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Creating Conjugated C−C Bonds between Commercial Carbon Electrode and Molecular Catalyst for Oxygen Reduction to Hydrogen Peroxide

Biemolt, J. (author), Meeus, Eva J. (author), de Zwart, Felix J. (author), de Graaf, Jeen (author), Laan, Petrus C.M. (author), de Bruin, Bas (author), Burdyny, T.E. (author), Rothenberg, Gadi (author), Yan, Ning (author)

Immobilizing molecular catalysts on electrodes is vital for electrochemical applications. However, creating robust electrode-catalyst interactions while maintaining good catalytic performance and rapid electron transfer is challenging. Here, without introducing any foreign elements, we show a bottom-up synthetic approach of constructing the...

journal article 2023

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Electrochemical oceanic carbon capture: using bipolar membrane electrodialysis

sharifian, rezvan (author)

To mitigate climate change, carbon capture is necessary. In addition to the energy transition towards renewable sources and green house gasses emission reduction, CO2 capture from flue gas and its sinks, including air and the ocean, must be promoted. By 2030, in less than 8 years, the global carbon capture capacity must increase 100 × (from the...

doctoral thesis 2022

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Narrow Pressure Stability Window of Gas Diffusion Electrodes Limits the Scale-Up of CO₂Electrolyzers

Baumgartner, L.M. (author), Koopman, C.I. (author), Forner-Cuenca, Antoni (author), Vermaas, D.A. (author)

Electrochemical CO2 reduction is a promising process to store intermittent renewable energy in the form of chemical bonds and to meet the demand for hydrocarbon chemicals without relying on fossil fuels. Researchers in the field have used gas diffusion electrodes (GDEs) to supply CO2 to the catalyst layer from the gas phase. This approach...

journal article 2022

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Zero-Threshold Optical Gain in Electrochemically Doped Nanoplatelets and the Physics behind It

Geuchies, J.J. (author), Dijkhuizen, Robbert (author), Koel, Marijn (author), Grimaldi, G. (author), du Fossé, I. (author), Evers, W.H. (author), Hens, Zeger (author), Houtepen, A.J. (author)

Colloidal nanoplatelets (NPLs) are promising materials for lasing applications. The properties are usually discussed in the framework of 2D materials, where strong excitonic effects dominate the optical properties near the band edge. At the same time, NPLs have finite lateral dimensions such that NPLs are not true extended 2D structures. Here...

journal article 2022

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Long-Range Charge Transport via Redox Ligands in Quantum Dot Assemblies

Vogel, Y.B. (author), Stam, M. (author), Mulder, J.T. (author), Houtepen, A.J. (author)

We present a strategy to actively engineer long-range charge transport in colloidal quantum dot assemblies by using ligand functionalities that introduce electronic states and provide a path for carrier transfer. This is a shift away from the use of inactive spacers to modulate charge transport through the lowering of the tunneling barrier...

journal article 2022

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Layer-by-Layer Electrode Fabrication for Improved Performance of Porous Polyimide-Based Supercapacitors

Fernando, Niranjala (author), Veldhuizen, H.V. (author), Nagai, Atsushi (author), van der Zwaag, S. (author), Abdelkader, Amor (author)

Nanoporous polymers are becoming increasingly interesting materials for electrochemical applications, as their large surface areas with redox-active sites allow efficient adsorption and diffusion of ions. However, their limited electrical conductivity remains a major obstacle in practical applications. The conventional approach that alleviates...

journal article 2022

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Electrochemical CO₂Reduction over Metal-/Nitrogen-Doped Graphene Single-Atom Catalysts Modeled Using the Grand-Canonical Density Functional Theory

Brimley, Paige (author), Almajed, Hussain (author), Alsunni, Yousef (author), Alherz, Abdulaziz W. (author), Bare, Zachary J.L. (author), Smith, W.A. (author), Musgrave, Charles B. (author)

Renewably driven, electrochemical conversion of carbon dioxide into value-added products is expected to be a critical tool in global decarbonization. However, theoretical studies based on the computational hydrogen electrode largely ignore the nonlinear effects of the applied potential on the calculated results, leading to inaccurate...

journal article 2022

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When Flooding Is Not Catastrophic Woven Gas Diffusion Electrodes Enable Stable CO₂Electrolysis

Baumgartner, L.M. (author), Koopman, C.I. (author), Forner-Cuenca, Antoni (author), Vermaas, D.A. (author)

Electrochemical CO2 reduction has the potential to use excess renewable electricity to produce hydrocarbon chemicals and fuels. Gas diffusion electrodes (GDEs) allow overcoming the limitations of CO2 mass transfer but are sensitive to flooding from (hydrostatic) pressure differences, which inhibits upscaling. We investigate the effect of the...

journal article 2022

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Morphological and Surface Potential Characterization of Protein Nanobiofilm Formation on Magnesium Alloy Oxide: Their Role in Biodegradation

Rahimi, E. (author), Imani, Amin (author), Lekka, Maria (author), Andreatta, Francesco (author), Gonzalez Garcia, Y. (author), Mol, J.M.C. (author), Asselin, Edouard (author), Fedrizzi, Lorenzo (author)

The formation of a protein nanobiofilm on the surface of degradable biomaterials such as magnesium (Mg) and its alloys influences metal ion release, cell adhesion/spreading, and biocompatibility. During the early stage of human body implantation, competition and interaction between inorganic species and protein molecules result in a complex...

journal article 2022

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Chloride-induced corrosion of steel reinforcement in alkali-activated slag/ metakaolin blended concretes

GevaudanE, Juan Pablo (author), Bernal, Susan A. (author)

The aim of this study is to understand the corrosion mechanism of steel embedded in alkali-activated slag/metakaolin blended concretes via electrochemical testing after 407 days of exposure to a 3.5 wt.% NaCl solution, with an emphasis on characterising the material prior to the onset of corrosion. In order to accurately depict the material’s...

conference paper 2021

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Electrified Conversion of Contaminated Water to Value: Selective Conversion of Aqueous Nitrate to Ammonia in a Polymer Electrolyte Membrane Cell

Bunea, S. (author), Clemens, Kevin (author), Urakawa, A. (author)

The application of a polymer electrolyte membrane (PEM) electrolytic cell for continuous conversion of nitrate, one of the contaminants in water, to ammonia at the cathode was explored in the present work. Among carbon-supported metal (Cu, Ru, Rh and Pd) electrocatalysts, the Ru-based catalyst showed the best performance. By suppressing the...

journal article 2021

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Key Intermediate Species Reveal the Copper(II)-Exchange Pathway in Biorelevant ATCUN/NTS Complexes

Kotuniak, Radosław (author), Strampraad, M.J.F. (author), Bossak-Ahmad, Karolina (author), Wawrzyniak, Urszula E. (author), Ufnalska, Iwona (author), Hagedoorn, P.L. (author), Bal, Wojciech (author)

The amino-terminal copper and nickel/N-terminal site (ATCUN/NTS) present in proteins and bioactive peptides exhibits high affinity towards Cu^II ions and have been implicated in human copper physiology. Little is known, however, about the rate and exact mechanism of formation of such complexes. We used the stopped-flow and...

journal article 2020

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Quantitative Electrochemical Control over Optical Gain in Quantum-Dot Solids

Geuchies, J.J. (author), Brynjarsson, Baldur (author), Grimaldi, G. (author), Gudjónsdóttir, S. (author), van der Stam, W. (author), Evers, W.H. (author), Houtepen, A.J. (author)

Solution-processed quantum dot (QD) lasers are one of the holy grails of nanoscience. They are not yet commercialized because the lasing threshold is too high: one needs >1 exciton per QD, which is difficult to achieve because of fast nonradiative Auger recombination. The threshold can, however, be reduced by electronic doping of the QDs,...

journal article 2020

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The Effect of Magnetic Field on Catalytic Properties in Core-Shell Type Particles

Westsson, E.E. (author), Picken, S.J. (author), Koper, G.J.M. (author)

Magnetic field effects can provide a handle on steering chemical reactions and manipulating yields. The presence of a magnetic field can influence the energy levels of the active species by interacting with their spin states. Here we demonstrate the effect of a magnetic field on the electrocatalytic processes taking place on platinum-based...

journal article 2020

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Reduced Ion Crossover in Bipolar Membrane Electrolysis via Increased Current Density, Molecular Size, and Valence

Blommaert, M.A. (author), Verdonk, J.A.H. (author), Blommaert, Hester C.B. (author), Smith, W.A. (author), Vermaas, D.A. (author)

A bipolar membrane (BPM) can be used to accelerate water dissociation to maintain a pH gradient in electrochemical cells, providing freedom to independently optimize the environments and catalysts used for paired reduction and oxidation reactions. The two physical layers in a BPM, respectively, selective for the exchange of cations and anions...

journal article 2020

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H₂O₂ Production at Low Overpotentials for Electroenzymatic Halogenation Reactions

Bormann, Sebastian (author), van Schie, M.M.C.H. (author), Pedroso de Almeida, T. (author), Zhang, W. (author), Stöckl, Markus (author), Ulber, Roland (author), Hollmann, F. (author), Holtmann, Dirk (author)

Various enzymes utilize hydrogen peroxide as an oxidant. Such “peroxizymes” are potentially very attractive catalysts for a broad range of oxidation reactions. Most peroxizymes, however, are inactivated by an excess of H₂O₂. The electrochemical reduction of oxygen can be used as an in situ generation method for hydrogen...

journal article 2019

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On the Stability of Permanent Electrochemical Doping of Quantum Dot, Fullerene, and Conductive Polymer Films in Frozen Electrolytes for Use in Semiconductor Devices

Gudjónsdóttir, S. (author), van der Stam, W. (author), Koopman, Christel (author), Kwakkenbos, Bob (author), Evers, W.H. (author), Houtepen, A.J. (author)

Semiconductor films that allow facile ion transport can be electronically doped via electrochemistry, where the amount of injected charge can be controlled by the potential applied. To apply electrochemical doping to the design of semiconductor devices, the injected charge has to be stabilized to avoid unintentional relaxation back to the...

journal article 2019

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Engineering Metal–Organic Frameworks for the Electrochemical Reduction of CO₂: A Minireview

Wang, R. (author), Kapteijn, F. (author), Gascon, Jorge (author)

The electrochemical reduction of CO₂ holds great promise for lowering the concentration of CO₂ in the Earth′s atmosphere. However, several challenges have hindered the commercialization of this technology, including energy efficiency, the solubility of CO₂ in the aqueous phase, and electrode stability. In this...

review 2019

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Making Better Batteries: Following Electrochemistry at the Nano Scale with Electron Microscopy

Basak, S. (author)

With the focus in automobile industry to switch from petroleum-based vehicles to all electric vehicles, the increasing demand on harvesting energy from renewable sources for a safer and greener future and the ever-increasing demand of the portable electronics systems, the need for better batteries is eminent. The ultimate aim of battery research...

doctoral thesis 2017

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Combined Corrosion and Wear of Aluminium Alloy 7075-T6

Liu, Y. (author), Mol, J.M.C. (author), Janssen, G.C.A.M. (author)

The aluminium alloy 7075-T6 is widely used in engineering. In some applications, like slurry transport, corrosion and abrasion occur simultaneously, resulting in early material failure. In the present work, we investigated the combined effect of corrosion and wear on the aluminium alloy 7075-T6. We performed two series of wear experiments to...

journal article 2016