Drew Higgins
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View article: Efficient amino-acid-based reactive capture of CO2 via nickel molecular catalyst
Efficient amino-acid-based reactive capture of CO2 via nickel molecular catalyst Open
Reactive capture integrates CO2 capture and electrochemical conversion into CO - a key building block in the synthesis of industrial chemicals and fuels - avoiding costly regeneration steps and improving efficiency. Amino acid salt solutio…
View article: Understanding the Activity Trade-Off between Tetrapyrrolic Fe-NCs and Co-NCs in the Alkaline Oxygen Reduction Reaction
Understanding the Activity Trade-Off between Tetrapyrrolic Fe-NCs and Co-NCs in the Alkaline Oxygen Reduction Reaction Open
A water-free ionothermal synthesis of porous magnesium-imprinted nitrogen-doped carbon (Mg–NC) materials is introduced to prepare a platform material to investigate electrocatalytic structure-performance relations. Atomically dispersed Co-…
View article: Electrochemical Conversion of (Bi)carbonate-based CO2 Capture Solutions to Ethylene on Porous Copper-based Nanowire Electrodes
Electrochemical Conversion of (Bi)carbonate-based CO2 Capture Solutions to Ethylene on Porous Copper-based Nanowire Electrodes Open
Rising atmospheric CO2 concentrations threaten global climate stability and ecosystem health. One promising approach to tackling this challenge is the development of novel technologies capable of capturing CO2 and converting it into valuab…
View article: An organic trimer molecule with carbon black as an active material for supercapacitor applications
An organic trimer molecule with carbon black as an active material for supercapacitor applications Open
Quinone-based organic molecules show promise as electrode active materials for supercapacitor applications due to their reversible redox activity, high theoretical capacitances, low cost, nontoxicity, and renewability. The use of quinone c…
View article: A tert-butyl functionalized quinone as active material for rechargeable aqueous zinc-ion batteries exhibiting high round-trip efficiency
A tert-butyl functionalized quinone as active material for rechargeable aqueous zinc-ion batteries exhibiting high round-trip efficiency Open
The implementation of renewable electricity into the grid requires efficient grid-energy storage systems for balancing supply and demand. Rechargeable zinc-ion batteries (ZIBs) are a low-cost, safe option for grid energy storage; however, …
View article: Influence of Nitrogen Doping and Pre‐Carbonization on the Performance of Lignin‐Derived Activated Carbon for Supercapacitor Applications
Influence of Nitrogen Doping and Pre‐Carbonization on the Performance of Lignin‐Derived Activated Carbon for Supercapacitor Applications Open
Nanostructured carbons are widely used as active materials for supercapacitor applications owing to their high specific surface area and electrical conductivity. Biomass waste‐derived materials can be sustainably produced. In this work, hi…
View article: In Situ Transmission Electron Microscopy of Electrocatalyst Materials: Proposed Workflows, Technical Advances, Challenges, and Lessons Learned
In Situ Transmission Electron Microscopy of Electrocatalyst Materials: Proposed Workflows, Technical Advances, Challenges, and Lessons Learned Open
In situ electrochemical liquid phase transmission electron microscopy (LP‐TEM) measurements utilize micro‐chip three‐electrode cells with electron transparent silicon nitride windows that confine the liquid electrolyte. By imaging electroc…
View article: 3D Bimetallic Platinum‐Nickel Electrodes for Electro‐Oxidation of Glycerol at Ambient Conditions
3D Bimetallic Platinum‐Nickel Electrodes for Electro‐Oxidation of Glycerol at Ambient Conditions Open
Partial electro‐oxidation using renewable electricity offers a sustainable route for valorizing glycerol, a major by‐product of biofuel production. This study introduces a bimetallic electrode with nanostructured platinum dendrites on nick…
View article: Formation of Core‐Shell Ir@TiO<sub>2</sub> Nanoparticles through Hydrogen Treatment as Acidic Oxygen Evolution Reaction Catalysts
Formation of Core‐Shell Ir@TiO<sub>2</sub> Nanoparticles through Hydrogen Treatment as Acidic Oxygen Evolution Reaction Catalysts Open
The transition to a sustainable energy economy requires the availability of renewably produced hydrogen through proton exchange membrane water electrolysis. The techno‐economic viability of this technology requires addressing materials cha…
View article: Roadmap for the development of transition metal oxide cathodes for rechargeable zinc-ion batteries
Roadmap for the development of transition metal oxide cathodes for rechargeable zinc-ion batteries Open
Rechargeable zinc-ion batteries (RZIBs) are a promising multivalent battery technology for grid-scale energy storage applications, thanks to their abundant materials, lower environmental impact, and higher safety due to the use of aqueous …
View article: Redox-Active Phenanthrenequinone Molecules and Nitrogen-Doped Reduced Graphene Oxide as Active Material Composites for Supercapacitor Applications
Redox-Active Phenanthrenequinone Molecules and Nitrogen-Doped Reduced Graphene Oxide as Active Material Composites for Supercapacitor Applications Open
Carbon-based supercapacitor electrodes are generally restricted in energy density, as they rely exclusively on electric double-layer capacitance (EDLC). The introduction of redox-active organic molecules to obtain pseudocapacitance is a pr…
View article: Unveiling BiVO<sub>4</sub> photoelectrocatalytic potential for CO<sub>2</sub> reduction at ambient temperature
Unveiling BiVO<sub>4</sub> photoelectrocatalytic potential for CO<sub>2</sub> reduction at ambient temperature Open
An optimistic system for CO 2 reduction! This study employs BiVO 4 as a cathode catalyst by a photoelectrochemical method. Different tests were performed by altering the excitation source and photo- and electrochemical methods were compare…
View article: In-situ Studies of Copper-based CO2 Reduction Electrocatalysts by Scanning Transmission Soft X-ray Microscopy
In-situ Studies of Copper-based CO2 Reduction Electrocatalysts by Scanning Transmission Soft X-ray Microscopy Open
A micro-fluidic enabled electrochemical device has been developed to investigate electrochemically active materials under reaction conditions using in-situ scanning transmission soft X-ray microscopy (STXM). In-situ STXM measurements at th…
View article: In-Situ Liquid Phase Transmission Electron Microscopy and Electron Diffraction Provides Mechanistic Insight into Electrochemical CO2 Reduction on Palladium/Palladium Hydride Catalysts
In-Situ Liquid Phase Transmission Electron Microscopy and Electron Diffraction Provides Mechanistic Insight into Electrochemical CO2 Reduction on Palladium/Palladium Hydride Catalysts Open
Electrochemical conversion of CO2 (CO2R) offers a sustainable route for producing fuels and chemicals. Pd-based catalysts are effective for selective conversion of CO2 into formate at low overpotentials and CO/H2 at high overpotentials. Fu…
View article: Multi-Descriptor Design of Ruthenium Catalysts for Durable Acidic Water Oxidation
Multi-Descriptor Design of Ruthenium Catalysts for Durable Acidic Water Oxidation Open
Further improvements in the performance and cost-effectiveness of water electrolyzers are urgently needed to accelerate decarbonization of hydrogen production. Iridium-free oxygen evolution reaction (OER) electrocatalysts are needed that a…
View article: Computational screening of cathode materials for Zn-ion rechargeable batteries
Computational screening of cathode materials for Zn-ion rechargeable batteries Open
We propose a comprehensive set of indicators (including methods to obtain and analyse them) for computational screening of candidate cathode materials for rechargeable Zn-ion aqueous batteries relying on Zn$^{2+}$ intercalation processes. …
View article: Chemical Structure and Distribution in Nickel–Nitrogen–Carbon Catalysts for CO<sub>2</sub> Electroreduction Identified by Scanning Transmission X-ray Microscopy
Chemical Structure and Distribution in Nickel–Nitrogen–Carbon Catalysts for CO<sub>2</sub> Electroreduction Identified by Scanning Transmission X-ray Microscopy Open
Atomically dispersed metal-nitrogen-carbon (M-N-C) materials are a class of electrocatalysts for fuel cell and electrochemical CO2 reduction (CO2R) applications. However, it is challenging to characterize the identity and concentration of …
View article: Electrochemical Stability of ZnMn<sub>2</sub>O<sub>4</sub>: Understanding Zn-Ion Rechargeable Battery Capacity and Degradation
Electrochemical Stability of ZnMn<sub>2</sub>O<sub>4</sub>: Understanding Zn-Ion Rechargeable Battery Capacity and Degradation Open
We present a refined Mn-Zn-H$_2$O Pourbaix diagram with the emphasis on\nparameters relevant for the Zn/MnO$_2$ rechargeable cells. It maps out\nboundaries of electrochemical stability for MnO$_2$, ZnMn$_2$O$_4$,\nZnMn$_3$O$_7$, and MnOOH.…
View article: Electrochemical stability of ZnMn2O4: Understanding Zn-ion rechargeable battery capacity and degradation
Electrochemical stability of ZnMn2O4: Understanding Zn-ion rechargeable battery capacity and degradation Open
We present a refined Mn-Zn-H$_2$O Pourbaix diagram with the emphasis on parameters relevant for the Zn/MnO$_2$ rechargeable cells. It maps out boundaries of electrochemical stability for MnO$_2$, ZnMn$_2$O$_4$, ZnMn$_3$O$_7$, and MnOOH. Th…
View article: <i>In-situ</i> and <i>Operando</i> Studies with Soft X-Ray Transmission Spectromicroscopy
<i>In-situ</i> and <i>Operando</i> Studies with Soft X-Ray Transmission Spectromicroscopy Open
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View article: In Situ Formation of Nano Ni–Co Oxyhydroxide Enables Water Oxidation Electrocatalysts Durable at High Current Densities
In Situ Formation of Nano Ni–Co Oxyhydroxide Enables Water Oxidation Electrocatalysts Durable at High Current Densities Open
The oxygen evolution reaction (OER) limits the energy efficiency of electrocatalytic systems due to the high overpotential symptomatic of poor reaction kinetics; this problem worsens over time if the performance of the OER electrocatalyst …
View article: Dynamics and Hysteresis of Hydrogen Intercalation and Deintercalation in Palladium Electrodes: A Multimodal <i>In Situ</i> X-ray Diffraction, Coulometry, and Computational Study
Dynamics and Hysteresis of Hydrogen Intercalation and Deintercalation in Palladium Electrodes: A Multimodal <i>In Situ</i> X-ray Diffraction, Coulometry, and Computational Study Open
Understanding hydrogen intercalation and deintercalation in palladium is the key to utilizing palladium-based materials for hydrogen storage, hydrogen separations, and electrochemical hydrogen evolution and CO2 reduction catalysis. Here, w…
View article: Understanding Degradation Mechanisms in SrIrO<sub>3</sub> Oxygen Evolution Electrocatalysts: Chemical and Structural Microscopy at the Nanoscale
Understanding Degradation Mechanisms in SrIrO<sub>3</sub> Oxygen Evolution Electrocatalysts: Chemical and Structural Microscopy at the Nanoscale Open
Designing acid‐stable oxygen evolution reaction electrocatalysts is key to developing sustainable energy technologies such as polymer electrolyte membrane electrolyzers but has proven challenging due to the high applied anodic potentials a…
View article: Direct Integration of Strained‐Pt Catalysts into Proton‐Exchange‐Membrane Fuel Cells with Atomic Layer Deposition
Direct Integration of Strained‐Pt Catalysts into Proton‐Exchange‐Membrane Fuel Cells with Atomic Layer Deposition Open
The design and fabrication of lattice‐strained platinum catalysts achieved by removing a soluble core from a platinum shell synthesized via atomic layer deposition, is reported. The remarkable catalytic performance for the oxygen reduction…