Yaovi Holade

Yaovi Holade
Ecole Nationale Supérieure de Chimie de Montpellier · Institut Européen des Membranes

PhD
Interrogating electrochemistry-driven-research with unrivaled commitment, pushing boundaries, and broadening knowledge

About

79
Publications
17,554
Reads
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1,225
Citations
Introduction
My research might be resumed as “Combining Materials Science, Organic/Inorganic Chemistry and Electrochemistry/Electrocatalysis to design “Advanced Electrochemical Energy Converters” for Catalytic and Bionanotechnology applications
Additional affiliations
September 2016 - present
Ecole Nationale Supérieure de Chimie de Montpellier
Position
  • Professor (Assistant)
December 2015 - August 2016
University of Utah
Position
  • PostDoc Position
July 2015 - October 2015
Université de Poitiers
Position
  • Research Associate

Publications

Publications (79)
Article
Electrochemical converters (electrolyzers, fuel cells, and batteries) have gained prominence during the last decade for the unavoidable energy transition and the sustainable synthesis of platform chemicals. One of the key elements of these systems is the electrode material on which the electrochemical reactions occur, and therefore its design will...
Article
Full-text available
Foresee advanced and innovative strategies is a key approach and constitutes a cornerstone for accessing clean, affordable, and reliable energy to satisfy the world's increasing prosperity and economic growth. To this end, hydrogen energy technologies parade as promising sustainable solutions to the looming energy crisis at either the small or larg...
Article
Full-text available
Hydrogen peroxide (H2O2) is a key chemical for many industrial applications, yet it is primarily produced by the energy-intensive anthraquinone process. As part of the Power-to-X scenario of electrosynthesis, the controlled oxygen reduction reaction (ORR) can enable the decentralized and renewable production of H2O2. We have previously demonstrated...
Article
Full-text available
Glycerol is a cheap, non‐toxic, and renewable by‐product of the rapid expansion of biodiesel and soap producers around the world. Glycerol electroforming is a method of oxidizing glycerol into valuable chemicals of interest to the pharmaceutical, cosmetics, polymer, and food industries. One of the technologies that have been studied over the past d...
Article
Full-text available
Given the limited access to freshwater compared to seawater, a growing interest surrounds the direct seawater electrolysis to produce hydrogen. However, we currently lack efficient electrocatalysts to selectively perform the oxygen evolution reaction (OER) over the oxidation of the chloride ions that are the main components of seawater. In this con...
Article
Cellulosic biomass, which is basically a polymer of glucose, is the most abundant organic polymer on earth and there is significant interest in the development of advanced materials for its valorization through the waste-to-energy and water-to-chemical scenarios. Hence, a precise investigation of the monomer (glucose) electrooxidation in electroche...
Article
Full-text available
The practical implementation of air-breathing microbial fuel cell (MFC) is critically linked to the development of efficient materials as cathode and electrochemically active biofilm-based anode. In this contribution, we demonstrate the feasibility by decorating a 3D carbon felt electrode with Pt nanoarrays (CF@Pt) as a bifunctional electrode mater...
Article
Full-text available
The breakthrough in water electrolysis technology for the sustainable production of H2, considered as a future fuel, is currently hampered by the development of tough electrocatalytic materials. We report a new strategy of fabricating conducting polymer-derived nanostructured materials to accelerate the electrocatalytic hydrogen evolution reaction...
Chapter
The normal operation of an electrochemical converter involving electrocatalytic processes is the simultaneous combination of electrical conductivity (seen as electricity) and catalytic activity involving the same material so-called an “electrode.” Specifically, since the catalytic reactions need an electron transfer between the solid catalyst and t...
Chapter
The development of non-noble metal electrocatalysts for energy conversion and storage devices such as fuel cells and electrolyzers has gained renewed interest in the last decades. Specifically, transition metal oxides are one of the material categories that showed remarkable efficiency and stability for hydrogen electrode reactions. This chapter su...
Article
Electrochemical energy converters based on biomass-based organic molecules such as glucose have recently demonstrated great potential for the development of functional bioimplantable devices such as pacemakers, but such converters lack efficient metal-based anode nanocatalysts, which could combine the stability of parameters with high performance....
Article
The Cover Feature illustrates a lens material in contact with gaseous O2 on its outer surface and an aqueous liquid on its inner surface. The oxygen permeability of the lens is assessed in the liquid phase by measuring the electrical current from the electrochemical reduction of the dissolved O2 under constant bias potential. More information can b...
Article
The design of efficient electrochemical setups to precisely and timely quantify the oxygen permeability, which dictates how the lens let O2 to reach the eye, is important for the development lens‐based materials. We report herein a home‐made electro‐analytical platform made of a 3D‐printed diffusion electrochemical cell to assess this parameter. Th...
Article
Tartaric acid emerges as an ecofriendly organic for the biogenic preparation of micro- and nano-structured materials. For those synthesis mainly dictated by the coordination chemistry, questions remain open about the impact of the alkalinity on the nature of the resulting material as well as the properties. On the other hand, the design of advanced...
Article
The water splitting aims to produce H 2 for fuel cells and a number of industrial processes such as the ammonia synthesis and the metals refining. There is actually a major limitation about the development of cost‐effective and efficient electrocatalysts to lower the cell voltage that must be overcome to perform sequentially the overall reaction th...
Article
Three-dimensional (3D) gas diffusion electrodes (GDEs) as support for catalytic nanoparticles are important to the electrolysis and fuel cells fields to facilitate reactant transport and distribution, and reach higher current densities. Hence, the assembly of nanostructured catalytic particles directly onto GDEs during the synthesis could be a powe...
Cover Page
COMMUNICATION Yaovi Holade et al. Enhanced electrocatalytic activity and selectivity of glycerol oxidation triggered by nanoalloyed silver–gold nanocages directly grown on gas diff usion electrodes
Article
Full-text available
The development of reliable production routes for sustainable hydrogen (H2), which is an essential feedstock for industrial processes and energy carrier for fuel cells, is needed. It appears to be an unavoidable alternative to significantly reduce the dependence on conventional energy sources based on fossil fuels without increasing the atmospheric...
Article
Full-text available
Polyaniline (PANI) is a candidate for electrocatalysis, and can be combined with metal nanoparticles to fabricate high-performance electrodes for electrochemical energy conversion and storage. However, its intrinsic properties appear to be dependent on the synthesis conditions so that from the majority of the reports, it is quite difficult to estab...
Article
In this report, free-standing surfactant- and binder-free silver-gold nanoporous and nanoalloyed catalysts are successfully synthesized via a simple and effective approach directly onto a gas diffusion electrode (GDE@AgAu). The physicochemical and electrocatalytic analysis show that the obtained ever reported activity and selectivity towards the gl...
Article
Electrosynthesis, a historically powerful tool for the production of a number of industrial-scale inorganic or organic materials, has experienced a renaissance over the last ten years with research efforts seeking...
Article
Significantly reduction of the amount of precious metals in catalysts is a major challenge. We report the synthesis of high-performance carbon paper-boron nitride-palladium (CP-BN-Pd) electrocatalytic electrodes. The nanocatalysts consist of Pd nanoparticles of 5 nm supported on an ultrathin BN film prepared by atomic layer deposition (ALD), coveri...
Article
Full-text available
The design and fabrication of durable nanocatalysts to efficiently and selectively electro-oxidize organic molecules toward value-added product(s) is an important starting point for the future deployment of electrochemical “cogeneration” devices with the triple advantage of producing electricity, heat and fuels/chemicals. This interdisciplinary res...
Article
The ability to precisely engineer advanced catalysts for oxygen reduction reaction (ORR) and glycerol oxidation reaction (GOR) is crucial for the deployment of fuel cells (FCs) and electrolyzers technologies. In this work, we used an atomic layer deposition (ALD) process in order to prepare highly dispersed palladium nanoparticles (PdNPs) on electr...
Article
The ubiquitous electrochemistry is expected to play a major role for reliable energy, and for production of sustainable fuels and chemicals. For organics-based electrocatalysis in an alkaline medium, the fundamental understandings at solid-liquid interfaces involve relatively complex mechanisms and performance descriptors (from the electrolyte and...
Article
The development of enzymatic biofuel cells has been plagued by the high cost of enzyme purification and low efficiency of fuel oxidation. Here, we demonstrate a protein purification-free approach to assemble an alcohol dehydrogenase and aldehyde dehydrogenase enzyme cascade-based bioanode for use in a methanol biofuel cell. Each enzyme was fused to...
Chapter
From endeavors of the last quarter of the century gone by, newly released “jewelry” of the materials science, namely, self-assembled and self-supported giant nanoarchitectures have received tremendous interest from all areas of nanoscience and nanotechnology. Indeed, recently developed approaches for the fabrication of nanomaterials have opened new...
Article
Full-text available
The future of analytical devices, namely (bio)sensors, which are currently impacting our everyday life, relies on several metrics such as low cost, high sensitivity, good selectivity, rapid response, real-time monitoring, high-throughput, easy-to-make and easy-to-handle properties. Fortunately, they can be readily fulfilled by electrochemical metho...
Article
Full-text available
Enzymatic fuel cells (EFCs) utilize enzymatic catalysts to convert chemical energy to electrical energy, typically by performing a 2e − oxidation of saccharides. In the case of sugars, a single 2e − oxidation does not fully exploit this energy-dense fuel that is capable of producing 24e − from its complete oxidation to CO 2. Here, we propose an eff...
Article
Full-text available
Enzymatic fuel cells (EFCs) utilize enzymatic catalysts to convert chemical energy to electrical energy, typically by performing a 2e⁻ oxidation of saccharides. In the case of sugars, a single 2e⁻ oxidation does not fully exploit this energy-dense fuel that is capable of producing 24e⁻ from its complete oxidation to CO2. Here, we propose an efficie...
Article
Effects of various configurations of a chitosan film-templated biocathode on a direct electron transfer (DET)-type reaction were investigated. Self-standing electrospun carbon nanofibers (ECFs) obtained from the carbonization of polymer fibers were used as supporting material. The biocathode was built from a layered disposition of bilirubin oxidase...
Chapter
The interdisciplinary research involving materials science, bioelectrochemistry, and electrochemistry is still the hallmark of many technological and fundamental breakthroughs. Thus, foresee advanced electrode materials as innovative as effective while stepping up research in unexplored scientific endeavors is a key approach for developing groundbr...
Article
Designed as an alternative to lithium-ion batteries due to their low operating temperature, a wider fuel choice and their size that can be readily miniaturized, enzymatic biofuel cells have emerged as an option to extract electrical energy from chemical bonds for the autonomy of implanted micro-devices by providing clean, environmentally friendly,...
Article
Direct growth of hierarchical micro/nanostructured metal arrays on a 3D substrate is a powerful tool to enhance the catalytic efficiency of metal particles towards a wide range of substrates. In this contribution, we demonstrate a novel and versatile method for growing anisotropic microstructures directly onto a 3D carbon paper electrode, using Au,...
Chapter
Full-text available
This chapter presents an overview on size, structure, morphology, composition as well as the effect of the support on the electrocatalytic properties of gold nanoparticles (AuNPs). It was found that the electrocatalytic properties of unsupported AuNPs strongly depend on their size and shape. Consequently, the electrocatalytic properties of AuNPs ca...
Article
We report a novel “one-pot”, convenient and efficient method based on radiolysis to synthesize gold-based nanoparticles finely dispersed on reduced graphene oxide (rGO) nanosheets obtained from reductive transformation of graphene oxide (GO). Extensive characterizations of the metal/rGO nanocomposites were performed and revealed that the optimized...
Article
The efficient design of highly active and durable materials towards the ultimate goal of improving kinetics of the oxygen reduction reaction (ORR), which allow enhanced performance in solid alkaline membrane fuel cells (SAMFCs), remains elusive. Seminal studies have shown that by alloying a noble metal such as palladium to a transition metal, it is...
Article
We present the preparation of a redox DNA hydrogel for mediated bioelectrocatalysis of oxidoreductase enzymes for biosensor and biofuel cell applications. The noncovalent functionalization of DNA with redox molecules is achieved by intercalation of aromatic redox probes into the DNA double helix or electrostatic binding of redox active tetraalkylam...
Article
Palladium has exceptional affinity with hydrogen and the evolution of the surface of its nanomaterials prepared from chemical methods over time is still unclear. Here, the reducing agent effect on Pd nanomaterials and their long-term chemical stability was scrutinized by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The subseq...
Article
The selective electrochemical conversion of highly functionalized organic molecules into electricity, heat, and added-value chemicals for fine chemistry requires the development of highly selective, durable, and low-cost catalysts. Here, we propose an approach to make catalysts that can convert carbohydrates into chemicals selectively and produce e...
Article
By effectively bypassing the common problem of the loss of contact of platinum nanoparticles to carbon black support involved in the traditional methodology, supportless Pt, Au@Pt 3D-porous nanostructures (PtNBs and Au@PtNBs), and Aucore-Ptshell nanoparticles (Au50Pt50NPs) were synthesized. The radiolytic synthesis provides a high control on the si...
Article
We report a drastic enhancement of electrocatalytic activity toward glucose oxidation by using novel electrocatalysts on the basis of “bare” unprotected Au nanoparticles synthesized by methods of laser ablation in pure deionized water. The recorded current density of 2.65 A cm–2 mg–1 for glucose electrooxidation was higher than a relevant value for...
Article
Carbon nanofibers (CNFs) are a promising material as conducting support of catalysts in (bio)electrochemical applications. Self-standing CNFs result of the carbonization at 1200 °C of electrospun polymer fibers with mean fiber diameter of 330 ± 50 nm. Such felts present interesting properties like fibrous and porous morphology to relieve the mass-t...
Article
Experimental evidence for Pd-based structure modification of electrocatalysts with hydrogen during their chemical synthesis is still missing. Therefore, in situ X-ray diffraction (XRD) techniques were as used to investigate hydrogen insertion into the lattice of Pd nanomaterials during their preparation. It was shown that the use of NaBH4 as reduci...
Article
Full-text available
The oxygen reduction reaction (ORR) is the oldest studied and most challenging of the electrochemical reactions. Due to its sluggish kinetics, ORR became the major contemporary technological hurdle for electrochemists, as it hampers the commercialization of fuel cell (FC) technologies. Downsizing the metal particles to nanoscale introduces unexpect...
Article
Full-text available
The oxygen reduction reaction (ORR) is the oldest studied and most challenging of the electrochemical reactions. Due to its sluggish kinetics, ORR became the major contemporary technological hurdle for electrochemists, as it hampers the commercialization of fuel cell (FC) technologies. Downsizing the metal particles to nanoscale introduces unexpect...
Article
Full-text available
The oxygen reduction reaction (ORR) is the oldest studied and most challenging of the electrochemical reactions. Due to its sluggish kinetics, ORR became the major contemporary technological hurdle for electrochemists, as it hampers the commercialization of fuel cell (FC) technologies. Downsizing the metal particles to nanoscale introduces unexpect...
Article
Seminal papers have highlighted the promoting effect of gold when associated with other metals. There is still a lack of information about the origin of the exceptional electrochemical performances of gold-based nanostructures, known so far as one of the most active electrocatalysts for glucose-based energy conversion devices. In this report, we ex...
Article
An “abiotic” biofuel cell composed of catalytic electrodes modified with inorganic nanoparticles (NPs) deposited on carbon black (CB) was used to activate a wireless information transmission system. The cathode and anode were made of carbon paper modified with Pt-NPs/CB and buckypaper modified with Au80Pt20-NPs/CB, respectively. The cathode/anode p...
Article
We report a straightforward design for a hybrid glucose biofuel cell (h-GBFC) operating at pH 7.4 with 10 mM glucose at 37 °C. Homemade electrospun carbon nanofibers were used as electrode support. Clean and highly active gold-based nanomaterials (3–6 nm) were synthesized for glucose electrooxidation. Enhanced catalytic activity toward glucose oxid...
Article
An “abiotic” biofuel cell composed of catalytic electrodes modified with inorganic nanostructured species was used to activate a pacemaker. The catalytic nanoparticles of various compositions, AuxPty, deposited on carbon black (CB) were prepared and extensively characterized to select the species with selectivity for glucose oxidation and oxygen re...
Article
Full-text available
We report the increasingly improvement of the available specific surface area of the widespread used Vulcan XC 72R and Ketjenblack EC-600JD carbons by simple thermal pre-treatment. The treated Vulcan and Ketjenblack substrates show a specific surface area of 322 and 1631 m2 g-1 respectively instead of 262 and 1102 m2 g-1 for the as-received materia...