Mass transport enhancement in direct formic acid fuel cell with a novel channel design

Jałowiecka, Monika; Bojarska, Zuzanna; Małolepszy, Artur; Makowski, Łukasz

doi:10.1016/j.cej.2022.138474

Cited by 14 publications

(6 citation statements)

References 40 publications

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“…Moreover, high fuel utilization and cell power performance could be achieved with the utilization of high concentration of formic acid due to the low formic acid crossover. [2][3][4] Palladium (Pd)-based catalysts are preferred to be employed at the anode of DFAFC owing to the high initial activity toward formic acid electrooxidation (FAO) through a direct pathway (Equation ( 1)) without forming a large amount of poisoning CO ad intermediate species (Equation ( 2)). [5][6][7] HCOOH…”

Section: Introductionmentioning

confidence: 99%

Co and Ni Ratio Modulation‐Derived Electron Deficient Pd Trimetallic Catalysts for Enhanced Formic Acid Electrooxidation

Li,

Jiang,

Zhu

et al. 2024

ChemistrySelect

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PdCoNi trimetallic catalysts attracted extensive interest in direct formic acid fuel cells due to high poisoning resistance and high activity for formic acid electro‐oxidation (FAO). Herein, a series of Pd0.75CoxNiy/C alloys with a modulated ratio of Co and Ni are synthesized to investigate the effect of Co and Ni content on the electronic structure of Pd for FAO. The physical analysis demonstrated that the introduction of Co and Ni induces the lattice strain effect compared to monometallic Pd catalysts. As a consequence of fixing the total amount of Co and Ni, the strain effect is restricted, and the electronic perturbation of Pd is successfully regulated by varying the ratio of Co and Ni in Pd0.75CoxNiy/C trimetallic alloys. Pd loses more electrons, the bond strength of Pd−H is weakened, and FAO activity is enhanced first and then decreased as the Co content increases. Among the trimetallic catalysts, Pd0.75Co0.125Ni0.125/C trimetallic catalyst exhibits the highest current density of 3.253 mA cm−2 owing to the optimum electronic perturbation and Pd−H bond strength. This work provides a valuable guideline for future studies of Pd‐based trimetallic alloys.

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Section: Introductionmentioning

confidence: 99%

Co and Ni Ratio Modulation‐Derived Electron Deficient Pd Trimetallic Catalysts for Enhanced Formic Acid Electrooxidation

Li,

Jiang,

Zhu

et al. 2024

ChemistrySelect

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“…However, its wide application is still restricted by its poor durability, high cost, operational flexibility, and reliability. Recently, direct formic acid fuel cells (DFAFCs) as a novel energy and conversion device have attracted much attention due to the following advantages: (1) Nontoxic formic acid (FA) as fuel is safer for humans and the environment than that of methanol [ 3 , 5 ]; (2) because of the electrostatic repulsion between -SO 3 and HCOO-groups, the cross permeation of FA on Nafion membranes or proton exchange membranes is two orders of magnitude lower than that of methanol [ 6 , 7 ]; (3) FA has faster oxidation kinetics than methanol [ 8 , 9 ]; (4) FA is also a clean and renewable energy that can be obtained through biomass conversion processes. Additionally, recent progress in the electrochemical conversion of carbon dioxide into formic acid has directed considerable attention to DFAFCs.…”

Section: Introductionmentioning

confidence: 99%

“…(3) FA has faster oxidation kinetics than methanol [8,9]; (4) FA is also a clean and renewable energy that can be obtained through biomass conversion processes. Additionally, recent progress in the electrochemical conversion of carbon dioxide into formic acid has directed considerable attention to DFAFCs.…”

Section: Introductionmentioning

confidence: 99%

A Facile Preparation of Sandwich-Structured Pd/Polypyrrole-Graphene/Pd Catalysts for Formic Acid Electro-Oxidation

Qin

et al. 2023

Molecules

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Direct formic acid fuel cells (DFAFCs) are one of the most promising power sources due to its high conversion efficiency; relatively low carbon emissions, toxicity, and flammability; convenience; and low-cost storage and transportation. However, the key challenge to large-scale commercial applications is its poor power performance and the catalyst’s high preparation cost. In this study, a new sandwich-structured Pd/polypyrrole-graphene/Pd (Pd/PPy-Gns/Pd)-modified glassy carbon electrode (GCE) was prepared using a simple constant potential (CP) electrodeposition technique. On the basis of the unique synthetic procedure and structural advantages, the Pd/PPy-Gns/Pd shows a fast charge/mass transport rate, high electrocatalytic activity, and great stability for formic acid electro-oxidation (FAO). The mass activity of Pd/PPy-Gns/Pd electrode reaches 917 mA·mg−1Pd. The excellent catalytic activity is mainly due to the uniform embedding of Pd nanoparticles on the polypyrrole-graphene (PPy-Gns) support, which exposes more active sites, and prevents the shedding and inactivation of Pd nanoparticles. At the same time, the introduction of graphene (Gns) in the PPy further improved the conductivity of the catalyst and accelerated the transfer of electrons.

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“…4,28 Visualization of the water distribution is required for comprehensive investigation of the flooding behaviors at the catalyst layer. [29][30][31][32] In the last few decades, both numerical simulations and experimental observations have been conducted, including computational fluid dynamics (CFD) simulations, [33][34][35][36] neutron imaging, 29,[37][38][39] nuclear magnetic resonance (NMR) imaging, [40][41][42][43] electron microscopy, [44][45][46][47] and X-ray techniques. [48][49][50] However, the above-mentioned techniques usually stop at the GDL rather than the catalyst layer, which could be attributed to the complex parameters required for the simulation, including the temperature, ion concentration, and pressure, and the insufficient spatial and temporal resolutions for the characterization of the threephase interfaces based on the multiple-layered structure of FC devices.…”

Section: Introductionmentioning

confidence: 99%

Self-flooding behaviors on the fuel cell catalyst surface: an in situ mechanism investigation

Yang

Qin

et al. 2023

Energy Environ. Sci.

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Mass transport enhancement in direct formic acid fuel cell with a novel channel design

Cited by 14 publications

References 40 publications

Co and Ni Ratio Modulation‐Derived Electron Deficient Pd Trimetallic Catalysts for Enhanced Formic Acid Electrooxidation

Co and Ni Ratio Modulation‐Derived Electron Deficient Pd Trimetallic Catalysts for Enhanced Formic Acid Electrooxidation

A Facile Preparation of Sandwich-Structured Pd/Polypyrrole-Graphene/Pd Catalysts for Formic Acid Electro-Oxidation

Self-flooding behaviors on the fuel cell catalyst surface: an in situ mechanism investigation

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