A5011758590- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Carbon dioxide utilization in catalysis
- Ionic liquids properties and applications
- Metalloenzymes and iron-sulfur proteins
- Advanced Photocatalysis Techniques
- Advanced Sensor and Energy Harvesting Materials
- Catalytic Processes in Materials Science
- Advanced battery technologies research
- Photosynthetic Processes and Mechanisms
- Quantum Dots Synthesis And Properties
- Surface Modification and Superhydrophobicity
- Machine Learning in Materials Science
- Textile materials and evaluations
- Engineering and Materials Science Studies
- Hybrid Renewable Energy Systems
- Recycling and Waste Management Techniques
- Crystallization and Solubility Studies
- Microbial Fuel Cells and Bioremediation
- Electrochemical Analysis and Applications
- Fuel Cells and Related Materials
- Materials Engineering and Processing
- Solidification and crystal growth phenomena
- Catalysis for Biomass Conversion
- Advanced Battery Technologies Research
Stanford University
2021-2022
Interface (United States)
2021-2022
Collège de France
2019-2021
Laboratoire de chimie des processus biologiques
2019-2021
Sorbonne Université
2019-2021
Centre National de la Recherche Scientifique
2019-2021
Université Paris Sciences et Lettres
2019
University of Cambridge
2014-2018
University of Warwick
2013
Plastic waste is recycled to hydrogen using sunlight and a CdS photocatalyst.
CO2 and formate are rapidly, selectively, efficiently interconverted by tungsten-containing dehydrogenases that surpass current synthetic catalysts. However, their mechanism of catalysis is unknown, no tractable system available for study. Here, we describe the catalytic properties molybdenum-containing dehydrogenase H from model organism Escherichia coli (EcFDH-H). We use protein film voltammetry to demonstrate EcFDH-H a highly active, reversible electrocatalyst. In each voltammogram single...
Abstract Formic acid is considered a promising energy carrier and hydrogen storage material for carbon‐neutral economy. We present an inexpensive system the selective room‐temperature photocatalytic conversion of formic into either or carbon monoxide. Under visible‐light irradiation ( λ >420 nm, 1 sun), suspensions ligand‐capped cadmium sulfide nanocrystals in acid/sodium formate release up to 116±14 mmol H 2 g cat −1 h with >99 % selectivity when combined cobalt co‐catalyst; quantum...
Electrochemical molecular catalyst screening (EMoCS) has been developed. This technique allows fast analysis and identification of homogeneous catalytic species through tandem assembly electrochemistry. EMoCS used to study proton reduction catalysts made from earth abundant materials improve their viability for water splitting systems. The efficacy is proven investigation cobaloxime activity with respect the axial ligand in aqueous solution. Over 20 ligands were analysed, allowing rapid most...
Abstract A freestanding H 2 ‐evolution electrode consisting of a copolymer‐embedded cobaloxime integrated into multiwall carbon nanotube matrix by π–π interactions is reported. This straightforward to assemble and displays high activity towards hydrogen evolution in near‐neutral pH solution under inert aerobic conditions, with cobalt‐based turnover number (TON Co ) up 420. An analogous monomeric showed less TON only 80. These results suggest that, addition the surface area porous network...
CO2 emissions can be transformed into high-added-value commodities through electrocatalysis; however, efficient low-cost electrocatalysts are needed for global scale-up. Inspired by other emerging technologies, the authors report development of a gas diffusion electrode containing highly dispersed Ag sites in Zn matrix. This catalyst shows unprecedented mass activity CO production: -614 mA cm-2 at 0.17 mg Ag. Subsequent electrolyte engineering demonstrates that halide anions further improve...
This perspective summarises strategies for avoiding adverse effects of O<sub>2</sub> on H<sub>2</sub>-evolving enzymatic systems, molecular synthetic catalysts and catalytic surfaces.
Abstract Alloying strategies are commonly used to design electrocatalysts that take on properties of their constituent elements. Herein, such a strategy is develop Zn–Cu alloyed electrodes with unique hierarchical porosity and tunable selectivity for CO 2 versus H + reduction. By varying the Zn/Cu ratio, tailored syngas mixtures obtained without production other gaseous products, which attributed preferential CO‐ ‐forming pathways alloys. The ratios also significantly less sensitive applied...
The electrocatalytic proton reduction activity of a Ni bis(diphosphine) and cobaloxime catalyst has been studied in water the presence gaseous inhibitors O<sub>2</sub> CO.
Abstract It is generally believed that CO 2 electroreduction to multi‐carbon products such as ethanol or ethylene may be catalyzed with significant yield only on metallic copper surfaces, implying large ensembles of atoms. Here, we report an inexpensive Cu‐N‐C material prepared via a simple pyrolytic route exclusively feature single atoms CuN 4 coordination environment, atomically dispersed in nitrogen‐doped conductive carbon matrix. This achieves aqueous at Faradaic 55 % under optimized...
Boron doped diamond (BDD) disk ultramicroelectrodes have been used to sense single nanoparticle (NP) electrocatalytic collision events. BDD serves as an excellent support electrode due its inactivity and low background currents thus can be detect the electroactivity of a wide range colliding NPs, with high sensitivity. In particular, NP collisions for hydrazine oxidation at Au Pt NPs were shown markedly different.
Abstract A freestanding H 2 ‐evolution electrode consisting of a copolymer‐embedded cobaloxime integrated into multiwall carbon nanotube matrix by π–π interactions is reported. This straightforward to assemble and displays high activity towards hydrogen evolution in near‐neutral pH solution under inert aerobic conditions, with cobalt‐based turnover number (TON Co ) up 420. An analogous monomeric showed less TON only 80. These results suggest that, addition the surface area porous network...
Abstract Carbonylation reactions that generate high‐value chemical feedstocks are integral to the formation of many industrially significant compounds. However, these processes require use CO, which is invariably derived from fossil‐fuel‐reforming reactions. CO may also be generated through electroreduction 2 , but coupling two yet considered. Merging electrocatalytic reduction with thermocatalytic would expand range chemicals produced . This work describes development a system high‐pressure...
Abstract Photocatalytic H 2 production through water splitting represents an attractive route to generate a renewable fuel. These systems are typically limited anaerobic conditions due the inhibiting effects of O . Here, we report that sacrificial evolution with CdS quantum dots does not necessarily suffer from inhibition and can even be stabilised under aerobic conditions. The introduction prevents key inactivation pathway (over‐accumulation metallic Cd particle agglomeration) thereby...
Abstract Formic acid is considered a promising energy carrier and hydrogen storage material for carbon‐neutral economy. We present an inexpensive system the selective room‐temperature photocatalytic conversion of formic into either or carbon monoxide. Under visible‐light irradiation ( λ >420 nm, 1 sun), suspensions ligand‐capped cadmium sulfide nanocrystals in acid/sodium formate release up to 116±14 mmol H 2 g cat −1 h with >99 % selectivity when combined cobalt co‐catalyst; quantum...
Engineering the interfacial distribution of electrolytic ions can aid in modulating electrocatalyst performance and efficiency. Using a hybrid quantum-classical modeling approach, we describe how predictive tuning solution microenvironment on copper enhance efficiency CO2 reduction (CO2R) to C2 products. We elucidate competing electrolyte constituents mixed solutions stimulate restructuring electrochemical double layer (EDL) stabilize OCCO* dimer (* denotes surface adsorbed), with...
Abstract The formation of iron phosphide nanoparticles (Fe x P NPs) is a well‐studied process. It usually uses air‐sensitive phosphorus precursors such as n ‐trioctylphosphine or white phosphorus. In this study, we report the synthesis and characterization remarkably stable tetrakis(acyl)cyclotetraphosphane, 4 (MesCO) . We demonstrate that compound can be used stoichiometric source P(0) species in order to synthesize FeP Fe 2 at only 250 °C. This tunable process provides route monodisperse...