Article
Chemistry, Physical
Shi He, Yufeng Chen, Mengdi Wang, Hanggai Nuomin, Peter Novello, Xueqian Li, Siyuan Zhu, Jie Liu
Summary: Ammonia is a promising hydrogen mediator that reduces the cost of hydrogen transportation, but improvements are needed for extracting hydrogen. Ammonia electrolysis is a convenient method for low-cost hydrogen production. Nickel-cobalt nitride nanosheets show high electrocatalytic activity for the ammonia oxidation reaction in non-aqueous solutions.
Article
Engineering, Environmental
Xue Yang, Han Sun, Chuntong Liu, Le Yu, Haijun Chen
Summary: The addition of methanol into KPF6-DMF non-aqueous electrolyte effectively suppresses the poisoning of platinum electrode during ammonia electrolysis, resulting in enhanced electrochemical performance and more stable electrolysis process. This finding provides a promising strategy to prevent platinum electrode poisoning by rational electrolyte design.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Natalia S. Veizaga, Gustavo Mendow, Andres Felipe Quintero-Jaime, Angel Berenguer-Murcia, Sergio de Miguel, Emilia Morallon, Diego Cazorla-Amoros
Summary: The study focuses on the synthesis of mono- and bimetallic Pt-based electrocatalysts for ethanol electrooxidation in acidic media. Incorporation of Re promotes bond breaking of intermediates, while addition of Ir reduces electroactive surface area and decreases electrocatalytic performance.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hyunki Kim, Seokjin Hong, Hedam Kim, Yeji Jun, Soo Young Kim, Sang Hyun Ahn
Summary: This review discusses the importance and application prospects of ammonia oxidation reaction (AOR), and highlights the recent progress and strategies in electrical ammonia oxidation electrodes based on the AOR mechanism. Although the AOR mechanism remains unclear, most studies have focused on Pt catalysts.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Physical
Ryan J. Ouimet, Jennifer R. Glenn, Diana De Porcellinis, Andrew R. Motz, Marcelo Carmo, Katherine E. Ayers
Summary: This perspective discusses recent findings in the development of electrocatalysts for the next generation of PEM water electrolyzers, including opportunities to create catalyst architectures, the importance of demonstrating electrode manufacturing tools, and the usefulness of advanced characterization methods for large-scale deployment of water splitting devices.
Article
Engineering, Environmental
Changqing Jin, Fanglin Wu, Haibo Tang, Hongfei Pan, Zhida Chen, Rui Wang, Zihan Meng, Junsheng Li, Haolin Tang
Summary: This study successfully developed a highly active and anti-ammonia catalyst for hydrogen oxidation reaction by tuning the charge distribution of the support material through nitrogen-doping of carbon. The catalyst demonstrated superior activity and stability, facilitating the resistance to ammonia poisoning in hydrogen electrochemical purification devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Wasim U. Khan, Hassan S. Alasiri, Syed A. Ali, Mohammad M. Hossain
Summary: The emerging concept of the hydrogen economy faces challenges in hydrogen storage and transport. However, the utilization of ammonia as an energy carrier for on-site hydrogen generation through ammonia decomposition has gained attention. Recent investigations have explored the combination of ruthenium with cheaper transition metals to develop bimetallic catalysts suitable for ammonia decomposition. This review examines the trends, catalyst systems, metal type, support materials, promoter, synthesis techniques, and the kinetics and mechanism of ammonia decomposition.
Article
Biochemistry & Molecular Biology
Oscar Ramirez, Sebastian Bonardd, Cesar Saldias, Macarena Kroff, James N. O'Shea, David Diaz Diaz, Angel Leiva
Summary: The bimetallic NiPt nanoparticles were successfully loaded into alginate hydrogel beads through in situ reduction process, and the prepared hybrid hydrogels showed excellent catalytic activity and stability for the hydrolysis of ammonia borane to produce hydrogen.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Levent Semiz
Summary: This study developed a highly active and reusable platinum catalyst for the dehydrogenation of ammonia borane. The catalyst, prepared by alloying and dealloying platinum-aluminum alloy, exhibited the highest hydrogen generation rate and activation energy in methanol solution. Additionally, the catalyst demonstrated high durability when effective washing step was applied after each utilization.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Wanli Liang, Zhichen Le, Pengyu Dong, Zixuan Dan, Jiaxuan Chen, Hao Zhang, Jian Chen, Fangyan Xie, Nan Wang, Yanshuo Jin, Hui Meng
Summary: This study proposes a new PGM-free bifunctional hydrogen electrocatalyst, Janus Ni/W bimetallic materials. The synergistic effect of Ni and W in the bimetallic materials enhances the reaction kinetics of hydrogen evolution and hydroxide oxidation, resulting in the design of a high-efficiency and low-cost catalyst.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Environmental Sciences
Rongrong Fan, Zhaoqiang Li, Yu Wang, Yan Wang, Zhiyong Ding, Cheng Zhang, Na Kang, Xin Guo, Rong Wang
Summary: ZrO2 and WO3 additives were found to synergistically improve the activity and thermal stability of diesel oxidation catalysts, enhancing the oxidation reactions of CO, C3H6, and NO. ZrO2 improved metal dispersion and increased surface-chemisorbed oxygen, while WO3 increased active sites and metal dispersion in fresh samples.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Zexing Jiang, Tianqi Yu, Jinli Chen, Kexin Tan, Rui Deng, Anchao Zhou, Shibin Yin
Summary: Ammonia with a high hydrogen content is an ideal hydrogen carrier and ammonia electrooxidation is a promising technology for green and economic H2 production. However, the slow kinetics and competitive adsorption in ammonia oxidation reaction (AOR) limit its potential. In this study, a PtPb alloy nanocatalyst is synthesized through a one-step solvothermal method, which effectively improves AOR activity by regulating the electronic structure of Pt and inhibiting competitive adsorption. The improved performance is attributed to the properties of Pb and the electron interaction of PtPb, which effectively modulate the adsorption/desorption of intermediates. This work proposes a simple and effective strategy for designing efficient AOR catalysts, promoting the development of H2 production by AOR.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Huihuang Fang, Chen Liao, Quanying Cai, Fulan Zhong, Li Lin, Chongqi Chen, Yu Luo, Lilong Jiang
Summary: In this study, we systematically fabricated a series of PtxIry/XC-72 catalysts by tuning the Pt/Ir compositions. The results showed that Pt composition favors increasing current densities, while Ir composition facilitates reducing onset potentials in ammonia oxidation reaction (AOR). Additionally, the Pt - Ir nanoparticles exhibited a segregated Pt configuration on the topmost surface, which differs from the classic view for homogeneous alloys. The insights provided by this research contribute to catalyst engineering for AOR and ammonia fuel cells.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Jochen Schuetz, Heike Stoermer, Patrick Lott, Olaf Deutschmann
Summary: The study reveals that aging catalysts leads to a decline in catalytic activity due to particle sintering, and bimetallic catalysts undergo morphological changes during hydrothermal treatment, transforming from core-shell structures to heterogeneous agglomerates.
Article
Chemistry, Physical
Rozhin Darabi, Fadaa E. D. Alown, Aysenur Aygun, Qiang Gu, Fulya Gulbagca, Elif Esra Altuner, Hamdullah Seckin, Ismet Meydan, Gullu Kaymak, Fatih Sen, Hassan Karimi-Maleh
Summary: Platinum-based silver nanoparticles (Pt@Ag NPs) were synthesized using the green synthesis method and their catalytic effects on hydrogen production were investigated. The synthesized NPs were characterized using TEM, UV-Vis, XRD, and FTIR. The results showed that Pt@Ag NPs had an average size of 5.431 nm. The catalytic reaction for hydrogen production was accelerated as the concentrations of the substrate and catalysts increased, and hydrogen release increased. The use of Pt@Ag NPs in the hydrogen production process shows great promise for green energy studies due to its environmentally friendly, non-toxic, and low-cost nature.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
A. Aathif Basha, Attar Kubaib, Mohammad Azam
Summary: The properties of a set of compounds were comprehensively assessed using various analytical techniques, revealing their stability and favorable drug-like characteristics. Potential antiviral and antioxidant properties were predicted, indicating promise for biological efficacy.
COMPUTATIONAL AND THEORETICAL CHEMISTRY
(2024)
Article
Chemistry, Physical
Meiqi Liu, Baoming Hou, Yuheng Li, Yuyu Pan, Bing Yang
Summary: This paper investigates the application potential of thermally activated delayed fluorescent (TADF) molecules with donor-acceptor-donor-acceptor pi-conjugated macrocycle structures in organic light-emitting diodes. The study finds that the macrocyclic structure has a smaller energy gap between the first singlet excited state and the first triplet excited state compared to the linear structure. The TADF efficiency is also analyzed and explained based on spin-orbit coupling and intersystem crossing rates.
COMPUTATIONAL AND THEORETICAL CHEMISTRY
(2024)
Article
Chemistry, Physical
Run Liu, Jiahui Liu, Jiarui Fang, Xiruo Bai, Dan Wang, Yixuan Qie, Shuqi Zu, Guancheng Wang, Xinyi Sui, Runyao Chang, Yizhu Wang, Ziheng Li
Summary: This paper investigates the remodeling effect of H2O molecules and their adsorption behavior on Co2+-doped SnO2 (221) crystal plane materials. The results show that H2O molecules remodel the crystal plane by creating oxygen defects, leading to hydroxylation. The hydroxylated crystal surface adsorbs O2 and then H2O molecules, affecting the electrical conductivity of the crystal plane.
COMPUTATIONAL AND THEORETICAL CHEMISTRY
(2024)
Article
Chemistry, Physical
Marisol Ibarra-Rodriguez, Paul Horley, Mario Sanchez
Summary: In this study, the functionalized borophene was investigated as a potential sensor or transporter of glucose for biomedical applications. The adsorption of glucose molecules on different boron-based complexes was studied, and the results showed that these complexes have high binding energies and can efficiently adsorb glucose molecules. The findings suggest that borophene-based systems with different oxidation states hold promise for intelligent drug delivery and biosensor design.
COMPUTATIONAL AND THEORETICAL CHEMISTRY
(2024)
Article
Chemistry, Physical
Syed Hassan Sarwar, Saad Jawaid Khan, Syed Faraz Jawed
Summary: The medical community is currently focusing on targeted and controlled drug delivery, and many researchers are utilizing computational resources to understand drugnanocarrier combinations and develop targeted drug delivery systems. This study used molecular dynamics to investigate the encapsulation capacity of Carbazochrome, a hemostatic drug, in Single-Walled Carbon Nanotubes of different morphological variations. The results showed that the nanotube radius and length had the most significant impact on the encapsulation capacity, followed by nanotube chirality. Temperature also affected the drug encapsulation when the nanotube radius was not very large and the chiral angle was near 30 degrees.
COMPUTATIONAL AND THEORETICAL CHEMISTRY
(2024)
Article
Chemistry, Physical
Yinquan Sui, Mengying Sun, Yongxin Wang, Zhitong Xu, Jinglu Yan, Huanpeng Liu
Summary: In this study, the structural and hydrogen storage properties of loaded Pt atoms were investigated using density functional theory (DFT) with and without substitution of B atoms on the edges of conical graphene layers (CGL). It was found that the position of the substituted B atom at the edge of the CGL has an important effect on the position of the loaded Pt atom and its hydrogen adsorption and storage properties.
COMPUTATIONAL AND THEORETICAL CHEMISTRY
(2024)