High performance Pd-based catalysts for oxidation of formic acid

Wang, Rongfang; Liao, Shijun; Ji, Shan

doi:10.1016/j.jpowsour.2008.02.027

Cited by 156 publications

(76 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[2] In addition, the amperometric i-t curves ( Figure S4 in the Supporting Information) at a fixed potential of 0.3 V (the anodic working potential in DFAFCs) [5] show that the current density at 3600 s on the Pt-around-Au/C catalyst is 0.094 A mg À1 metal (5.7 times that on the Pt/C catalyst), which demonstrates that Pt-around-Au/C has much higher electrochemical stability towards formic acid oxidation. [36] As shown in Figure 3 B, the intensity of peak P II on Ptaround-Au/C is slightly lower than that on Pt/C, thus indicating slightly lower CO adsorption on Pt-around-Au/C, which corresponds to the relative values of Pt ESA in the two samples (CO does not adsorb on the surface of Au [21] ). So CO formation is not affected by Au NPs in Pt-around-Au/C.…”

mentioning

confidence: 87%

Electrostatic Self‐Assembly of a Pt‐around‐Au Nanocomposite with High Activity towards Formic Acid Oxidation

Zhang¹,

Shao²,

Yin³

et al. 2010

Angew Chem Int Ed

301

168

View full text Add to dashboard Cite

mentioning

confidence: 87%

Electrostatic Self‐Assembly of a Pt‐around‐Au Nanocomposite with High Activity towards Formic Acid Oxidation

Zhang¹,

Shao²,

Yin³

et al. 2010

Angew Chem Int Ed

301

168

View full text Add to dashboard Cite

“…In order to achieve high current density and durability, Pd-based bimetallic nanocatalysts and adatom modified Pd catalysts have been used. [13][14][15][16][17][18][19] The electrocatalytic performance of these catalysts depends on the crystallographic orientation, composition, size and shape of the particles. [15][16][17] 950 Sourov Ghosh and C Retna Raj Among the various nanoscale bimetallic nanocatalysts, Pt-Pd is demonstrated to have high electrocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Pt-Pd nanoelectrocatalyst of ultralow Pt content for the oxidation of formic acid: Towards tuning the reaction pathway

Ghosh

Raj

2015

J Chem Sci

View full text Add to dashboard Cite

Synthesis of highly efficient functional electrocatalyst that favours the electrochemical oxidation of formic acid via CO-free dehydrogenation pathway is required for direct formic acid fuel cells. Traditional catalysts favour the dehydration pathway involving the generation of poisonous CO. Herein we demonstrate the superior electrocatalytic performance of Pt-Pd bimetallic nanoelectrocatalyst of ultralow Pt content and tuning the reaction pathway by controlling the Pt content. Bimetallic nanoparticles of Pt 4 Pd 96 , Pt 7 Pd 93 and Pt 47 Pd 53 compositions are synthesized by electrochemical co-deposition method in aqueous solution. The nanoparticles of ultralow Pt content, Pt 4 Pd 96 , favour the CO-free dehydrogenation pathway for formic acid oxidation with an onset potential of 0 V (SHE) whereas the Pt 47 Pd 53 nanoparticles favour the dehydration pathway involving the formation of CO at high positive potential. The Pt content of the bimetallic nanoparticles actually controls the oxidation peak potential and catalytic activity. Significant negative shift (∼350 mV) in the oxidation peak potential and remarkable enhancement in the current density (2.6 times) are observed for Pt 4 Pd 96 nanoparticles with respect to Pt 47 Pd 53 . The absence of three adjacent Pt and Pd atoms could be the reason for the suppression of CO pathway. The electrochemical impedance measurements indirectly support the CO-free pathway for the formic acid oxidation on Pt 4 Pd 96 nanoparticles.

show abstract

“…It has been shown that addition of the second metal, such as Au [2,13], and Co [15], increases the activity of Pd-based anode catalysts for formic acid electrooxidation. Also, the promoting effect of the second metal, such as Au [16][17][18][19], Ru [17], Pb [20], Bi [21,22] and Ir [23,24], has been demonstrated for Pt-based anode catalysts in DFAFC.…”

Section: Introductionmentioning

confidence: 99%

Palladium and Palladium Gold Catalysts Supported on MWCNTs for Electrooxidation of Formic Acid

Chen

Liou

et al. 2010

Fuel Cells

View full text Add to dashboard Cite

Novel multi‐wall carbon nanotubes (MWCNTs) supported Pd–Au catalyst for electrooxidation of formic acid was prepared and compared with a similarly prepared Pd/MWCNTs and with a commercial Pt–Ru/Vulcan catalyst. The catalysts were prepared by a two‐stage polyol method, followed by H2–Ar annealing and were characterised by using X‐ray diffraction, FE‐TEM and EDX. Cyclic voltammetry (CV) was used to test their catalytic activity towards formic acid electrooxidation and accessible metal surface in the catalyst layer. In the case of the precursor of Pd–Au/MWCNTs catalyst (before H2–Ar annealing), subsequent deposition of Pd and Au led to a material of the core‐shell structure, catalytically inactive. Annealing of the core shell Pd–Au/MWCNTs precursor in H2–Ar resulted in the formation of the novel Pd–Au/MWCNTs catalyst. A highly dispersed Pd–Au solid solution (average XRD particle size 4.8 nm) is formed, and the novel catalyst is more active than the Pd/MWCNTs one. Both the Pd–Au/MWCNTs and the Pd/MWCNTs catalysts turned out to be more active than a commercial, highly dispersed Pt–Ru/Vulcan catalyst.

show abstract

High performance Pd-based catalysts for oxidation of formic acid

Cited by 156 publications

References 21 publications

Electrostatic Self‐Assembly of a Pt‐around‐Au Nanocomposite with High Activity towards Formic Acid Oxidation

Electrostatic Self‐Assembly of a Pt‐around‐Au Nanocomposite with High Activity towards Formic Acid Oxidation

Pt-Pd nanoelectrocatalyst of ultralow Pt content for the oxidation of formic acid: Towards tuning the reaction pathway

Palladium and Palladium Gold Catalysts Supported on MWCNTs for Electrooxidation of Formic Acid

Contact Info

Product

Resources

About