Ultrathin Platinum Films for Methanol and Formic Acid Oxidation: Activity as a Function of Film Thickness and Coverage

ACS Catalysis ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2124-2136 ◽  
Author(s):  
Sang Hyun Ahn ◽  
Yihua Liu ◽  
Thomas P. Moffat
Keyword(s):  
Film Thickness ◽  
Formic Acid ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Oxidation Activity

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.

Ligand‐Mediated Self‐Terminating Growth of Single‐Atom Pt on Au Nanocrystals for Improved Formic Acid Oxidation Activity

2021 ◽  
pp. 2103195
Author(s):  
Moxuan Liu ◽  
Zhaojun Liu ◽  
Miao Xie ◽  
Zhixue Zhang ◽  
Shumeng Zhang ◽  
...  
Keyword(s):  
Formic Acid ◽  
Formic Acid Oxidation ◽  
Single Atom ◽  
Acid Oxidation ◽  
Oxidation Activity

Sulfite modification of platinum nanoparticles modulates electrocatalytic formic acid oxidation activity

2020 ◽  
Vol 22 (17) ◽  
pp. 5838-5844
Author(s):  
Moxuan Liu ◽  
Shumeng Zhang ◽  
Zhixue Zhang ◽  
Zhaojun Liu ◽  
Kai Liu ◽  
...  
Keyword(s):  
Formic Acid ◽  
Platinum Nanoparticles ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Pt Catalysts ◽  
Oxidation Activity

A facile post-synthetic modification of commercial Pt catalysts by sulfite leads to significantly enhanced formic acid oxidation activity.

Ternary Pd–Ni–P hybrid electrocatalysts derived from Pd–Ni core–shell nanoparticles with enhanced formic acid oxidation activity

2016 ◽  
Vol 52 (74) ◽  
pp. 11143-11146 ◽  
Author(s):  
Xin Liang ◽  
Bo Liu ◽  
Juntao Zhang ◽  
Siqi Lu ◽  
Zhongbin Zhuang
Keyword(s):  
Formic Acid ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Oxidation Activity ◽  
Highly Active ◽  
Oxidation Performance ◽  
Electro Oxidation ◽  
Core Shell Nanoparticles

Highly active formic acid electro-oxidation performance was achieved by using ternary Pd–Ni–P hybrid electro-catalysts with a strong synergistic effect.

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.

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