Branko Zugic
Somerville, Massachusetts, United States
1K followers
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About
Exploring technologies that are able to drive climate solutions today.
Activity
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One way of looking at synthetic food is as a way to feed people with less impact — less land use, less water, less CO2, less money. Less. But…
One way of looking at synthetic food is as a way to feed people with less impact — less land use, less water, less CO2, less money. Less. But…
Liked by Branko Zugic
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"Being a programmer in 2024 and not using AI is like being a programmer in 2022 and manually creating punched cards" – this was how one of the…
"Being a programmer in 2024 and not using AI is like being a programmer in 2022 and manually creating punched cards" – this was how one of the…
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🚀 Exciting News! 🚀 We are thrilled to announce that Mantel has been selected for the newest cohort of Third Derivative (D3), a global climate…
🚀 Exciting News! 🚀 We are thrilled to announce that Mantel has been selected for the newest cohort of Third Derivative (D3), a global climate…
Liked by Branko Zugic
Experience
Education
Publications
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Oxidative Dehydrogenation of Cyclohexane on Cobalt Oxide (Co3O4) Nanoparticles: The Effect of Particle Size on Activity and Selectivity
ACS Catalysis
The oxidative dehydrogenation of cyclohexane by cobalt oxide nanoparticles was studied via temperature programmed reaction combined with in situ grazing incidence X-ray absorption spectroscopy and grazing incidence small-angle X-ray scattering and theoretical calculations on model Co3O4 substrates. Both 6 and 12 nm Co3O4 nanoparticles were made through a surfactant-free preparation and dispersed on an Al2O3 surface formed by atomic layer deposition. Under reaction conditions the nanoparticles…
The oxidative dehydrogenation of cyclohexane by cobalt oxide nanoparticles was studied via temperature programmed reaction combined with in situ grazing incidence X-ray absorption spectroscopy and grazing incidence small-angle X-ray scattering and theoretical calculations on model Co3O4 substrates. Both 6 and 12 nm Co3O4 nanoparticles were made through a surfactant-free preparation and dispersed on an Al2O3 surface formed by atomic layer deposition. Under reaction conditions the nanoparticles retained their oxidation state and did not sinter. They instead underwent an assembly/disassembly process and could reorganize within their assemblies. The selectivity of the catalyst was found to be size- and temperature-dependent, with larger particles preferentially producing cyclohexene at lower temperatures and smaller particles predominantly resulting in benzene at higher temperatures. The mechanistic features thought to control the oxidative dehydrogenation of cyclohexane and other light alkanes on cobalt oxide were established by carrying out density functional theory calculations on the activation of propane, a surrogate model alkane, over model Co3O4 surfaces. The initial activation of the alkane (propane) proceeds via hydrogen abstraction over surface oxygen sites. The subsequent activation of the resulting alkoxide intermediate occurs at a second surface oxygen site to form the alkene (propene) which then desorbs from the surface. Hydroxyl recombination results in the formation of water which desorbs from the surface. Oxygen is necessary to regenerate the surface oxygen sites, catalyze C–H activation steps, and minimize catalyst degradation.
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Hydrogen Production from Methanol over Gold Supported on ZnO and CeO2 Nanoshapes
Journal of Physical Chemistry C
In the present study we have found that gold supported on CeO2 and ZnO with well-defined crystal structures or shapes is an excellent catalyst for the low-temperature (175−225 °C) steam reforming of methanol (SRM). We have compared the active nature of gold dispersed on {0001} surfaces of ZnO nanorods and polyhedra to our previous work, which demonstrates that TEM-invisible gold dispersed on the {110} surfaces of CeO2 catalyzes the SRM reaction in a cooperative mechanism with CeO2. Similar to…
In the present study we have found that gold supported on CeO2 and ZnO with well-defined crystal structures or shapes is an excellent catalyst for the low-temperature (175−225 °C) steam reforming of methanol (SRM). We have compared the active nature of gold dispersed on {0001} surfaces of ZnO nanorods and polyhedra to our previous work, which demonstrates that TEM-invisible gold dispersed on the {110} surfaces of CeO2 catalyzes the SRM reaction in a cooperative mechanism with CeO2. Similar to Au−CeO2, we have found that Au−O bonds are essential species for SRM over Au−ZnO and the same apparent activation energy (110−120 kJ·mol−1) of the reaction was calculated for both catalysts. On the basis of temperature-programmed surface reaction/mass spectrometry analysis, we determined that the SRM reaction on both Au−ZnO and Au−CeO2 involves methanol dehydrogenation, methyl formate hydrolysis, and formic acid decomposition steps to produce CO2 and H2. Better than 95% catalyst selectivity to CO2 was found over the temperature range from 175 to 250 °C for both catalysts. In the presence of methanol, the water−gas shift reaction is suppressed and is not part of the mechanism at temperatures below 250 °C. The SRM stability of the Au−ZnO and Au−CeO2 systems is good for practical application of this type catalyst.
Other authorsSee publication -
Nucleation and Growth of Polymorphs of Barbital on Chemically Modified Surfaces in Microfluidic Channels
MRS 2005 Fall Meeting Proceedings
Crystallization experiments have been carried out in microfluidic devices to screen for polymorphs by crystallization on a range of surfaces. These devices consist of PDMS (polydimethylsiloxane) patterned with microchannels and then bonded to self-assembled monolayers (SAMs) of organic molecules on gold substrates. Barbital was crystallized in microchannels over five different SAMs functionalized with polar and nonpolar organic groups. Growth of polymorphs was examined under thermodynamic…
Crystallization experiments have been carried out in microfluidic devices to screen for polymorphs by crystallization on a range of surfaces. These devices consist of PDMS (polydimethylsiloxane) patterned with microchannels and then bonded to self-assembled monolayers (SAMs) of organic molecules on gold substrates. Barbital was crystallized in microchannels over five different SAMs functionalized with polar and nonpolar organic groups. Growth of polymorphs was examined under thermodynamic conditions from solutions at room temperature and under kinetic conditions by rapid cooling. The results of these experiments and the influence of chemically modified surfaces in microchannels in controlling polymorphism are discussed.
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Patents
Languages
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English
Native or bilingual proficiency
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Serbian
Native or bilingual proficiency
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French
Professional working proficiency
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Spanish
Limited working proficiency
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Hindi
Elementary proficiency
More activity by Branko
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Our Equity Crowdfunding Campaign is almost here! Learn more soon about becoming an investor. Visit our website today for more information about our…
Our Equity Crowdfunding Campaign is almost here! Learn more soon about becoming an investor. Visit our website today for more information about our…
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Last Thursday Integrated Lab Solutions celebrated the official opening of our new #production #hall, marking a 25% increase in our much-needed…
Last Thursday Integrated Lab Solutions celebrated the official opening of our new #production #hall, marking a 25% increase in our much-needed…
Liked by Branko Zugic
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This week we gathered our 20 Kavli Institutes to foster discussion across the fields of astrophysics, nanoscience, neuroscience and theoretical…
This week we gathered our 20 Kavli Institutes to foster discussion across the fields of astrophysics, nanoscience, neuroscience and theoretical…
Liked by Branko Zugic
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Last week I had the pleasure of tracing the roots of Integrated Lab Solutions together with our team of Group Leaders through 3 different…
Last week I had the pleasure of tracing the roots of Integrated Lab Solutions together with our team of Group Leaders through 3 different…
Liked by Branko Zugic
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Congrats to Gabriel Halford for the cover art, and thanks to Nanoscale (Nanoscience #RSCNano) for highlighting our paper! We're excited to share this…
Congrats to Gabriel Halford for the cover art, and thanks to Nanoscale (Nanoscience #RSCNano) for highlighting our paper! We're excited to share this…
Liked by Branko Zugic
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This “butter” is made by turning CO2 into fat molecules, so it doesn’t require animals or farmland to produce. The start-up behind it says producing…
This “butter” is made by turning CO2 into fat molecules, so it doesn’t require animals or farmland to produce. The start-up behind it says producing…
Liked by Branko Zugic
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Come and speak with our technical sales experts Lukas Zobel and Yuan Seeman at BOOTH NUMBER 9 at the 18th ICC International Congress on Catalysis in…
Come and speak with our technical sales experts Lukas Zobel and Yuan Seeman at BOOTH NUMBER 9 at the 18th ICC International Congress on Catalysis in…
Liked by Branko Zugic
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Just over a week ago, I completed my 6-month-long co-op experience at Lydian, and I can say without a shadow of a doubt that this has been the most I…
Just over a week ago, I completed my 6-month-long co-op experience at Lydian, and I can say without a shadow of a doubt that this has been the most I…
Liked by Branko Zugic
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Having a great time at Study Section for the American Cancer Society here in Atlanta. Last night I got to meet the President, advocate for biomedical…
Having a great time at Study Section for the American Cancer Society here in Atlanta. Last night I got to meet the President, advocate for biomedical…
Liked by Branko Zugic
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Donald Aubrecht and Chris Kennedy testing out our super wide angle, ultra low-light performance lens in our underwater optical test tank earlier this…
Donald Aubrecht and Chris Kennedy testing out our super wide angle, ultra low-light performance lens in our underwater optical test tank earlier this…
Liked by Branko Zugic
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#MTO- Methanol to Olefins signifies a promising route to transform green methanol into valuable #SAF or #Marine fuel. Exciting news as we near…
#MTO- Methanol to Olefins signifies a promising route to transform green methanol into valuable #SAF or #Marine fuel. Exciting news as we near…
Liked by Branko Zugic
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