Synthesis of a Small Amorphous PdMo/C Nanocatalyst and Pd Nanocubes Enclosed within (100) Planes and Their Use for Ethylene Glycol Electro–oxidation

Ambriz-Peláez, Oscar; Álvarez‐Contreras, Lorena; Guerra‒Balcázar, Minerva; Ledesma‐García, J.; Arriaga, L.G.; Arjona, Noé

doi:10.1002/celc.201600856

Cited by 15 publications

(4 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mass specific activity of PdSn/rGO hybrid material is 4.5–5 times higher than that of Pd 3 Sn 2 /rGO and PdSn 2 /rGO hybrid intermetallics (Figure B). The ratio of the forward and the backward peak current ( i f / i b ) indicates the measure of tolerance of the EGOR catalyst toward intermediate carbonaceous species . The ( i f / i b ) ratio of Pd 3 Sn 2 /rGO, PdSn/rGO, and PdSn 2 /rGO hybrid catalyst is calculated to be 2.95, 3.44, and 2.24, respectively.…”

Section: Resultsmentioning

confidence: 99%

Bifunctional Electrocatalytic Activity of Ordered Intermetallics Based on Pd and Sn

et al. 2020

View full text Add to dashboard Cite

Structurally ordered intermetallic compounds are proven to be very promising for electrocatalysis owing to the homogeneous distribution of active sites, thermodynamic stability, and resistance toward surface rearrangement. Herein, we demonstrate a facile route for the synthesis of Sn-and Pd-based ordered intermetallics hybridized with reduced graphene oxide (rGO) and their bifunctional electrocatalytic performance toward oxygen reduction (ORR) and ethylene glycol oxidation reactions (EGOR). The coreduction of SnCl 2 and K 2 PdCl 4 in 1,5pentanediol in the presence of graphene oxide and the subsequent thermal annealing in an inert atmosphere affords rGO hybridized intermetallics of three phases: primitive orthorhombic PdSn, base-centered orthorhombic PdSn 2 , and hexagonal Pd 3 Sn 2 . The electrocatalytic performance of the hybrid intermetallics toward EGOR and ORR is evaluated in alkaline and acidic electrolytes. Among the three intermetallics, PdSn has excellent electrocatalytic performance toward EGOR and ORR. The PdSn/rGO hybrid catalyst outperforms the other two intermetallics toward EGOR in alkaline pH and ORR in acidic as well as alkaline pH in terms of onset potential and mass specific activity. The enhanced performance of PdSn/rGO catalyst is attributed to (i) a change in the Pd dband center, (ii) a Pd−Pd interatomic distance in a unit cell, and (iii) weak adsorption of in-situ-generated oxygen-containing intermediates species. The lattice strain due to the presence of dissimilarly sized Sn and Pd in a unit cell and the high oxophilicity of Sn downshifts the d-band center of Pd and facilitate the electron transfer kinetics. The catalyst support, rGO, prevents the unwanted aggregation of the active catalyst. The density functional theory calculations show that the oxygen-containing species weakly adsorb on the PdSn surface compared to the other intermetallics, supporting the high electrocatalytic activity of PdSn/rGO.

show abstract

Section: Resultsmentioning

confidence: 99%

Bifunctional Electrocatalytic Activity of Ordered Intermetallics Based on Pd and Sn

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The composite Pd/Fe 2 O 3 –CB shows improved catalytic activity with the highest current density compared to reported PdMo/CNTs, PdCu/CNFs, Pd 1 Au 1 /CNSs, and Pd 2 Pb 1 /NCs. [ 35,39–41 ] The increased activity of our reported electrocatalysts is ascribed to successful Pd‐Fe alloy, which changes the electronic structure of Pd and enhances the activity of the electrocatalyst towards EGOR.…”

Section: Resultsmentioning

confidence: 94%

Iron Oxide‐Carbon Black Promotional Effect on Palladium Nanoparticles Toward Ethylene Glycol Oxidation in Alkaline Medium: Experimental and Computational Studies

Chabalala,

Matthews,

Mbokazi

et al. 2023

Energy Tech

View full text Add to dashboard Cite

Direct alcohol fuel cells are the next‐generation energy sources of the future due to their high power density. Palladium electrocatalysts are promising prospects for enhancing alcohol oxidation in alkaline media, but the higher cost and susceptibility to CO poisoning limit their application and commercialization. Thus, there is a need to improve the performance of the Pd electrocatalysts by utilizing a double supporting system. A microwave‐assisted polyol method is used to synthesize the palladium nanoparticles supported on iron oxide‐carbon black material (Pd/Fe2O3‐CB). Physiochemical and electrochemical characterization of the obtained electrocatalysts materials is conducted to study morphology and the electrochemical behaviour of the as‐synthesized electrocatalysts. The Pd/Fe2O3‐CB displayed higher kinetics approved by a higher current density of 58.7 mA cm−2, stability, and durability, owing to Fe2O3, and CB incorporation. Density functional theory (DFT) proves that C from CO has more robust interactions with surface Pd, thereby explaining the stronger C‐O binding property of Pd. The orbital analysis revealed that 3d orbitals of Pd participate in the hybridization with 2p orbitals of C and O. As a result, the overlap between C2p and Pd3d/Fe3d orbitals significantly broadened, leading to solid adsorption of CO over Pd/Fe2O3.

show abstract

“…We also detected 1% of a mixture of glyceraldehyde, dihydroxyacetone, glycolate, and glycerate. This impressive selectivity in mild conditions is a sum of diluted electrolyte and potential application for 9 h to a high extent of the preferential Pd(100) surface, since the surfaces of cubes are doubtless built by (100) structures. − The improved activity of the modified and nonmodified (100) surface of Pd nanocubes has been previously reported for the electro-oxidation of organic molecules. ,− To rationalize the reaction pathway, we need to revisit the suggested paths found in the literature.…”

Section: Resultsmentioning

confidence: 99%

3D-Printed Electrolyzer for the Conversion of Glycerol into Tartronate on Pd Nanocubes

Guima

Alencar

Silva³

et al. 2017

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Glycerol is a massive byproduct of biodiesel fabrication, which decreases its price and increases the risks of inadequate disposal. In this sense, more environmentally friendly instruments and processes using glycerol are required to make this matrix more valuable. Here, a 3D-printed electrolyzer was developed and tested for long-period glycerol electrolysis in an alkaline medium. The new electrolyzer contains only three mobile parts and can be manufactured in less than 4 h using ∼30 g of polylactic acid filament, with a total cost of less than US $5. This easily built and inexpensive reduced-scale electrolyzer has the advantage of using only a few milliliters of solution to perform tests for electrosynthesis. We synthesized Pd nanocubes to modify a glassy carbon working electrode, which was used for glycerol electrolysis. We found a remarkable selectivity of 99% toward tartronate production, which was induced by the extended (100) surface of Pd in the alkaline medium. Hence, we report a new 3D-printed platform for electrosynthesis and a new clean one-step method to produce tartronate.

show abstract

Synthesis of a Small Amorphous PdMo/C Nanocatalyst and Pd Nanocubes Enclosed within (100) Planes and Their Use for Ethylene Glycol Electro–oxidation

Cited by 15 publications

References 51 publications

Bifunctional Electrocatalytic Activity of Ordered Intermetallics Based on Pd and Sn

Bifunctional Electrocatalytic Activity of Ordered Intermetallics Based on Pd and Sn

Iron Oxide‐Carbon Black Promotional Effect on Palladium Nanoparticles Toward Ethylene Glycol Oxidation in Alkaline Medium: Experimental and Computational Studies

3D-Printed Electrolyzer for the Conversion of Glycerol into Tartronate on Pd Nanocubes

Contact Info

Product

Resources

About