Catalytic and electro-catalytic oxidation of formic acid on the pure and Cu-modified Pd(111)-surface

Brandt, K.; Steinhausen, M.; Wandelt, K.

doi:10.1016/j.jelechem.2007.12.015

Cited by 41 publications

(30 citation statements)

References 66 publications

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“…Neither was it identified on Pd (111) in a highly concentrated FA solution. 63 In a recent ATR-SEIRAS study, 14 by using a chemically deposited Pd film on the Si prism as the working electrode in a 25 mM FA solution, Miyake et al detected very weak CO ad peaks around 1730 cm À1 at relatively low oxidation potentials while even weaker peaks around 1830 cm À1 appeared as the potential was scanned to higher values. However, such an assignment may be compromised due to the possible overlapping of the n CQO vibration band (at ca.…”

Section: Reactive Intermediate Of Fao (Controversy Over Formate)mentioning

confidence: 99%

Electrocatalysis of formic acid on palladium and platinum surfaces: from fundamental mechanisms to fuel cell applications

Jiang

Zhang

Zou

et al. 2014

Phys. Chem. Chem. Phys.

333

252

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Formic acid as a natural biomass and a CO2 reduction product has attracted considerable interest in renewable energy exploitation, serving as both a promising candidate for chemical hydrogen storage material and a direct fuel for low temperature liquid fed fuel cells. In addition to its chemical dehydrogenation, formic acid oxidation (FAO) is a model reaction in the study of electrocatalysis of C1 molecules and the anode reaction in direct formic acid fuel cells (DFAFCs). Thanks to a deeper mechanistic understanding of FAO on Pt and Pd surfaces brought about by recent advances in the fundamental investigations, the "synthesis-by-design" concept has become a mainstream idea to attain high-performance Pt- and Pd-based nanocatalysts. As a result, a large number of efficient nanocatalysts have been obtained through different synthesis strategies by tailoring geometric and electronic structures of the two primary catalytic metals. In this paper, we provide a brief overview of recent progress in the mechanistic studies of FAO, the synthesis of novel Pd- and Pt-based nanocatalysts as well as their practical applications in DFAFCs with a focus on discussing studies significantly contributing to these areas in the past five years.

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Section: Reactive Intermediate Of Fao (Controversy Over Formate)mentioning

confidence: 99%

Electrocatalysis of formic acid on palladium and platinum surfaces: from fundamental mechanisms to fuel cell applications

Jiang

Zhang

Zou

et al. 2014

Phys. Chem. Chem. Phys.

333

252

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“…It turns out from several studies that not only the support, but also the different additives have a marked influence on the decomposition of FA and the characteristics of the surface formate on different metal surfaces [35][36][37][38][39][40][41][42]. On rhodium surfaces, the attention is focused on the effect of electronegative (preadsorbed oxygen) and electropositive (potassium) additives.…”

Section: Introductionmentioning

confidence: 99%

The Potassium-Induced Decomposition Pathway of HCOOH on Rh(111)

Kovács

Kiss

2020

Catalysts

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Formic acid (FA) can be considered both a CO and a H2 carrier via selective dehydration and dehydrogenation pathways, respectively. The two processes can be influenced by the modification of the active components of the catalysts used. In the present study the adsorption of FA and the decomposition of the formed formate intermediate were investigated on potassium promoted Rh(111) surfaces. The preadsorbed potassium markedly increased the uptake of FA at 300 K, and influenced the decomposition of formate depending on the potassium coverage. The work function (Δϕ) is increased by the adsorption of FA on K/Rh(111) at 300 K suggesting a large negative charge on the chemisorbed molecule, which could be probably due to the enhanced back-donation of electrons from the K-promoted Rh into an empty π orbital of HCOOH. The binding energy of the formate species is therefore increased resulting in a greater concentration of irreversibly adsorbed formate species. Decomposition of the formate species led to the formation of H2, CO2, H2O, and CO, which desorbed at significantly higher temperatures from the K-promoted surface than from the K-free one as it was proven by thermal desorption studies. Transformation of surface formate to carbonate (evidenced by UPS) and its decomposition and desorption is responsible for the high temperature CO and CO2 formation.

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“…As reported, since anatase TiO 2 can effectively engender OH species, Pt or Pd supported on anatase TiO 2 possesses excellent catalytic activity toward methanol electrooxidation. However, in direct formic acid fuel cells, formic acid electrooxidation on the Pd catalyst is via "the direct pathway", produces negligible CO intermediates [27][28][29] and possesses striking catalytic performance [30][31][32][33], which means formation of the OH species is not a prerequisite. Thus, the influence of the crystal structure of TiO 2 on Pd catalysts for formic acid electrooxidation remains unknown.…”

Section: Introductionmentioning

confidence: 99%

The influence of the crystal structure of TiO2 support material on Pd catalysts for formic acid electrooxidation

Wang

Xia

2010

Electrochimica Acta

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Catalytic and electro-catalytic oxidation of formic acid on the pure and Cu-modified Pd(111)-surface

Cited by 41 publications

References 66 publications

Electrocatalysis of formic acid on palladium and platinum surfaces: from fundamental mechanisms to fuel cell applications

Electrocatalysis of formic acid on palladium and platinum surfaces: from fundamental mechanisms to fuel cell applications

The Potassium-Induced Decomposition Pathway of HCOOH on Rh(111)

The influence of the crystal structure of TiO2 support material on Pd catalysts for formic acid electrooxidation

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