Article
Engineering, Environmental
Xi Liu, Jianjun Chen, Guochen Zhang, Yang Wu, Puqing Shen, Lin Zhong, Yaoqiang Chen
Summary: Three Ce-modified Pd-Rh bimetallic catalysts were prepared using different methods, with the catalyst prepared by deposition-precipitation (DP) demonstrating the highest catalytic activity and metal dispersion at high temperatures. The interactions between Pd-Rh and Pd-Ce can be adjusted to enhance the performance of Pd-Rh three-way catalyst for NGVs exhaust purification.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Junjie Chen, Kevin Giewont, Eric A. Walker, Jungkuk Lee, Yubiao Niu, Eleni A. Kyriakidou
Summary: Incorporating cobalt (Co) into Pd/BEA catalyst can substantially enhance CH4 oxidation performance at low temperatures, with experimental evidence and DFT calculations explaining the promotion mechanism.
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
Peng Chen, Zaiyong Yang, Shunxin Zhou, Zengxi Wei, Shuangliang Zhao
Summary: By combining theoretical calculations with experimental characterizations, the impact of catalyst structural evolution on catalytic performance was elucidated, showing that different oxygen concentrations and reactants can lead to changes in both the catalyst and catalytic activity. The experimental findings confirmed the dynamic evolution of the palladium oxide catalyst during the reaction. This study provides a microscopic understanding of the complex catalyst-reactant interaction and catalyst deactivation during hydrogen peroxide synthesis.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yuanshuang Zheng, Amaury Decoster, Andrea Osti, Antonella Glisenti, Jean-Philippe Dacquin, Fabien Dhainaut, Svetlana Heyte, Pascal Granger
Summary: New insights into the reaction mechanism for catalytic methane combustion on Pd/La0.7MnO3 catalyst in various operating conditions were provided, suggesting a dual mechanism under lean and dry conditions and a single mechanism near stoichiometry in wet atmosphere.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Applied
Maxime Delporte, Helena Kaper, Fabien Can, Nicolas Bion, Xavier Courtois
Summary: The use of expensive precious metal based catalysts has shown promise for catalytic treatment of residual refractory methane in the exhaust gas from NGV engines. Recent research has found that combining a perovskite with a Pd/YSZ catalyst improves both oxygen exchange behavior and methane oxidation. This study aims to investigate the concept of this dual catalytic bed system under more realistic conditions, and found that the configuration promoted CH4 abatement in lean mixture but was inhibited by CO2 and H2O.
TOPICS IN CATALYSIS
(2023)
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
Mingzhi Wang, Peijie Ma, Zhuangzhuang Wu, Shasha Chu, Yanping Zheng, Zhaohui Zhou, Weizheng Weng
Summary: The determination of dynamic changes in supported Pd catalysts during the CO/Hydrocarbons oxidation reactions is crucial for the development of efficient catalysts for vehicle exhaust purification. This study found that Pd/CeO2 catalysts, prepared by modulating the interaction between Pd precursors and CeO2 support, exhibited different dynamic properties under CO oxidation conditions, and also showed different deactivation behaviors in the presence of C3H6. The chemical states of Pd species on CeO2 during CO oxidation were found to correlate with their redox properties, which significantly influenced the role of C3H6 and H2O in the reactions.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zihan Li, Erran Song, Ruirui Ren, Wuduo Zhao, Tiesheng Li, Minghua Liu, Yangjie Wu
Summary: Pd-Pd/PdO nanoclusters well dispersed on intercalated graphene oxide (GO) exhibited high catalytic activity in the Suzuki coupling reaction. The catalytic mechanism involved heterogeneous catalysis at the interface, and the active centers showed enhanced negative charge to effectively promote the oxidative addition reaction.
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
Chemistry, Physical
Chenggen Li, Qingyang Zhang, Zhenggang Xu, Li Liu, Ting Zhu, Zhiwen Chen, Yuan Dong, Ming Yang
Summary: In this work, a highly dispersed CeO2 nanoparticle-modified Pd/Al2O3 catalyst was prepared and applied for the reversible hydrogenation and dehydrogenation of N-propylcarbazole. The catalyst Pd/CeAl-20 exhibited better catalytic performance compared to the commercially available 1 wt% Pd/Al2O3 catalyst, achieving complete hydrogenation and dehydrogenation within 180 minutes. This study reveals the crucial role of combined promotion of the active site size and chemical microenvironment for N-heterocycle hydrogenation and dehydrogenation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Wenhui Zou, Yingcen Liu, Caicheng Song, Hua Lin, He Huang, Wanyue Ye, Rongwen Lu, Shufen Zhang
Summary: In this study, a series of PdO@MCM-41-x catalysts were synthesized by a one-pot method and found to have excellent catalytic performance for the dehydrogenation of formic acid. The catalysts exhibited small size and high hydrogen selectivity, and the nanoparticles were gradually reduced and regenerated during the reaction, leading to enhanced hydrogen production activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
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
Xinyi Tan, Chang Yu, Xuedan Song, Li Ni, Hanyu Xu, Yuanyang Xie, Zhao Wang, Song Cui, Yongwen Ren, Wenbin Li, Yafang Zhang, Jieshan Qiu
Summary: By manipulating catalyst-electrolyte interfaces in saturated KCl electrolyte, the CO tolerance and activity of Pd/C catalyst can be enhanced. The reconstructed Pd/C catalysts exhibit high activity and stability in the presence of high concentrations of CO. These findings are important for the design and fabrication of active and stable Pd-based catalysts, as well as the manipulation of activity and stability at catalyst-electrolyte interfaces.
Article
Environmental Sciences
Ye Eun Kim, Mi Yeon Byun, Kwan-Young Lee, Man Sig Lee
Summary: The efficient recovery of Pd from spent catalysts through leaching in HCl-H2O2 media and subsequent precipitation with NaOH was studied, resulting in high purity Pd oxide powder with potential applications in glass, ceramic, and catalyst industries.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2021)
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)