Article
Chemistry, Applied
Martin Hayes, Ronan Bellabarba, Xavier Baucherel, Javad Tabatabaei
Summary: A series of studies demonstrate how the technique of methanol adsorption and desorption can provide useful technical information in an industrial setting, supporting the selection of catalyst candidates and investigating reduced performance. The studies show how methanol can inform on the surface and catalytic performance of materials in selective oxidations, and how the technique can help understand defects in industrially manufactured products.
TOPICS IN CATALYSIS
(2021)
Article
Astronomy & Astrophysics
W. M. Farrell, P. Prem, O. J. Tucker, D. M. Hurley, B. A. Cohen, M. Benna
Summary: This study models the expected local exosphere created by water outgassing from a lunar lander plume deposit. It finds that water molecules with a desorption activation energy greater than 0.7 eV are retained until later local times, resulting in a lingering exosphere emitted from the lander deposit region.
Article
Chemistry, Multidisciplinary
Shadi Al-Nahari, Eddy Dib, Claudia Cammarano, Etienne Saint-Germes, Dominique Massiot, Vincent Sarou-Kanian, Bruno Alonso
Summary: The use of mineralizing agents (F- or OH-) in hydrothermal synthesis directly affects the distribution of Al sites in ZSM-5 zeolites. The Si/Al ratio impacts the proportions of Al sites for F-, whereas it remains constant for OH-. This understanding provides new and simple opportunities to control the acidity of zeolites.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Maximilian Goeckeler, Cornelius M. Berger, Maximilian Purcel, Ralf Bergstraesser, Arndt-Peter Schinkel, Martin Muhler
Summary: In this study, carbon black was functionalized through gas-phase oxidation using nitric acid vapor at 150 degrees C, and the decomposition mechanisms of oxygen-containing surface groups were analyzed through temperature-programmed desorption (TPD) and temperature-programmed reduction (TPR) experiments. The increase in duration of HNO3 functionalization led to an enrichment of acidic surface groups, with desorbed H2O originating from chemisorbed water bound to carboxylic acid groups and condensation reactions of carboxylic acids and phenols. Additionally, the selective reduction of phenols and carbonyls by H2 during TPR resulted in the appearance of a new CO2 evolution peak at 575 degrees C, indicating the hydrolysis of anhydrides and lactones.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Takafumi Ishii, Jun-ichi Ozaki
Summary: By studying the hydrogen desorption profiles of carbon materials, the spatial distribution of their edge sites can be revealed. Activated carbons, carbon blacks, and rGOs exhibit uniform distribution of edge hydrogen, while graphite, high-temperature treated carbon, and CNTs have heterogeneous distribution.
Article
Chemistry, Multidisciplinary
Niklas Luhmann, Robert G. West, Josiane P. Lafleur, Silvan Schmid
Summary: We propose a new method for quantitatively analyzing mixtures of semivolatile chemical compounds by integrating thermal desorption with nano electromechanical infrared spectroscopy (NEMS-IR-TD). In this technique, the analyte mixture is deposited on the surface of a NEMS sensor via nebulization and then desorbed under vacuum using heating. The desorption process is monitored in situ via infrared spectroscopy and thermogravimetric analysis, enabling selective identification and analysis of the mixture.
Article
Chemistry, Multidisciplinary
Chin-Te Hung, Linlin Duan, Tiancong Zhao, Liangliang Liu, Yuan Xia, Yupu Liu, Pengpeng Qiu, Ruicong Wang, Zaiwang Zhao, Wei Li, Dongyuan Zhao
Summary: In this study, zeolite@mesoporous silica core-shell nanospheres with a gradient porous structure were successfully synthesized using a micellar dynamic assembly strategy. These nanospheres are highly dispersed in solvents, with uniform micropores in the inner core and a gradient tubular mesopore shell. As a result, they exhibit excellent catalytic performance and high stability even in the presence of water interference.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Simoni Da Ros, Karen Aline Valter Flores, Marcio Schwaab, Elisa Barbosa-Coutinho, Nadia R. C. Fernandes, Jose Carlos Pinto
Summary: Temperature-programmed reduction (TPR) and temperature-programmed desorption (TPD) are commonly used techniques for catalyst characterization, with empirical and phenomenological modeling approaches being compared in this study for the first time. The results suggest that phenomenological modeling approach allows for more accurate quantification and discrimination of distinct active sites in catalysts.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Nathan B. Jones, Bradley Gibbons, Amanda J. Morris, John R. Morris, Diego Troya
Summary: There is a strong demand for materials that can safely and reversibly store the toxic and highly reactive diborane gas at room temperature. This study investigates the interfacial chemistry of diborane storage in the UiO-66-NH2 metal-organic framework (MOF) and reveals a promising pathway for stable and long-term storage of diborane.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Geochemistry & Geophysics
Ashley R. Clendenen, Aleksandr Aleksandrov, Brant M. Jones, Peter G. Loutzenhiser, Daniel T. Britt, Thomas M. Orlando
Summary: Water and molecular hydrogen evolution from Apollo sample 14163 and lunar regolith simulants LMS-1 and LHS-1 were studied. LMS-1, LHS-1, and Apollo 14163 released water upon heating, whereas only the Apollo sample directly released measurable quantities of molecular hydrogen. The resulting H2O and H-2 TPD curves were fit using a model, and the most probable H2O formation and desorption effective activation energy were determined to be around 150 kJ mol(-1) for all samples.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Chemistry, Physical
Christopher J. Lee, Marcus A. Sharp, R. Scott Smith, Bruce D. Kay, Zdenek Dohnalek
Summary: The adsorption of C2 hydrocarbons on Fe3O4(001) was studied using various experimental methods, revealing different desorption characteristics for each molecule, with desorption energies increasing with bond order. The saturation coverage at 82K matches well with the 2-dimensional area determined from liquid densities.
Article
Chemistry, Physical
Pawan K. Soni, A. Bhatnagar, V Shukla, M. A. Shaz
Summary: Graphene templated Ti-Ni-Fe nanoparticles (TieNieFe@Gr) exhibit excellent catalytic effect on the de/re-hydrogenation characteristics of MgH2, lowering the onset desorption temperature and improving cycling performance. Analysis suggests possible electronic exchange between the catalyst and Mg/MgH2. Anchoring on the graphene template prevents agglomeration that would be detrimental to cycling performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Volkan Cinar, Audrey Dannar, Adrian Hunt, Alex C. Schilling, Yicheng Wang, Ryan T. Hannagan, Jessica Korotkin, Iradwikanari Waluyo, E. Charles H. Sykes
Summary: Single-atom catalysts, which are supported by oxides, metals, and carbonaceous supports, are a rapidly emerging field in which late-transition metal atoms play a crucial role. These catalysts hold promise for selective chemical reactions due to their well-defined active sites and reduced precious metal loading. However, there are challenges with oxide-supported single-atom catalysts, including deactivation and ongoing debates about the nature of the active sites.
Article
Chemistry, Multidisciplinary
Lisa Hoffellner, Elias M. Henoegl, Patrick Petschacher, Robert Schennach, Erich Leitner
Summary: Paper is a preferred material for various applications due to its environmental and economic characteristics, especially in packaging. Understanding the interactions between paper and different chemicals is crucial. Research on cellulose thin films' interactions with model compounds showed comparable results from different analytical methods, indicating diverse interactions between compounds and cellulose surfaces.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Colin J. Murphy, Ferry Anggoro Ardy Nugroho, Hanna Harelind, Lars Hellberg, Christoph Langhammer
Summary: Temperature-programmed desorption (TPD) is a method widely used in surface science to determine the bonding strength and coverage of molecular mono- or multilayers on a surface. Traditional TPD using mass spectrometric readout may have issues as the signal can come from other surfaces in the chamber, while plasmonic TPD directly measures the surface coverage of molecular species adsorbed on metal nanoparticles under ultrahigh vacuum conditions.
Article
Physics, Applied
Henry Wladkowski, Julian Duarte, Shashank R. Nandyala, Joshua S. Walker, Subash Kattel, Jeffrey L. Blackburn, Jeffrey A. Fagan, Jon M. Pikal, William D. Rice
Summary: This study presents a rapid, easy, and economical technique for producing PVAc-based NP-polymer films with high uniformity and excellent optical properties. The films exhibit robustness at low temperatures and are suitable for pulsed laser measurements. Incorporating one-dimensional SWCNTs and zero-dimensional Au NPs, these films maintain individualization of the nanotubes and low aggregation.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Severin N. Habisreutinger, Jeffrey L. Blackburn
Summary: The article reviews the successful integration of carbon nanotubes into high-efficiency solar cells based on metal-halide perovskites, highlighting critical issues that need to be addressed and potential opportunities for future applications in new photovoltaic devices and other emerging optoelectronic applications.
JOURNAL OF APPLIED PHYSICS
(2021)
Review
Chemistry, Physical
Eric Amerling, Haipeng Lu, Bryon W. Larson, Annalise E. Maughan, Alan Phillips, Evan Lafalce, Luisa Whittaker-Brooks, Joseph J. Berry, Matthew C. Beard, Z. Valy Vardeny, Jeffrey L. Blackburn
Summary: Research on derivatives of both bulk and low-dimensional metal halide perovskite semiconductors has grown significantly in the past decade, but the understanding and intentional applications of electronic doping have lagged behind. Successful electronic doping of these materials likely requires careful consideration and application of established doping strategies and mechanisms in the semiconductor field.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Ji Hao, Haipeng Lu, Lingling Mao, Xihan Chen, Matthew C. Beard, Jeffrey L. Blackburn
Summary: The study demonstrates high-performance circularly polarized light detectors by synthesizing 0D chiral copper chloride hybrids, showing superior optoelectronic properties. Results show that through the design of chiral heterostructures, high responsivity, competitive anisotropy factor, and low working voltage can be achieved for CPL detection.
Article
Energy & Fuels
Archana Sinha, Stephanie L. Moffitt, Katherine Hurst, Michael Kempe, Katherine Han, Yu-Chen Shen, David C. Miller, Peter Hacke, Laura T. Schelhas
Summary: The study confirms the effects of positive bias on module performance, and further investigates the underlying chemical degradation processes, revealing new degradation pathways. Under certain conditions, EVA encapsulant undergoes discoloration and delamination due to chemical reactions, resulting in significant photocurrent loss.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Multidisciplinary Sciences
Ji Hao, Young-Hoon Kim, Severin N. Habisreutinger, Steven P. Harvey, Elisa M. Miller, Sean M. Foradori, Michael S. Arnold, Zhaoning Song, Yanfa Yan, Joseph M. Luther, Jeffrey L. Blackburn
Summary: The study demonstrates a new method for optical memory and brain-inspired neuromorphic information processing, utilizing versatile heterojunctions between metal-halide perovskite nanocrystals and semiconducting single-walled carbon nanotubes to achieve long-lived, writable, and erasable persistent photoconductivity. This approach enables optical switching and basic neuromorphic functions at low energy consumption levels.
Article
Physics, Applied
Noah J. Stanton, Rachelle Ihly, Brenna Norton-Baker, Andrew J. Ferguson, Jeffrey L. Blackburn
Summary: Single-walled carbon nanotubes (SWCNTs) are promising materials for next-generation energy-harvesting technologies, such as thermoelectric generators, due to their customizable opto-electronic properties and high charge carrier mobilities. This study develops a method for solution-phase doping of highly enriched semiconducting SWCNTs wrapped in polymers using a p-type charge transfer dopant, F(4)TCNQ. Introduction of the dopant at different stages of the SWCNT dispersion process impacts the thermoelectric performance and alters polymer selectivity for semiconducting vs metallic SWCNTs. Solution-doped thin films of semiconducting SWCNTs perform similarly to solid-state doped films, suggesting potential benefits for high-throughput deposition techniques in SWCNT-based thermoelectric materials and devices.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Brandon R. Barnett, Hayden A. Evans, Gregory M. Su, Henry Z. H. Jiang, Romit Chakraborty, Didier Banyeretse, Tyler J. Hartman, Madison B. Martinez, Benjamin A. Trump, Jacob D. Tarver, Matthew N. Dods, Lena M. Funke, Jonas Borgel, Jeffrey A. Reimer, Walter S. Drisdell, Katherine E. Hurst, Thomas Gennett, Stephen A. FitzGerald, Craig M. Brown, Martin Head-Gordon, Jeffrey R. Long
Summary: The study explores the mechanism of chemical adsorption of hydrogen at open metal sites within metal-organic frameworks, demonstrating that adsorption is not always a concerted process and emphasizing the importance of probing kinetics in designing next-generation adsorbents.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
David Gerard Madden, Daniel O'Nolan, Nakul Rampal, Robin Babu, Ceren Camur, Ali N. Al Shakhs, Shi-Yuan Zhang, Graham A. Rance, Javier Perez, Nicola Pietro Maria Casati, Carlos Cuadrado-Collados, Denis O'Sullivan, Nicholas P. Rice, Thomas Gennett, Philip Parilla, Sarah Shulda, Katherine E. Hurst, Vitalie Stavila, Mark D. Allendorf, Joaquin Silvestre-Albero, Alexander C. Forse, Neil R. Champness, Karena W. Chapman, David Fairen-Jimenez
Summary: We are witnessing the dawn of hydrogen economy, where hydrogen is becoming a primary fuel for heating, transportation, and energy storage. Metal-organic frameworks (MOFs) have emerged as promising adsorbent materials for hydrogen storage, but their use has been limited by a lack of densification methods. In this study, researchers screened and analyzed a database of MOFs to find an optimal material for hydrogen storage, and successfully synthesized and evaluated a monolithic MOF with high storage performance at lower operating pressures.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Review
Energy & Fuels
Linda Zhang, Mark D. Allendorf, Rafael Balderas-Xicohtencatl, Darren P. Broom, George S. Fanourgakis, George E. Froudakis, Thomas Gennett, Katherine E. Hurst, Sanliang Ling, Chiara Milanese, Philip A. Parilla, Daniele Pontiroli, Mauro Ricco, Sarah Shulda, Vitalie Stavila, Theodore A. Steriotis, Colin J. Webb, Matthew Witman, Michael Hirscher
Summary: This review article discusses the physisorption of hydrogen in nanoporous materials for efficient hydrogen storage. The article covers the fundamentals of hydrogen adsorption in these materials, assessment of their storage performance, and recent advancements in the field. The article also explores the use of neutron scattering and computational methods for characterizing hydrogen adsorption and discovering new materials for hydrogen storage. Additionally, the article addresses important issues such as sustainable materials synthesis and improving reproducibility of experimental data.
PROGRESS IN ENERGY
(2022)
Proceedings Paper
Energy & Fuels
Archana Sinha, Katherine Hurst, Sona Ulicna, Laura T. Schelhas, David C. Miller, Peter Hacke
Summary: Bifacial technology in solar cells offers higher power output and lower levelized cost of energy compared to monofacial counterparts. Testing the adverse effects of ultraviolet-induced degradation on different high-efficiency silicon wafer-based bifacial cell technologies revealed various degrees of power loss and degradation pathways for different cell types.
2021 IEEE 48TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
(2021)
Article
Chemistry, Multidisciplinary
Ji Hao, Sanjini U. Nanayakkara, Eric J. Tervo, Jeffrey L. Blackburn, Andrew J. Ferguson
Summary: The advancements in low-power portable/wearable electronic devices require technologies that can provide power without bulky battery storage. Electronic ratchets, such as conjugated polymer-based and semiconducting single-walled carbon nanotube (s-SWCNT) channels, have been proposed as solutions to convert AC signals or electronic noise into stable DC power. These s-SWCNT electronic ratchets demonstrate higher output power and improved stability compared to polymer-based analogs, showing promise as energy harvesting devices for portable, low-power applications.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Physical
Eric Amerling, Yaxin Zhai, Bryon W. Larson, Yi Yao, Brian Fluegel, Zbyslaw Owczarczyk, Haipeng Lu, Luisa Whittaker-Brooks, Volker Blum, Jeffrey L. Blackburn
Summary: Excited-state interactions between organic and inorganic components in hybrid metal halide semiconductors were utilized to fabricate a one-dimensional lead iodide semiconductor with an internal charge separating junction. Spectroscopy measurements revealed discrete optical features and rapid separation of photogenerated charges in this heterostructure.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Hyun Suk Kang, Samuel Peurifoy, Boyuan Zhang, Andrew J. Ferguson, Obadiah G. Reid, Colin Nuckolls, Jeffrey L. Blackburn
Summary: The study used pump-probe ultrafast transient absorption spectroscopy and time-resolved microwave conductivity to investigate charge separation dynamics in excitonic heterojunctions. Results showed that charge carriers do not form bound charge transfer states, but instead become free/mobile charge carriers. The correlation between the techniques demonstrates the successful extraction of hole mobilities in single-walled carbon nanotubes.
MATERIALS HORIZONS
(2021)
Article
Chemistry, Multidisciplinary
Dana B. Sulas-Kern, Hanyu Zhang, Zhaodong Li, Jeffrey L. Blackburn
Summary: By studying the relationship between TMDC microstructure and defects with charge generation yield, lifetime, and mobility, we found that monolayer-rich MoS2 with a small fraction of defect-rich multilayer islands exhibit longer lifetimes and higher yields of mobile carriers, suggesting significant changes in photophysics from small changes in TMDC microstructure and defect density.
