Article
Environmental Sciences
Rongrong Fan, Zhaoqiang Li, Yu Wang, Yan Wang, Zhiyong Ding, Cheng Zhang, Na Kang, Xin Guo, Rong Wang
Summary: ZrO2 and WO3 additives were found to synergistically improve the activity and thermal stability of diesel oxidation catalysts, enhancing the oxidation reactions of CO, C3H6, and NO. ZrO2 improved metal dispersion and increased surface-chemisorbed oxygen, while WO3 increased active sites and metal dispersion in fresh samples.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Yunan Li, Luozhen Jiang, Gui Zhao, Lingling Guo, Chen Tian, Xin Tao, Meng Du, Bing Nan, Xi Liu, Lina Li
Summary: High metal dispersion supported catalysts have been widely studied due to their high atom utilization and excellent activities in various catalytic reactions. In this work, Pt/Y2O3-HT catalyst was synthesized through a modified wet-impregnation method. The CO oxidation activity of Pt/Y2O3-HT was significantly improved compared to Pt/Y2O3 without hydrothermal modification. The comprehensive experiment results showed that hydrothermal aging at 200 degrees C enhanced the basicity of yttria support and greatly improved the dispersion of platinum at atomic level.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
Yu-Long Men, Peng Liu, Yi Liu, Xin-Yu Meng, Yun-Xiang Pan
Summary: Researchers have developed a noble-metal-free catalyst, WO3-decorated carbon nanotubes, that exhibits high activity, fast response, and excellent stability in electrocatalytic glucose oxidation reactions. This catalyst shows great potential for building efficient biofuel cells and sophisticated devices for accurately detecting trace amounts of glucose.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Xu-Fang Wang, Lin-Ya Xu, Cai-Hao Wen, Dan -Dan Li, Bei Li, Ji-Qing Lu, Qi-Hua Yang, Meng- Fei Luo, Jian Chen
Summary: In this study, it was discovered that enhancing strong metal-support interaction effectively weakens the competitive adsorption of H2O on Pt active sites in Pt-based catalysts. The formation of aggregated WO3 species in Pt-3W/SO42--ZrO2 leads to enhanced SMSI, which plays a critical role in weakening water vapor adsorption on active sites. As a result, Pt-3W/SO42--ZrO2 exhibits the highest activity (T90 = 200 degrees C) and water tolerance among Pt/ZrO2, Pt/WO3, Pt-3W/ZrO2, and Pt/SO42--ZrO2 under wet conditions (5% H2O). Our preliminary findings provide a promising strategy for designing superior platinum catalysts for VOCs complete oxidation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Applied
Teng-ge Mi, Yang-wen Wu, Xin-yue Zhou, Wen-tao Li, Li Zhao, Ji Liu, Qiang Lu
Summary: The study investigates the mechanisms of carbon monoxide (CO) oxidation on two SCR catalyst models and finds that the CO oxidation cycle consists of two key stages. The activation energy for CO oxidation on V2O5/TiO2 surface is lower than that on V2O5-WO3/TiO2, indicating that WO3 doping inhibits the CO oxidation.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jochen Schuetz, Heike Stoermer, Patrick Lott, Olaf Deutschmann
Summary: The study reveals that aging catalysts leads to a decline in catalytic activity due to particle sintering, and bimetallic catalysts undergo morphological changes during hydrothermal treatment, transforming from core-shell structures to heterogeneous agglomerates.
Article
Chemistry, Physical
Shaohua Xie, Wei Tan, Chunying Wang, Hamidreza Arandiyan, Magnus Garbrecht, Lu Ma, Steven N. Ehrlich, Peng Xu, Yaobin Li, Yan Zhang, Samantha Collier, Jiguang Deng, Fudong Liu
Summary: In this study, a novel Pt catalyst was prepared on a CeO2/Al2O3 support through a unique deposition strategy, demonstrating excellent thermal stability and low-temperature CO oxidation activity. The stable Pt single sites were transformed into highly active Pt clusters, resulting in efficient CO oxidation at low temperatures. The identification of active sites revealed that Pt cluster step and terrace sites, as well as Pt-CeO2 interfaces, played crucial roles in the catalyst's activity.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Zhengcheng Wang, Shangyan Zhou, Wei Liao, Qingmei Wang
Summary: In this study, PtCo alloys catalysts supported on multiwalled carbon nanotubes (MWCNTs) were prepared with improved methanol oxidation reaction (MOR) properties and anti-CO poisoning ability. The Pt1Co3@NC/MWCNTs sample with moderate Co2+ feeding content showed a 1.93-fold enhancement in MOR mass activity compared to commercial Pt/C catalyst. Additionally, it displayed a lower CO oxidation onset potential. The improvements in MOR activity, durability, and anti-CO poisoning ability were attributed to the moderate surface compositions, optimal electronic interaction, and the protection of N-doped carbon (NC) shells. This study provides a new direction for the design and fabrication of highly efficient electrocatalysts for DMFCs applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
A. T. Matveev, K. L. Firestein, A. S. Konopatsky, I. N. Volkov, D. V. Leybo, A. P. Koskin, A. A. Vedyagin, D. V. Golberg, P. B. Sorokin, D. V. Shtansky
Summary: A new simple and scalable method for synthesizing nanocrystalline Pt-containing hexagonal boron oxynitride (Pt/BN(O)) is proposed. Pt is present only in the form of single atoms (SAs) and clusters at a minimum content of 0.0085 wt%. This sample shows high catalytic activity for CO oxidation with a specific CO2 productivity as high as 176 molCO2/gPt/h at 300 degrees C, and it retains its activity after four cycles.
Article
Chemistry, Multidisciplinary
Rabia Naeem, Saba Afzal, Muhammad Adil Mansoor, Khadija Munawar, Bibi Sherino, Riaz Ahmed
Summary: The deposition of platinum nanoparticles on a WO3-C support improves the bandgap and electrochemical behavior of the catalysts for the oxidation of methanol. The Pt/WO3-C catalyst has higher specific surface area, peak current, and exchange current compared to Pt/C and Pt/WO3. The heterogeneous constant for methanol oxidation is 10 and 3 times higher for Pt/WO3-C than for Pt/C and Pt/WO3, respectively. Adding WO3 to the support enhances the optical properties, efficiency, and durability of Pt/C.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Energy & Fuels
Yulu Liu, Chenghua Xu, Wanglai Cen, Hao Li
Summary: First-principle calculations and catalytic modeling enable the design of fuel combustion catalysts, reducing the need for trial-and-error experiments. This study discusses a design strategy for bifunctional catalysts, where different reactants occupy different sites on the surface, leading to a poisoning-free active interface.
Article
Chemistry, Physical
Boyang Zhang, Jing Liu, Wanqin Yu, Jie Gao, Xuejing Cui, Luhua Jiang
Summary: In this study, a novel core-shell structured Pt@NC/C catalyst was developed, with ultrafine Pt nanoparticles as the core and ultra-thin nitrogen-doped carbon layers as the shell. The catalyst exhibited excellent activity for the alkaline hydrogen oxidation reaction, with high mass activity and specific activity. Moreover, it showed good anti-CO poisoning ability. The interaction between Pt and the carbon layer enhanced hydroxyl adsorption, promoting reaction kinetics and improving CO resistance. This work provides a facile and feasible strategy for designing efficient and CO-resistant Pt-based catalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Jianlin Cao, Xiaoqian Zhang, Xinxin Ou, Tao Liu, Tao Xing, Zhi Li, Xin Zhou, Hao Yan, Yibin Liu, Xiang Feng, Yongxiao Tuo, Chaohe Yang, De Chen
Summary: Developing efficient and stable catalysts for preferential oxidation of CO (CO-PROX) is crucial for industrial hydrogen resource purification. The introduction of dual promoters, Fe and K, optimizes the adsorption behaviors of reactants and achieves high CO conversion and CO2 selectivity under realistic application temperature range.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Haiying Wei, Tongtong Wei, Licheng Li, Tingwei Zhang, Farzad Seidi, Yongcan Jin, Huining Xiao
Summary: Three types of Pt/CeO2 catalysts (rod-shaped (CeO2-R), cube-shaped (CeO2-C), and octahedral-shaped (CeO2-O)) with different support morphologies were synthesized and investigated for catalytic oxidation of C2H4 at low temperatures. The catalysts showed shape-dependent catalytic activity, with Pt/CeO2-O exhibiting the highest activity. This can be attributed to the different oxygen species activated by the catalysts in the C2H4 oxidation process. Additionally, the negative impact of water condensation on the catalyst can be eliminated by refreshing the catalyst with N2 purging. Overall, this work provides a novel catalytic system for efficient low-temperature ethylene oxidation and enhances our understanding of the catalytic mechanism.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Xidi Li, Minhua Ai, Xiangwen Zhang, Ji-Jun Zou, Lun Pan
Summary: In this study, a highly efficient and stable WO3 photoanode was constructed using a combination of transition metal doping and dual co-catalysts modification. The presence of abundant surface oxygen vacancies in Zn-WO3 was found, which, combined with the dual cocatalysts layer, improved carrier mobility, enhanced carrier separation and injection efficiency. The optimal 9-Zn-WO3-Fe/Co photoanode exhibited a photocurrent of 3.63 mA/cm2 at 1.23 V vs. RHE, equivalent to 90.7% of the theoretical value of WO3.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Applied
Jing Wang, Kaihang Sun, Xinyu Jia, Chang-jun Liu
Summary: Highly dispersed Rh/In2O3 catalyst prepared by deposition-precipitation method shows excellent activity and selectivity for CO2 hydrogenation to methanol, promoting the reaction even at lower temperatures.
Review
Chemistry, Physical
Zhitao Zhang, Chenyang Shen, Kaihang Sun, Xinyu Jia, Jingyun Ye, Chang-jun Liu
Summary: Supported Ni catalysts have great potential in CO2 hydrogenation, with products including methane, carbon monoxide, methanol, and formic acid. The electronic and geometric structures of the catalyst significantly affect the activity and selectivity of the reaction, with selectivity depending on the support. To enhance activity, stability, and tunable selectivity, structure control of the Ni catalyst is crucial.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Chemical
Mengyu Xia, Wanyan Ding, Chenyang Shen, Zhitao Zhang, Chang -jun Liu
Summary: In this study, the decomposition of CO2 was achieved using a frosted dielectric barrier discharge (FDBD) with CeO2 enhancement, resulting in increased conversion and energy efficiency. The CeO2-enhanced FDBD showed improved microdischarge performance compared to traditional DBD with CeO2 fine particles, and it was also easier to load and remove.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Chenyang Shen, Kaihang Sun, Rui Zou, Qinglei Wu, Donghai Mei, Chang-jun Liu
Summary: In this study, the size of In2O3-supported rhenium (Re) catalysts was found to significantly impact the CO2 hydrogenation reaction. Atomically dispersed Re species with a positive charge on the Re/In2O3 catalyst surface showed high activity and stability for CO2 hydrogenation to methanol, while the presence of Re nanoclusters favored methane production. Catalyst characterization and theoretical calculations confirmed the influence of catalyst size on hydrogen activation and the selectivity of the CO2 hydrogenation reaction.
Article
Chemistry, Physical
Kaihang Sun, Chenyang Shen, Rui Zou, Chang -jun Liu
Summary: This study demonstrates high activity and enhanced CO tolerance for CO2 hydrogenation to methanol on Pt/In2O3-ZrO2 catalyst. The addition of ZrO2 enables stronger electron transfer between Pt and In2O3-ZrO2, leading to weaker CO adsorption and improved CO tolerance of Pt catalyst. The ZrO2-modified oxygen vacancy promotes CO2 activation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Kai-li Wu, Xiang Li, Zhong-xing Xu, Chang-jun Liu
Summary: In this study, a gas distributor was designed and fabricated using light-curing 3D printing technology to optimize the pore size and distribution. When combined with a glass vessel, the printed gas distributor formed a simple carbonation reactor that produced small-sized bubbles continuously and uniformly without stirring. This approach led to an enhanced and efficient production of calcium carbonate at room temperature with a uniform morphology and narrow particle size distribution, significantly reducing the carbonation time. The use of 3D printing for constructing bubbling reactors extends its applications beyond the production of CaCO3.
Article
Chemistry, Multidisciplinary
Xiang Li, Yanzhao Yang, Cristian Valenzuela, Xuan Zhang, Pan Xue, Yuan Liu, Changjun Liu, Ling Wang
Summary: Chameleonskin is naturally adaptive and can sense environmental changes and transform them into bioelectrical and optical signals. In this study, a bioinspired mechanochromic chiral nematic nanostructured film with good ionic conductivity was designed and fabricated by infiltrating fluorine-rich ionic liquids (FILs) into a swollen self-assembled cellulose nanocrystal (CNC) film. This film exhibited excellent mechanochromism, good ionic conductivity, and outstanding optical/electrical dual-signal sensing performance.
Article
Chemistry, Physical
Yinglun Liu, Pingji Ge, Yafei Li, Xingwu Zhai, Ke Lu, Xunxin Chen, Jueming Yang, Zongyuan Wang, Haiyang Zhang, Guixian Ge
Summary: In this paper, Fe-doped NiCoP catalyst is prepared by phosphating iron-doped NiCo Prussian blue analogs, showing excellent performance for electrocatalytic oxygen evolution reaction (OER) with low overpotential. The synergistic effect of Fe doping and phosphating reduces the energy barriers of key steps in OER, such as OH* dehydrogenation and OH adsorption. This work reveals the mechanism and provides a new strategy for synthesizing metal-doped transition metal phosphides.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yuxiang Yang, Chenyang Shen, Kaihang Sun, Donghai Mei, Chang-jun Liu
Summary: Nitrogen-doped In2O3 catalyst was prepared using a plasma-intensified nitrogen-doping technology, which effectively stabilized In2O3 and enhanced the surface charge localization. The doping of nitrogen inhibited over-reduction and excessive surface oxygen vacancies, resulting in improved CO2 dissociation and methanol selectivity. The N-In2O3 catalyst exhibited higher turnover frequency and methanol selectivity compared to un-doped In2O3.
Article
Engineering, Environmental
Jingsen Zhang, Yue Hua, Hong Li, Xiuling Zhang, Chuan Shi, Yuxiang Li, Lanbo Di, Zongyuan Wang
Summary: This study develops a high-performance Pt-free electrocatalyst for the electro-oxidation of methanol into high-value-added formate in alkaline media. The electrocatalyst, treated by an O-2 cold plasma, exhibits efficient formate electrosynthesis. Additionally, a coupled reaction system of methanol electro-oxidation and hydrogen evolution is established, further improving the energy conversion efficiency.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Shilong Xiong, Zhe Lu, Chenyang Shen, Chang-jun Liu
Summary: In this study, the addition of ZrO2 into Ru/In2O3 catalyst is found to improve the catalytic activity for CO2 hydrogenation to methanol. The Ru/In2O3-ZrO2 catalyst shows higher methanol selectivity and space-time yield compared to Ru/In2O3. The optimization of catalyst structure and hydrogen activation ability, as well as the improvement of methanol yield, are achieved through the addition of ZrO2.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Rui Zou, Kaihang Sun, Chenyang Shen, Chang-Jun Liu
Summary: The mechanism of methanol synthesis from CO2 hydrogenation on tungsten-doped In2O3 catalyst was investigated using DFT calculations. The introduction of tungsten increased electron density on oxygen vacancy, facilitating CO2 activation and promoting methanol synthesis. This study suggests that tungsten doping makes CO2 hydrogenation to methanol more efficient.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Kaihang Sun, Zhitao Zhang, Chenyang Shen, Ning Rui, Chang-jun Liu
Summary: The feasibility of indium oxide supported silver catalyst for CO2 hydrogenation to methanol was investigated using density functional theoretical (DFT) study and experimental investigation. The study revealed the intense Ag-In2O3 interaction which positively charged the silver species and facilitated the activation and dissociation of carbon dioxide. The experimental study confirmed the high methanol selectivity of the Ag/In2O3 catalyst and demonstrated its potential as an efficient catalyst for CO2 hydrogenation.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Engineering, Chemical
Zhe Lu, Jing Wang, Kaihang Sun, Shilong Xiong, Zhitao Zhang, Chang-jun Liu
Summary: This study demonstrates the high activity and selectivity of the In2O3-ZrO2 supported rhodium catalyst for CO2 hydrogenation to methanol. The use of ZrO2 optimizes and stabilizes the oxygen vacancies of In2O3, enhancing the adsorption and activation of CO2. Additionally, the highly dispersed rhodium catalyst improves the hydrogenation ability of the In2O3-ZrO2 support.
GREEN CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Teer Ba, Chenyang Shen, Xiaoshan Zhang, Chang-jun Liu
Summary: In this study, an edible gamma-cyclodextrin-metal-organic framework/RWR composite with macroscopic morphology was synthesized using rice wine residue (RWR) as the support. The obtained edible composite shows promising applications in drug delivery, adsorption, food processing, and other fields.
