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Nitrogen Reduction Reaction: Deposition, Characterization and Selectivity of Transition Metal (V, Co and Ti) Oxynitrides as Electrocatalysts

Description: The electrocatalytic nitrogen reduction reaction (NRR) is of considerable interest due to its potential for less energy intensive and environmentally friendly ammonia production which is critical for agricultural and clean energy applications. However, the selectivity of NRR compared to the hydrogen evolution reaction (HER) often poses challenges for various catalysts, including Earth-abundant transition metal oxynitrides like Ti, V, and Co. In this work, a comparative analysis of the selectivi… more
This item is restricted from view until January 1, 2025.
Date: December 2023
Creator: Chukwunenye, Precious O.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Chemically Optimized Cu Etch Bath Systems for High-Density Interconnects and the FTIR Operando Exploration of the Nitrogen Reduction Reaction on a Vanadium Oxynitride Electrocatalyst

Description: Printed circuit board manufacturing involves subtractive copper (Cu) etching where fine features are developed with a specific spatial resolution and etch profile of the Cu interconnects. A UV-Vis ATR metrology, to characterize the chemical transitions, has been developed to monitor the state of the bath by an in-situ measurement. This method provides a direct correlation of the Cu etch bath and was able to predict a 35% lower etch rate that was not predicted by the three current monitoring met… more
This item is restricted from view until September 1, 2027.
Date: August 2022
Creator: Caperton, Joshua M
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Biomimics of [FeFe]-hydrogenases incorporating redox-active ligands: synthesis, redox properties and spectroelectrochemistry of diiron-dithiolate complexes with ferrocenyl-diphosphines as Fe4S4 surrogates

Description: Article prepares and characterizes a small series of new [FeFe]-ase biomimics which contain a ferrocenyl diphosphine as a surrogate for the Fe₄S₄ moiety in the H-cluster of the enzyme. Mechanistic details of both proton reduction and H₂ oxidation have been studied by DFT allowing speculative reaction schemes to be developed.
Date: June 6, 2022
Creator: Orton, Georgia R. F.; Ghosh, Shishir; Alker, Lucy; Sarker, Jagodish C.; Pugh, David; Richmond, Michael G. et al.
Item Type: Refine your search to only Article
Partner: UNT College of Science
open access

Organic Collaborative Research Partnership Building: Researchers, Needle and Syringe Program Providers, and People Who Inject Drugs

Description: Article reporting on the use of an organic community research partnership-building approach between researchers, needle and syringe program (NSP) providers, and people who inject drugs (PWID) in Canberra ACT, Australia. Results found engaging in relationship building around partner priority activities created mutual understanding and trust premised in authenticity of the evolving partnership. The organic approach, which included a partner audit of the research tools for relevance, resulted in h… more
Date: October 21, 2021
Creator: Resiak, Danielle; Mpofu, Elias & Rothwell, Roderick
Item Type: Refine your search to only Article
Partner: UNT College of Health and Public Service
open access

The Amalgamation of Western and Eastern Influences in Julius Schloss's "First Chinese Rhapsody"

Description: The dissertation seeks to rediscover Julius Schloss, a German Jewish composer victimized by the Nazis. Except for the promising start of his career in his early years, Schloss suffered a hard life as an exiled refugee. However, his unusual experiences inspired him to compose two Chinese Rhapsodies during his last years of exile in Shanghai, in which he synthesized Western composition techniques and Chinese folk materials, amalgamating influences from both Western and Eastern music cultures. Foc… more
Date: August 2021
Creator: Cai, Ying (Pianist)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Beethoven's Orchestra at the Romantic Piano: Understanding the Piano Transcriptions of "Marcia alla turca" from Beethoven's The Ruins of Athens by Franz Liszt and Anton Rubinstein

Description: The transcriptions of Franz Liszt (1811-1886) and Anton Rubinstein (1829-1894) on Beethoven's "Marcia alla turca" serve as unique examples within the area of transcription since each of these important virtuosos transcribed the movement with drastically different results. Liszt's Capriccio alla turca (1846) is built on Beethoven's thematic materials although it is presented with a greatly embellished accompaniment providing countermelodies, expanded passages, and vigorous rhythmic features. In… more
Date: August 2021
Creator: Yoon, Jeongmi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Metal Oxynitrides: Tuning Metal-N and Metal-O Interactions for Improved Electrocatalytic Properties at the Liquid/Solid Interface

Description: Data management plan for the grant "Metal Oxynitrides: Tuning Metal-N and Metal-O Interactions for Improved Electrocatalytic Properties at the Liquid/Solid Interface." Research investigating the fundamental chemical interactions relevant to the conversion of dinitrogen to ammonia via more energy-efficient routes. The studies will help in understanding the chemical and material factors that are most important for optimizing new materials for ammonia production from dinitrogen, and applications t… more
Date: 2021-08-01/2024-07-31
Creator: Kelber, Jeffry A.; Cundari, Thomas R., 1964- & D'Souza, Francis
Item Type: Refine your search to only Text
Partner: UNT College of Science
open access

Acoustic Metasurface-Aided Broadband Noise Reduction in Automobile Induced by Tire-Pavement Interaction

Description: Article demonstrating a technique utilizing acoustic metasurfaces (AMSes) with high reflective characteristics using relatively lightweight materials for noise reduction without any change in mechanical strength or weight of the tire. The proposed design can significantly reduce the noise arising from tire–pavement interaction over a broadband of acoustic frequencies under 1000 Hz and over a wide range of vehicle speeds using a negative effective dynamic mass density approach.
Date: July 30, 2021
Creator: Heo, Hyeonu; Sofield, Matthew; Ju, Jaehyung & Neogi, Arup
Item Type: Refine your search to only Article
Partner: UNT College of Science
open access

A Comparative Analysis of the Orchestral and Piano Versions of Finlandia by Jean Sibelius in Relation to His Compositional Style, 1899–1904

Description: While he was composing his important orchestral tone poem Finlandia in 1899–1900, Jean Sibelius (1865–1957) made his own piano arrangement of it. The purpose of this study is to compare the piano arrangement and orchestral version and to see further the similarities with Sibelius's other piano compositions from the same time period (1899-1904). Through this study I have found compositional patterns, which are typical for the composer and defined his composition style for piano during his "Kalev… more
Date: May 2021
Creator: Teppo, Ruusamari
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Proton reduction by phosphinidene-capped triiron clusters

Description: This article prepares and examines Bis(phosphinidene)-capped triiron carbonyl clusters, including electron rich derivatives formed by substitution with chelating diphosphines as proton reduction catalysts.
Date: April 20, 2021
Creator: Rahaman, Ahibur; Lisensky, George C.; Haukka, Matti; Tocher, Derek A.; Richmond, Michael G.; Colbran, Stephen B. et al.
Item Type: Refine your search to only Article
Partner: UNT College of Science
open access

Sustainable Harm Reduction Needle and Syringe Programs for People Who Inject Drugs: A Scoping Review of Their Implementation Qualities

Description: This article is a review mapping the evidence on implementation qualities of sustainable harm reduction needle and syringe programs (NSPs). The emerging evidence suggests that sustainable NSP programs for people who inject drugs (PWID) require provider, consumer, and community engagement, supported by enabling health policies.
Date: March 5, 2021
Creator: Resiak, Danielle; Mpofu, Elias & Rothwell, Rodd
Item Type: Refine your search to only Article
Partner: UNT College of Health and Public Service
open access

On Polish groups admitting non-essentially countable actions

Description: Article addresses the question whether every Polish group that is not locally compact admits a Borel action on a standard Borel space whose associated orbit equivalence relation is not essentially countable. The authors e answer this question positively for the class of all Polish groups that embed in the isometry group of a locally compact metric space.
Date: December 29, 2020
Creator: Kechris, Alexander S.; Malicki, Maciej; Panagiotopoulos, Aristotelis & Zielinski, Joseph
Item Type: Refine your search to only Article
Partner: UNT College of Science
open access

Bohuslav Martinů's Oboe Concerto, H. 353: A New Piano Reduction of the Orchestral Score

Description: Bohuslav Martinů's "Concerto for Oboe and Small Orchestra" is one of the most frequently played pieces in the oboe repertoire. For this reason, it is often played with the piano reduction instead of the orchestra in oboe recitals. However, the existing piano reductions include many errors and discrepancies from the orchestral score, misrepresent the orchestration, sometimes fail to make the oboe entries clear, and tend to be unplayable for pianists. Moreover, the scores were published after th… more
Date: December 2020
Creator: Jeoung, Ko Eun
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Combinatorial-Based Testing Strategies for Mobile Application Testing

Description: This work introduces three new coverage criteria based on combinatorial-based event and element sequences that occur in the mobile environment. The novel combinatorial-based criteria are used to reduce, prioritize, and generate test suites for mobile applications. The combinatorial-based criteria include unique coverage of events and elements with different respects to ordering. For instance, consider the coverage of a pair of events, e1 and e2. The least strict criterion, Combinatorial Coverag… more
Date: December 2020
Creator: Michaels, Ryan P.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Electrocatalytic proton-reduction behaviour of telluride-capped triiron clusters: tuning of overpotentials and stabilization of redox states relative to lighter chalcogenide analogues

Description: Article investigating the utility of the non-biological element tellurium as a replacement for the widely biologically-utilized lighter chalcogenides sulfur and selenium in the realm of proton-reduction catalysis.
Date: May 14, 2020
Creator: Hrovat, David A.; Richmond, Michael G.; Rahaman, Ahibur; Lisensky, George C.; Browder-Long, Jess; Nordlander, Ebbe et al.
Item Type: Refine your search to only Article
Partner: UNT College of Science
open access

Electron Transfer Mediated by Iron Carbonyl Clusters Enhance Light-Driven Hydrogen Evolution in Water by Quantum Dots

Description: This article tests an assembly consisting of CdSe quantum dots and [Fe₃Te₂(CO)₉] as a catalytic system for proton reduction in aqueous solution.
Date: March 9, 2020
Creator: Richmond, Michael G.; Li, Chuanshuai; Rahaman, Ahibur; Lin, Weihua; Mourad, Hassan; Meng, Jie et al.
Item Type: Refine your search to only Article
Partner: UNT College of Science

Tchaikovsky's Piano Concerto No. 1 In B-Flat Minor, Op. 23: A Newly Arranged Edition of the Orchestral Reduction

Description: As it stands, only one arrangement of Tchaikovsky's Piano Concerto No. 1, Op. 23 orchestral reduction exists, which is by Tchaikovsky himself. A number of critical editions of the piece exist, but none of them cover the subject of the material within the orchestral reduction. Tchaikovsky wrote the reduction from a compositional rather than a pianistic perspective, thus some passages present awkward technical challenges. The purpose of this dissertation is ultimately to contribute to the reperto… more
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Date: December 2019
Creator: Parys, Marcin
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Detrimental Effects and Prevention of Acidic Electrolytes on Oxygen Reduction Reaction Catalytic Performance of Heteroatom-Doped Graphene Catalysts

Description: Article describes study in which the density functional theory (DFT) methods were applied to understand the inferior performance of doped graphene in acid.
Date: November 21, 2019
Creator: Ma, Jun; Gong, Lele; Shen, Yang; Sun, Defeng; Liu, Bowen; Zhang, Jing et al.
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Lithic Production at the Mesilla Phase Placitas Arroyo Site Complex Doña Ana County, New Mexico

Description: This study of lithic analysis shifts attention from typological studies to explicitly behavioral analyses, complimenting studies of both intrasite and intersite patterns of variability and change. Analysis of several assemblages from the Placitas Arroyo site complex reveals changing patterns of raw material procurement and selection, core reduction strategies, as well as tool production and discard. The most striking result thus far is the quite uniform emphasis on flake production from well-pr… more
Date: August 2019
Creator: Younger, Alexandra Carla
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Hydrogenase Biomimetics with Redox-Active Ligands: Synthesis, Structure, and Electrocatalytic Studies on [Fe₂(CO)₄(κ²-dppn)(µ-edt)] (edt = Ethanedithiolate; dppn = 1,8-bis(Diphenylphosphino)Naphthalene)

Description: This article reports the preparation and characterisation of the simple dppn complex,[Fe2(CO)4(κ2-dppn)(µ-edt)], together with an investigation of its proton-reduction ability.
Date: November 20, 2018
Creator: Ghosh, Shishir; Rana, Shahed; Hollingsworth, Nathan; Richmond, Michael G.; Kabir, Shariff E. & Hogarth, Graeme
Item Type: Refine your search to only Article
Partner: UNT College of Science
open access

Application of Statistical Physics in Human Physiology: Heart-Brain Dynamics

Description: This dissertation is devoted to study of complex systems in human physiology particularly heartbeats and brain dynamics. We have studied the dynamics of heartbeats that has been a subject of investigation of two independent groups. The first group emphasized the multifractal nature of the heartbeat dynamics of healthy subjects, whereas the second group had established a close connection between healthy subjects and the occurrence of crucial events. We have analyzed the same set of data and esta… more
Date: August 2018
Creator: Bohara, Gyanendra
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Flood Resilience Building in Thailand: Assessing Progress and the Effect of Leadership

Description: This article uses the United Nations International Strategy for Disaster Reduction 10 Essentials for Making Cities Resilient as guidelines to assess the progress of flood resilience building in Thailand.
Date: March 5, 2018
Creator: Khunwishit, Somporn; Choosuk, Chanisada & Webb, Gary
Item Type: Refine your search to only Article
Partner: UNT College of Public Affairs and Community Service
open access

Design Principle on Carbon Nanomaterials Electrocatalysts for Energy Storage and Conversion

Description: We are facing an energy crisis because of the limitation of the fossil fuel and the pollution caused by burning it. Clean energy technologies, such as fuel cells and metal-air batteries, are studied extensively because of this high efficiency and less pollution. Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential in the process of energy storage and conversion, and noble metals (e.g. Pt) are needed to catalyze the critical chemical reactions in these devices. Funct… more
Date: May 2017
Creator: Zhao, Zhenghang
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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