Article
Chemistry, Physical
Sofia Babanova, Carlo Santoro, Jason Jones, Tony Phan, Alexey Serov, Plamen Atanassov, Orianna Bretschger
Summary: In this study, PGM-free catalysts were incorporated into the MFC system for treating swine wastewater, resulting in significantly improved cathode activity and overall power output. The addition of Fe-AAPyr derived catalyst demonstrated stability, durability, and reliability in real environmental conditions. The fluctuation in power output throughout the experiment was attributed to varying environmental conditions in natural settings.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Jing Zhang, Pan Xu, Zhiyu Mao, Xuehui Gao, Emil Marquez, Ja-Yeon Choi, Zhongwei Chen
Summary: This paper highlights the importance of platinum as well as platinum group metal free catalyst in Proton Exchange Membrane Fuel Cells (PEMFC) and the increasing demand for such catalysts. The authors successfully synthesized highly active materials with secondary nitrogen doping and scaled up the synthesis process, achieving high power density.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Marc Ziemba, Christian Hess
Summary: Through the use of operando Raman and UV-vis spectroscopy, as well as transient IR spectroscopy, the redox behavior and the significance of adsorbates for the reverse water-gas shift (rWGS) reaction of low-loaded Cu/CeO2(111) catalysts were investigated. The results demonstrate that the redox mechanism is more predominant than the associative mechanism.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Lei Du, Venkateshkumar Prabhakaran, Xiaohong Xie, Sehkyu Park, Yong Wang, Yuyan Shao
Summary: Fuel cells are gaining popularity as a clean energy technology, but challenges in cost reduction and integration of low-PGM catalysts remain significant barriers to their development.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Horie Adabi, Abolfazl Shakouri, Andrea Zitolo, Tristan Asset, Anastassiya Khan, Jasmine Bohannon, Raphael Chattot, Christopher Williams, Frederic Jaouen, John R. Regalbuto, William E. Mustain
Summary: To reduce PGM loading in AEMFCs, low-PGM Pt and PtRu catalysts were prepared using a new CST method, which allows for a high density of small multi atom clusters. The catalysts were characterized and tested for their activity both ex-situ and in operating AEMFCs. The PGM loading was reduced by 14 times while achieving comparable performance to commercial catalysts. AEMFCs with ultralow PGM loading (0.05 mg(PGM) cm(-2)) achieved a specific power of 25 W/mg(PGM) (40 W/mg(Pt)) by using PtRu anodes paired with Fe-N-C cathodes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Gabriela Grzybek, Magdalena Rudzinska, Kinga Gora-Marek, Pawel Stelmachowski, Grzegorz Slowik, Andrzej Kotarba
Summary: Research efforts to develop an effective soot oxidation catalyst have increased due to the awareness of the harmful effect of soot particles. This study optimized the potassium loading in the ferrierites to develop a cheap and environmentally friendly catalyst. It was found that potassium doping enhanced the catalyst's activity, while the effect of nitric oxide depended on the presence of potassium and the formation of nitrate species on the catalyst's surface.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Yixiao Wang, Jorrit Postuma de Boer, Michiel Makkee
Summary: The study investigates the application of Rh/CLZ catalyst in reducing N2O from industrial exhaust streams, revealing that hydrocarbon pretreatment enhances catalyst activity and explaining the reaction mechanism. The results demonstrate a unique N2O abatement performance in the presence of competing oxidants.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Williane da Silva Freitas, Pedro Pablo Machado Pico, Alessandra D'Epifanio, Barbara Mecheri
Summary: The study developed a highly efficient Fe-N-C bifunctional catalyst for oxygen reduction reaction and hydrogen evolution reaction, and its catalytic performance was studied in alkaline environment through cyclic voltammetry, rotating ring disk electrode experiments, and electrochemical impedance spectroscopy. Fe-N-C showed competitive performance in ORR and HER, demonstrating its activity as a bifunctional catalyst in energy conversion and storage devices.
Article
Chemistry, Physical
Yi Cheng, Mengen Wang, Shanfu Lu, Chongjian Tang, Xing Wu, Jean-Pierre Veder, Bernt Johannessen, Lars Thomsen, Jin Zhang, Shi-ze Yang, Shuangyin Wang, San Ping Jiang
Summary: The study developed atomically dispersed bimetallic FeCu coordinated with nitrogen-doped carbon nanotubes (FeCu/N-CNTs) as Pt-free oxygen reduction reaction (ORR) electrocatalysts, which showed similar performance to Pt/C but with better stability and enhanced activity in the presence of phosphate. DFT calculations revealed that the phosphate promotion effect was due to stronger binding of phosphate on Cu sites, leading to lower activation energy barrier for O-2 cleavage. FeCu/N-CNTs were also found to have better ORR activity compared to Fe single atom catalysts coordinated with nitrogen-doped carbon nanotubes, Fe/N-CNTs. The results demonstrate the potential of FeCu/N-CNTs as true Pt-free, highly active and durable cathodes in high temperature polymer electrolyte fuel cells based on PA/PBI.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Multidisciplinary Sciences
Rui Sang, Yuya Hu, Rauf Razzaq, Guillaume Mollaert, Hanan Atia, Ursula Bentrup, Muhammad Sharif, Helfried Neumann, Henrik Junge, Ralf Jackstell, Bert U. W. Maes, Matthias Beller
Summary: Using CO2 as C1-feedstock for the chemical industry has attracted great attention. Here the authors develop a two-step cascade process to perform catalytic carbonylations of olefins, alkynes, and aryl halides using CO2 and H-2.
NATURE COMMUNICATIONS
(2022)
Article
Electrochemistry
C. Lo Vecchio, A. Serov, M. Dicome, B. Zulevi, A. S. Arico, V Baglio
Summary: In this study, a long-term durability investigation was conducted on a Platinum Group Metal-free cathodic electro-catalyst for direct methanol fuel cells. Results showed a significant performance decrease after 100 hours of operation, with potential causes including catalyst aggregation, reduction of carbon and nitrogen species, and Ruthenium migration leading to poisoning of the membrane and cathode catalyst.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Hao Wan, Alexander Bagger, Jan Rossmeisl
Summary: This study investigates the selectivity and activity of diporphyrin catalysts in electrocatalytic nitrogen reduction reaction (NRR) using density functional theory simulations. The results demonstrate that diporphyrins can selectively synthesize NH3 without producing H2 gas under ambient conditions. This is achieved through chelating adsorption of N2 between two metal atoms, enhancing the binding of N2 and promoting N2 reduction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Bin Chi, Longhai Zhang, Xiaoxuan Yang, Yachao Zeng, Yijie Deng, Mingrui Liu, Junlang Huo, Chaozhong Li, Xiaorong Zhang, Xiudong Shi, Yijia Shao, Lin Gu, Lirong Zheng, Zhiming Cui, Shijun Liao, Gang Wu
Summary: This study reports the co-doping of Zr and Fe dual metal sites into a ZIF-8-derived mesoporous carbon for improved durability and activity in the oxygen reduction reaction. The Zr-doped Fe-N-C catalyst showed only 25% voltage loss after 20 hours of continuous operation and retained 40% of its initial performance after 100 hours, outperforming the catalyst without Zr doping. The cathode also exhibited significantly enhanced ORR activity, achieving a maximum power density of 0.72 W cm-2.
Article
Chemistry, Physical
Xiaohui Zhang, Qingqing Gu, Yanfu Ma, Qiaoqiao Guan, Rui Jin, Hengwei Wang, Bing Yang, Junling Lu
Summary: Pd nanoparticles supported on oxygen-functionalized carbon black exhibit an unexpected inverse trend of selectivity compared to those on carbon black. The balance of positive Pd delta+ species strongly modulates the competitive adsorption of different groups on the substrate, affecting the chemoselectivity of the catalytic reaction.
JOURNAL OF CATALYSIS
(2021)
Review
Chemistry, Physical
Shuang Cao, Tong Sun, Jin-Rong Li, Qin-Zhu Li, Chun-Chao Hou, Qi Sun
Summary: This review highlights the recent development of ORR catalysts in proton exchange membrane fuel cells (PEMFCs) and emphasizes the importance of designing efficient catalysts at the membrane electrode assembly (MEA) and full-cell levels.
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)