Article
Chemistry, Physical
Tongfei Yang, Pengrong Ren, Xiangcheng Qi, Xin Wang, Qingnan Meng, Zhiyong Liu, Shu Yang
Summary: In this study, NaNbO3 powders were prepared using a hydrothermal method. The particle size of NaNbO3 decreased unexpectedly with increasing reaction temperature, indicating a nucleation-dominated growth mechanism. The sample reacted at 210 degrees C for 12 h showed the highest piezoelectric catalytic efficiency. The annealing of NaNbO3 powders in N2 increased the concentration of oxygen vacancy, as confirmed by impedance and XPS spectra. Simulation results showed that under the influence of oxygen vacancies, valence electrons of A-site Na cations on the surface were more easily excited to the conduction band compared to Nb cations, resulting in a more than 6 times increase in piezoelectric catalytic efficiency.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Mingchao Zhang, Xin Sui, Xin Zhang, Mang Niu, Cuiqing Li, Haiqin Wan, Zhen-An Qiao, Haijiao Xie, Xingyun Li
Summary: By using a mechano-chemical strategy with Na assisted milling, a multi-defective spinel catalyst D-NiCo2O4 was developed, which exhibited significantly elevated oxygen vacancies, raised active oxygen species, enhanced oxygen mobility, and increased specific surface area. This catalyst showed superb activity for propane catalytic oxidation, outperforming pristine NiCo2O4 and Co3O4 catalyst, making it one of the most outstanding non-noble metal catalysts for propane oxidation. This work set a paradigm for enhancing the VOCs oxidation performance of metal oxide catalyst by multi-defects engineering.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Zaiman Zhang, Hao Xu, Hao Li
Summary: Hydrodeoxygenation in aqueous phase is a green and efficient approach for converting biomass and its derivatives into high value-added chemicals and renewable fuels. In this study, Ni/T-Nb2O5 catalyst with the highest concentration of oxygen vacancies (Ov) exhibited excellent hydrodeoxygenation performance. The synergistic effect between Ov and water promoted the hydrodeoxygenation of vanillin in aqueous phase, achieving a high yield of 2-methoxy-4-methylphenol (MMP).
Article
Engineering, Electrical & Electronic
R. R. Jalolov, Sh Z. Urolov, Z. Sh Shaymardanov, S. S. Kurbanov, B. N. Rustamova
Summary: The photoluminescence studies of ZnO nanorods synthesized under high-temperature vapor-phase transport method revealed the presence of emission bands centered at 387 nm and 389 nm, with the latter potentially associated with zinc vacancy defects or their complexes. The intensity dependence of these emission bands exhibited different behaviors, with the band at 389 nm showing a threshold behavior and the band at 395 nm growing linearly with excitation intensity.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Vienna Wong, Xiaoran Zheng, Yue Jiang, Sajjad S. Mofarah, Charles C. Sorrell, Pramod Koshy
Summary: A template-free method was used to fabricate undoped, Cr-doped, and S-doped mesoporous ceria nanostructures. The optimal ratio of cerium coordination polymer to triethanolamine (TEA) for exfoliation was determined to be 30 mg:0.35 mL. The introduction of dopants and heterojunction formation resulted in defects and improved photocatalytic performance. Cr-doped CeO2-x showed the highest photocatalytic performance, while S-doped CeO2-x exhibited lower performance due to reduced porosity from microstructural densification.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Engineering, Environmental
Wuziyue Shen, Libin Yang, Zhe Zhou, Haiping Gao, Xuefei Zhou, Yalei Zhang, Jiabin Chen
Summary: This study utilizes carbon nanotubes to activate peracetic acid for efficient degradation of phenol. The research identifies organic radicals as the main reactive species in the reaction process. Modified carbon nanotubes with higher lattice defects exhibit better catalytic activity, and the double-vacancy defects play a major role in the adsorption and activation process of peracetic acid. Additionally, the initial pH and the presence of humic acid strongly affect the degradation of phenol in the CNTs/PAA system.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Lijun He, Yan Zhang, Yuchao Zang, Caixia Liu, Weichao Wang, Rui Han, Na Ji, Shuting Zhang, Qingling Liu
Summary: By modifying the active sites in the La-Ag-Co perovskite catalyst, the catalytic performance was improved, with the formation of active oxygen vacancies. There is synergy between the oxygen vacancies and metal sites, enhancing the catalytic efficiency of the catalyst.
Article
Materials Science, Ceramics
Adnan Younis, Aicha Loucif
Summary: This study focused on the effect of Fe doping on ceria nanorods, showcasing the superior photocatalytic activity and humidity sensing capabilities of Ce0.9Fe0.1O2 compared to undoped samples. The results provide insights into the role of oxygen vacancies in tailoring the structural and optical properties of CeO2 nanorods for environmental and sensing applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Cameron L. Bentley, Lachlan F. Gaudin, Minkyung Kang
Summary: Local voltammetric analysis with a scanning electrochemical droplet cell technique, in combination with a new data processing protocol, is used to directly identify previously unseen regions of elevated electrocatalytic activity on the basal plane of molybdenum disulfide. Understanding the nature of these microscopic catalytic active sites is crucial for the rational design of renewable fuel production materials.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yan Zhang, Min Zhang, Meng Wang, Caixia Liu, Qingling Liu, Weichao Wang, Ziyin Zhang, Rui Han, Na Ji
Summary: Traditional catalyst design relies on trial-and-error experiments, but we have developed a new strategy to evaluate catalyst performance using computational methods, which has been validated by experiments. Ce doping significantly enhances the catalytic activity of the catalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lei Wu, Jiaren Wang, Chenyu Yang, Xingmin Gao, Yan Fang, Xiaoning Wang, Winston Duo Wu, Zhangxiong Wu
Summary: This work investigated the relationship between the properties and activities of ceria (CeO2) in heterogeneous catalytic ozonation (HCO) and identified the key descriptor from various properties. CeO2 nanorods calcined at different temperatures were used in HCO for degrading organic pollutants. The study revealed linear relationships between the density of Frenkel-type oxygen vacancy (OV) and the rates of O3 decomposition and total organic carbon (TOC) removal. The research proposed a mechanism for reactive oxygen species (ROS) generation and pollutant degradation. This study contributes to the design of efficient catalysts for treating organic pollutants in wastewaters.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Hang Li, Guan-Ze Chen, Chuan-De Wu
Summary: A porous metal silicate (PMS) material, PMS-36, exhibits high efficiency and stability in catalyzing the hydrodeoxygenation transformation of lignin-derived phenols to naphthenes under mild conditions.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Weilu Wang, Xudong Gong, Fang Wang, Xinyi Wei, Yanliu Dang, Yun Wu, Xianming Zhang
Summary: Ce-doped LaBO3 and its incorporation with 3d transition metals have shown great potential in eliminating propane. The addition of transition metals promotes the density of oxygen vacancies, enhancing the reduction and acidity of the material. This leads to a high conversion rate of propane.
Article
Chemistry, Physical
Xiaotong Wang, Yanling Sun, Mingyang Li, Wanlu Zhang, Yujun Zhu
Summary: In this study, OMS-2 was modified by adding different amounts of K via a hydrothermal process to obtain samples with unique hierarchical porous structures. The results showed that the sample with an appropriate amount of K exhibited the best catalytic oxidation performance on toluene and benzene, surpassing the conventional OMS-2.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Chemical
Tianjian Zhao, Fushuai Xu, Shaobo Chen, Zhongjun Xu, Dan Yu
Summary: In this study, Mn/Ce oxide nanorods were prepared as catalysts and subjected to vacuum deoxidation to enhance oxygen vacancies for efficient catalytic ozonation of p-xylene. The vacuum-deoxidated Mn0.5Ce0.5Ox catalyst showed the optimal structure and performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Bowen Du, Xiao Chen, Yu Ling, Tiantian Niu, Weixiang Guan, Jipeng Meng, Haoquan Hu, Chi-Wing Tsang, Changhai Liang
Summary: This study achieves the catalytic hydrogenolysis-isomerization of nondegradable polyolefin plastic waste to high-value fuels and lubricants using a bifunctional Rh/Nb2O5 catalyst. The high efficiency of metallic Rh active sites enhances the dehydrogenation/hydrogenation reactions of polyolefins, while the strong Bronsted acidity of Nb2O5 promotes the cleavage of C-C bonds and skeletal rearrangements. The technology shows promise in advancing the transition to a circular plastics economy for sustainable development.
Article
Chemistry, Physical
Jiaxin Liu, Chuang Li, Hongyu Niu, Changhai Liang
Summary: Transfer hydrogenation of carbonates using glucose to produce formates and gluconates is an attractive pathway for valorising waste streams. The investigation reveals a cooperative catalytic mechanism and composition-dependent behaviour of PtxPdy/CNTs catalysts. Insights into the mechanism will allow transfer hydrogenation of carbonates at room temperature to be widely utilized.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yan Du, Xiao Chen, Changhai Liang
Summary: The electrocatalytic hydrogenation (ECH) of biomass feedstocks is a promising alternative for thermal upgrading bio-oil. Pt, Ru, Pt3Ru, Pt3Sn, Ru3Sn, and Pt3RuSn supported on carbon cloth (CC) were synthesized and evaluated for the ECH performance of phenol to cyclohexanol. The synergistic effect of bimetallic Pt and Ru, along with the addition of Sn, resulted in high catalytic activity of Pt3RuSn/CC with minimal cyclohexanone formation.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Tao Wang, Yuan Cheng, Hongyu Niu, Shaojie Li, Jingjie Luo, Changhai Liang
Summary: The catalytic transfer hydrogenation of furfural to 2-methylfuran using isopropanol and sol-gel derived CuZn/FeOx catalysts was investigated. Characterization studies revealed the presence of surface-rich Cu-0 and Cu+ species in the sol-gel derived samples, due to the co-reduction of homogeneous ternary compositions. The synthesis method and pre-reduction regulated the active copper sites and surface acid sites, determining the selectivity and performance of the catalyst. The superior performance of the CuZn/FeOx catalyst can be attributed to the ternary synergy induced by the sol-gel method. The final yield of 2-methyl furan reached 91% using Cu/FeOx(280) at 210℃ with a fast reaction rate of 8.6 μmol(2-MF)g(Cu)(-1)s(-1).
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Nanoscience & Nanotechnology
Nannan Zhang, Shiyao Liu, Jipeng Meng, Marc Armbruester, Xiao Chen, Changhai Liang
Summary: High-entropy alloys (HEAs) show remarkable catalytic performance in various reactions, but their synthesis with controlled structures remains a challenge. This study successfully prepared ultrasmall PtFeCoNiCu HEA nanoparticles supported on carbon nanotubes (CNTs) through a lithium naphthalenide-driven reduction method. The supported PtFeCoNiCu/CNT catalyst exhibited high catalytic activity, selectivity, low activation energy, and excellent stability in the hydrogenation reaction of maleic anhydride to succinic acid. Moreover, the mass-specific activity of Pt in this catalyst was much higher than that of Pt/CNT. This work provides strong support for HEAs as advanced heterogeneous catalysts and promotes further research and application in selective hydrogenation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Jingjie Luo, Yixue Zhou, Sihan Yang, Wenjun Zhu, Shaojie Li, Changhai Liang
Summary: Bimetallic AuxPdy/CNT samples supported by carbon nanotubes were prepared using in situ colloid immobilization. These samples efficiently transformed benzyl alcohol to benzaldehyde in alkali-free mild conditions, with a high TOF of 1274 h-1.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Chenxi Zhao, Jiequan Wang, Xiao Chen, Changhai Liang
Summary: Highly efficient Ni-Mo bimetallic nitrides catalysts were prepared for the hydrodeoxygenation of methyl palmitate. The Ni2Mo3N catalyst showed the best activity and selectivity, outperforming Ni3Mo3N and Mo2N catalysts. The introduction of nickel into the Mo2N lattice enhanced the catalytic performance in biomass oil conversion.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Engineering, Chemical
Yanbo Sun, Jia Li, Yan Du, Hongyu Niu, Chuang Li, Changhai Liang
Summary: In this work, a series of ultrauniform Ru nanoclusters supported by gamma-Al2O3 are synthesized for the hydrogenation of diisononyl phthalate (DINP). The conversion of DINP and the selectivity of diisononyl-cyclohexane-1,2-dicarboxylate (DINCH) both reach 100% under specific conditions. Furthermore, a hydrogenation reaction network of DINP is constructed, and the alkali metal ions adsorbed on the surface of Ru nanoclusters prepared by the polyol method are found to affect the hydrogenation activity of the catalyst.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Zongxuan Bai, Xiao Chen, Changhai Liang
Summary: The catalytic hydrogenation of unsaturated bonds in petroleum resin is a promising way to improve its properties. However, the presence of sulfur compounds in petroleum resin presents a great challenge to hydrogenation catalysts. In this study, PdNi bimetallic catalysts were prepared and applied in the hydrogenation of DCPD petroleum resin, demonstrating higher sulfur tolerance compared to monometallic catalysts. The enhanced catalytic performance of the Pd1Ni1-MgAlO-HT catalyst can be attributed to small particle size, high dispersion of metal particles, and the synergy effect between Pd and Ni species. This research will guide the design of efficient sulfur tolerance catalysts for polymer hydrogenation derived from hydrotalcite-like precursors.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Yu Ling, Xiao Chen, Jipeng Meng, Chennan Wang, Chuang Li, Adam H. Clark, Bowen Du, Changhai Liang
Summary: Propylene oligomerization over high-loading Ni/Beta catalysts is improved by regulating the coordination environment of nickel species using mechanochemistry. The ball-milled catalyst with four-coordinated nickel species exhibits higher activity than the traditional impregnated catalyst. Mechanochemistry enhances the metal-support interaction and boosts the adsorption and activation of propylene.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Tianyun Cui, Yu Ling, Jipeng Meng, Ke Li, Changhai Liang, Chuang Li
Summary: The rational design of high-performance catalysts with resistance to metal leaching is a major challenge in the hydrogenation of nitrile butadiene rubber. This study demonstrates that the Pd-Pt bimetallic alloy nanocatalyst exhibits outstanding hydrogenation and selectivity, thanks to electron transfer and the formation of uniformly dispersed nanoparticles. The incorporation of inactive Pt species enhances metal-support interaction, reducing residual metal content in the rubber. This research provides a simple procedure for designing efficient bimetallic catalysts for the hydrogenation of unsaturated elastomer.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Bairui Guo, Zhongtian Du, Xiaoyu Shen, Mengjing Han, Yanbin Zhao, Jingjie Luo, Changhai Liang
Summary: Co-N-C catalysts were prepared by pyrolysis at 250-400°C for efficient oxidation of mono-phenols. 2,3,6-Trimethylphenol could be easily oxidized into 2,3,5-trimethyl-1,4-benzoquinone with dioxygen. Catalytic activity was not observed in CoO, Co3O4, or metallic Co particles, indicating that active Co(ii) species with N/O coordination dispersed on disordered carbonaceous materials.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Energy & Fuels
Chenxi Zhao, Wenjun Zhu, Changhai Liang
Summary: This study investigates the influence of different crystalline ZrO2 supports on the catalytic performance of NiMo/ZrO2 catalyst for hydrodeoxygenation. Monoclinic ZrO2 is found to exhibit better catalytic activity and selectivity. NiMo/m-ZrO2 shows higher hydrogenation conversion and liquid alkanes selectivity, as well as excellent catalytic stability.
Article
Chemistry, Physical
Jie Huang, Wenhao Yang, Sen Zhang, Jingjie Luo, Changhai Liang
Summary: In this work, a series of Co@C-CNTx catalysts were synthesized using CNT promotion to enhance the carbon skeleton derived from ZIF-67. The addition of CNT led to improved crystallization of the active Co centers and modified the surface composition of the Co@C-CNTx catalysts. The strong Co-carbon interaction formed via Co-N coordination resulted in enhanced HMDA yield. Furthermore, the change in ethanol contact angle on the catalyst surface improved mass transfer and diffusion of the reaction liquid. The suppression of cobalt site oxidation was found to be crucial for fast reaction rates.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Wenjun Zhu, Yao Li, Chenxi Zhao, Jingjie Luo, Yanbo Sun, Changhai Liang
Summary: Constructing effective and stable non-noble metal catalysts is significant for catalytic oxidation of stable light alkanes at low temperature. CoAlO oxide catalysts derived from CoAl layered double hydroxides (LDHs) intercalated with different anions were prepared and their catalytic performances for propane oxidation were investigated. The CoAlO-Ac-3 catalyst (CH3COO- anion intercalation) showed the best catalytic activity, stability, and water resistance for propane oxidation, with high reaction rate and TOF value. The results suggest that interlayer anions affect the valence distribution of metals and surface active oxygen species, and lattice distortion caused by interlayer anions promotes the migration of active oxygen species, enhancing propane adsorption and activation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zi-Ye Liu, Qian-Yu Wang, Ji-Ming Hu
Summary: In this study, a layered carbon dot composite catalyst (NiFe LDH@CDs) was prepared using a one-step coprecipitation method, without the need for heating or hydrothermal treatment. The CD-functionalized catalyst facilitated rapid charge transfer and accelerated the oxygen evolution reaction. Additionally, the heterojunction structure formed between NiFe LDH and CDs efficiently suppressed photoelectron-hole recombination.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Rohit Kumar, Ankit Kumar Srivastava, Palaniyappan Nagarasu, Vedichi Madhu, Ekambaram Balaraman
Summary: We designed and synthesized a NN-CoII bidentate complex and used it for the amination of alcohols under mild and solventless conditions. The complex exhibited good reactivity towards both primary and sterically hindered secondary alcohols, providing high yields of amines. The pyrazole moiety in the ligand played a crucial role in the reaction. Furthermore, we demonstrated the reusability of the complex as a homogeneous cobalt catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shivanand Chettri, Liang-Ting Wu, Sagarmani Rasaily, Debesh Sharma, Bikram Gurung, Rajani Dewan, Sudarsan Tamang, Jyh-Chiang Jiang, Anand Pariyar
Summary: Replicating the enzymatic surface microenvironment in vitro is challenging, but constructing an analogous model could facilitate our understanding of surface effects and aid in developing an efficient bioinspired catalytic system. In this study, five unique Cu2O morphologies were generated, and the surface morphology variations were found to be a consequence of differences in the exposure of low-index facets. The reactivity of Cu2O was found to be influenced by the proportion of {110} planes, with r-Cu2O exhibiting the highest reactivity.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Yong Tang, Jianhao Qiu, Dingliang Dai, Guanglu Xia, Lu Zhang, Jianfeng Yao
Summary: Defect engineering has been shown to improve the photocatalytic performance. This study investigated the use of defect-rich UiO-66-NH2 wrapped by ZnIn2S4 as a catalyst for photocatalytic H2O2 production. The defects in UiO-66-NH2 enhanced O-2 adsorption and charge separation, leading to higher H2O2 yield. The insights from this work can advance the research in defect engineering of MOFs and photocatalytic H2O2 synthesis.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Ruiyang Qu, Shuxin Mao, Jana Weiss, Vita A. Kondratenko, Evgenii V. Kondratenko, Stephan Bartling, Haifeng Qi, Annette-Enrica Surkus, Kathrin Junge, Matthias Beller
Summary: The hydrogenation of amides, a challenging reaction usually performed at high temperatures, has been achieved under milder conditions using a new Pt-MoOx/TiO2 catalyst. This catalyst system enables the selective hydrogenation of various amides and imides.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Xiaoran Niu, Ao Wang, Lei Tong, Lei Wang, Yuan Kong, Chenliang Su, Hai-Wei Liang
Summary: This study introduces a novel intermetallic PdCu3 catalyst supported on defective nanodiamond-graphene (ND@G), which exhibits high selectivity (95%) and remarkable activity (turnover frequency: 2940 h(-1)), six times higher than that of the commercial Lindlar catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Review
Chemistry, Physical
Zhiyuan Zheng, Yiming Yue, Hongying Zhuo, Qinggang Liu, Yanqiang Huang
Summary: This review presents the recent research advances on single-atom catalysis for deep reduction of CO2. Detailed introductions and summaries were classified into three categories based on proton-coupled multi-electron transfer approaches: strengthening metal-support interaction, rational design and regulation of coordination environment, and development of SACs with multi-atom active sites. The challenges and future research directions in the field of SACs for CO2 reduction are also proposed.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shiv Kumar, Paramita Datta, Anup Bhunia, Swadhin K. Mandal
Summary: This article reports a transition-metal-free process for in situ denitrogenation of tosylhydrazones, resulting in the production of various sulfones. The authors used a phenalenyl-based odd alternant hydrocarbon as a photoredox catalyst, which acted as a potent oxidant to facilitate the denitrogenation reaction. The method showed wide functional-group tolerance and high yields, making it suitable for late-stage modification of natural products.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
L. A. Luque-Alvarez, J. Gonzalez-Arias, F. Romero-Sarria, T. R. Reina, L. F. Bobadilla, J. A. Odriozola
Summary: Currently, the production of acetic acid through the carbonylation reaction of methanol has limitations, leading to the exploration of alternative methods using heterogeneous catalysts. This study investigates the methanol carbonylation reaction over a Cu-H-MOR catalyst and proposes a reaction mechanism based on the catalytic behavior and performance of the catalyst. The results provide insights into the reaction mechanism and the involvement of acid and redox centers.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)