A5103068645- Electrocatalysts for Energy Conversion
- CO2 Reduction Techniques and Catalysts
- Exercise and Physiological Responses
- Electrochemical Analysis and Applications
- Ionic liquids properties and applications
- Adipose Tissue and Metabolism
- Advanced battery technologies research
- Electron and X-Ray Spectroscopy Techniques
- Muscle Physiology and Disorders
- Advanced Thermoelectric Materials and Devices
- Muscle metabolism and nutrition
- Ammonia Synthesis and Nitrogen Reduction
- Fuel Cells and Related Materials
- Adipokines, Inflammation, and Metabolic Diseases
- Advanced Photocatalysis Techniques
- Cardiovascular and exercise physiology
- Anodic Oxide Films and Nanostructures
- Machine Learning in Materials Science
- Advanced Electron Microscopy Techniques and Applications
- Acupuncture Treatment Research Studies
- Copper-based nanomaterials and applications
- Genetics and Physical Performance
- Carbon dioxide utilization in catalysis
- MXene and MAX Phase Materials
- Catalysis and Oxidation Reactions
Fritz Haber Institute of the Max Planck Society
2020-2025
University of Illinois Urbana-Champaign
2021-2022
Ulsan National Institute of Science and Technology
2020
Institute for Basic Science
2020
Albany State University
2016-2019
The University of Texas at Austin
2017
Texas A&M University – San Antonio
2015
California State University, Stanislaus
2015
Midwestern State University
2015
To rationally design effective and stable catalysts for energy conversion applications, we need to understand how they transform under reaction conditions reveal their underlying structure-property relationships. This is especially important used in the electroreduction of carbon dioxide where product selectivity sensitive catalyst structure. Here, present real-time electrochemical liquid cell transmission electron microscopy studies showing restructuring copper(I) oxide cubes during...
In this study, we have taken advantage of a pulsed CO2 electroreduction reaction (CO2RR) approach to tune the product distribution at industrially relevant current densities in gas-fed flow cell. We compared CO2RR selectivity Cu catalysts subjected either potentiostatic conditions (fixed applied potential −0.7 VRHE) or electrolysis (1 s pulses oxidative potentials ranging from Ean = 0.6 1.5 VRHE, followed by 1 and identified main parameters responsible for enhanced observed latter case....
The electrochemical reduction of nitrate (NO3–) and nitrite (NO2–) enables sustainable, carbon-neutral, decentralized routes to produce ammonia (NH3). Copper-based materials are promising electrocatalysts for NOx– conversion NH3. However, the underlying reaction mechanisms role different Cu species during catalytic process still poorly understood. Herein, by combining quasi in situ X-ray photoelectron spectroscopy (XPS) operando absorption (XAS), we unveiled that is mostly metallic form...
The activity of Ni (hydr)oxides for the electrochemical evolution oxygen (OER), a key component overall water splitting reaction, is known to be greatly enhanced by incorporation Fe. However, complete understanding role cationic Fe species and nature catalyst surface under reaction conditions remains unclear. Here, using combination cell conventional transmission electron microscopy, we show how NiO electrocatalysts, with initially well-defined facets, restructures applied potential forms an...
Abstract Electrocatalysts alter their structure and composition during reaction, which can in turn create new active/selective phases. Identifying these changes is crucial for determining how morphology controls catalytic properties but the mechanisms by operating conditions shape catalyst’s working state are not yet fully understood. In this study, we show using correlated operando microscopy spectroscopy that as well-defined Cu 2 O cubes evolve under electrochemical nitrate reduction...
Abstract Copper and nitrogen co-doped carbon catalysts exhibit a remarkable behavior during the electrocatalytic CO 2 reduction (CO RR), namely, formation of metal nanoparticles from Cu single atoms, their subsequent reversible redispersion. Here we show that switchable nature these species holds key for on-demand control over distribution RR products, lack which has thus far hindered wide-spread practical adoption RR. By intermitting pulses working cathodic potential with anodic potential,...
Catalyst restructuring during electrochemical reactions is a critical but poorly understood process that determines the underlying structure-property relationships catalysis. In electrocatalytic reduction of CO
Bismuth is a catalyst material that selectively produces formate during the electrochemical reduction of CO
The key role of morphological defects (e.g., irregular steps and dislocations) on the selectivity model Cu catalysts for electrocatalytic reduction CO2 (CO2RR) is illustrated here. Cu(111) single-crystal surfaces prepared under ultrahigh vacuum (UHV) conditions presenting similar chemical local microscopic surface features were found to display different product during CO2RR. In particular, changes in from hydrogen-dominant hydrocarbon-dominant distributions observed based number CO2RR...
Reducing the iridium demand in Proton Exchange Membrane Water Electrolyzers (PEM WE) is a critical priority for green hydrogen industry. This study reports discovery of TiO2-supported Ir@IrO(OH)x core–shell nanoparticle catalyst with reduced Ir content, which exhibits superior catalytic performance electrochemical oxygen evolution reaction (OER) compared to commercial reference. The configuration significantly enhances OER mass activity from 8 approximately 150 A gIr–1 at 1.53 VRHE while...
The renewable energy-powered conversion of industrially generated CO2 into useful chemicals and fuels is considered a promising technology for the sustainable development our modern society. electrochemical reduction (CO2RR) one possible processes that can be employed to close artificial carbon cycle, mimicking nature’s photosynthesis. Nevertheless, enable green catalytic processes, selectivity desired products must achieved. In case CO2RR, strongly dependent on electrocatalyst structure....
Understanding the chemical states of individual surface atoms and their arrangements is essential for addressing several current issues such as catalysis, energy stroage/conversion, environmental protection. Here, we exploit a profile imaging technique to understand correlation between atomic structures oxygen evolution reaction (OER) in Mn3O4 nanoparticles. We image nanoparticles observe reconstructions (110) (101) planes. Mn3+ ions at surface, which are commonly considered active sites...
Abstract The structural engineering of 2D layered materials is emerging as a powerful strategy to design catalysts for high‐performance hydrogen evolution reaction (HER). However, the ultimate test this technology under typical operating settings lies in reduced performance and shortened lifespan these catalysts. Here, novel approach proposed efficient robust HER through out‐of‐plane deformation heterojunction using metal‐organic chemical vapor deposition. High‐yield, single‐crystalline WTe...
Abstract
The objective of the study was to investigate whether co-ingestion carbohydrate and protein as compared with alone augments muscle synthesis (MPS) during early exercise recovery. Two months old rats performed 10 repetitions ladder climbing 75% body weight attached their tails. Placebo (PLA), whey (WP), or plus (CP) then given by gavage. An additional group sedentary (SED) used controls. Blood samples were collected immediately at either 1 2 h after exercise. flexor hallucis longus excised...
To determine the effects and potential synergy of resistance training (RT), Huang Qi (HQ) herbal supplementation, electroacupuncture (EA) on skeletal muscle mass, contractile properties, components insulin signalling pathway in healthy Sprague Dawley rats.Female rats were randomly assigned to one five groups (n=8 each): control (CON), RT only, with EA (RT-EA), HQ (RT-HQ), combined both (RT-EA-HQ). was performed using ladder climbing every other day for 8 weeks. Sparse-wave applied 15...
<title>Abstract</title> Determining the active phase of an electrocatalyst at work is key to understanding its properties. However, operating morphology electrocatalysts challenging investigate because they can restructure into different motifs under applied potential due changes in their oxidation state. These transformations will further alter catalytic Here, we employ a multi-modal approach centered on electrochemical liquid cell transmission electron microscopy (EC-TEM) study evolution...
In-situ liquid cell electron and x-ray microscopy have enabled dynamic studies of electrochemical reactions in energy materials revealed relationships between the performance, structure, chemical composition these material systems. Such fundamental are critical to improving performance batteries, catalysts, other materials. Growing research interest systems has accelerated development in-situ liquid-electrochemical techniques into mature robust characterization workflows using novel...
The purpose of this study is to investigate the effect aerobic exercise intensity on kinetics reactive oxygen species and total antioxidant capacity during moderate treadmill running. Twelve healthy collegiate male students participated were randomly divided into two groups. Each group subjects trained at 80% 50% HR max respectively for 30 min per session, 3 times week 8 weeks. After 48 hours training running task was imposed each 70% VO 2max 90 minutes. Metabolic data monitored using a gas...