Article
Engineering, Chemical
Florian Maurer, Andreas Gaenzler, Patrick Lott, Benjamin Betz, Martin Votsmeier, Stephane Loridant, Philippe Vernoux, Vadim Murzin, Benjamin Bornmann, Ronald Frahm, Olaf Deutschmann, Maria Casapu, Jan-Dierk Grunwaldt
Summary: The study found that reductive pulse activation leads to an increase in overall catalyst activity and the generation of different particle size zones within the catalyst bed. Activation temperature and pulse length influence the noble metal particle size, and this activation method could potentially be applied to industrially relevant catalysts in the future.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Zena Savva, Klito C. Petallidou, Constantinos M. Damaskinos, George G. Olympiou, Vassilis N. Stathopoulos, Angelos M. Efstathiou
Summary: The study found that as the size of Pd particles increased, the rate of NO conversion per gram of Pd metal significantly increased, mainly due to the increase in active NOx concentration and the rate of H-spillover.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Multidisciplinary
Conor L. Rooney, Mason Lyons, Yueshen Wu, Gongfang Hu, Maoyu Wang, Chungseok Choi, Yuanzuo Gao, Chun-Wai Chang, Gary W. Brudvig, Zhenxing Feng, Hailiang Wang
Summary: This study investigates the CO2 reduction to methanol catalyzed by CoPc through in situ X-ray absorption spectroscopy characterization. CoPc dispersed on CNT surfaces enables fast electron transfer and multi-electron CO2 reduction. The labile CO intermediate on the active site requires a high local concentration to compete with CO2 and promote methanol production. The bridging aza-N atoms of the Pc macrocycle are critical components of the CoPc active site.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Hiroyuki Okazaki, Akira Idesaki, Hiroshi Koshikawa, Daiju Matsumura, Takashi Ikeda, Shunya Yamamoto, Tetsuya Yamaki
Summary: The change in the oxygen adsorption states of Pt nanoparticles by ion irradiation of the carbon support was studied using in situ X-ray absorption spectroscopy measurements. It was observed that ion irradiation caused a weakening of the Pt-O bond, potentially enhancing the oxygen reduction reaction activity of the Pt nanoparticles deposited on the carbon support.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Engineering, Multidisciplinary
Ismail Hakki Savci, M. Zafer Gul
Summary: This study investigates the urea spray behavior in the selective catalytic reduction (SCR) aftertreatment system of heavy-duty diesel engines through experimental and numerical analysis. A custom test rig is built to simulate the exhaust aftertreatment system of diesel vehicles, and the effects of droplet size and velocity distribution on flow characterization are discussed. A validated numerical model is used to study urea-flow mixing dynamics and develop a urea mixer. The results show that smaller droplets enhance mixing and catalyst efficiency.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Shuang Liu, Yan Huang, Shanshan Li, Qingjin Lin, Jianli Wang, Shaohua Xie, Fudong Liu, Haidi Xu, Yaoqiang Chen
Summary: A W/CZ catalyst with a pyrochlore structure was successfully developed, showing excellent NOx adsorption-storage ability below 180°C and superior NH3-SCR activity above 180°C. The pyrochlore structure increased oxygen vacancies and enhanced redox property, significantly promoting NOx adsorption-storage at low temperature and improving NH3-SCR performance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Chunmiao Jia, Jiajian Gao, Kuniadi Wandy Huang, Vishal Jose, Prapisala Thepsithar, Jong-Min Lee
Summary: CuO/γ-Al2O3 catalyst showed excellent catalytic activity in methanol-SCR process, efficiently removing NOx without deactivation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Huanhao Chen, Sarayute Chansai, Shaojun Xu, Shanshan Xu, Yibing Mu, Christopher Hardacre, Xiaolei Fan
Summary: The bimetallic Pt-Ni@CeO2 catalyst exhibited significantly enhanced performance in terms of activity, H2/CO ratio, and long-term stability compared to the monometallic Ni@CeO2 catalyst. In situ studies revealed that the Pt phase in the bimetallic catalyst played a crucial role in improving CO2 dissociation, reducing coke formation, and enhancing metal dispersion for CH4 decomposition.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Cheng Zhang, Constantinos M. Damaskinos, Michalis A. Vasiliades, Yuefeng Liu, Qian Jiang, Qiang Wang, Angelos M. Efstathiou
Summary: The performance of a highly dispersed Pt/Co1Mg2Al1Ox-LDO catalyst towards NOx adsorption and reduction by H2 was investigated. The influence of CO2 and H2O in the feeds, and the effects of catalyst pretreatment with SO2/He gas mixture on NOx dynamics were determined. The nature of active and inactive NOx species in H2 was probed by in-situ DRIFTS.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Applied
Luozhen Jiang, Xin Tao, Lina Li, Wen Xia, Rui Si
Summary: Pt/CeO2 catalyst prepared in this study showed enhanced activity for CO oxidation after hydrogen reduction. Different oxidation states of Pt were found to affect the catalytic activity, with Pt-O-4 identified as the optimal active species.
JOURNAL OF RARE EARTHS
(2021)
Article
Chemistry, Physical
Jiabin Xu, Kun Feng, Yufeng Chen, Jun Zhong
Summary: In this study, a CuxCo1-xPtyO/RGO catalyst composite was prepared for the hydrolysis of ammonia borane, exhibiting high catalytic activity. The metallic Pt in the catalyst was identified as the true catalytic center, while Co acted as an electron donor to form Co-Pt bonds. Cu contributed to the stability of the catalyst, and RGO as a support facilitated charge transfer and particle dispersion.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Viktoriia A. Saveleva, Kavita Kumar, Pascal Theis, Nicole Segura Salas, Ulrike I. Kramm, Frederic Jaouen, Frederic Maillard, Pieter Glatzel
Summary: This study investigates the structural composition of Fe-N-C materials for the oxygen reduction reaction in proton-exchange membrane fuel cells, before and after catalyst layer preparation, using X-ray absorption and emission spectroscopies. The results reveal the significant impact of the preparation step on the electronic structure and local coordination of Fe, emphasizing the importance of determining the Fe-N-C catalyst structure in the prepared electrode for further studies of the structure-activity-stability correlations.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Pankaj Kumar Singh, Keita Shinzato, Hiroyuki Gi, Takayuki Ichikawa, Hiroki Miyaoka
Summary: This study systematically investigates the catalytic properties of group 4-6 element oxides, including TiO2, ZrO2, HfO2, V2O5, Ta2O5, CrO3, MoO3, and WO3, on magnesium hydride (MgH2). The dispersion of each oxide on the MgH2 surface is achieved through ball-milling. The hydrogen desorption properties are analyzed, and the oxides on MgH2 are characterized structurally and spectroscopically. Among the oxides, TiO2, V2O5, ZrO2, and CrO3 exhibit higher catalytic activity, enabling hydrogen desorption at around 200°C. The dispersion of the oxides on Mg is found to be closely related to the catalytic process, except for MoO3. Multi oxide states, particularly the 2+ and 3+ oxidation states of transition metals, contribute to the high catalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Alex M. Djerdjev, Pramith Priyananda, Jeff Gore, James K. Beattie, Chiara Neto, Brian S. Hawkett
Summary: Ammonium nitrate is a major commodity chemical used as a fertilizer and explosive. Research has shown that NOx gas accumulates during an induction period, leading to the generation of nitrous acid. Layered double hydroxides and the urea/MnO2 catalyst system have been found to be effective alternative methods for inhibiting the thermal decomposition of ammonium nitrate.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Akihiko Kato, Satoru Kato, Yasutaka Nagai
Summary: The study found that the performance of the NOX storage and reduction catalyst is influenced by the temperature and amount of stored NOX. Moderate temperature and controlled NOX storage amount are beneficial for enhancing the catalyst's performance.
KAGAKU KOGAKU RONBUNSHU
(2021)
Article
Chemistry, Applied
Vasyl Marchuk, Xiaohui Huang, Vadim Murzin, Jan-Dierk Grunwaldt, Dmitry E. Doronkin
Summary: This study investigates the reaction mechanism and performance variation of bifunctional Fe-Pt ammonia slip catalysts, revealing the significant influence of active metal state on reaction conditions and catalyst bed layout. The study also examines the impact of non-equilibrium phenomena on catalytic performance.
TOPICS IN CATALYSIS
(2023)
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, Multidisciplinary
Meng Yang, Jiafeng Yu, Anna Zimina, Bidyut Bikash Sarma, Lakshmi Pandit, Jan-Dierk Grunwaldt, Ling Zhang, Hengyong Xu, Jian Sun
Summary: Atomically dispersed Zn on ZrO2 support in Cu-based catalysts was achieved via double-nozzle flame spray pyrolysis method, showing superiority in methanol selectivity and yield compared to Cu-ZnO interface and isolated ZnO nanoparticles. Operando X-ray absorption spectroscopy revealed that the atomically dispersed Zn species were induced during the reaction due to the strengthened Zn-Zr interaction. This work provides insight into the rational design of unique Zn species and offers a new perspective for exploring complex interactions in multi-component catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Ivan Surin, Zhenchen Tang, Julian Geiger, Suyash Damir, Henrik Eliasson, Mikhail Agrachev, Frank Krumeich, Sharon Mitchell, Vita A. Kondratenko, Evgenii V. Kondratenko, Gunnar Jeschke, Rolf Erni, Nuria Lopez, Javier Perez-Ramirez
Summary: The discovery of low-valent manganese stabilized on ceria as a stable catalyst for ammonia oxidation to nitrous oxide offers a promising solution to the high manufacturing costs and suboptimal selectivity and stability of nitrous oxide synthesis. The catalyst exhibits higher productivity than state-of-the-art alternatives and establishes a structure-performance relationship.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Kevin Keller, Patrick Lott, Steffen Tischer, Maria Casapu, Jan-Dierk Grunwaldt, Olaf Deutschmann
Summary: The presence of water vapor during the oxidation of methane over PdO-based catalysts inhibits the reaction and deactivates the catalyst. This study investigates the role of different support materials at various water concentrations in the reaction gas mixture. Compared to PdO/Al2O3, SnO2 and ZrO2 show enhanced catalytic activity and stability in the presence of 12% H2O, with CH4 conversion dropping by only 68%. The interaction between Pd species and catalyst support is characterized through thermogravimetric analysis, temperature-programmed reduction experiments, and TEM measurements, and a kinetic scheme is derived from the experimental data.
Article
Chemistry, Physical
Akash Bhimrao Shirsath, Manas Mokashi, Patrick Lott, Heinz Muller, Reihaneh Pashminehazar, Thomas Sheppard, Steffen Tischer, Lubow Maier, Jan-Dierk Grunwaldt, Olaf Deutschmann
Summary: Methane pyrolysis is an attractive process for hydrogen production and carbon sequestration. Understanding the formation of soot particles in methane pyrolysis reactors is important for scaling up the technology, requiring appropriate soot growth models. A numerical simulation is conducted, coupling a mono disperse model, plug flow reactor model, and reaction mechanisms to study the chemical conversion of methane, formation of C-C coupling products and polycyclic aromatic hydrocarbons, and growth of soot particles. The soot growth model considers the effective structure of aggregates and predicts soot mass, particle number, area, volume concentration, and size distribution. Experimental characterization of soot samples is carried out using Raman spectroscopy, transmission electron microscopy (TEM), and dynamic light scattering (DLS) for comparison.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Correction
Chemistry, Physical
Bidyut Bikash Sarma, Jelena Jelic, Dominik Neukum, Dmitry E. Doronkin, Xiaohui Huang, Sarah Bernart, Felix Studt, Jan-Dierk Grunwaldt
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Matteo Vanni, Vera Giulimondi, Andrea Ruiz-Ferrando, Frank Krumeich, Adam H. Clark, Sharon Mitchell, Nuria Lopez, Javier Perez-Ramirez
Summary: The lack of selective and stable catalysts hinders the practical implementation of CH2Br2 hydrodebromination to CH3Br. Palladium has potential as the most active metal for this reaction, but the tendency of metal nanoparticles to form C2+ products and methane limits its use. This study explores the impact of host effects on nanostructured palladium-based hydrodebromination catalysts, and identifies that stabilization of isolated Pd sites on carbon-based supports enables suppression of C-C coupling and promotes selective hydrogenation of the CH2Br* intermediate to CH3Br.
Article
Chemistry, Multidisciplinary
Julian Felix Baumgaertner, Michael Woerle, Christoph P. Guntlin, Frank Krumeich, Sebastian Siegrist, Valentina Vogt, Dragos C. Stoian, Dmitry Chernyshov, Wouter van Beek, Kostiantyn V. Kravchyk, Maksym V. Kovalenko
Summary: Pyrochlore-type iron (III) hydroxy fluorides (Pyr-IHF) are attractive as low-cost stationary energy storage materials due to their stable supply of constituent elements, high energy densities, and fast Li-ion diffusion. However, their commercial use is currently hindered by the high costs of synthesis and cathode architecture. In this study, a facile and cost-effective dissolution-precipitation synthesis method for Pyr-IHF from soluble iron (III) fluoride precursors is presented. The synthesized Pyr-IHF demonstrates high capacity retention of >80% after 600 cycles at a high current density of 1 A g(-1) without complex electrode engineering. Operando synchrotron X-ray diffraction is used to guide the selective synthesis of Pyr-IHF and investigate the effect of different water contents on rate capability. Li-ion diffusion is found to occur in the 3D hexagonal channels of Pyr-IHF formed by corner-sharing FeF6-x(OH)(x) octahedra.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Akash Bhimrao Shirsath, Mariam L. Schulte, Bjarne Kreitz, Steffen Tischer, Jan-Dierk Grunwaldt, Olaf Deutschmann
Summary: CO2 methanation via the Sabatier reaction using green H2 is a promising technique for achieving carbon-neutral energy balance. Nickel-based catalysts, due to their low cost and high activity, are commonly used. This study combined numerical simulations with microkinetics and mass transport limitations to compare the performance of two catalysts at different temperatures. Incorporating spectroscopy studies, the importance of integrating modeling with experiments was demonstrated to improve accuracy in multiscale models.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Vera Giulimondi, Andrea Ruiz-Ferrando, Georgios Giannakakis, Ivan Surin, Mikhail Agrachev, Gunnar Jeschke, Frank Krumeich, Nuria Lopez, Adam H. Clark, Javier Perez-Ramirez
Summary: This study demonstrates the bifunctionality of carbon supports and metal sites in the acetylene hydrochlorination catalytic cycle, and proposes potential binding sites for acetylene and a viable reaction profile. The results highlight the importance of optimizing both metal and support components for catalyst design.
NATURE COMMUNICATIONS
(2023)
Correction
Chemistry, Physical
Bidyut Bikash Sarma, Jelena Jelic, Dominik Neukum, Dmitry E. Doronkin, Xiaohui Huang, Sarah Bernart, Felix Studt, Jan-Dierk Grunwaldt
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Vasyl Marchuk, Xiaohui Huang, Jan-Dierk Grunwaldt, Dmitry E. Doronkin
Summary: The influence of Pt particle size and structure on the catalytic performance in selective ammonia oxidation for emission control applications is poorly understood. In this study, operando XAS was used to complement traditional laboratory tests to determine the factors governing activity and selectivity in Pt catalysts with different particle sizes. It was found that the increase in activity with particle size was mainly due to the presence of favorable Pt ensembles on the surface. Spectroscopic data revealed different reaction mechanisms for particles above and below a size threshold of about 2 nm. The evolution of these mechanisms correlated with catalyst activity and selectivity change.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Meng Yang, Jiafeng Yu, Anna Zimina, Bidyut Bikash Sarma, Jan-Dierk Grunwaldt, Habib Zada, Linkai Wang, Jian Sun
Summary: Converting CO2 into methanol is of great significance in the sustainable methanol economy. In this study, single-site Zr species in an amorphous SiO2 matrix were created by enhancing the Zr-Si interaction in Cu/ZrO2-SiO2 catalysts. It was found that CO2 preferentially adsorbs on the interface of Cu and single-site Zr, rather than on ZrO2 nanoparticles. Methanol synthesis was verified to occur on single-dispersed Zr sites, while the ordinary formate pathway occurred on ZrO2 nanoparticles. This work opens up new possibilities for understanding the role of atomically dispersed oxides in catalysis science.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
