Article
Materials Science, Multidisciplinary
Babalola Aisosa Oni, Olusegun Stanley Tomomewo, Samuel Eshorame Sanni, Victor Oyebamiji Ojo
Summary: Co has an impact on the stability and activity of the Co-La1_xCaxNiO3-ZrO2 catalyst under methane dry reforming conditions. The catalytic performance of the Co-based bimetallic catalyst was evaluated during the reduction reactions of perovskite precursors. Various characterization techniques were used to study the metal-metal/metal-support interactions and phase changes that occurred under the reaction conditions. The 2%Co-La0.2Ca0.8NiO3-ZrO2 catalyst showed the highest activity and demonstrated excellent stability, with high CO2 and CH4 conversions of 90% and 88% respectively, attributed to the synergistic interaction between Ni and Co in the catalyst's lattice.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Robert Cherbanski, Tomasz Kotkowski, Eugeniusz Molga
Summary: Nickel-based catalysts used in the dry reforming of methane (DRM) face issues of coking and sintering, which limit their industrial application. The addition of an anti-coking additive (CaO) to a commercial nickel catalyst was investigated using thermogravimetric analysis. It was observed that the catalyst sintered at temperatures between 850 and 900 degrees C, leading to permanent deactivation. The coking and carbon gasification rates were found to be equal at temperatures of 796-860 degrees C for the tested Ni/CaO-Al2O3 catalyst, depending on the heating rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Zhengpeng Chen, Mingfei Li, Xiuyang Qian, Jiangbo Dong, Kai Xiong, Di Gan, Mumin Rao, Chuangting Chen, Yunfeng Tian, Yihan Ling
Summary: This study proposes a novel approach to address the carbon deposition issue in direct CH4-CO2 solid oxide fuel cells (SOFC) by using a Li-doped perovskite as an exsolution system and a dry reforming catalyst. The results show that this approach effectively reduces carbon deposition and improves the electrochemical performance of fuel cells.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Inorganic & Nuclear
Lianwei Wei, Jiaping Hu, Huimin Liu, Wanqun Zhang, Hui Zheng, Shusheng Wu, Kaibin Tang
Summary: This study presents the application of Sr-6(Co0.8Fe0.2)(5)O-15 (SCF-H) perovskite oxide as an electrocatalyst for the oxygen evolution reaction (OER) in alkaline media. SCF-H exhibits remarkable OER activity with abundant surface oxygen species, faster charge transfer rate, and higher electrochemical surface area, making it a promising OER electrocatalyst.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Tingting Yan, Xinya Liu, Xinyu Zhang, Enliu Hong, Limin Wu, Xiaosheng Fang
Summary: An inorganic-organic heterojunction is designed to effectively fill up the pinholes in the nanosheet film, resulting in a 100,000 times suppression of the device's dark current. Moreover, the inorganic-organic heterojunction improves the transport speed of charge carriers and response time, and provides excellent self-powered performance for the device. This photodetector shows potential applications in a UV communication system.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
So Yeon Park, Se Jin Kim, Jun Hyeok Lee, Min Ju Jeong, Jae Myeong Lee, Hyun Suk Jung, Jun Hong Noh
Summary: In this study, a method was developed to deposit p-type oxide as hole transport material over the perovskite layer in halide perovskite solar cells without damaging the perovskite layer. By using appropriate solvents, NiO nanoparticles were successfully dispersed to form a compact and uniform layer, resulting in record power conversion efficiency and excellent thermal stability for HPSCs.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jia-Wei Zhao, Hong Zhang, Cheng-Fei Li, Xia Zhou, Jin-Qi Wu, Feng Zeng, Jiangwei Zhang, Gao-Ren Li
Summary: This study demonstrates the key roles of surface Fe doping and Sr dynamic dissolution in achieving efficient lattice oxygen oxidation reaction (LOER) on perovskite catalysts. The design and fabrication of La/Sr-based perovskite catalysts with surface Fe sites and Sr vacancies enable superior LOER performance compared to the RuO2/C catalyst.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yu Li, Zedong Lin, Jian Wang, Rongguo Xu, Kai Zhang, Gaopeng Wang, Tongfa Liu, Huanping Zhou, Shuang Xiao, Shihe Yang
Summary: The vapor healing strategy allows for simultaneous filling of vacancies, passivation of defects, and improvement of performance in perovskite films. It reduces trap density and non-radiative recombination, leading to higher conversion efficiency and stability of the devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Chao Sun, Katarzyna Swirk Da Costa, Dominik Wierzbicki, Monika Motak, Teresa Grzybek, Patrick Da Costa
Summary: Ni-containing mixed oxides derived from layered double hydroxides with various amounts of yttrium exhibited excellent catalytic activity, especially in the moderate temperature region. Modification with different amounts of yttrium had a positive effect on the catalytic performance and CO2 conversion rate, leading to mixed oxides with stronger affinity and smaller crystallite size.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Tina Rocnik Kozmelj, Matej Zula, Janvit Terzan, Blaz Likozar, Uros Maver, Laura Cinc Curicc, Edita Jasiukaityte-Grojzdeka, Miha Grilc
Summary: The mechanisms, activity, and selectivity of the acid-supported transition metal rate catalyst (NiMo/Al2O3) for the hydrogenation, hydrodeoxygenation (HDO), and defunctionalization of lignin model compounds were investigated. The commercially available NiMo/Al2O3 intermediates showed strong acidity, which did not promote complete bond saturation but instead favored the formation of higher molecular weight compositions. The study provides insights for understanding and optimizing efficient valorization processes.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Vladimir Paunovic, Vitaly Sushkevich, Przemyslaw Rzepka, Luca Artiglia, Roland Hauert, Sung Sik Lee, Jeroen A. van Bokhoven
Summary: This study investigates the potential of regenerating catalysts by reacting coke deposits with hydrogen. The reactivation efficiency is enhanced under high pressure, and hydrogen treatment can remove coke and restore catalyst activity in various Si/Al ratios.
JOURNAL OF CATALYSIS
(2022)
Article
Green & Sustainable Science & Technology
Naushad Ahmad, Rizwan Wahab, Salim Manoharadas, Basel F. Alrayes, Fahad Alharthi
Summary: The article investigates BaNiO3 perovskite for syngas production, finding that its reduced form shows high stability and resistance to carbon deposition in the DRM reaction. Various techniques were used to analyze its physical properties and structural changes after use.
Article
Chemistry, Multidisciplinary
Yuxiao Zhu, Wei Zhou, Zichao Dong, Xinxin Zhang, Zhipeng Chen, Ziyong Liu, Fuli Li, Jingxin Fan, Licheng Liu, Mingyang Jiao
Summary: In this study, nanosized LaInO3 perovskite catalyst was synthesized and applied to CO2 electrocatalytic reduction reaction (CO2RR), showing excellent activity for formate production. The highest faradaic efficiency of formate reaches 91.4% and the partial current density of formate is 106.8 mA cm(-2) at a moderate overpotential of 0.9 V. Experimental research and DFT calculations indicate that the outstanding activity of LaInO3 is mainly attributed to its intensive adsorption stability to free radical intermediates (CO2 center dot-) and lower desorption free energy of formate products during reaction.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Physical
Hongjian Luo, Yan Li, Tao Li, Zhijin Wang, Linhai Wang, Yun-Quan Liu
Summary: Double perovskite type catalysts with the formula of La2CoxFe2-xO5+d (x = 1.5, 1 and 0.5) were synthesized via a modified sol-gel method, and showed improved anti-coking and sulfur-resisting performance for steam reforming of n-hexadecane. Characterizations revealed that the special structure of double perovskite minimized coke formation and improved sulfur resisting, due to the generation of oxygen vacancies. The molar ratio of Co to Fe also had an effect on catalyst activity, and the catalyst LCF-2 (for x = 1) with a porous structure exhibited the best catalytic activity and stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Pradeep Kumar Yadav, Taraknath Das, Prasenjit Mondal
Summary: A series of supported perovskite-type catalysts were synthesized, with the addition of ceria improving the surface area of the catalyst. The modified-supported catalysts showed improved performance in the DRM reaction, with nickel-aluminate and nickel-magnesia solid solutions observed. The most effective catalyst identified was 40LaNi0.75Ce0.05Zr0.20O3/8MgO-SiO2.
Article
Chemistry, Multidisciplinary
Ilia I. Sadykov, Vitaly L. Sushkevich, Frank Krumeich, Rob Jeremiah G. Nuguid, Jeroen A. van Bokhoven, Maarten Nachtegaal, Olga V. Safonova
Summary: Operando X-ray absorption spectroscopy identifies a quantitative correlation between the concentration of Fe2+ species in Pt-FeOx catalysts and their carbon monoxide oxidation steady-state reaction rate. Deactivation of the catalysts occurs due to irreversible oxidation of active Fe2+ sites. Active Fe2+ species, presumed to be Fe+2O-2 clusters in contact with platinum nanoparticles, coexist with spectator trivalent oxidic iron (Fe3+) and partially alloyed metallic iron (Fe-0). The concentration of active sites and catalyst activity strongly depend on the pretreatment conditions. Fe2+ is the resting state of the active sites in the carbon monoxide oxidation cycle.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Christopher Hunston, David Baudouin, Leo Koning, Ayush Agarwal, Oliver Kroecher, Frederic Vogel
Summary: The performance of Ru catalysts with different sizes of Ru nanoparticles (NP) in continuous supercritical water gasification (SCWG) of glycerol was evaluated. It was demonstrated that Ru NPs smaller than 1.2 nm had high initial turnover frequencies (TOF). Deactivation of the catalysts was mainly caused by coking and sintering. A correlation between TOF and the density of surface Ru atoms was found, and an optimal surface density resulted in high initial and steady-state TOFs, prolonging the lifetime by delaying coke formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
M. Roger, O. Kroecher, D. Ferri
Summary: This study investigates the effects of O2 pulsing on the activity of Pd/Al2O3 catalyst through experiments and calculations, and reveals some regularities. It is necessary to accurately evaluate the concentration and conversion of NO in order to calculate the concentration of O2 in the reaction feed accurately.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Energy & Fuels
Jian Chen, Lunbo Duan, Yuxin Ma, Yuxin Jiang, Anqi Huang, Hongyu Zhu, Hongyu Jiao, Mingdi Li, Yanbin Hu, Hui Zhou, Yongqing Xu, Felix Donat, Muhammad Awais Naeem, Oliver Krocher
Summary: CaL-CLC is an efficient and cost-effective CO2 capture technology that uses the heat generated by chemical looping combustion. Many studies have been carried out on the CaL-CLC process, and it is important to summarize recent progress and provide future research directions.
Article
Chemistry, Medicinal
Mirko Paulikat, Daniele Vitone, Florian K. Schackert, Nils Schuth, Alessandra Barbanente, GiovanniMaria Piccini, Emiliano Ippoliti, Giulia Rossetti, Adam H. Clark, Maarten Nachtegaal, Michael Haumann, Holger Dau, Paolo Carloni, Silvano Geremia, Rita De Zorzi, Liliana Quintanar, Fabio Arnesano
Summary: This study elucidated the structural determinants of zinc-chloroquine interactions and zinc distribution in cells using computational and experimental methods. Chloroquine binds zinc through the quinoline ring nitrogen, forming tetrahedral complexes, but loses metal coordination at low pH. The findings have implications for other metal-targeting drugs and bioinorganic systems.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2023)
Correction
Chemistry, Applied
Martin Elsener, Eberhard Jacob, Davide Ferri, Oliver Krocher
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Anna Zabilska, Maxim Zabilskiy, Rob Jeremiah G. Nuguid, Adam H. H. Clark, Ilia I. I. Sadykov, Maarten Nachtegaal, Oliver Kroecher, Olga V. V. Safonova
Summary: In this study, the origin of the volcano-shaped activity trend for VOx/CeOx catalysts in ethanol oxidative dehydrogenation (ODH) was clarified using operando quick V K- and Ce L-3- edge XAS experiments. It was found that both vanadium and cerium synergistically contribute to the alcohol ODH activity, with the concentration of reversible Ce4+/Ce3+ species being the main descriptor. The activity drop observed at a surface loading above ca. 3 V nm(-2) (ca. 30% VOx monolayer coverage) was attributed to the formation of spectator V4+ and Ce3+ species, which were identified for the first time.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Xi Zhang, Stephan Pollitt, Gihun Jung, Wenzhe Niu, Pardis Adams, Jan Buhler, Nora S. Grundmann, Rolf Erni, Maarten Nachtegaal, Neul Ha, Jisu Jung, Byungha Shin, Wooseok Yang, S. David Tilley
Summary: This work addresses the issue of short minority carrier diffusion length in Cu2S by synthesizing nanostructured Cu2S thin films, which enables increased charge carrier collection. The photocathode based on the nanoplate Cu2S reveals enhanced charge carrier collection and improved photoelectrochemical water-splitting performance. This work provides a simple, cost-effective, and high-throughput method to prepare phase-pure nanostructured Cu2S thin films for scalable solar hydrogen production.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jing Gao, Alimohammad Bahmanpour, Oliver Krocher, Shaik M. Zakeeruddin, Dan Ren, Michael Gratzel
Summary: The electrochemical reduction of carbon dioxide to propylene on copper nanocrystals is a promising method for addressing climate concerns. The production rate of propylene is affected by the presence of carbon monoxide, indicating the importance of the coupling between carbon dioxide and *C-2 intermediates. The study also found that the adsorption of key intermediates is favored on Cu(100) and Cu(111) facets of metallic copper nanocrystals.
Article
Chemistry, Physical
Thibault Fovanna, Maarten Nachtegaal, Adam H. Clark, Oliver Krocher, Davide Ferri
Summary: Using quick scanning X-ray absorption spectroscopy (QEXAFS), a detailed kinetic study of Pd hydride formation and reactivity on Pd/Al2O3 in 2-propanol solvent was conducted, allowing for quantitative assessment of the extent of Pd hydride formed or consumed. This methodology was further applied to study the displacement of hydrides during furfural hydrogenation in 2-propanol, revealing a displacement process occurring upon coordination of CO derived from furfural decarbonylation on palladium. The time-resolved quantitative methodology enables the determination of Pd hydride fraction and assessment of their displacement and consumption kinetics in both gas and liquid phases.
Article
Chemistry, Physical
Patrick Gaumann, Davide Ferri, Denis Sheptyakov, Jeroen A. van Bokhoven, Przemyslaw Rzepka, Marco Ranocchiari
Summary: Despite being identified as a common element and simulations predicting enhanced properties, experimental characterization of adsorbed phase in selective catalysis is scarce. This study presents experimental evidence of a 16(2)% increase in propene density within the channels of Zn-MOF-74 compared to the liquid phase. In situ neutron powder diffraction localizes ordered propene molecules adsorbed in MOF pores, supported by adsorption studies, causing efficient packing and increased olefin density.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Natasa Diklic, Adam H. H. Clark, Juan Herranz, Dino Aegerter, Justus S. S. Diercks, Alexandra Beard, Viktoriia A. A. Saveleva, Piyush Chauhan, Maarten Nachtegaal, Thomas Huthwelker, Dmitry Lebedev, Paula Kayser, Jose Antonio Alonso, Christophe Coperet, Thomas J. J. Schmidt
Summary: The large-scale deployment of polymer electrolyte water electrolysis (PEWE) is limited by the use of scarce and expensive iridium-based O-2 evolution reaction (OER) catalysts in PEWE anodes. To gain a better understanding of the relationship between the catalysts' activity and their physicochemical properties, the oxidation state of surface iridium in different iridium oxides with varying compositions, crystal structures, and OER activities was determined. The results showed that regardless of the catalysts' properties, the surface iridium underwent a linear, potential-driven oxidation that stabilized at a +5 state, which correlated with the onset of O-2 evolution, indicating the involvement of iridium in oxidation states ≥+5 in the OER.
Article
Chemistry, Physical
Matteo Signorile, Davide Salusso, Valentina Crocella, Maria Cristina Paganini, Silvia Bordiga, Francesca Bonino, Davide Ferri
Summary: This article investigates the reaction mechanism of dimethyl carbonate (DMC) production from CO2 and CH3OH over ZrO2 in the liquid phase. In situ ATR-IR spectroscopy was employed to study the formation of DMC. The results show that the activation of CO2 and CH3OH and the formation of reaction products strongly depend on the reaction temperature, with different reaction paths observed at different temperatures.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
M. Roger, L. Artiglia, A. Boucly, F. Buttignol, M. Agote-Aran, J. A. van Bokhoven, O. Krocher, D. Ferri
Summary: Ambient pressure X-ray photoelectron spectroscopy (APXPS) is used to characterise the surface structure of heterogeneous catalysts. By collecting consecutive APXPS spectra during the periodic perturbation of a catalyst, the time resolution and signal-to-noise ratio of photoemission spectra can be improved. Through phase sensitive analysis of the averaged time-resolved spectra, the formation/consumption dynamics of various species and their reactivity to gas switches can be studied with unprecedented precision.
Article
Chemistry, Physical
Thibault Fovanna, Maarten Nachtegaal, Adam H. Clark, Oliver Kroecher, Davide Ferri
Summary: By using quick scanning X-ray absorption spectroscopy (QEXAFS), the in situ formation and consumption of Pd hydrides in liquid environments were studied. The changes in the QEXAFS spectra were calibrated with temperature-programmed reduction (TPR), allowing for quantitative assessment of the extent of Pd hydride formed or consumed. This methodology was used to track the fate of hydrides during furfural hydrogenation in 2-propanol, revealing their displacement upon coordination of CO derived from furfural decarbonylation on palladium. The time-resolved quantitative methodology can be applied to determine the fraction of Pd hydrides and assess their displacement and consumption kinetics in both gas and liquid phases.