Understanding small-molecule electro-oxidation on palladium based compounds – a feature on experimental and theoretical approaches

2018 ◽  
Vol 47 (24) ◽  
pp. 7864-7869 ◽  
Author(s):  
Saurav Ch. Sarma ◽  
Sebastian C. Peter
Keyword(s):  
Fuel Cells ◽  
Formic Acid ◽  
Small Molecules ◽  
Electrochemical Oxidation ◽  
Small Molecule ◽  
Energy Production ◽  
Green Energy ◽  
Theoretical Approaches ◽  
Electro Oxidation

Electrochemical oxidation of small molecules such as ethanol, methanol and formic acid on Pd based compounds has a great impact on green energy production in fuel cells.

Chemically designed CeO2 nanoboxes boost the catalytic activity of Pt nanoparticles toward electro-oxidation of formic acid

2017 ◽  
Vol 5 (23) ◽  
pp. 11572-11576 ◽  
Author(s):  
Swetha Ramani ◽  
Sumanta Sarkar ◽  
Vamseedhara Vemuri ◽  
Sebastian C. Peter
Keyword(s):  
Catalytic Activity ◽  
Formic Acid ◽  
Electrochemical Oxidation ◽  
Pt Nanoparticles ◽  
Chemical Parameters ◽  
Electro Oxidation

CeO2 nanoboxes designed by controlling various chemical parameters enhance both the efficiency and stability of Pt nanoparticles towards the electrochemical oxidation of formic acid.

scholarly journals On the electro-oxidation of small organic molecules: towards a fuel cell catalyst testing platform

2021 ◽  
Author(s):  
Damin Zhang ◽  
Jia Du ◽  
Jonathan Quinson ◽  
Matthias Arenz
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Formic Acid ◽  
Organic Molecules ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Proton Exchange ◽  
Electrochemical Cells ◽  
Small Organic Molecules ◽  
Electro Oxidation

The electrocatalytic oxidation of small organic compounds such as methanol or formic acid has been the subject of numerous investigations in the last decades. The motivation for these studies is often their use as fuel in so-called direct methanol or direct formic acid fuel cells, promising alternatives to hydrogen-fueled proton exchange membrane fuel cells. The fundamental research spans from screening studies to identify the best performing catalyst materials to detailed mechanistic investigations of the reaction pathway. These investigations are commonly performed in standard three electrode electrochemical cells with a liquid supporting electrolyte to which the methanol or formic acid is added. In fuel cell devices, however, no liquid electrolyte will be present, instead membrane electrolytes are used. The question therefore arises, to which extend results from conventional electrochemical cells can be extrapolated to conditions found in fuel cells. We previously developed a gas diffusion electrode setup to mimic “real-life” reaction conditions and study electrocatalysts for oxygen gas reduction or water splitting. It is here demonstrated that the setup is also suitable to investigate the properties of catalysts for the electro-oxidation of small organic molecules. Using the gas diffusion electrode setup, it is seen that employing a catalyst - membrane electrolyte interface as compared to conventional electrochemical cells can lead to significantly different catalyst performances. Therefore, it is recommended to implement gas diffusion electrode setups for the investigation of the electro-oxidation of small organic molecules.

Synergistic effect of graphene and multi-walled carbon nanotubes composite supported Pd nanocubes on enhancing catalytic activity for electro-oxidation of formic acid

2016 ◽  
Vol 6 (13) ◽  
pp. 4794-4801 ◽  
Author(s):  
Ammar Bin Yousaf ◽  
M. Imran ◽  
Akif Zeb ◽  
Xiao Xie ◽  
Kuang Liang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Fuel Cells ◽  
Synergistic Effect ◽  
Formic Acid ◽  
Multi Walled Carbon Nanotubes ◽  
Electro Oxidation ◽  
Walled Carbon Nanotubes ◽  
Formic Acid Fuel Cells ◽  
Supported Pd

Synergistic effect of rGO/MWCNTs composite supported Pd nanocubes enhanced the performance of direct formic acid fuel cells.

Electro-oxidation of methanol and formic acid on PtRu and PtAu for direct liquid fuel cells

2006 ◽  
Vol 163 (1) ◽  
pp. 71-75 ◽  
Author(s):  
Jong-Ho Choi ◽  
Kyoung-Jin Jeong ◽  
Yujung Dong ◽  
Jonghee Han ◽  
Tae-Hoon Lim ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Formic Acid ◽  
Liquid Fuel ◽  
Oxidation Of Methanol ◽  
Electro Oxidation

scholarly journals Direct Liquid Fuel Cells – The Influence of Temperature and Dynamic Instabilities

2020 ◽  
Author(s):  
Jéssica Alves Nogueira ◽  
Hamilton Varela
Keyword(s):  
Fuel Cells ◽  
Formic Acid ◽  
Dimethyl Ether ◽  
Liquid Fuel ◽  
Catalyst Surface ◽  
Proton Exchange ◽  
Experimental Investigations ◽  
Experimental Conditions ◽  
Potential Oscillations ◽  
Electro Oxidation

The interconversion between chemical and electrical energies plays a pivotal role in the challenge for a sustainable future. Proton exchange membrane (PEMFC) based on the electro-oxidation of hydrogen and reduction of oxygen comprise a relatively mature technology of indisputable relevance. Alternatively, some open questions concerning the use of Direct Liquid Fuel Cells (DLFC) call for further experimental investigations on these systems. In this paper we evaluate the temperature effect on DLFCs under conventional and oscillatory conditions. We studied four molecules: methanol, formic acid, ethanol, and dimethyl ether. The use of identical experimental conditions allowed at studying the role of the fuel on the DLFC performance, providing thus reference values for future investigations. Under regular, non-oscillatory regime, we observed for all cases that the overpotential decreases as the temperature increases mainly because water activation on the catalyst surface is facilitated at high temperatures. By mapping the conditions where oscillatory kinetics manifest itself under galvanostatic mode, only the electro-oxidation of dimethyl ether did not exhibit potential oscillations. The relationship between oscillatory frequency and temperature during the methanol and formic acid electro-oxidation followed a conventional Arrhenius dependence, whereas with ethanol there was no straightforward trend, and temperature compensation prevails. The atypical behavior found for ethanol was addressed in terms of its main electrocatalytic poisons: adsorbed CO and acetate. The absence of oscillations during dimethyl ether electro-oxidation was attributed to its weak interaction with the catalyst surface.<br>

New Pd/Co–Ni electrocatalysts for formic acid electrooxidation and their fabrication from inorganic precursor [Co0.14Ni1.86(dipic)2(phen)2(H2O)2]·4H2O

2020 ◽  
Vol 49 (44) ◽  
pp. 15864-15873
Author(s):  
Sania Saheli ◽  
Ali Reza Rezvani ◽  
Zahra Yavari ◽  
Michal Dusek ◽  
Monika Kucerakova
Keyword(s):  
Fuel Cells ◽  
Formic Acid ◽  
Electrochemical Sensors ◽  
Inorganic Precursor ◽  
Electro Oxidation ◽  
Oxide Composites ◽  
Ni Oxide ◽  
Formic Acid Electrooxidation

Novel Pd/Co–Ni oxide composites were developed as electrocatalysts for formic acid electro-oxidation as a process that can be utilised in fuel cells and electrochemical sensors.

scholarly journals Bifunctional Tailoring of Platinum Surfaces with Earth Abundant Iron Oxide Nanowires for Boosted Formic Acid Electro-Oxidation

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Bilquis Ali Al-Qodami ◽  
Heba H. Farrag ◽  
Sayed Youssef Sayed ◽  
Nageh K. Allam ◽  
Bahgat E. El-Anadouli ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Formic Acid ◽  
Electrochemical Impedance ◽  
Bulk Composition ◽  
Catalytic Efficiency ◽  
Catalytic Performance ◽  
Electrochemical Impedance Spectra ◽  
X Ray ◽  
Electro Oxidation ◽  
Formic Acid Fuel Cells

To expedite the marketing of direct formic acid fuel cells, a peerless inexpensive binary FeOx/Pt nanocatalyst was proposed for formic acid electro-oxidation (FAO). The roles of both catalytic ingredients (FeOx and Pt) were inspired by testing the catalytic performance of FAO at the FeOx/Au and FeOx/GC analogies. The deposition of FeOx proceeded electrochemically with a post‐activating step that identified the catalyst’s structure and performance. With a proper adaptation for the deposition and activation processes, the FeOx/Pt nanocatalyst succeeded to mitigate the typical CO poisoning that represents the principal element deteriorating the catalytic performance of the direct formic acid fuel cells. It also provided a higher (eightfold) catalytic efficiency than the bare Pt substrates toward FAO with a much better durability. Field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) were all employed to inspect, respectively, the surface morphology, bulk composition, and crystal structure of the catalyst. The electrochemical impedance spectra could correlate the charge transfer resistances for FAO over the inspected set of catalysts to explore the role of FeOx in mediating the reaction mechanism.

Fe2P as a novel efficient catalyst promoter in Pd/C system for formic acid electro-oxidation in fuel cells reaction

2018 ◽  
Vol 375 ◽  
pp. 37-42 ◽  
Author(s):  
Fulong Wang ◽  
Huaiguo Xue ◽  
Zhiqun Tian ◽  
Wei Xing ◽  
Ligang Feng
Keyword(s):  
Fuel Cells ◽  
Formic Acid ◽  
Efficient Catalyst ◽  
Electro Oxidation

Nanostructured palladium catalyst poisoning depressed by cobalt phosphide in the electro-oxidation of formic acid for fuel cells

Nano Energy ◽  
2016 ◽  
Vol 30 ◽  
pp. 355-361 ◽  
Author(s):  
Ligang Feng ◽  
Jinfa Chang ◽  
Kun Jiang ◽  
Huaiguo Xue ◽  
Changpeng Liu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Formic Acid ◽  
Palladium Catalyst ◽  
Catalyst Poisoning ◽  
Cobalt Phosphide ◽  
Electro Oxidation
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