Article
Chemistry, Physical
Kirti Mishra, Nishu Devi, Samarjeet Singh Siwal, Vijay Kumar Thakur
Summary: The article discusses the role of electrode catalysts in fuel cells and the research progress on the use of metal/polymer-based nanomaterials with different morphologies and fabrication methods as anode catalysts. It also explores the application of noble and non-noble metal catalysts in fuel cell technology and the relationship between catalyst morphology, synthesis, and composition.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2023)
Article
Chemistry, Physical
Shaoqin Peng, Zhengxing Shi, Qiyue Fu, Wanqi Zeng, Yuexiang Li
Summary: The MoP catalysts synthesized by a solid reaction showed high activity and stability for H2 evolution in alkaline HCHO solution. The MoP-400 exhibited the highest activity at a calcination temperature of 400 degrees C.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Chongfu Wu, Changsheng Chen, Zhaoyang Qi, Jie Chen, Qinglian Wang, Changshen Ye, Ting Qiu
Summary: The ultra-deep desulfurization of oil is an urgent task due to various problems such as environmental pollution and environmental protection requirements. Oxidative desulfurization (ODS) is considered the most promising technology, but the synthesis of highly efficient and stable HPW-based heterogeneous catalysts remains challenging. In this paper, a simple one-step method was used to prepare a PEHA-HPW heterogeneous catalyst for ultra-deep desulfurization of fuel oil. The composite material showed excellent catalytic activity and high recyclability.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Damin Zhang, Jia Du, Jonathan Quinson, Matthias Arenz
Summary: Research on the electrocatalytic oxidation of small organic compounds aims at their application in direct methanol or formic acid fuel cells as alternatives to hydrogen-fueled fuel cells. Fundamental research involves screening catalyst materials and investigating reaction mechanisms. A gas diffusion electrode setup developed for studying oxygen reduction and water splitting has been demonstrated to be suitable for evaluating catalysts for the electro-oxidation of small organic molecules under conditions simulating low temperature proton exchange membrane fuel cells.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Inorganic & Nuclear
Lielie Liu, Shuyue Xie, Ruxangul Jamal, Tursun Abdiryim, Abdukeyum Abdurexit, Dongna Zou, Haile Liu, Yanyan Song
Summary: In this study, a facile method was used to prepare RuCoOx/N-CNT catalyst composited with PEDOT-SH and supported Pt nanoparticles (Pt NPs) for methanol oxidation reaction (MOR). The introduction of RuOx into CoOx in RuCoOx/N-CNT can generate a large number of oxygen vacancies, which serve as highly active centers and improve the hydrophilicity of catalysts, promoting the redox reaction kinetics. The structural characterizations confirm the presence of alloying and charge redistribution in RuCoOx/N-CNT@PEDOT-MeSH/Pt, and the oxygen vacancies effectively change the electronic structure and increase the density of active sites, enhancing MOR activity. Performance tests show that RuCoOx/N-CNT@PEDOTMeSH/Pt exhibits superior electrocatalytic activity (2003.3 mA mg-1Pt) compared to RuCoOx/N-CNT/Pt (1324.8 mA mg-1Pt) and commercial Pt/C (279.6 mA mg-1Pt) catalysts. This strategy provides a scheme for designing high-performance, low-cost anode catalysts in MOR.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Review
Chemistry, Physical
Shaoqi Chu, Enlai Wang, Fushan Feng, Changsheng Zhang, Jie Jiang, Qinqin Zhang, Fang Wang, Liancheng Bing, Guangjian Wang, Dezhi Han
Summary: Volatile organic compounds (VOCs) are important precursors for secondary pollutants, causing severe environmental problems. Catalytic oxidation is a safe and eco-friendly method to convert VOCs into CO2 and H2O. Noble metal catalysts, with high reaction activity, stability, poisoning resistance, and easy regeneration, have been widely studied for VOCs removal.
Article
Environmental Sciences
S. M. Sathe, Indrajit Chakraborty, Manikanta M. Doki, B. K. Dubey, M. M. Ghangrekar
Summary: The waste-iron catalyst derived from spent tonner ink was used for the cathodic degradation of surfactants in wastewater treatment. The study investigated the effect of catalyst application, contact time, external resistance, and anodic substrate concentration on the degradation efficiency. The long-term operation using real wastewater showed that the catalyst remained active and maintained the effluent surfactant concentration below the standard limit.
ENVIRONMENTAL RESEARCH
(2022)
Article
Energy & Fuels
Lignesh Durai, Arthi Gopalakrishnan, Sushmee Badhulika
Summary: This study presents a one-step hydrothermal synthesis of NiCoZn ternary mixed-metal-oxide nanorod-modified glassy carbon electrode for direct methanol fuel cell application, showing outstanding electro-oxidation activity of methanol with high durability.
Article
Chemistry, Analytical
Ayan Mukherjee, Wei-Nien Su, Chun-Jern Pan, Suddhasatwa Basu
Summary: A facile one pot synthesis route was adopted to prepare Pd@CuO/C core-shell nanostructure for ethylene glycol oxidation. The nanostructure exhibited enhanced electro-catalytic performance, lower Tafel slope and charge transfer resistance compared to Pd/C, attributed to the modification of the electronic structure of Pd and CuO due to the formation of core-shell structure.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Dao-Jun Guo, Shu-Kun Cui
Summary: High-performance Pt-WO3/MWCNTao catalysts for methanol electro-oxidation were successfully synthesized in this study, with significantly improved mass activity and a lower CO oxidized potential. The combination of high hydrophilic MWCNTs and the synergistic effect of WO3 were proposed to contribute to the superior performance, making the nano-composites a powerful strategy for obtaining anodic catalysts with super activity in direct methanol fuel cells.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Energy & Fuels
Sara Sheikhi, Fahimeh Jalali
Summary: The Zr-MOF@PANI-Ni-NPs composite showed excellent electrocatalytic performance towards methanol oxidation reaction, with significantly improved electrochemistry of nickel observed on the electrode surface. Compared to stepwise-modified electrodes, the oxidation current of methanol was highly increased on Zr-MOF@PANI-Ni-NPs/GCE in alkaline solution.
Article
Chemistry, Applied
Zhipeng Yu, Junyuan Xu, Isilda Amorim, Yue Li, Lifeng Liu
Summary: A simple phosphorization treatment can greatly enhance the electrocatalytic performance of palladium-nickel catalysts in direct liquid fuel cells and water electrolyzers, showing substantial promise for large-scale applications.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Physical
Xinxin Lin, Peng Peng, Jianing Guo, Lianhua Xie, Yujia Liu, Zhonghua Xiang
Summary: The study developed a novel steric tetra-imidazole structure to anchor iron in a cross way, enabling the one-step synthesis of atomically dispersed FeN4 rich carbon-based electrocatalysts without the need for pretreatment and acid leaching. This new structure effectively controls the distance between metal rivet centers and inhibits iron aggregation, resulting in high atomic iron loading content and efficient electrocatalytic performance for the oxygen reduction reaction.
Article
Chemistry, Physical
Yufei Bao, Ligang Feng
Summary: Direct formic acid fuel cells involve significant half-reactions of formic acid electro-oxidation and oxygen reduction reaction. The use of PdNi alloy on 3D graphene aerogel (PdNi/GA) as catalyst demonstrated enhanced formic acid oxidation ability. This catalyst showed superior catalytic performance compared to traditional Pd/GA and Pd/C catalysts, indicating its potential for application in fuel cells.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Green & Sustainable Science & Technology
V. B. Kumar, D. Kashyap, H. Teller, M. G. Gebru, A. Gedanken, A. Schechter
Summary: This study investigates the electro-oxidation of methyl formate (MF) and dimethyl ether (DME) on a ternary catalyst supported on CNT-NCDs, showing high catalytic activity and stability. The ternary catalyst exhibited peak oxidation currents of 75 mA/mg for DME and 365 mA/mg for MF, with significant improvements over other catalysts tested.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Multidisciplinary Sciences
Shibarata Basak, Junbeom Park, Janghyun Jo, Osmane Camara, Amir H. Tavabi, Hermann Tempel, Hans Kungl, Chandramohan George, Rafal E. Dunin-Borkowski, Joachim Mayer, Ruediger-A Elchel
Summary: With the increase in the use of Li-ion batteries, safety has become a major concern, particularly in electric vehicles. In response, all-solid-state batteries (ASSBs) that use solid electrolytes are being extensively researched due to their reduced flammability risk. However, the challenge lies in ion transportation through the solid-solid electrolyte-electrode interface, which requires suitable coatings to enhance performance and stability.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2023)
Article
Materials Science, Multidisciplinary
Marc Heggen, Michael Feuerbacher, Rafal E. Dunin-Borkowski
Summary: Metadislocations, novel defects in complex metallic alloys, have been observed on the atomic scale in the T-Al-Mn-Fe phase using in-situ high-resolution transmission electron microscopy. Their motion is characterized by discrete jumps between low-energy configurations and a mixed glide/climb process.
MATERIALS RESEARCH LETTERS
(2023)
Article
Microscopy
Giovanni Bertoni, Enzo Rotunno, Daan Marsmans, Peter Tiemeijer, Amir H. Tavabi, Rafal E. Dunin-Borkowski, Vincenzo Grillo
Summary: The key to optimizing the spatial resolution of a scanning transmission electron microscope lies in accurately measuring and correcting electron optical aberrations. While several diagnostic methods have been proposed, they often involve long acquisition times. In this study, we demonstrate how artificial intelligence can quickly diagnose aberrations from individual Ronchigrams, which is crucial for rapidly changing microscope conditions and the operation of MEMS-based hardware correction elements.
Article
Multidisciplinary Sciences
S. Reimers, Y. Lytvynenko, Y. R. Niu, E. Golias, B. Sarpi, L. S. I. Veiga, T. Denneulin, A. Kovacs, R. E. Dunin-Borkowski, J. Blaesser, M. Klaeui, M. Jourdan
Summary: Researchers demonstrate complete and reversible current induced switching of the Neel vector in Mn2Au, a metallic antiferromagnet, which holds promise for antiferromagnet memories. This switching is achieved with low heating and provides a long-term stable domain pattern suitable for memory applications.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Kun Zhang, Qiang Guo, Yehong Wang, Pengfei Cao, Jian Zhang, Marc Heggen, Joachim Mayer, Rafal E. Dunin-Borkowski, Feng Wang
Summary: In this work, selective ethylene carbonylation to 3-pentanone was achieved using in situ produced hydrogen via a water-gas shift (WGS) reaction on a defective ceria-supported Rh catalyst. The interface of Rh/CeO2 activates water, CO, and ethylene, facilitating the WGS reaction and ethylene carbonylation. A redox pathway for the WGS reaction was proposed based on in situ FTIR results, and water was confirmed as the hydrogen source for ethylene carbonylation through mass spectrometry (MS) study.
Article
Materials Science, Multidisciplinary
Lars Freter, Hung -Chang Hsu, Raman Sankar, Chun -Wei Chen, Rafal E. Dunin-Borkowski, Philipp Ebert, Ya-Ping Chiu, Michael Schnedler
Summary: We observed a hysteresis in tunneling spectra of cleaved MA-Br terminated (001) surfaces of MAPbBr(3) single crystals at 4.3 K. Simulations of the tunneling spectra revealed an underlying polarization-voltage hysteresis, which resulted from the rotation and alignment of MA molecules induced by subsurface fields and stabilized by dipole-dipole interactions, as well as the ion-lattice relaxation. The compensating surface polarization was detected by surface-sensitive tunneling spectroscopy.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Physical
Katherine E. MacArthur, Shlomi Polani, Malte Klingenhof, Nina Gumbiowski, Tim Moller, Paul Paciok, Jiaqi Kang, Matthias Epple, Shibabrata Basak, Ruediger-A. Eichel, Peter Strasser, Rafal E. Dunin-Borkowski, Marc Heggen
Summary: This study provides a detailed characterization of the morphological and compositional changes of octahedral-shaped PtNi catalysts and doped octahedral PtNi-(Mo) and PtNi-(MoRh) catalysts during thermal annealing. The results show that the octahedral shape of PtNi catalysts gradually changes and undergoes alloying upon heating. However, doping with Mo or Mo/Rh stabilizes the structure and maintains a truncated octahedral shape during heat treatments.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
D. S. Rosenzweig, M. Schnedler, R. E. Dunin-Borkowski, Ph. Ebert, H. Eisele
Summary: Hydrogen exposure and annealing at 400 degrees C cause layer-by-layer etching of n-doped GaAs(110) surface, leading to the formation of step edge sections with [001] normal vector. It also results in the formation of negatively charged point defects, causing Fermi level pinning in the lower part of the bandgap. The desorption of adatoms is primarily attributed to hydrogen bonding and subsequent Ga-H desorption, while the electronic properties of the initially grown nanowires cannot be revealed from the hydrogen-cleaned surface.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2023)
Article
Chemistry, Multidisciplinary
Yue Zhang, J. Paul van Schayck, Adriain Pedrazo-Tardajos, Nathalie Claes, Willem E. M. Noteborn, Peng-Han Lu, Hans Duimel, Rafal E. Dunin-Borkowski, Sara Bals, Peter J. Peters, Raimond B. G. Ravelli
Summary: Cryogenic electron microscopy can produce high-resolution reconstructions of macromolecules in ice, but the electron beam can cause motion and distortion. Sample charging is a contributing factor, which can be alleviated by using a conductive film. In this study, a layer of graphene was used to mitigate sample charging, resulting in high-resolution reconstructions and reduced particle movement. This approach may have broad implications for various electron microscopy techniques and the study of radiation damage.
Article
Chemistry, Multidisciplinary
Sachin Krishnia, Yanis Sassi, Fernando Ajejas, Nicolas Sebe, Nicolas Reyren, Sophie Collin, Thibaud Denneulin, Andras Kovacs, Rafal E. Dunin-Borkowski, Albert Fert, Jean-Marie George, Vincent Cros, Henri Jaffres
Summary: By inserting a nanometer-thin Al metallic layer in Pt|Co|Al|Pt, we demonstrate that a light metal interface profoundly affects the nature of spin-orbit torques and its efficiency in ultrathin Co films. The unexpectedly large H(FL)/H(DL) ratios suggest the existence of a large Rashba interaction at the Co|Al interface, which is not expected from a metallic interface. The occurrence of enhanced torques from an interfacial origin is further validated by demonstrating current-induced magnetization reversal with a significant decrease in the critical current.
Article
Nanoscience & Nanotechnology
Tumesh Kumar Sahu, Nishant Kumar, Sumit Chahal, Rajkumar Jana, Sumana Paul, Moumita Mukherjee, Amir H. Tavabi, Ayan Datta, Rafal E. Dunin-Borkowski, Ilia Valov, Alpana Nayak, Prashant Kumar
Summary: Researchers have discovered a new two-dimensional material called molybdenene, which has metallic character and can be hybridized with other materials to exhibit tunable optical and electronic properties. The study also demonstrates the applications of molybdenene in molecular sensing, electron imaging, and scanning probe microscopy.
NATURE NANOTECHNOLOGY
(2023)
Article
Microscopy
David Landers, Ian Clancy, Rafal E. Dunin-Borkowski, Dieter Weber, Andrew Stewart
Summary: This paper introduces the free and open-source software TEMGYM Advanced, which calculates the electron beam trajectory in an electron microscope using ray tracing methods. It validates the accuracy of aberration coefficient calculations and demonstrates parallelised electron ray tracing through magnetic components. TEMGYM Advanced is a valuable resource for the electron microscopy community and complements the growing ecosystem of free and open-source software in this field.
Article
Multidisciplinary Sciences
Klaus M. Seemann, Andras Kovacs, Thomas E. Schmid, Katarina Ilicic, Gabriele Multhoff, Rafal E. Dunin-Borkowski, Caterina Michelagnoli, Natalia Cieplicka-Orynzak, Soumen Jana, Giacomo Colombi, Michael Jentschel, Claus M. Schneider, Bernd Kuhn
Summary: These functionalized magnetic nanoparticles show great potential for cancer treatment due to their advantageous features such as superparamagnetic and ferromagnetic properties, radiation emission, and optical visualization.
Article
Chemistry, Physical
Kun Zhang, Qiang Guo, Yehong Wang, Pengfei Cao, Jian Zhang, Marc Heggen, Joachim Mayer, Rafal E. Dunin-Borkowski, Feng Wang
Summary: In this study, selective ethylene carbonylation to 3-pentanone was achieved using in situ produced hydrogen via a water-gas shift reaction. The interface of Rh/CeO2 activates water, CO, and ethylene and promotes subsequent reactions, including the water-gas shift reaction and ethylene carbonylation. The hydrogen generated from the water-gas shift reaction suppresses hydrogenation and promotes ethylation.
Article
Physics, Applied
Shengbo You, Peng-Han Lu, Thomas Schachinger, Andras Kovacs, Rafal E. Dunin-Borkowski, Andrew M. Maiden
Summary: Electron ptychography has the ability to recover high contrast and ultra-high resolution images. It can also quantitatively map phase variations resulting from magnetic and electric fields over extended fields of view.
APPLIED PHYSICS LETTERS
(2023)
