Article
Chemistry, Physical
Jia Lin, Xiaohua Chen, Yong Zheng, Yihong Xiao, Ying Zheng, Lilong Jiang
Summary: Improving the sulfur resistance of palladium-based catalysts is essential for the sustainable and efficient combustion of methane. In this study, the surface properties of the catalysts were adjusted to regulate the behavior of sulfur species on the active sites and supports. The results showed that the accumulation of sulfur species in the catalysts increased linearly with the surface basicity and was restrained in catalysts with high surface acidity. The zirconium-doped alumina supported palladium catalyst exhibited moderate surface acidity/basicity and showed excellent catalytic activity in the presence of SO2 and after regeneration. The enhanced sulfur resistance was attributed to the interaction between supports and sulfur species, the decomposition of zirconium sulfates, the suppression of surface/bulk aluminum sulfates formation, and the effective regeneration of PdO phase. The establishment of a quantitative correlation between the accumulated sulfur species, surface acidity/basicity, and catalytic performance provides a pathway for the development of sulfur-resistant palladium-based catalysts for oxidation reactions.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Kaihui Li, Junyuan Xu, Huan Zhang, Lihua Zhu
Summary: In this study, Pd/WO3 catalysts with different Pd contents were prepared via sodium borohydride liquid phase reduction and used for phenol selective hydrogenation. The Pd/WO3-2 catalyst showed excellent catalytic performance with 92.9% conversion, 84.4% selectivity, and high TOF (349.1 h(-1)) under the reaction conditions.
Article
Engineering, Chemical
Xinhui Shen, Jiuxuan Zhang, Hong Jiang, Yan Du, Rizhi Chen
Summary: This study successfully prepared high-performance Pd@PC-COF catalysts by adjusting synthesis time to fabricate PC-COFs with high crystallinity, large specific surface area, abundant mesopores, and rich N element. The as-fabricated catalyst showed good catalytic performance and reusability for phenol hydrogenation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Katarzyna Swirk Da Costa, Paulina Summa, Dominik Wierzbicki, Monika Motak, Patrick Da Costa
Summary: In this study, a series of V-promoted hydrotalcite-derived nickel catalysts were tested for CO2 methanation, with Ni-I-V2.0 showing the highest catalytic activity at 2.0 wt% vanadium loading. XRD and XANES analyses revealed the smallest Ni0 particles in Ni-I-V2.0 and improved textural features, while CO2TPD showed the highest sum of weak and medium basic sites in Ni-I-V2.0 that can positively influence catalytic behavior.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Aliaksandr Karnitski, Jae-Wook Choi, Dong Jin Suh, Chun-Jae Yoo, Hyunjoo Lee, Kwang Ho Kim, Chang Soo Kim, Kyeongsu Kim, Jeong-Myeong Ha
Summary: This study investigates the depolymerization of concentrated kraft lignin and oak-extracted organosolv lignin promoted by supported bifunctional metal (palladium)-acid catalysts, and elucidates the roles of acid and metal sites. It provides valuable insights into the mechanism of catalytic lignin depolymerization and paves the way to the industrial-scale application of this process.
Article
Engineering, Environmental
Xiaowen Lu, Tingting Luo, Mingyang Zhang, J. Hugh Horton, Qiong Wu, Wei Wu, Man Qiao, Yu Wang, Zhijun Li
Summary: The size and geometry of supported metal ensembles are crucial in the design of effective heterogeneous catalysts. In this study, supported single atomic-layered, low-nuclearity palladium catalysts were created using an electronic and structural engineering strategy. These atomically dispersed Pd catalysts exhibited excellent catalytic activity in the hydrogenation of levulinic acid to 1,4-pentanediol, a reaction of importance for biomass conversion. Theoretical calculations revealed that the high catalytic activity was a result of cooperation between adjacent Pd atoms and strong electronic metal-support interactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Ekaterina S. Lokteva, Vera V. Shishova, Nikolay N. Tolkachev, Andrey N. Kharlanov, Konstantin I. Maslakov, Alexey O. Kamaev, Igor Yu. Kaplin, Irina N. Savina, Elena V. Golubina
Summary: By utilizing a mesoporous support based on silica and zirconia, monometallic and bimetallic catalysts were prepared and tested in the hydrodechlorination of 4-chlorophenol in aqueous solution. It was found that the bimetallic FePd/ZS catalyst exhibited excellent activity and stability, while the activation of Pd/ZS by aqueous phenol solution was identified through DRIFT spectroscopy analysis.
Article
Chemistry, Physical
Ho-Ryong Park, Beom-Jun Kim, Yeol-Lim Lee, Seon-Yong Ahn, Kyoung-Jin Kim, Ga-Ram Hong, Seong-Jin Yun, Byong-Hun Jeon, Jong Wook Bae, Hyun-Seog Roh
Summary: Research is actively conducted to improve carbon deposition and sintering resistance of Ni-based catalysts. Adding MgO in Ni/Al2O3 catalyst can result in improved performance, with the Ni/MgO-Al2O3 (MgO:Al2O3 = 3:7) catalyst showing the best catalytic performance among the prepared catalysts.
Article
Environmental Sciences
Ruixue Wang, Lin Du, Wenqiang Gao, Jianlong Li, Narcisse T. Tsona, Xiaofei Zhang, Xinming Hu, Wenxing Wang, Hong Liu
Summary: Heterostructured catalysts combining titanium dioxide nanobelts with palladium oxide nanoparticles exhibited enhanced photocatalytic activity for the degradation of phenol and methyl orange. PdO-C-NB showed the highest degradation efficiency among the four catalysts tested, with a 61% degradation rate for phenol within 90 minutes, nearly double that of using NB. The enhanced photocatalytic property of PdO-C-NB was attributed to its large specific surface area, abundant photocatalytic active sites, and low recombination rate of electron-hole pairs.
Article
Chemistry, Multidisciplinary
Yang Jiang, Qian Li, Xi Li, Xinyi Wang, Sen Dong, Jianhua Li, Li Hou, Tifeng Jiao, Yatao Wang, Faming Gao
Summary: This study successfully prepared three-dimensional network Pd-Ni bimetallic catalysts, which exhibited high conversion rate and selectivity for the hydrogenation of nitrobenzene at low temperature and normal pressure. The catalysts showed significant catalytic efficiency and recyclability even after 10 cycles, providing important theoretical basis and technical support for the preparation of low-cost, highly efficient catalysts.
Article
Chemistry, Physical
Tan Guo, Qing Guo, Shaozhong Li, Yongke Hu, Shan Yun, Yunhua Qian
Summary: This work investigates the effect of surface basicity on CO2 hydrogenation to methanol by preparing catalysts with different surface basicity. The results show that catalysts with strong surface basicity exhibit higher activity and selectivity, primarily through enhanced CO2 conversion and methanol selectivity.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Wojciech Gac, Witold Zawadzki, Marcin Kusmierz, Grzegorz Slowik, Wojciech Grudzinski
Summary: Two series of catalysts containing different amounts of neodymium were prepared by the impregnation method, using nano-CeO2 and gamma-Al2O3 as supports. Ceria supported nickel catalysts showed high activity in CO2 methanation reaction and weak activity changes were observed with an increase in Nd content. Complex changes in the nature of their redox and base centres were indicated by various characterizations.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Maray Ortega, Raydel Manrique, Romel Jimenez, Miriam Parreno, Marcelo E. Domine, Luis E. Arteaga-Perez
Summary: The production of renewable chemicals from lignocellulosic biomass has gained attention in green chemistry, particularly the synthesis of secondary amines from phenolics using Pd/C and Rh/C catalysts. The study revealed a multi-step mechanism involving hydrogenation, condensation, and hydrogenation steps, with the order of reactions and activation energies determined.
Article
Chemistry, Physical
Roudabeh Mohsseni Ahangar, Davood Farmanzadeh
Summary: This research investigates the adsorption behavior of aniline and phenol on pristine and Cu-doped phosphorene surfaces. The results show that the adsorption energy of aniline and phenol on pristine phosphorene surfaces are not typical for the chemisorption process, while the adsorption energy on the Cu-doped phosphorene surface could be in the chemisorption process range. The use of a Cu-doped phosphorene nanosheet could be an effective strategy to increase the adsorption energy and remove volatile organic compounds such as aniline and phenol.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Plaifa Hongmanorom, Jangam Ashok, Guanghui Zhang, Zhoufeng Bian, Ming Hui Wai, Yiqing Zeng, Shibo Xi, Armando Borgna, Sibudjing Kawi
Summary: Ni and Ni-Mg phyllosilicate mesoporous SBA-15 catalysts prepared via ammonia evaporation (AE) method exhibit superior catalytic performance in CO2 methanation compared to catalysts prepared via wetness impregnation (WI) method, due to enhanced metal-support interaction and weakly basic sites provided by surface hydroxyl groups. Incorporation of Mg into phyllosilicate structure increases medium basic sites, promoting monodentate formate formation and improving CO2 methanation activity. Additionally, the turnover frequency of CO2 conversion is correlated with the concentration of basic sites, and the strong metal-support interaction and confinement effect of SBA-15 can suppress metal sintering, ensuring good stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Biotechnology & Applied Microbiology
Mitta Harisekhar, Vanama Pavan Kumar, Samudrala Shanthi Priya, Komandur V. R. Chary
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2015)
Article
Chemistry, Physical
Harisekhar Mitta, Prem Kumar Seelam, Satu Ojala, Riitta L. Keiski, Putrakumar Balla
APPLIED CATALYSIS A-GENERAL
(2018)
Article
Chemistry, Physical
Ginjupalli Srinivasa Rao, N. Pethan Rajan, M. Hari Sekhar, S. Ammaji, Komandur V. R. Chary
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
(2014)
Article
Engineering, Chemical
Suresh Mutyala, Madhavi Jonnalagadda, Harisekhar Mitta, Raveendra Gundeboyina
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2019)
Article
Chemistry, Multidisciplinary
Harshitha Burri, Rumana Anjum, Ramesh Babu Gurram, Harisekhar Mitta, Suresh Mutyala, Madhavi Jonnalagadda
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2019)
Article
Chemistry, Applied
Harisekhar Mitta, Nagaraju Devunuri, Jyothi Sunkari, Suresh Mutyala, Putrakumar Balla, Vijayanand Perupogu
Summary: The study reported a series of copper-loaded magnesium-aluminum-gallium oxide catalysts prepared by wet impregnation method, where gallium was found to have significant effects on the final catalysts. The catalytic activity of copper was identified as crucial for glycerol hydrogenolysis, with lower copper loading showing higher selectivity to 1,2-propanediol due to highly dispersed particles and sufficient amount of basic and acido-basic sites. The optimized reaction conditions for glycerol conversion were systematically investigated, including copper loading, Mg/Al/Ga ratios, reaction temperature, hydrogen flow rate, glycerol concentration, and weight hourly space velocity, further establishing stability, reusability, and structure-activity correlation of the catalyst.
Article
Chemistry, Physical
Harisekhar Mitta, Vijayanand Perupogu, Rajender Boddula, Srinivasa Rao Ginjupalli, Inamuddin, Abdullah M. Asiri
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Multidisciplinary
Sateesh Kumar Beepala, Harisekhar Mitta, Hussain Sk, Putrakumar Balla, V. R. Chary Komandur
Summary: The reductive amination of cyclohexanol was studied using copper catalysts supported on mesoporous SBA-15 in the vapor phase. Among the catalysts tested, 5% Cu supported on SBA-15 showed the best catalytic performance with 36% selectivity towards cylclohexylamine at 80% cyclohexanol conversion under optimal reaction conditions. The characterization of the catalysts revealed the importance of active Cu sites, catalyst acidity, and reaction parameters in determining the catalytic properties.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Composites
Ramyakrishna Pothu, Naresh Mameda, Harisekhar Mitta, Rajender Boddula, Raveendra Gundeboyina, Vijayanand Perugopu, Ahmed Bahgat Radwan, Aboubakr M. Abdullah, Noora Al-Qahtani
Summary: This study presents a novel catalyst based on noble metal immobilization on functionalized zirconia for the production of biofuel alkyl levulinates from lignocellulosic biomass-derived levulinic acid under vapor-phase. Pt/STA-ZrO2 showed the highest catalytic activity, suggesting a promising approach for designing efficient catalysts for biofuels.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Srinivasarao Ginjupalli, Putrakumar Balla, Hussain Shaik, Nagaraju Nekkala, Bhanuchander Ponnala, Harishekar Mitta
NEW JOURNAL OF CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Suresh Mutyala, Sobhy M. Yakout, Shebl S. Ibrahim, Madhavi Jonnalagadda, Harisekhar Mitta
NEW JOURNAL OF CHEMISTRY
(2019)
Article
Multidisciplinary Sciences
Harisekhar Mitta, Prem Kumar Seelam, K. V. Raghava Chary, Suresh Mutyala, Rajender Boddula, Inamuddin, Abdullah M. Asiri
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)