Article
Chemistry, Physical
Han Zhao, Hongcheng Li, Yuanlong Tan, Tianzhi Liu, Huifeng Zhang, Qingde Zhang, Hangrong Chen, Yunkun Zhao, Xiao Yan Liu
Summary: The mixing-calcination-aging strategy can enhance the catalytic performance and oxygen storage capacity of three-way catalysts, but it leads to a transient drop in conversion rate, which is caused by the reduction of PdO.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Engineering, Environmental
Weiwei Yang, Mi-Young Kim, Felipe Polo-Garzon, Jian Gong, Xiao Jiang, Zhennan Huang, Miaofang Chi, Xinbin Yu, Xiang Wang, Yanbing Guo, Zili Wu
Summary: This study investigates the effects of thermal aging and sulfur poisoning on the efficiency and lifetime of natural gas three-way catalysts (TWCs). The results show that both thermal aging and sulfur-induced deactivations lead to a degradation in CH4 combustion performance due to the reconstruction of Pd species and decreased reducibility of the support. Sulfation aging promotes the activation of CH4 and O2, but the sulfate also hinders the exchange of lattice oxygen.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Han Zhao, Hongcheng Li, Huifeng Zhang, Depeng Zhao, Zengzan Zhu, Yunkun Zhao
Summary: Careful NH3 or urea treatment can improve the catalytic activity of Pd catalysts, while the newly designed CO-TPR method is closely related to catalyst reducibility and total oxygen storage capacity. When using the most effective Urea-PP technology during monolith converter preparation, an outer layer is needed to protect the inner layer.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Dong Gun Oh, Jaekyoung Lee, Eunseok Kim, Eun Jeong Jang, Ji Man Kim, Ja Hun Kwak
Summary: The study shows that Pd/SiO2 can be an active and durable catalyst for CH4 oxidation with higher activity than Pd/Al2O3 through simple reductive regeneration. It suggests that the deactivation of Pd/SiO2 mainly comes from the blockage of the Pd/PdO surface by the SiO2 overlayer formed during hydrothermal aging.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
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)
Article
Chemistry, Physical
Haoran Du, Xiuping Li, Zhiyang Cao, Shao Zhang, Wenzhao Yu, Fengyu Sun, Shengyao Wang, Jingjing Zhao, Jiaqi Wang, Yuan Bai, Juanjuan Yang, Ping Yang, Bo Jiang, Hexing Li
Summary: In this study, we reported a novel nanocomposite of highly dispersed Au and Fe species on ZnO (AuFe-ZnO). During photocatalytic O2 oxidation of CH4 to CH3OH, this AuFe-ZnO acts as a bifunctional catalyst to drive one-pot cascade reactions (O2 + H2O-* H2O2 and CH4 + H2O2-* CH3OH + H2O). The synergetic effects of Au, Fe, and ZnO result in a high CH3OH yield of 1365 mu mol center dot g- 1 center dot h-1 with high CH3OH selectivity of up to 90.7%.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Qi Li, Xuefeng Chu, Ya Wang, Qilei Yang, Ziang Su, Yue Peng, Wenzhe Si, Junhua Li
Summary: This study used YMn2O5 as a catalytically active support and prepared a dual-site catalyst, Pd/YMn2O5, which showed high CH4 catalytic activities in both dry and wet atmospheres. Experimental and theoretical studies revealed that the interactions between PdOx and YMn2O5 significantly enhanced the CH4 adsorption and lattice oxygen activity of the support.
Article
Chemistry, Multidisciplinary
Taiki Hirakawa, Yuma Miyahara, Yushi Shimokawa, Koshi Nishiyama, Masayuki Tsushida, Hiroshi Yoshida, Junya Ohyama, Masato Machida
Summary: In this research, various quaternary metal catalysts were investigated for the replacement of precious metals in three-way catalysts. The CrFeNiCu system demonstrated the best catalytic performance, achieving a lower light-off temperature for CO, C3H6, and NO compared to a reference catalyst. Structural analysis revealed that the catalyst underwent structural changes during the catalytic reaction. The presence of Cr oxide significantly enhanced CO/C3H6 oxidation and promoted the regeneration of the active NiCu metallic surface for NO reduction.
Article
Chemistry, Physical
Francesco Arena, Francesco Ferrante, Roberto Di Chio, Giuseppe Bonura, Francesco Frusteri, Leone Frusteri, Antonio Prestianni, Sara Morandi, Gianmario Martra, Dario Duca
Summary: The study revealed that Mn(IV) sites facilitate the conversion of CO to CO2, with MnCeOx catalysts having a high exposure of Mn(IV) sites showing exceptional CO oxidation performance. However, the oxidation activity of H-2 is limited. Empirical findings suggest that MnO2 materials have the potential to be efficient and robust PROX catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Rama Krishna Dadi, Rohil Daya, Ashok Kumar, Saurabh Y. Joshi, Hongmei An, Michael J. Cunningham, Neal W. Currier, Aleksey Yezerets
Summary: A state-of-the-art Pt-Pd catalyst was hydrothermally treated at different conditions to investigate the hydrothermal stability of NO oxidation. The NO oxidation activity was observed to decrease with an increase in aging duration at all aging temperatures. A global kinetic model of NO oxidation was used to estimate the change in NO oxidation rate under different hydrothermal aging conditions, and a deactivation Model with Residual Activity (DMRA) was developed to capture the impact of hydrothermal aging temperature and duration on NO oxidation activity. Additionally, a global kinetic model that accounts for the change in PGM oxidation state during NO oxidation has been presented.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Nanoscience & Nanotechnology
Junhua Li, Qi Li, Ya Wang, Wenzhe Si, Yue Peng
Summary: By studying Pd/ZrO2 catalysts, the potential relationship among Pd particle morphology, electron transfer, CH4 oxidation mechanism, and catalytic activity was investigated. PZ70 catalyst showed the best catalytic activity, and the metal-support interaction in PZ70 facilitated the acceleration of CH4 combustion.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Ralitsa Velinova, Anton Naydenov, Diana Kichukova, Ventsislav Tumbalev, Genoveva Atanasova, Daniela Kovacheva, Ivanka Spassova
Summary: This work presents Pd-containing catalysts for the complete oxidation of VOCs with enhanced low-temperature activity. The catalysts, composed of reduced graphene oxide (RGO) and alumina, show long-term stability and the ability to completely oxidize various VOCs and CO at low temperatures (100-350°C). The optimal Pd/PdO ratio for high activity and stability is found to be close to 1:1.
Article
Chemistry, Physical
Mohammad Yusuf, Mukarram Beg, Mohd Ubaidullah, Shoyebmohamad F. Shaikh, Lau Kok Keong, Klaus Hellgardt, Bawadi Abdullah
Summary: The reaction kinetics of DRM over high-performance NieW/Al(2)O(3)-MgO bimetallic catalyst were investigated in a fixed bed reactor. The study found that the reaction rate of DRM is more sensitive to CH4 partial pressure compared to CO2 partial pressures. The activation energies for the consumption of CH4 and CO2 were determined to be 45.9 and 31.9 kJ/mol, respectively, indicating a higher energy barrier for CH4 activation. The Langmuir-Hinshelwood model showed the best fit between experimental and estimated reaction rates.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Si-Jia Guan, Peng Zhang, Shen-Jing Ji, Yu Cao, Nian-Tzu Suen
Summary: The presence of iron impurities in nickel-based electrocatalysts affects the oxygen evolution reaction (OER). Internal iron is found to facilitate phase transformation and improve OER performance.
INORGANIC CHEMISTRY
(2022)
Article
Engineering, Chemical
Roshni Sajiv Kumar, Robert E. Hayes, Natalia Semagina
Summary: This study investigated the kinetic behavior of methane combustion on hydrothermally aged SnO2 and Al2O3 supported 1 wt% Pd and 1 wt% Pd-Pt(1:1) catalysts in the presence of 5 and 10 vol% H2O. Different reaction kinetics and activation energies were observed for the catalysts depending on the support material and Pt addition. The Pd-Pt/SnO2 catalyst demonstrated the highest turnover frequency and the least deactivation during hydrothermal aging.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Environmental
Jian Gong, Christopher J. Rutland
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2015)
Article
Engineering, Mechanical
Jian Gong, Christopher J. Rutland
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
(2015)
Article
Engineering, Chemical
Jian Gong, Kushal Narayanaswamy, Christopher J. Rutland
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2016)
Article
Engineering, Environmental
Jian Gong, Sandeep Viswanathan, David A. Rothamer, David E. Foster, Christopher J. Rutland
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2017)
Article
Engineering, Environmental
Jian Gong, Mark L. Stewart, Alla Zelenyuk, Andrea Strzelec, Sandeep Viswanathan, David A. Rothamer, David E. Foster, Christopher J. Rutland
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Chemistry, Applied
Jian Gong, Di Wang, Junhui Li, Krishna Kamasamudram, Neal Currier, Aleksey Yezerets
Article
Engineering, Chemical
Yujun Wang, Yulin Pan, Changsheng Su, Arland Srinivasan, Jian Gong, Carl J. Kamp
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2018)
Article
Chemistry, Applied
Jian Gong, Josh Pihl, Di Wang, Mi-Young Kim, William P. Partridge, Junhui Li, Michael Cunningham, Krishna Kamasamudram, Neal Currier, Aleksey Yezerets
Summary: The study evaluated the effects of oscillations in gas composition on the performance of a commercial Pd-based three-way catalyst for stoichiometric natural gas engines. The relationship between CH4 conversion and lambda change was explored, with the findings indicating that dynamic CH4 conversion is related to catalyst oxidation state. O-2 dosage was proposed as an effective descriptor of TWC dithering performance, and maps of dithering amplitude and O-2 dosage provide insights into optimal operation strategies for high CH4 and NO conversions.
Review
Energy & Fuels
Yujun Wang, Carl J. Kamp, Yuesen Wang, Todd J. Toops, Changsheng Su, Ruoqian Wang, Jian Gong, Victor W. Wong
Article
Engineering, Environmental
Yujun Wang, Jian Gong, Changsheng Su, Qisheng Ou, Qiang Lyu, David Pui, Michael J. Cunningham
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Review
Chemistry, Physical
Weiwei Yang, Jian Gong, Xiang Wang, Zhenghong Bao, Yanbing Guo, Zili Wu
Summary: This review focuses on the effects of sulfur on the catalytic oxidation of NO, HCs, and CO over DOCs, as well as the challenges in understanding the sulfur influence mechanism and designing next-generation sulfur-resistant DOCs.
Article
Engineering, Environmental
Weiwei Yang, Mi-Young Kim, Felipe Polo-Garzon, Jian Gong, Xiao Jiang, Zhennan Huang, Miaofang Chi, Xinbin Yu, Xiang Wang, Yanbing Guo, Zili Wu
Summary: This study investigates the effects of thermal aging and sulfur poisoning on the efficiency and lifetime of natural gas three-way catalysts (TWCs). The results show that both thermal aging and sulfur-induced deactivations lead to a degradation in CH4 combustion performance due to the reconstruction of Pd species and decreased reducibility of the support. Sulfation aging promotes the activation of CH4 and O2, but the sulfate also hinders the exchange of lattice oxygen.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jian Gong, Di Wang, Junhui Li, Neal Currier, Aleksey Yezerets
APPLIED CATALYSIS B-ENVIRONMENTAL
(2017)
Proceedings Paper
Engineering, Mechanical
Jian Gong, Christopher J. Rutland
PROCEEDINGS OF THE ASME INTERNAL COMBUSTION ENGINE DIVISION, FALL TECHNICAL CONFERENCE, 2014, VOL 1
(2014)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)