Article
Biochemistry & Molecular Biology
Gajanan S. Ghodake, Dae-Young Kim, Surendra K. Shinde, Deepak P. Dubal, Hemraj M. Yadav, Verjesh Kumar Magotra
Summary: The study focused on examining the effect of air annealing temperatures on the physicochemical properties of electrochemically synthesized cadmium selenium telluride (CdSe0.6Te0.4) samples for potential application in photoelectrochemical solar cells. The results demonstrated that annealing temperatures influenced the crystal structure and efficiency of the samples, indicating a significant impact on the overall performance of the solar cells.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Electrochemistry
Ozlem Uguz Neli, Oezlem Budak, Atif Koca
Summary: Cadmium zinc sulfoselenide (CdZnSSe) and reduced graphene oxide-cadmium zinc sulfoselenide (RGO)-CdZnSSe composite-based photoelectrodes were fabricated using a facile, simultaneous co-electrodeposition method for the first time. The rCV technique allowed for homogeneous decoration of CdZnSSe particles among RGO sheets, resulting in improved photoelectrochemical performance in hydrogen evolution. The Cd0.8Zn0.2S0.2Se0.8 photodecoration demonstrated the highest photocurrent density (4.08 mA cm-2), which was further increased to 5.00 mA cm-2 by decorating with RGO. The proposed rCV technique showed superiority in fabricating well-controlled RGO-CdZnSSe composite photoelectrodes.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Applied
Mitsuru Tanaka, Yasuaki Matsuda, Masanari Takahashi, Shinya Higashimoto
Summary: Copper indium sulfide (CIS) was prepared via co-electrodeposition of Cu-In alloy on Mo electrode, followed by sulfurization with solid sulfur. The morphology, crystal structures, and In/Cu compositions of CIS were influenced by the preparation conditions of Cu-In alloy. The optimized CIS exhibited a chalcopyrite structure with an In/Cu ratio of 1.0 and a band-gap of approximately 1.5 eV. The Pt-In2S3/CIS photoelectrode demonstrated high photoelectrochemical water splitting activity with a Faradic efficiency of 83.4% at +0.1 V vs. RHE, producing H2 at a rate of 50 mu mol h-1 cm-2. The co-electrodeposition method enabled the facile fabrication of CIS, which showed promising performance as a photo-absorber for photocatalytic water splitting.
Article
Chemistry, Physical
Kun Hee Lee, Wonhyo Kong, Myeongjin Han, Da Jung Park, Jee Hyuk Ahn, Seung Zeon Han, Young-Bae Park, Kyu Hwan Lee, Seunghoe Choe
Summary: Nanocrystalline CuAg foils were fabricated with high strength, electrical conductivity, and moderate ductility. Mild annealing further improved the strength and conductivity of the foils to achieve properties comparable to those of deformed CuAg of greater thicknesses. However, annealing at higher temperatures resulted in decreased strength and increased conductivity of the foils due to grain boundary segregation and precipitation of Ag atoms.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Sameerah I. Al-Saeedi
Summary: This study compares the effects of different nanostructured ZnO photoelectrodes on structural, optical, and PEC hydrogen production efficiency, as well as electrode stability. The results show that hexagonal nanorod array morphology offers low-cost, high-quality PEC performance and durability.
Article
Chemistry, Multidisciplinary
Xin Sun, Zhineng Lan, Min Wang, Qi Geng, Xiaojun Lv, Meicheng Li
Summary: This study investigates the partial substitution of La3+ ions in LaFeO3 with Ag+ ions to enhance the photoelectrochemical performance. Experimental and computational studies show that Ag-substitution improves surface charge transfer kinetics through introducing active electronic states and increasing electrochemically active surface areas. Furthermore, Ag-substitution decreases grain boundary number and increases majority carrier density, promoting bulk charge transports and reducing bandgap energy. After 8% Ag-substitution, the photocurrent density of LaFeO3 is enhanced by more than 6 times, exhibiting the highest photocurrent gain compared to other substitutions. This work provides insights into the mechanism of enhanced photoelectrochemical performance by doping or substitution.
Article
Materials Science, Multidisciplinary
Chih-Jui Chang, Chih-Wei Lai, Wei-Cheng Jiang, Yi-Syuan Li, Changsik Choi, Hsin-Chieh Yu, Shean-Jen Chen, YongMan Choi
Summary: In this study, CuO thin films were prepared using the sol-gel spin coating method, and electrodeposition was applied to fabricate Cu2O thin films to investigate the effects of aging time and layer dependency. The fully oxidized CuO thin films exhibited higher efficiency in photoconversion compared to Cu2O thin films.
Article
Chemistry, Physical
Hoki Son, Periyayya Uthirakumar, Tae-Hoon Chung, A. Y. Polyakov, In-Hwan Lee
Summary: The study focused on morphologically tuned nanoporous GaN photoelectrodes and the influence of halogen treatment, demonstrating a significant improvement in the efficiencies of photoelectrochemical devices, particularly in terms of applied bias photon-to-current efficiency.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Mahmoud Abdelfatah, Nourhan Darwesh, Hoda Atta, Amr M. Beltagi, Baoquan Sun, Abdelhamid El-Shaer, Walid Ismail
Summary: The electrodeposition technique was used to grow nanostructured Cu2O thin films with different pH values, and their morphological, structural, optical, electrical, and photoelectrochemical properties were investigated. The results indicate that the Cu2O thin films are suitable for applications such as biosensors, solar cells, and supercapacitors.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Johanna Eichhorn, Simon P. Lechner, Chang-Ming Jiang, Giulia Folchi Heunecke, Frans Munnik, Ian D. Sharp
Summary: Ammonia annealing significantly improves the crystallinity and material quality of tantalum nitride thin films, leading to a better understanding of its fundamental semiconductor properties. However, excessive annealing temperatures can cause material decomposition and reduce performance. The high material quality allows for the clear identification of the Ta3N5 bandgap as indirect, providing a foundation for further optimization of photoanodes.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Pan Wang, Zhifeng Liu, Dong Chen, Shaoce Zhang, Guozhen Fang, Changcun Han, Zhengwang Cheng, Zhengfu Tong
Summary: This study investigated the PEC performance of p and n-type Cu2O, exploring a dual-photoelectrode tandem PEC cell for the first time. By using electron capture and hole transfer layers, the photoelectrodes achieved better charge separation efficiency and faster charge transfer kinetics, leading to an unassisted photocurrent density of 0.09 mA/cm(2) after 1000 s of illumination. The research provides a novel platform for designing and fabricating various PEC energy conversion devices with excellent performance.
Article
Chemistry, Multidisciplinary
Florin Andrei, Valentin Ion, Ruxandra Birjega, Maria Dinescu, Nicoleta Enea, Dan Pantelica, Maria Diana Mihai, Valentin-Adrian Maraloiu, Valentin Serban Teodorescu, Ioan-Cezar Marcu, Nicu Doinel Scarisoreanu
Summary: The study investigates the formation of self-assembled nanodomains in LaFeO3 epitaxial thin films and their effects on the photoelectrochemical properties, revealing detrimental effects on PEC functional properties when nanopyramids-like domains appear after a thickness threshold. The research provides insights into the structural and stoichiometric features that influence the photocurrent density and onset potential exhibited by LFO photoelectrodes. Moreover, the highest photocurrent density values were observed for the thinnest LFO/Nb:SrTiO3 sample, showing excellent stability over time and unbiased hydrogen evolution from water.
Article
Engineering, Environmental
Piangjai Peerakiatkhajohn, Jung-Ho Yun, Teera Butburee, Hongjun Chen, Supphasin Thaweesak, Miaoqiang Lyu, Songcan Wang, Lianzhou Wang
Summary: A novel bifunctional photoelectrochemical system utilizing TiO2-1 wt% Au@TiO2/Al2O3/Cu2O multi-layered p-type photoelectrodes demonstrated high efficiency in both hydrogen production and degradation of humic acid, with humic acid acting as a sacrificial electron donor. The system exhibited a high photocurrent density and solar-to-hydrogen conversion efficiency, showcasing the potential of bias-free artificial photosynthesis PEC systems.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Kaisei Wakishima, Tomohiro Higashi, Akira Nagaoka, Kenji Yoshino
Summary: This study established a carbon-free method for the fabrication of CuBi2O4 photocathodes and investigated their photoelectrochemical properties, providing rational guidelines for visible-light-absorbing p-type metal oxide-based photoelectrodes.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Yuan -Wen Hsiao, Shang-Ren Chee, Hsuan-Ta Wu, Chuan-Feng Shih
Summary: This research investigates the transport and thermoelectric behaviors of CZTSSe thin films. Both p-type and n-type films were successfully synthesized to comprehensively study the characteristics of CZTS. The conductivity and carrier concentration increased with higher Cu contents, changing the conducting type from p-type to n-type. The band gap decreased and the full width at half maximum increased with increased Cu content. The proposed n-type CZTS with Cu/Zn + Sn tilde 1.01 and Zn/Sn tilde 1.1 had the best power factor.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Killian R. Tallman, Garrett P. Wheeler, Christopher J. Kern, Eli Stavitski, Xiao Tong, Kenneth J. Takeuchi, Amy C. Marschilok, David C. Bock, Esther S. Takeuchi
Summary: Ni-rich NMC materials show promise as Li-ion cathodes, but suffer from capacity fade due to structural degradation over extended cycling. Operando XAS studies revealed the structural response and key mechanistic components of Ni-rich NMC materials during cycling, providing insights for future electrode design.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Do-Hwan Nam, Margaret A. Lumley, Kyoung-Shin Choi
Summary: Desalination is seen as a viable strategy to address the global challenge of freshwater scarcity, and the development of electrochemical desalination cells with energy storage capabilities shows promise in tackling challenges at the water-energy nexus. The Perspective discusses three types of electrochemical desalination cells utilizing redox reactions and compares their advantages and challenges, aiming to inspire researchers to develop effective approaches for practical and efficient desalination in the future.
ACS ENERGY LETTERS
(2021)
Article
Energy & Fuels
Dongho Lee, Wennie Wang, Chenyu Zhou, Xiao Tong, Mingzhao Liu, Giulia Galli, Kyoung-Shin Choi
Summary: The surface Bi:V ratio has a significant impact on the properties of BiVO4 photoanodes, even for the same facet, according to the study. This finding sheds light on the importance of surface composition in influencing the behavior of photoelectrodes for solar fuel production.
Article
Electrochemistry
Calvin D. Quilty, Patrick J. West, Garrett P. Wheeler, Lisa M. Housel, Christopher J. Kern, Killian R. Tallman, Lu Ma, Steven Ehrlich, Cherno Jaye, Daniel A. Fischer, Kenneth J. Takeuchi, David C. Bock, Amy C. Marschilok, Esther S. Takeuchi
Summary: This study investigates the degradation of the cathode in NMC811/graphite batteries under extreme fast charging conditions. The results show that the oxidation state of Ni and Co changed more significantly under a 1C charge rate, but no surface reconstruction of NMC was observed in the recovered electrodes. Furthermore, a greater contraction of the unit cell volume under the 1C rate may reduce structural distortion caused by delithiation.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Michael T. Bender, Kyoung-Shin Choi
Summary: This study quantitatively examines the impact of two different dehydrogenation mechanisms on the oxidation of HMF and its intermediates, providing new insights for the rational design of more efficient electrochemical dehydrogenation catalysts.
Article
Chemistry, Multidisciplinary
Xin Yuan, Kwanpyung Lee, Michael T. Bender, J. R. Schmidt, Kyoung-Shin Choi
Summary: This study elucidates the key mechanistic differences between hydrogenation and hydrogenolysis reactions and demonstrates that lowering the pH can promote the hydrogenolysis of aldehydes and alcohols.
Article
Chemistry, Multidisciplinary
Wennie Wang, Marco Favaro, Emily Chen, Lena Trotochaud, Hendrik Bluhm, Kyoung-Shin Choi, Roel van de Krol, David E. Starr, Giulia Galli
Summary: This study presents a combined computational and experimental investigation on the adsorption of water on the Mo-doped BiVO4(010) surface. It reveals the influence of excess electrons on the dissociation of water and the hydroxyl-induced alterations of the surface electronic structure. The dissociation of water stabilizes the formation of a small electron polaron on the VO4 tetrahedral site and enhances the concentration of localized electronic charge at the surface.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
McKenna K. Goetz, Michael T. Bender, Kyoung-Shin Choi
Summary: For the valorization of biomass intermediates, selective alcohol oxidation is beneficial. This study demonstrates that NiOOH catalyst can selectively convert glycerol to 1,3-dihydroxyacetone by controlling the reaction conditions to favor secondary alcohol oxidation. The rational production method enables predictive control over selectivity without altering the catalyst composition.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Michael T. Bender, Xin Yuan, McKenna K. Goetz, Kyoung-Shin Choi
Summary: This article discusses the importance and potential applications of electrochemical biomass conversion, focusing on recent developments in electrochemical hydrogenation, hydrogenolysis, and dehydrogenation reactions for biomass conversion using biomass-derived 5-hydroxymethylfurfural (HMF) as a model molecule. The article provides insights into the electrocatalysts, reaction conditions, and mechanisms of each reaction, aiming to offer researchers a foundational understanding of electrochemical hydrogenation, hydrogenolysis, and dehydrogenation reactions for biomass conversion.
Article
Chemistry, Physical
Do-Hwan Nam, Kyoung-Shin Choi
Summary: Phosphorus is important for fertilizer and industrial manufacturing, but global phosphate rock reserves are limited. In this study, Bi/BiPO4 electrodes are used to construct phosphate removal and recovery cells. These cells selectively remove and recover phosphate as phosphoric acid without additional acid or byproduct wastes, offering a sustainable phosphate cycle.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Dae Han Wi, Margaret A. Lumley, Zhaoyi Xi, Mingzhao Liu, Kyoung-Shin Choi
Summary: Many semiconductor photoelectrodes used for solar fuel production require buffer and protection layers to enhance efficiency and stability. The abilities of various buffer and protection layers to extract electrons from Cu2O have never been directly evaluated. This study demonstrates the use of TEMOL as an effective electron scavenger to evaluate changes caused by buffer and protection layers in Cu2O, and compares the performances of ZnO and TiO2 layers on Cu(2)O for electron extraction and photocorrosion suppression.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xin Yuan, Kwanpyung Lee, J. R. Schmidt, Kyoung-Shin Choi
Summary: This study demonstrates that halide adsorption on Cu electrode can effectively suppress the hydrogen atom transfer (HAT) reaction during the reductive upgrading of 5-hydroxymethylfurfural (HMF), leading to enhanced production of 2,5-dimethylfuran (DMF). The identity and concentration of the halide, as well as the reduction conditions, were found to affect the halide adsorption on Cu, and optimal halide coverages were identified to maximize the selectivity for DMF. Experimental and computational results provide a detailed understanding of the effects of halide adsorption at the atomic level.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Michael T. Bender, Kyoung-Shin Choi
Summary: This study provides a comprehensive understanding of the mechanism of primary amine oxidation on NiOOH. The authors found a potential-dependent pathway, involving hydride transfer to Ni4+ sites, as the dominant pathway for amine oxidation. The effects of amine concentration, solution pH, applied bias, and deuterium substitution on the two oxidation pathways were also examined, shedding light on their mechanisms and rate-controlling factors.
Article
Chemistry, Physical
Calvin D. Quilty, Patrick J. West, Wenzao Li, Mikaela R. Dunkin, Garrett P. Wheeler, Steven Ehrlich, Lu Ma, Cherno Jaye, Daniel A. Fischer, Esther S. Takeuchi, Kenneth J. Takeuchi, David C. Bock, Amy C. Marschilok
Summary: This article reviews the recent developments in understanding the capacity fade mechanisms in NMC lithium-ion batteries through operando hard X-ray probes, surface sensitive soft X-ray characterization, and isothermal microcalorimetry. A case study on the effect of charging potential on NMC811 batteries during extended cycling illustrates the benefits of these approaches.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Youn Jeong Jang, Taylor A. Evans, Bipasa Samanta, Keyu Zeng, Maytal Caspary Toroker, Kyoung-Shin Choi
Summary: Studying the ENRR properties of Bi, Sb, and BiSb alloy reveals that the formation of BiSb alloy enhances the faradic efficiency for NH3 production. While Bi and Sb show comparable ENRR performances, the BiSb alloy distinctly increases the faradic efficiency.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)