Novel honeycomb nanosphere Au@Pt bimetallic nanostructure as a high performance electrocatalyst for methanol and formic acid oxidation

2014 ◽  
Vol 134 ◽  
pp. 411-417 ◽  
Author(s):  
Zhenguo Guo ◽  
Xin Zhang ◽  
Hui Sun ◽  
Xiaoping Dai ◽  
Ying Yang ◽  
...  
Keyword(s):  
Formic Acid ◽  
High Performance ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Bimetallic Nanostructure

scholarly journals Formic Acid Oxidation on Pd Thin Film Coated Au Nanocrystals

Surfaces ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 372-386 ◽  
Author(s):  
Yongan Tang ◽  
Shouzhong Zou
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Formic Acid ◽  
Single Crystals ◽  
High Performance ◽  
Formic Acid Oxidation ◽  
Oxidation Potential ◽  
Acid Oxidation ◽  
Band Theory ◽  
Gold Nanocrystals

Cubic, octahedral, and rhombic dodecahedral gold nanocrystals enclosed by {100}, {111}, and {110} facets, respectively, were prepared by a seed-mediated growth method at the room temperature. Palladium thin films were coated on these Au nanocrystals by a redox replacement approach to explore their catalytic activities. It is revealed that formic acid and carbon monoxide oxidation in 0.1 M HClO4 on Au nanocrystals coated with one monolayer (ML) of Pd are facet-dependent and resemble those obtained from corresponding Pd single crystals and Pd films deposited on bulk Au single crystals, suggesting epitaxial growth of Pd overlayers on the Au nanocrystal surfaces. As the Pd film thickness increased, formic acid oxidation current density decreased and the CO oxidation potential moved to more negative. The catalytic activity remained largely unchanged after 3–5 MLs of Pd deposition. The specific adsorption of (bi)sulfate was shown to hinder the formic acid oxidation and the effect decreased with the increasing Pd film thickness. These observations were explained in the framework of the d-band theory. This study highlights the feasibility of engineering high-performance catalysts through deposition of catalytically active metal thin films on facet-controlled inert nanocrystals.

Ultrathin AgPt alloy nanowires as a high-performance electrocatalyst for formic acid oxidation

Nano Research ◽  
2017 ◽  
Vol 11 (1) ◽  
pp. 499-510 ◽  
Author(s):  
Xian Jiang ◽  
Gengtao Fu ◽  
Xia Wu ◽  
Yang Liu ◽  
Mingyi Zhang ◽  
...  
Keyword(s):  
Formic Acid ◽  
High Performance ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Alloy Nanowires

scholarly journals PT-BI Co-Deposit Shell on AU Nanoparticle Core: High Performance and Long Durability for Formic Acid Oxidation

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1049
Author(s):  
Young Jun Kim ◽  
Hyein Lee ◽  
Hee-Suk Chung ◽  
Youngku Sohn ◽  
Choong Kyun Rhee
Keyword(s):  
Formic Acid ◽  
High Performance ◽  
Hydrogen Adsorption ◽  
Precursor Solution ◽  
Formic Acid Oxidation ◽  
Au Nanoparticle ◽  
Acid Oxidation ◽  
Irreversible Adsorption ◽  
Adsorption Method ◽  
Au Nps

This work presents the catalysts of Pt-Bi shells on Au nanoparticle cores and Pt overlayers on the Pt-Bi shells toward formic acid oxidation (FAO). Pt and Bi were co-deposited on Au nanoparticles (Au NP) via the irreversible adsorption method using a mixed precursor solution of Pt and Bi ions, and the amount of the co-deposits was controlled with the repetition of the deposition cycle. Rinsing of the co-adsorbed ionic layers of Pt and Bi with a H2SO4 solution selectively removed the Bi ions to leave Pt-rich and Bi-lean (<0.4 atomic %) co-deposits on Au NP (Pt-Bi/Au NP), conceptually similar to de-alloying. Additional Pt was deposited over Pt-Bi/Au NPs (Pt/Pt-Bi/Au NPs) to manipulate further the physicochemical properties of Pt-Bi/Au NPs. Transmission electron microscopy revealed the core–shell structures of Pt-Bi/Au NPs and Pt/Pt-Bi/Au NPs, whose shell thickness ranged from roughly four to six atomic layers. Moreover, the low crystallinity of the Pt-containing shells was confirmed with X-ray diffraction. Electrochemical studies showed that the surfaces of Pt-Bi/Au NPs were characterized by low hydrogen adsorption abilities, which increased after the deposition of additional Pt. Durability tests were carried out with 1000 voltammetric cycles between −0.26 and 0.4 V (versus Ag/AgCl) in a solution of 1.0 M HCOOH + 0.1 M H2SO4. The initial averaged FAO performance on Pt-Bi/Au NPs and Pt/Pt-Bi/Au NPs (0.11 ± 0.01 A/mg, normalized to the catalyst weight) was higher than that of a commercial Pt nanoparticle catalyst (Pt NP, 0.023 A/mg) by a factor of ~5, mainly due to enhancement of dehydrogenation and suppression of dehydration. The catalytic activity of Pt/Pt-Bi/Au NP (0.04 ± 0.01 A/mg) in the 1000th cycle was greater than that of Pt-Bi/Au NP (0.026 ± 0.003 A/mg) and that of Pt NP (0.006 A/mg). The reason for the higher durability was suggested to be the low mobility of surface Pt atoms on the investigated catalysts.

A High-Performance Bimetallic Pd-Cu Nanoparticles Membrane on Glassy Carbon Electrode for Formic Acid Oxidation

2013 ◽  
Vol 704 ◽  
pp. 264-269 ◽  
Author(s):  
Wei Wei ◽  
Yi Liu ◽  
Qi Jin Wan ◽  
Nian Jun Yang
Keyword(s):  
Formic Acid ◽  
Modified Electrode ◽  
High Performance ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Carbon Electrode ◽  
Mixed Solution ◽  
Glass Carbon Electrode ◽  
Cu Content ◽  
Glass Carbon

The Palladium-copper nanoparticles (PdCu NPs) have been prepared by potentiostatic electrodeposition from a mixture electrolyte of H2PdCl4 and CuSO4,then placed the electrode in sulfuric acid using cyclic voltammetry sweep a few laps to fabricate the PdCu NPs/glass carbon electrode (Pd-Cu/GCE). The modified electrode electrochemical properties of a preliminary study found that this modified electrode has good stability and electrochemical activity, experiments show that formic aicd has good voltammetric response of the electrode. The electrical activity of the formic acid in the Pd/GCE is lower than that in the Pd-Cu/GCE, this is due to the synergistic effect of the bimetal. When the Cu content is increased gradually in H2PdCl4 and CuSO4 a mixed solution, the formic acid oxidation peak currentlower, because Cu has no electrocatalytic activity for formic acid oxidation.

Size-controllable synthesis and high-performance formic acid oxidation of polycrystalline Pd nanoparticles

Rare Metals ◽  
2017 ◽  
Vol 38 (2) ◽  
pp. 115-121 ◽  
Author(s):  
Hui-Hui Wang ◽  
Jin-Feng Zhang ◽  
Ze-Lin Chen ◽  
Meng-Meng Zhang ◽  
Xiao-Peng Han ◽  
...  
Keyword(s):  
Formic Acid ◽  
High Performance ◽  
Pd Nanoparticles ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Controllable Synthesis

NANOELECTROCATALYSTS BASED PALLADIUM FOR FUEL CELLS WITH DIRECT OXIDATION OF FORMIC ACID

2019 ◽  
Vol 6 (3) ◽  
pp. 104-107
Author(s):  
Marina Vladimirovna Lebedeva ◽  
Alexey Petrovich Antropov ◽  
Alexander Victorovich Ragutkin ◽  
Nicolay Andreevich Yashtulov
Keyword(s):  
Formic Acid ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Electrode Materials ◽  
Formic Acid Oxidation ◽  
Energy Sources ◽  
Acid Oxidation ◽  
Direct Oxidation ◽  
Atomic Force ◽  
Formic Acid Oxidation Reaction

In paper electrode materials with palladium nanoparticles on polymer matrix substrates for energy sources have been formed. Nanocomposites were investigated by atomic force and scanning electron microscopy. The catalytic activity of formed electrodes in the formic acid oxidation reaction was evaluated by voltammetry method.

Sign in / Sign up

Export Citation Format

Share Document