Noncovalent Integration of a Bioinspired Ni Catalyst to Graphene Acid for Reversible Electrocatalytic Hydrogen Oxidation

Reuillard, Bertrand; Blanco, Miriam; Calvillo, Laura; Coutard, Nathan; Ghedjatti, Ahmed; Chenevier, Pascale; Agnoli, Stefano; Otyepka, Michal; Granozzi, Gaetano; Artero, Vincent

doi:10.1021/acsami.9b18922

Cited by 33 publications

(44 citation statements)

References 78 publications

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“…Finally, a new group of materials has been used as anodes, including bioinspired nickel bis-diphosphine, supported on different unconventional carbon materials, i.e., CNT [ 293 ] and graphene acid [ 294 ], which are beginning to gain attention. However, they need to be studied carefully to assess their feasibility.…”

Section: Electrocatalysts and Electrodesmentioning

confidence: 99%

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Tellez-Cruz¹,

et al. 2021

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The study of the electrochemical catalyst conversion of renewable electricity and carbon oxides into chemical fuels attracts a great deal of attention by different researchers. The main role of this process is in mitigating the worldwide energy crisis through a closed technological carbon cycle, where chemical fuels, such as hydrogen, are stored and reconverted to electricity via electrochemical reaction processes in fuel cells. The scientific community focuses its efforts on the development of high-performance polymeric membranes together with nanomaterials with high catalytic activity and stability in order to reduce the platinum group metal applied as a cathode to build stacks of proton exchange membrane fuel cells (PEMFCs) to work at low and moderate temperatures. The design of new conductive membranes and nanoparticles (NPs) whose morphology directly affects their catalytic properties is of utmost importance. Nanoparticle morphologies, like cubes, octahedrons, icosahedrons, bipyramids, plates, and polyhedrons, among others, are widely studied for catalysis applications. The recent progress around the high catalytic activity has focused on the stabilizing agents and their potential impact on nanomaterial synthesis to induce changes in the morphology of NPs.

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Section: Electrocatalysts and Electrodesmentioning

confidence: 99%

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Tellez-Cruz¹,

et al. 2021

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“…Inspired by hydrogenases, Artero and co‐workers developed Ni‐based arginine‐containing derivatives [Ni II (P 2 Cy N 2 Arg ) 2 ] 7+ (NiArg) integrated with graphene acid (GA), as illustrated in Figure 3g. [ 71 ] Figure 3h shows the CV curves in 0.5 m H 2 SO 4 , where 2 µL of 5 × 10 −3 m NiArg are deposited on a gas diffusion layer with different GA loadings. The HOR current increases with GA loadings, and the composite electrode shows a maximum current density of about 40 mA cm −2 at 0.4 V versus RHE with a GA loading of 0.8 mg cm −2 .…”

Section: Non‐pgm Electrocatalysts For the Acidic Hormentioning

confidence: 99%

“…This result demonstrates the great potential of GA with regard to improving the catalyst loading and managing the porosity within nanostructured electrodes, which is vital to achieving a high catalytic current with PGM‐free electrocatalysts. [ 71 ]…”

Section: Non‐pgm Electrocatalysts For the Acidic Hormentioning

confidence: 99%

Non‐Platinum Group Metal Electrocatalysts toward Efficient Hydrogen Oxidation Reaction

Zhao

Chen

Sun

et al. 2021

Adv Funct Materials

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Developing non‐platinum group metal (non‐PGM) electrocatalysts for the hydrogen oxidation reaction (HOR) represents the efforts towards the more economical use of hydrogen fuel cells and hydrogen energy, which has attracted tremendous attention recently. However, non‐PGM electrocatalysts for the HOR are still in their early development stages as compared with the significant advances in those for the oxygen reduction reaction and hydrogen evolution reaction. Herein, this paper summarizes the recent progresses and highlights the key challenges for the rational design of non‐PGM electrocatalysts, aiming to promote the development of non‐PGM HOR electrocatalysts. Fundamental understandings of the HOR mechanism are firstly reviewed, where theoretical interpretations on the low HOR kinetics in alkaline media, including the hydrogen binding energy theory, the bifunctional mechanism, and the water molecule reorganization, are particularly discussed. Subsequently, progresses of typical non‐PGM HOR electrocatalysts in acid and alkaline media are summarized separately. For the HOR under alkaline conditions, the superiorities and challenges of Ni‐based catalysts are discussed with a particular focus as they are the most promising non‐PGM electrocatalysts. Finally, this paper highlights the challenges and provide perspectives on the future development directions of non‐PGM HOR electrocatalysts.

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“…The counter electrode consisted of a Ti wire and the reference electrode was an Ag/AgCl, KCl (3 M) (denoted below Ag/AgCl). The working electrode was a GDL substrate with the deposited electrocatalyst layer fixed in the half-cell holder 46 (Figure S1). A nitrogen gas flow at the surface of the GDL was used to remove the produced H 2 .…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Nonprecious Bimetallic Iron–Molybdenum Sulfide Electrocatalysts for the Hydrogen Evolution Reaction in Proton Exchange Membrane Electrolyzers

et al. 2020

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In this study, we report the synthesis and characterization of non-precious bimetallic ironmolybdenum sulfide bioinspired electrocatalysts for the hydrogen evolution reaction (HER).Iron-molybdenum sulfide materials were obtained through three distinct scalable synthetic approaches using microwave irradiation or heat treatment in furnace under inert and reductive atmospheres. These electrocatalysts were combined with carbon nanotubes (CNTs) and their activity for the hydrogen evolution reaction (HER) was studied in acidic environment. The most efficient composite material of the series was obtained by microwave synthesis and displays a current density per geometric area of 10 mAcm -2 at an overpotential of 140 mV with unity faradaic efficiency for hydrogen evolution. This composite cathode catalyst was implemented into a proton exchange membrane (PEM) electrolyzer single cell with iridium black as anode catalyst and could be operated at 0.5 Acm -2 requiring less than 300 mV additional voltage compared to Pt, and with remarkable stability during accelerated stress testing.PEM-compatible oxygen evolution reaction (OER) catalysts based on Earth-abundant elements. [99][100] ASSOCIATED CONTENT Supporting Information. Supporting Information. Additional experimental details, PEM electrolyzer setup, SEM images, Raman spectra, XPS spectra, electrochemical results (PDF).

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Noncovalent Integration of a Bioinspired Ni Catalyst to Graphene Acid for Reversible Electrocatalytic Hydrogen Oxidation

Cited by 33 publications

References 78 publications

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges

Non‐Platinum Group Metal Electrocatalysts toward Efficient Hydrogen Oxidation Reaction

Nonprecious Bimetallic Iron–Molybdenum Sulfide Electrocatalysts for the Hydrogen Evolution Reaction in Proton Exchange Membrane Electrolyzers

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