between Pt-modified Au (designated as Pt-on-Au) and PtAu alloy catalysts has been studied. The Pt-on-Au catalyst was prepared by electrodeposition of Pt on the pre-prepared Au, while PtAu alloy was obtained by co-electrodeposition. As a whole, both types of PtAu catalysts were found to be more active toward formic acid electrooxidation compared to pure Pt, exhibiting maximum activity on Pt-on-Au catalyst with Pt to Au atomic ratio of 1:10.22. Moreover, the Pt/Au atomic ratio directly relates to the oxidation pathway of formic acid and carbon monoxide oxidation. The results may be ascribed to much less CO ads on the surface than single Pt catalyst due to the effect of Au nanoparticles. CO stripping voltammograms present the obvious variation between Pt-on-Au and PtAu alloy catalysts. Meanwhile, the electrocatalytic activities of bimetallic PtAu are evaluated by electrochemical impedance spectroscopy and Tafel analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Au as an efficient promoter for electrocatalytic oxidation of formic acid and carbon monoxide: a comparison between Pt-on-Au and PtAu alloy catalysts

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Relation (11) shows that a same concentration of an ion in two different solvents do not imply a same activity in each of them. In fact there is no reason that the ion i be solvated in the same manner in water and in an other solvent, and then that its activity be the same.…”

Section: Resultsmentioning

confidence: 99%

“…In this field miniaturized fuel cells are destined to replace conventional batteries because fuel cells are able to store a much higher energy density, and overall are able to be immediately recharged by replacing the fuel cartridge. In this area, last years many works have been done on direct formic acid fuel cell (DFAFC) [8][9][10][11][12][13][14][15][16]. In these Polymer Electrolyte Membrane Fuel Cells (PEMFC) formic acid is directly oxidised into carbon dioxide and H + ions which crosses the membrane to the cathodic compartment and produce water from oxygen (air) reduction.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of acidity level and dissociation of formic acid/water mixtures as solvent

Jaime-Ferrer

Couallier

Rakib

et al. 2007

Electrochimica Acta

View full text Add to dashboard Cite

The autoprotolysis constant K HS of formic acid/water mixtures as solvent has been calculated from acid-base potentiometric titration curves. A correlation of the acidity scale pK HS of each media vs. that of pure water has been implemented owing to the electrochemical redox function R°(H + ) of Strehlow. The results show that formic acid/water mixtures are much more dissociated than pure water; they are sufficiently dissociated media to allow electrochemical measures without addition of an electrolyte. It has also been shown that for a same H + concentration the activity of protons increases when formic acid concentration grows. For more than 80% by weight of formic acid the acidity is sufficiently increased so that the whole acidity scale pK HS is in the super acid medium of the generalized acidity scale pH H2O .

show abstract

“…However, this does not mean that the crossover of formic acid is negligible, and crossover is still a significant issue limiting the performance of DFAFCs. Recent research work examined and quantified the crossover behavior of formic acid in DFAFCs [46][47][48][49]. Rhee et al [49] studied the permeation of formic acid through Nation® 112 and Nafion 117 membranes at room temperature.…”

Section: Crossover Of Formic Acid Through Nafion® Membranesmentioning

confidence: 99%

The Study of Pt and Pd based Anode Catalysis for Formic Acid Fuel Cell

Uwitonze¹,

Chen²

2017

Chem Sci J

View full text Add to dashboard Cite

Detailed investigation of HCOOH electro-oxidation started about five decades ago, with the advent of modern potentiodynamic techniques, driven initially by the purpose of elucidating some of the most interesting and challenging electrode kinetic problems. Many pioneering works that withstood the test of time and the continuous sophistication of surface electrochemistry techniques were published in the 1960s. Stimulated results were obtained, such as: (i) phenomenological interpretation of anodic polarization curves (e.g., Determination of Tafel parameters), HCOOH oxidation on Pd and Pt catalysts; (ii) discovery of the catalytic effect with respect to Pt and Pd for HCCOH oxidation; (iii) investigation of the potential dependent adsorption of HCOOH on Pt and Pd catalysts which are accompanied by a dual pathway mechanism and (iv) formic acid concentration, temperature effects and crossover of nafion membrane.

show abstract

Electrochemical investigation of formic acid electro-oxidation and its crossover through a Nafion® membrane

Cited by 234 publications

References 14 publications

Au as an efficient promoter for electrocatalytic oxidation of formic acid and carbon monoxide: a comparison between Pt-on-Au and PtAu alloy catalysts

Au as an efficient promoter for electrocatalytic oxidation of formic acid and carbon monoxide: a comparison between Pt-on-Au and PtAu alloy catalysts

Electrochemical determination of acidity level and dissociation of formic acid/water mixtures as solvent

The Study of Pt and Pd based Anode Catalysis for Formic Acid Fuel Cell

Contact Info

Product

Resources

About