Introduction: Low-Temperature Fuel Cells

Napporn, Têko W.; Mokrini, Asmae; Rodríguez-Varela, F.J.

doi:10.1007/978-3-319-99019-4_1

Cited by 5 publications

(12 citation statements)

References 182 publications

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“…From a components point of view, the direct methanol fuel cells (DMFCs) resemble the polymer electrolyte membrane fuel cells (PEMFCs). As an example, supported Pt nanocatalysts are widely used to promote the methanol oxidation reaction (MOR) . There is, however, a fundamental difference: the former utilizes an organic molecule (methanol, CH 3 OH) to generate electric energy.…”

Section: Introductionmentioning

confidence: 99%

“…As an example, supported Pt nanocatalysts are widely used to promote the methanol oxidation reaction (MOR). [1][2][3] There is, however, a fundamental difference: the former utilizes an organic molecule (methanol, CH 3 OH) to generate electric energy. Being a liquid fuel, CH 3 OH has the advantage of easiness of transport and storage over hydrogen used in PEMFCs.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] There is, however, a fundamental difference: the former utilizes an organic molecule (methanol, CH 3 OH) to generate electric energy. Being a liquid fuel, CH 3 OH has the advantage of easiness of transport and storage over hydrogen used in PEMFCs. [1][2][3] Nevertheless, the main disadvantage of the methanol oxidation reaction (MOR) is that proceeds via a complex multi-step mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…Being a liquid fuel, CH 3 OH has the advantage of easiness of transport and storage over hydrogen used in PEMFCs. [1][2][3] Nevertheless, the main disadvantage of the methanol oxidation reaction (MOR) is that proceeds via a complex multi-step mechanism. CH 3 OH molecules adsorb on the active sites, followed by CÀ H bonds cleavage and dehydrogenation.…”

Section: Introductionmentioning

confidence: 99%

“…[6] This process is known as the bifunctional mechanism and several works have pointed out to the higher catalytic activity of PtÀ Ru/C for the MOR, compared to Pt/C. [7][8][9] Also relevant in enhancing the performance of PtÀ Ru based nanocatalysts for the oxidation of CH 3 OH are the metal-support interactions. [5,[10][11][12] It has been reported that the sp 3 -sp 2 carbon nanodomains have an important influence on several relevant aspects of Pt nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Siller-Ceniceros¹,

Sánchez-Castro²,

Morales-Acosta

et al. 2019

ChemElectroChem

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An efficient route to chemically functionalize reduced graphene oxide (rGO) with ruthenium organometallic compounds and the subsequent anchorage of Pt nanoparticles is reported. Two organometallic complexes, [(η6‐C6H5OCH2CH2OH) RuCl2]2 (Ru‐dim) and [(η6‐C6H4(CHMe2)Me)RuCl2]2 (Ru‐cym), as well as commercial RuCl3 ⋅ XH2O (Ru‐com) have been synthetized an used as functionalizing agents. By implementing a conventional polyol synthesis method, the Pt/rGORu‐dim, Pt/rGORu‐cym, Pt/rGORu‐com and Pt/rGO nanocatalysts have been synthetized. Characterization by XRD indicates that the presence of Ru leads to the formation of Pt−Ru alloyed phases due to overlapping of Pt fcc and Ru hcp reflections. When characterized for the methanol oxidation reaction (MOR) in acid media, Pt/rGORu‐dim reached a mass current density of 491.49 mA mgPt−1, higher than those generated by the other nanocatalysts. The results show that the functionalization of rGO with Ru‐dim remarkably increases the catalytic activity of Pt for the MOR, suggesting Pt−Ru metal−metal interactions that promotes the anodic reaction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Siller-Ceniceros¹,

Sánchez-Castro²,

Morales-Acosta

et al. 2019

ChemElectroChem

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Another Chance for Classic AFCs? Experimental Investigation of a Cost‐Efficient Unitized Regenerative Alkaline Fuel Cell, Using Platinum‐Free Gas Diffusion Electrodes

Wagner

Kohnke²

2020

Fuel Cells

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The big challenge of global phase-down of carbon dioxide emissions leads us to alternatives in storing electric energy from renewable sources. For the worldwide use of batteries and fuel cells very high amounts of precious electrode materials are needed. Batteries require rare earth metals and environmentally harmful Lithium, PEM fuel cells require noble platinum and iridium. Thus, an economical and eco-friendly alternative to lithium-ion-batteries should be found, especially for the use in domestic homes. In the on-hand work, a well-known type of fuel cell is revised and considered in the new context of global material usage. Therefore, an alkaline fuel cell with the classic design of an electrolyte gap inbetween the electrodes is observed. Gas-diffusion-electrodes are used, based on Raney-nickel. Results are given for different catalysts: Raney-nickel, Raney-silver, manganic-oxide, carbon and ruthenium. For the analysis current-voltage-characteristics, chronopotentiometry and SEM micrographs are used. The results are discussed in comparison to a unitized reversible PEM fuel cell. At low current density, the alkaline cell is obtaining round-trip efficiencies close to 70%, while the PEM cell achieves only 60% efficiency. With Silver-catalyst clear higher efficiencies up to 80% are presentable. The PEM fuel cell shows obvious better performance at high current densities.

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Bifunctional Pd‐CeO₂ Nanorods/C Nanocatalyst with High Electrochemical Stability and Catalytic Activity for the ORR and EOR in Alkaline Media

et al. 2020

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The catalytic activity and electrochemical stability of Pd-CeO 2-NR /C (CeO 2-NR : cerium oxide nanorods) for the Oxygen Reduction Reaction (ORR) and the Ethanol Oxidation Reaction (EOR) is shown in alkaline media and compared to Pd/C. Evaluation of catalytic activity for the ORR in a Rotating Ring Disc Electrode (RRDE) setup , shows that Pd-CeO 2-NR /C promotes the reaction with a percentage of hydrogen peroxide production (%H 2 O 2) around 2-4 %, and an electron transfer number (n) close to 4. Tafel plots demonstrates higher mass and specific activities of Pd-CeO 2-NR /C than Pd/C. Moreover, from cyclic voltammetry tests, Pd-CeO 2-NR /C shows a higher mass catalytic activity (j m = 697 mA mg À 1 Pd) for the EOR at a more negative onset potential (E onset = 0.29 V/RHE) than Pd/C. After Accelerated Degradation Tests (ADT), Pd-CeO 2-NR /C retains ∼ 98 % of its Electrochemically Active Surface Area (ECSA), higher than ∼ 51 % of Pd/C. After ADT, the performance of Pd-CeO 2-NR /C remains similar for the ORR, while it is significantly higher for the EOR, compared to Pd/C. Thus, the addition of CeO 2-NR enhances the electrocatalytic behavior and stability of Pd towards the ORR and the EOR.

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Introduction: Low-Temperature Fuel Cells

Cited by 5 publications

References 182 publications

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Another Chance for Classic AFCs? Experimental Investigation of a Cost‐Efficient Unitized Regenerative Alkaline Fuel Cell, Using Platinum‐Free Gas Diffusion Electrodes

Bifunctional Pd‐CeO₂ Nanorods/C Nanocatalyst with High Electrochemical Stability and Catalytic Activity for the ORR and EOR in Alkaline Media

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Introduction: Low-Temperature Fuel Cells

Cited by 5 publications

References 182 publications

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Functionalizing Reduced Graphene Oxide with Ru‐Organometallic Compounds as an Effective Strategy to Produce High‐Performance Pt Nanocatalysts for the Methanol Oxidation Reaction

Another Chance for Classic AFCs? Experimental Investigation of a Cost‐Efficient Unitized Regenerative Alkaline Fuel Cell, Using Platinum‐Free Gas Diffusion Electrodes

Bifunctional Pd‐CeO2 Nanorods/C Nanocatalyst with High Electrochemical Stability and Catalytic Activity for the ORR and EOR in Alkaline Media

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Bifunctional Pd‐CeO₂ Nanorods/C Nanocatalyst with High Electrochemical Stability and Catalytic Activity for the ORR and EOR in Alkaline Media