Article
Environmental Sciences
Yuping Huang, Xinwei Zhu, Denghui Wang, Shien Hui
Summary: This study investigated the thermal catalytic degradation of formaldehyde on manganese-based catalysts. The primary reaction pathways of formaldehyde on the MnO2(110) surface were elucidated using theoretical simulations and experimental methods. It was found that the oxidation of formaldehyde involves multiple elementary reactions, including O-2 adsorption and dissociation, formaldehyde adsorption and dehydrogenation, CO2 desorption, H2O formation and desorption, oxygen vacancy supplementation, and others. The rate-limiting step was identified as the hydrogen migration process. Among the doped catalysts, Fe-doped MnO2 exhibited the best performance.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Zihao Zheng, Shipeng Wu, Zhen Huang, Hualong Xu, Wei Shen
Summary: A series of sulfated ceria-zirconia composite oxides (CeZrOx) supported platinum catalysts (Pt/CeZr-S) were prepared using a support sulfation strategy, which exhibited significantly enhanced catalytic activity and higher tolerance to SO2 poisoning.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Chemical
Wei Liu, Wenjie Xiang, Nana Guan, Ruoyang Cui, Hao Cheng, Xi Chen, Zhongxian Song, Xuejun Zhang, Yinmin Zhang
Summary: The study found that constructing Co3O4-MnO2 interfaces significantly enhanced the catalytic activity of Co3O4/MnO2 catalysts, especially for Co3O4/α-MnO2 and Co3O4/γ-MnO2. The best catalyst Co3O4/α-MnO2 achieved a toluene conversion rate of 90% at 248 degrees Celsius and complete oxidation of toluene at 260 degrees Celsius, demonstrating great potential for practical applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Xuxu Zhai, Luming Li, Shuang Song, Junjun Zhang, Jun Ma, Chongrui Xie, Wei Chu
Summary: A series of MnO2 catalysts with different crystal forms were successfully synthesized by inducing self-doping of Mn through bridging interaction with carboxyl group. Among them, the dual crystal structure catalyst, MnCA-4, demonstrated the best catalytic performance in toluene oxidation, attributed to the interaction between different crystal structures. The study also revealed that MnCA-4 catalyst had stronger adsorption and activation abilities towards toluene.
Article
Engineering, Environmental
Ming Zhang, Fengqi Zhao, Hui Li, Zhifeng Yuan, Shuai Dong, Ying Wang, Xueli Chen, Yanjing Yang, Xiuduo Song, Zhoufeng Jiang
Summary: A series of novel graphene-salen metal nanocomposites were designed, synthesized and characterized, with S-792-Ni showing the best effect on the combustion performance of HMX-CMDB propellant. The interaction mechanisms of S-792-Ni with energetic components HMX and NC/NG were revealed, showing a significant increase in decomposition heat and improved burning rate of the propellant.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Xuxu Zhai, Fangli Jing, Luming Li, Xia Jiang, Junjun Zhang, Jun Ma, Wei Chu
Summary: A series of layered manganese oxides catalysts were successfully prepared by self-driving combustion (SDC) technology using potassium permanganate and citric acid as precursors. Noble metals were employed to modulate the obtained manganese oxide matrix, resulting in new nanocatalysts with improved catalytic performance, with 0.5Pt-SDC-13 exhibiting the highest activity.
Article
Chemistry, Multidisciplinary
Ruijie Yang, Zhongjie Guo, Lixin Cai, Rongshu Zhu, Yingying Fan, Yuefeng Zhang, Pingping Han, Wanjian Zhang, Xiangang Zhu, Qitong Zhao, Zhenye Zhu, Chak Keung Chan, Zhiyuan Zeng
Summary: This study investigates the catalytic activity of six types of MnO2 with different crystal phases towards toluene degradation, revealing that the crystal phase plays a crucial role in determining the catalytic activity. The research further demonstrates that the high catalytic activity of MnO2 is attributed to the abundant oxygen vacancies and strong mobility of oxygen species.
Article
Chemistry, Physical
Chaomin Duan, Mianwu Meng, Huang Huang, Heng Wang, Hua Ding, Qi Zhang
Summary: An Ag-promoted Cr/MnO2 catalyst was synthesized and used for the catalytic oxidation of low-concentration indoor formaldehyde. The catalyst showed high removal efficiency and excellent recycling stability and activity in a humid environment.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Review
Chemistry, Applied
Xiangbo Feng, Lei Jiang, Danyang Li, Shaopeng Tian, Xing Zhu, Hua Wang, Chi He, Kongzhai Li
Summary: Methane, as a primary type of clean energy, is the second most important greenhouse gas after CO2. Large quantities of lean methane are emitted into the atmosphere during coal mine, oil, and natural gas production, leading to energy loss and greenhouse effect. Utilizing lean methane is challenging, but catalytic combustion is a vital pathway to reduce emissions. This review discusses the development, challenges, and prospects of catalytic lean methane combustion technology, with a focus on heat management from the perspective of material design and reactor configuration.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Engineering, Environmental
Jing Sun, Tianqi Zhang, Jungmi Hong, Rusen Zhou, Hassan Masood, Renwu Zhou, Anthony B. Murphy, Kostya Ken Ostrikov, Patrick J. Cullen, Emma C. Lovell, Rose Amal, Ali Rouhollah Jalili
Summary: Current industrial nitrogen fixation technology relies on fossil fuels and has negative environmental impacts, but using electricity-driven non-thermal plasma catalysis shows promise for sustainable nitrogen fixation. This study combines a structured catalyst with a water-electrode bubble reactor to fix nitrogen at ambient conditions with high selectivity and stability. The enhanced production of nitrate ions is attributed to abundant oxidized nitrogen species from the air plasma, with the TiO2 supported by graphene oxide playing a crucial role in improving nitric oxide surface association and minimizing backward dissociation. These findings advance the potential of plasma-catalyzed nitrogen fixation for clean energy and eco-friendly chemical production.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Jianfei Yao, Fang Dong, Hua Feng, Zhicheng Tang
Summary: A hydrophobic coating was designed on the surface of monolithic Co3O4/NF catalyst to improve its water-resistance and catalytic activity under moist conditions. The thickness of the hydrophobic layer significantly affected the catalyst's activity, and the construction of a superhydrophobic surface effectively inhibited the adsorption of water molecules.
Article
Chemistry, Physical
Zhihao Fang, Mengyuan Huang, Bing Liu, Jie Chen, Feng Jiang, Yuebing Xu, Xiaohao Liu
Summary: This study reports a Fe-MOR-F catalyst prepared via freeze-drying method, which exhibits excellent catalytic performance for the direct oxidation of methane under mild conditions. Various characterizations reveal that the catalyst possesses highly dispersed monomeric and dimeric iron species, which are strongly correlated to its high catalytic activity. These structural characteristics endow the catalyst with superior performance for direct methane oxidation.
Article
Chemistry, Physical
Raziyeh Jokar, Seyed Mehdi Alavi, Mehran Rezaei, Ehsan Akbari
Summary: The study found that the 10wt% CuO/MnO2 catalyst exhibited the best catalytic performance in CO preferential oxidation reaction, attributed to the synergistic interaction between copper and manganese. However, adding CO2 and/or H2O to the feedstock decreased the catalyst performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Zhuo Wang, Kaiyuan Xie, Baishun Jiang, Shufeng Zuo, Qiuyan Wang
Summary: AlNi-PILC catalyst was synthesized and supported with MnO2. The structure of the catalyst is damaged after sulfur poisoning, leading to a decrease in specific surface area and pore volume, which in turn results in decreased catalytic performance.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Kun Chen, Yang Hu, Xiaoyan Dong, Yan Sun
Summary: The fusion of a zwitterionic polypeptide to PETase has been shown to enhance catalytic performance and increase product release in the degradation of highly crystallized PET films. Structural analysis and molecular simulations reveal the enhanced stability and substrate binding properties of EKylation-modified PETases.
Article
Chemistry, Inorganic & Nuclear
Luming Li, Dapeng Liu, Zhanglong Guo, Yan Liu, Wei Chu
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Zhanglong Guo, San Hua Lim, Wei Chu, Yan Liu, Armando Borgna
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Chemistry, Physical
Hmoud Al Dmour, Fethi Kooli, Ahmed Mohmoud, Yan Liu, Saheed A. Popoola
Summary: The study successfully removed dye molecules using two doped porous clay heterostructures, with Zr-PCH showing higher efficiency and better regeneration performance compared to Al-PCH, which exhibited lower removal efficiency and significant reduction in efficiency after regeneration.
Article
Chemistry, Physical
Xin Xiao, Jiajie Wang, Jing Li, Hui Dai, Fangli Jing, Yan Liu, Wei Chu
Summary: Mn-doped NiMgAl mixed-oxide catalysts showed enhanced catalytic performance, with NiMn5-LDO delivering the best results. Mn dopants tuned the interaction between Ni and Mg(Mn)AlOx support, promoting the reduction of NiO and achieving a higher surface basicity strength.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Xin Xiao, San Hua Lim, Wei Chu, Yan Liu
Summary: Tailoring the metal properties over N-doped carbon materials is crucial for lignocellulose/cellobiose hydrogenation reactions. By adjusting the metal-support interaction and optimizing the content of N, excellent catalytic performance was achieved, indicating N-doped carbon materials as promising supports for a wide range of biomass hydrogenation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Luming Li, Dapeng Liu, Zhanglong Guo, Shibo Xi, Wei Chu, Yan Liu
Summary: The study demonstrates that Ce-doped Ni/SBA-15-CTA catalysts exhibit efficient catalytic performance and resistance to coke deposition in methane dry reforming reaction, displaying higher durability and stability.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Physical
Xin Xiao, Jiajian Gao, Shibo Xi, San Hua Lim, Alyssa Kai Wen Peng, Armando Borgna, Wei Chu, Yan Liu
Summary: Researchers have developed a catalyst in which Cu partially replaces the bivalence position in the MgAl hydrotalcite structure, and compared it with traditional impregnation methods. The results show that there is a strong synergistic interaction between Cu and Pd, resulting in the superior performance of the Pd-0.4@CuMgAlOx catalyst in CO2 hydrogenation to formate.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Saheed A. Popoola, Hmoud Al Dmour, Souad Rakass, Is Fatimah, Yan Liu, Ahmed Mohmoud, Fethi Kooli
Summary: Zirconium porous clay heterostructures were synthesized and showed improved performance in adsorbing basic blue-41 dye.
Article
Chemistry, Physical
Luming Li, Jie Deng, Zhanglong Guo, Wei Chu, Yan Liu
Summary: In this study, an improved method was proposed to prepare HMS materials using a single non-ionic triblock copolymer (F127) structure-directing agent under a mild polycarboxylic (citric acid) mediated condition. The citric acid medium was found to have an important bridging effect, contributing to the self-assemblage of partially protonated non-ionic triblock copolymer and tetraethyl orthosilicate (TEOS) into a high-quality multistage structure of silica materials. The specific surface area (SSA) of HMS showed a volcanic trend and was closely associated with the concentration of citric acid.
Review
Chemistry, Multidisciplinary
Jiajian Gao, Yan Liu, Bin Liu, Kuo-Wei Huang
Summary: This review provides an overview of the importance and recent progress of iridium catalysts for acidic OER. It includes the introduction of surface and bulk Pourbaix diagrams of iridium species, elaboration on different types of iridium-based catalysts, and summary of research on reaction intermediates and kinetics.
Article
Engineering, Environmental
San Hua Lim, Shibo Xi, Takashi Sato, Norikazu Konishi, Jia E. Zheng, Yan Liu, Masaru Utsunomiya, Armando Borgna
Summary: Researchers have developed a regenerable acidic catalyst for 4,4-Bisphenol-A (BPA) production, achieving full acetone conversion with high selectivity. The catalyst, doped with indium and titanium, exhibits stable and comparable performance to commercial resin catalysts, and can be easily regenerated through calcination. The catalyst's potential extends beyond BPA production to other acid catalyzed reactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Zhanglong Guo, Yanan Zhou, San Hua Lim, Wei Chu, Yan Liu
Summary: N-doped carbon nanotubes were used as anchoring sites for Ru catalysts, resulting in improved hexitols yield in cellobiose conversion. The N-anchored Ru active phase enhanced the activation ability and amount of activated H-2, leading to a much higher hexitols yield compared to other catalysts. DFT simulation results confirmed the enhanced H-2 activation ability through strong interaction between Ru and graphitic-N. This research highlights a green and facile strategy for improving H-2 activation capability in hydrogenation applications.
Review
Engineering, Environmental
Jiajian Gao, Simon Choo Sze Shiong, Yan Liu
Summary: Reducing carbon dioxide to valuable chemicals and fuels via thermocatalysis or electrocatalysis is a sustainable way to address carbon abatement and climate change. Thermocatalysis is scalable but limited by kinetics and thermodynamics, while electrocatalysis has advantages such as lower temperature and pressure, but requires more effective and stable catalysts. This review summarizes the progress and compares catalysts and reaction mechanisms in CO2 conversion via thermocatalysis and electrocatalysis.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Ahmed Mohmoud, Fethi Kooli, Yan Liu
DESALINATION AND WATER TREATMENT
(2020)