Article
Multidisciplinary Sciences
Lina Chong, Guoping Gao, Jianguo Wen, Haixia Li, Haiping Xu, Zach Green, Joshua D. Sugar, A. Jeremy Kropf, Wenqian Xu, Xiao-Min Lin, Hui Xu, Lin-Wang Wang, Di-Jia Liu
Summary: The discovery of a nanofibrous cobalt spinel catalyst codoped with lanthanum and manganese provides a promising alternative to iridium for the oxygen evolution reaction (OER) in proton exchange membrane water electrolyzers (PEMWE) and reduces the cost of green hydrogen production. The catalyst demonstrates low overpotential and degradation, making it suitable for long-term use in acidic electrolyte. A PEMWE utilizing this catalyst at the anode achieves high current density and shows low degradation in accelerated stress tests.
Article
Chemistry, Physical
Gamze Atalmis, Serkan Toros, Bora Timurkutluk, Yuksel Kaplan
Summary: The storage of hydrogen in metal hydride reactors is examined experimentally and numerically, and the thermal properties and temperature distribution in the reactor are improved by coating the storage material with copper. The charging time is also reduced.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Electrochemistry
Malo Duportal, Abdelali Oudriss, Catherine Savall, Alexis Renaud, Christine Labrugere-Sarroste, Xavier Feaugas
Summary: The influence of hydrogen on the corrosion behavior of AISI 316 L austenitic stainless steel in borate buffer solution was investigated. The results showed that hydrogen absorption significantly increased the surface reactivity, mainly due to the presence of mobile hydrogen. However, hydrogen had little effect on the composition and thickness of the passive layer, but it led to an increase in the dissolution rate. These findings are important for understanding the impact of hydrogen on the corrosion behavior of stainless steel.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Christos Papadopoulos, Konstantinos Kappis, Joan Papavasiliou, John Vakros, Aspasia Antonelou, Wojciech Gac, Haibin Li, George Avgouropoulos
Summary: CuCe mixed oxides are commonly used for preferential CO oxidation in the purification of hydrogen-rich gas stream. This study investigated the synthesis of various ceria supports and the preparation of CuCe mixed-oxide catalysts. It found that modifying the hydrothermal parameters can tune the properties of the supports, leading to highly active and selective catalysts. The nature of the reduced copper species and the optimum content in oxygen vacancies play crucial roles in the catalytic performance.
Article
Chemistry, Physical
Dong-Yang Li, Yu-Ming Sun, Xing-Yu Wang, Nan-Nan Wang, Xiao-Yang Zhang, Cheng-Yang Yue, Xiao-Wu Lei
Summary: Scientists propose a new photon combining strategy to achieve highly efficient broadband white-light emission in zero-dimensional indium halides, addressing the toxicity of lead perovskites and the limited photoluminescence quantum yield.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Tong Wu, Khashayar Rajabimoghadam, Ankita Puri, David D. Hebert, Yi Lin Qiu, Sidney Eichelberger, Maxime A. Siegler, Marcel Swart, Michael P. Hendrich, Isaac Garcia-Bosch
Summary: In this research article, a 4H(+)/4e(-) electron-coupled-proton buffer (ECPB) based on Cu and a redox-active ligand is described. The ECPB system catalyzes both the reduction of O-2 to H2O and the dehydrogenation of organic substrates. Mechanistic analysis reveals that fast disproportionation reactions maintain the ECPB equilibrium.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
Xian-Wei Lv, Qing-Hui Kong, Xin-Lian Song, Yu-Ping Liu, Zhong-Yong Yuan
Summary: In this study, copper selenide nanoflakes were synthesized on copper foam and exhibited bifunctional catalytic activity for hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR). The high copper deficiencies in the Cu2-xSe phase contributed to faster electron transfers and the Cu2Se berzelianite phase played a role in long-term electrocatalytic stability. The catalysts showed potential for electrocatalytic hydrazine-assisted overall water splitting.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Morten Weiss, Roland Marschall
Summary: We thoroughly investigated copper niobium oxides and synthesized six different phase-pure and highly crystalline oxides. These materials have small band gaps and can absorb visible light, making them promising for semiconductor photocatalysis. They also have better chemical stability compared to binary copper oxides.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Multidisciplinary Sciences
Guohong Wang, Minghang Li, Jianxi Liu, Fang Ye, Laifei Cheng, Xiaomeng Fan, Xingmin Liu, Ralf Riedel
Summary: In this research, natural antioxidants were used to protect Ti3C2Tx MXene from degradation, aiming to achieve long-term stability of the EMI shielding performance. The results showed that the composites of antioxidants and Ti3C2Tx exhibited a decelerated degradation rate and improved stability of the shielding effectiveness. The study provides a foundation for the further development of stable MXene applications in the electromagnetic field.
Article
Chemistry, Multidisciplinary
Xiaomei Xu, Qingqing An, Hao Sun, Yongchun Wang, Wenhui Shang, Lixia Bao, Zhiyu Jia, Qiang Zhang
Summary: This study focuses on developing efficient and low-cost oxygen evolution reaction (OER) catalysts, utilizing ethylene glycol to synthesize a Cu2O-rGO composite. The material changes the OER process under alkaline conditions, showing promising electrocatalytic oxygen generation performance. Investigating the mechanism of this catalyst will guide the synthesis of novel non-noble-metal catalysts for applications in energy and the environment.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Chang Cheng, Jianjun Zhang, Bicheng Zhu, Guijie Liang, Liuyang Zhang, Jiaguo Yu
Summary: The S-scheme heterojunction is a promising photocatalyst that achieves separated charge carriers and sufficient redox ability. By constructing a series of CdS/PADT heterojunctions and using femtosecond transient absorption spectroscopy, an interfacial charge-transfer signal was detected, providing solid evidence for S-scheme charge transfer. The lifetime for interfacial charge transfer was calculated to be approximately 78.6 ps. Additionally, the S-scheme heterojunction photocatalysts exhibited higher photocatalytic conversion of 1,2-diols and H2 production rates compared to bare CdS.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
N. A. Chumakova, Yu. N. Kozlov, A. A. Shubin, A. G. Tskhovrebov, V. N. Khrustalev, A. I. Kokorin
Summary: The structure of Cu(II) complex with chelating fluorinated ligands was investigated using CW X-band electron paramagnetic resonance (EPR) spectroscopy and density functional theory (DFT) at temperatures of 298 K and 90 K. The spin-Hamiltonian and structural parameters were determined and compared with X-ray data, showing good similarity. In addition, the catalytic behavior of the Cu(II) complex during H2O2 decomposition in acetonitrile-aqueous solutions at 313 K was qualitatively studied using EPR and UV-visible spectroscopy.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Engineering, Environmental
Jiuyu Chen, Aotian Gu, Elvis Djam Miensah, Ying Liu, Peng Wang, Ping Mao, Chunhui Gong, Yan Jiao, Kai Chen, Yi Yang
Summary: Researchers have proposed an efficient technique for the elimination of iodide using nanowhisker zero-valent copper decorated with zinc oxide nanocomposites, which showed high adsorption capacity, selectivity, resistance to acidity, and reusability.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Simon De Kreijger, Benjamin Elias, Ludovic Troian-Gautier
Summary: Two iridium(III) binuclear photosensitizers were investigated for the photooxidation of iodide, bromide, and chloride. The excited states of the photosensitizers were efficiently quenched by the halides, and evidence of reductive excited-state electron transfer was found in solvent mixtures containing water.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Shunqin Luo, Hui Song, Fumihiko Ichihara, Mitsutake Oshikiri, Wenning Lu, Dai-Ming Tang, Sijie Li, Yunxiang Li, Yifan Li, Philo Davin, Tetsuya Kako, Huiwen Lin, Jinhua Ye
Summary: In this study, a light activation strategy was demonstrated to regulate the dynamic restructuring of Cu active sites in a TiO2-supported Cu catalyst during low-temperature methanol steam reforming. The thermally deactivated Cu/TiO2 underwent structural restoration from Cu2O to metallic Cu under illumination, leading to significantly enhanced activity and stability. The optimized Cu/TiO2 exhibited a high H-2 production rate under low-intensity solar irradiation, outperforming conventional photocatalytic and thermocatalytic processes. The results suggest the feasibility of real-time functionalization of catalysts through the strong light-matter-reactant interaction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Editorial Material
Materials Science, Multidisciplinary
G. Hultquist, M. J. Graham, J. L. Smialek, O. Kodra
Article
Electrochemistry
Lik Ming Aw, Roberta Amendola, John W. Ryter, Madisen W. McCleary, Paul E. Gannon, McLain E. Leonard, James L. Smialek
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2017)
Article
Materials Science, Ceramics
James L. Smialek
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2017)
Article
Materials Science, Multidisciplinary
James L. Smialek
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2018)
Article
Nanoscience & Nanotechnology
J. L. Smialek, J. A. Nesbitt, T. P. Gabb, A. Garg, R. A. Miller
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2018)
Article
Metallurgy & Metallurgical Engineering
James L. Smialek, Simon Gray
OXIDATION OF METALS
(2018)
Editorial Material
Materials Science, Multidisciplinary
James L. Smialek, Robert A. Miller
Article
Chemistry, Physical
James L. Smialek, Simon Gray
Article
Materials Science, Multidisciplinary
James L. Smialek
Article
Materials Science, Ceramics
James L. Smialek, Michael D. Cuy, Bryan J. Harder, Anita Garg, Richard B. Rogers
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Crystallography
James Smialek
Summary: Low-sulfur single-crystal Ni-base superalloys show excellent cyclic oxidation resistance due to improved Al2O3 scale adhesion, which is achieved by preventing deleterious interfacial sulfur segregation at common ppm levels of S impurity. Multiple hydrogen-annealing desulfurization treatments were used to demonstrate the importance of low sulfur content, with maximum adhesion achieved at <= 0.3 ppmw S and significant spallation above 2 ppmw.
Article
Materials Science, Multidisciplinary
James L. Smialek
Summary: Hydrogen annealing was used to desulfurize Ni-superalloy PWA 1480 at various temperatures, times, and sample thicknesses. The residual sulfur predicted by diffusion solution was generally in agreement with the published sulfur diffusivity, but divergences were observed at low temperatures or extreme values of the diffusion parameter D(S)t/L-2, suggesting limitations in the process.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Tom Sanviemvongsak, Daniel Monceau, Martin Madelain, Clara Desgranges, James Smialek, Bruno Macquaire
Summary: The study compared the cyclic oxidation resistance at 900 degrees C of the alloy 718 produced by laser beam melting and electron beam melting with that of the wrought-718 alloy, revealing significant differences in the rate of oxide layer spallation and the adhesion of the oxide scale. Standard heat treatment and surface grinding may slightly delay the catastrophic spallation. Additionally, the quantitative discussion on the role of sulfur and manganese on the adhesion of the oxide scale was conducted using thermodynamic modelling.
Review
Metallurgy & Metallurgical Engineering
James L. Smialek
Summary: This article reviews key factors related to protective alumina scale adhesion and highlights critical experiments. Different mechanisms are discussed and the chemical bond explanation is found to be the most plausible. Control of sulfur segregation is essential for scale adhesion. The principles presented in this article are consistent with both historical and recent industrial successes.
OXIDATION OF METALS
(2022)
Article
Crystallography
James L. Smialek, Anita Garg, Bryan J. Harder, Michael D. Cuy
Summary: A FIB/STEM interfacial study was conducted on a TBC/Ti2AlC MAX phase system after it underwent aggressive burner rig testing. The study characterized the 7YSZ TBC, alpha-Al2O3 TGO, and MAXthal 211(TM) Ti2AlC base using various techniques such as TEM/STEM, EDS, SADP, and HRTEM. The results revealed clean and faulty YSZ grains, a duplex alpha-Al2O3 structure for the TGO, and a Ti2AlC substrate with basalse plane faults. These findings support previous research demonstrating the durability of the YSZ/Ti2AlC MAX phase system.
Article
Materials Science, Multidisciplinary
Zhichao Shang, Xiaoping Cai, Farshid Pahlevani, Yan Zheng, Akbar Hojjati-Najafabadi, Xinran Gao, Baojing Zhang, Peizhong Feng
Summary: High porosity Co-Al-Fe intermetallics with 3D-microstructures were successfully synthesized in one step via a thermal explosion reaction. The link between pore structure and permeability was investigated using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was studied at 900 degrees C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the samples maintained stable pore structure and intact internal matrices, attributed to the formation of a thin protective layer on the surface. In addition, inward diffusion of S resulted in the formation of FeS nodules.
Article
Materials Science, Multidisciplinary
Lian Ma, Hain Yang, Daquan Zhang, Wei Wu
Summary: In this study, an environmentally friendly volatile corrosion inhibitor, lysine salts (LA), was prepared between graphene oxide (GO) layers using an in situ intercalation technique. The corrosion inhibition effect of LA was evaluated, and it was found that LA-GO2 achieved a 99.3% corrosion inhibition efficiency after composition optimization. The inhibition of the electrochemical anodic process on the surface of mild steel was the main reason for the high corrosion inhibition efficiency of LA-GO2. The properties of the surface film on the corroded steel were also characterized in detail to understand the corrosion inhibition mechanism of LA-GO2.
Article
Materials Science, Multidisciplinary
Running Wang, Jiaping Zhang, Bing Liu, Jie Fei, Qiangang Fu
Summary: By introducing a tailored SiC-C interphase, the carbon fiber can be effectively protected, improving the mechanical and ablation properties of leading edge shaped C/C-ZrC-SiC composites.
Article
Materials Science, Multidisciplinary
Zihua Wang, Chijia Wang, Ruitao Wang, Jiapeng Deng, Kun Zhang, Yanji Zhu, Huaiyuan Wang
Summary: A robust anti-corrosive coating has been developed using functional fly ash, which demonstrates excellent corrosion resistance and improved mechanical properties. The coating achieves these enhancements through molecular cross-linking design and surface augmentation techniques, resulting in a significantly improved impedance modulus compared to pure polyurea coatings.
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
Article
Materials Science, Multidisciplinary
Yang Li, Ke Ma, Jingjun Xu, Jingjing Li, Yueming Li, Yi Zhang, Jun Zuo, Meishuan Li
Summary: Cr2AlC diffusion barrier effectively blocks the diffusion of Ti, enhancing the stability and spalling resistance of the Al2O3 scales between NiCrAlY coating and TiAl alloy.
Article
Materials Science, Multidisciplinary
Weiyi Wang, Qinglin Pan, Xiangdong Wang, Bing Liu
Summary: By adding Ce, Sc, Y and Zr elements to Al-Mg-Si alloy, the microstructure of the alloy can be regulated, and the corrosion and heat resistance of the materials can be improved.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Javier Izquierdo, Ricardo M. Souto, Flavio Deflorian, Michele Fedel, Stefano Rossi
Summary: This study presents a new approach to studying the mechanism of filiform corrosion in organic coated steel using the scanning vibrating electrode technique (SVET) and micropotentiometry (potentiometric SECM). The electrochemical activity under the coating was evaluated by mapping the ionic current densities coming from artificial defects made in specific locations of the filament. Antimony tips were also used to investigate the pH changes associated with different corrosion reactions at the metal-paint interface. Local pH levels along the filament in the anodic and cathodic regions were determined.
Article
Materials Science, Multidisciplinary
Yang Gao, Dayun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
Summary: The corrosion characteristics of a novel alumina-forming austenitic steel in high-pressure high-temperature water environment were studied. The addition of aluminum has a negative effect on the continuity of the alumina scale.
Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Peter Visser, Zahra Jiryaeisharahi, Kristof Marcoen, Shoshan T. Abrahami, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This work explores the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in organic coatings. An odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach is used to analyze the diffusion of ions independent from water uptake. The results show that a higher PVC leads to a more homogeneous coating structure, resulting in faster diffusion of ions and enhanced water uptake.
Article
Materials Science, Multidisciplinary
Eloa Lopes Maia, Serguei Gavrilov, Valentyn Tsisar, Kitty Baert, Iris De Graeve
Summary: The effect of pre-oxidation in air at 300-500°C on the initiation and development of liquid metal corrosion attack on 316L austenitic steel in static lead-bismuth eutectic (LBE) has been investigated. It was found that pre-formed oxide films can protect the surface against dissolution, while high temperature pre-oxidation leads to localized corrosion.
Article
Materials Science, Multidisciplinary
Baozhuang Sun, Qiuyu Wang, Yue Pan, Zhiyong Liu, Cuiwei Du, Xiaogang Li
Summary: In this study, a non-steady electrochemical model was established to investigate stress corrosion cracking (SCC). The model was verified using 304 SS with various microstructures, confirming its effectiveness in assessing SCC susceptibility.
Article
Materials Science, Multidisciplinary
Xingyu Xiao, Xinhua Liu, Zhilei Wang, Xuexu Xu, Mingying Chen, Jianxin Xie
Summary: The corrosion behavior and mechanisms of Cu-10Ni-X (Al, Fe, Mn, Cr, Sn, Ti, Zn) alloys in a 3.5% NaCl solution were systematically investigated. Both computational and experimental results revealed that except Ti, other elements could enhance the corrosion resistance of Cu2O passivation film.
Article
Materials Science, Multidisciplinary
Gen Zhang, Yan-Ping Huang, E. Jiang, Wei -Wei Liu, Hong Yang, Jing Xiong, Yong-Fu Zhao
Summary: The addition of aluminum has a significant influence on the intermetallic compounds in AFA alloys, particularly increasing the content of B2-NiAl phase. In the SCO2 environment, the oxide scales formed on AFA alloys with aluminum were thinner than on ASS without aluminum, and the structure of the oxide scales changed to a double-layer structure.
Article
Materials Science, Multidisciplinary
Yuxuan He, Guozheng Xiao, Chao Wang, Xuefeng Lu, Liuyuan Li, Shiying Liu, Yusheng Wu, Zhanjie Wang
Summary: The relationship between configurational entropy and lattice distortion in novel rare earth monosilicates was investigated, and the effect of configurational entropy on their properties was studied. The results showed that lattice distortion increased with the increase of configurational entropy, but a highly symmetrical crystal structure was formed when the configurational entropy was large enough, inhibiting the lattice distortion.
