Article
Chemistry, Multidisciplinary
Feiying You, Jie Zeng, Alvi Muhammad Rouf, Shicheng Dong, Jun Zhu
Summary: This study investigates the activation and coupling of dinitrogen (N-2) using cyclic (alkyl)(amino)carbene (CAAC)-stabilized borylenes. Density functional theory calculations show that the reaction barrier for dinitrogen activation by the first borylene is slightly higher than that by the second borylene. Replacing the CAAC moiety with cyclic diaminocarbenes (CDACs) enhances the thermodynamic favorability of dinitrogen activation and coupling. The study also discusses the intramolecular C-H bond activation of borylenes, which is found to be more favorable than N-2 activation both thermodynamically and kinetically. These findings highlight the importance of designing borylenes for N-2 activation and provide insights for the development of main group species for dinitrogen and C-H bond activation.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Hoyoung Kim, Hyanjoo Park, Dinh Son Tran, Soo-Kil Kim
Summary: Ni62Mo38 catalyst exhibits the highest HOR activity in 0.1 M KOH solution and shows improved performance after stability testing compared to previously reported non-precious HOR catalysts. This superior performance, attributed to structural properties and modified electronic structure, indicates its potential applicability to AEMFC.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jie Zeng, Jiaying Su, Feiying You, Jun Zhu
Summary: It is found that methyleneboranes without any substituent at the boron atom perform best on dinitrogen activation due to their small singlet-triplet gap. Strong correlations are achieved between the singlet-triplet energy gap and the reaction energies for the formation of end-on and side-on products. Methyleneboranes can mimic transition metals to cleave the N=N triple bond, which is important for experimental chemists studying dinitrogen activation by main group species.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Physical
Wanyi Liao, Qin Zhao, Shanshan Wang, Yiling Ran, Hong Su, Rong Gan, Shun Lu, Yan Zhang
Summary: The high energy consumption in water electrolysis systems is attributed to the slow kinetics of the oxygen evolution reaction (OER). Substituting thermodynamically advantageous small molecule oxidation reactions for OER can significantly improve energy conversion efficiency. Studying the in-depth reaction mechanism of complex substrates is necessary due to their elemental composition. This review focuses on the electrooxidation mechanism of different substrate molecules, such as ethanol, urea, and hydrazine, and introduces design ideas and strategies for high-performance electrocatalysts in relation to reaction path selectivity. The challenges in achieving industrial transformation in this field are also discussed.
JOURNAL OF CATALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Aram Yoon, Jung Hwa Kim, Zonghoon Lee
Summary: This study reveals the role of potassium ions in the oxidation of TMDs and proposes a novel anisotropic etching mechanism driven by self-running oxide droplets. The research demonstrates that potassium-mediated oxidation of MoS2 leads to the formation of K-intercalated hexagonal-phase molybdenum oxides, while orthorhombic-phase oxides are formed in the absence of potassium ions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Shengtai Qian, Gang Huang, Tong Zhu, Yue Zhang, Wukui Tang, Ronghai Yu
Summary: A series of amorphous MoCo lamellar hydroxides were synthesized through one-step chemical co-precipitation, with different functional agents and Mo addition influencing the micromorphology and catalytic performance of the catalyst. Samples with appropriate additives and optimized Mo content exhibited the highest intrinsic catalytic activity.
Article
Materials Science, Multidisciplinary
Fan Liu, Xinghong Cai, Yang Tang, Wenqian Liu, Qianwei Chen, Peixin Dong, Maowen Xu, Yangyang Tan, Shujuan Bao
Summary: This study presents a new method for boosting hydrogen production and removing environmental pollutants through catalytic adsorption of sulfides and promotion of hydrogen evolution reaction kinetics. The assembly of nano-Ni-functionalized molybdenum disulfide nanosheets on steel mesh greatly enhances the catalytic performance and achieves nearly 100% hydrogen production efficiency. The proposed Ni-MoS2-based system consumes 61% less power per kWh than traditional systems, indicating its promising potential for sustainable energy production.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Hayato Takahashi, Shunji Kato, Naoki Shimizu, Yurika Otoki, Junya Ito, Masayoshi Sakaino, Takashi Sano, Jun Imagi, Kiyotaka Nakagawa
Summary: This study evaluated the mechanisms responsible for extra virgin olive oil (EVOO) oxidation by quantitatively determining triacylglycerol hydroperoxide (TGOOH) isomers. The results indicated that linoleic acid and oleic acid in EVOO likely undergo radical and singlet oxygen (O-1(2)) oxidation. These research methods are valuable in understanding the impact of different factors on the oxidative stability of EVOO.
Article
Chemistry, Multidisciplinary
Sungho Park, Amanda R. Corcos, Alexander N. Jambor, Tzuhsiung Yang, John F. Berry
Summary: Construction of nitrogen-nitrogen triple bonds via homocoupling of metal nitrides is a significant reaction relevant to a potential Nitrogen Economy. Room temperature photolysis of Ru-2(chp)(4)N-3 (chp(-) = 2-chloro-6-hydroxypyridinate) in CH2Cl2 produces N-2 via reductive coupling of Ru-2(chp)(4)N nitrido species. Computational analysis reveals that the nitride coupling transition state (TS) features an out-of-plane zigzag geometry instead of the anticipated planar zigzag TS.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Gao-Xiang Wang, Xueli Wang, Yang Jiang, Wang Chen, Chunxiao Shan, Peng Zhang, Junnian Wei, Shengfa Ye, Zhenfeng Xi
Summary: Electrophilic functionalization of N2 moieties in metal dinitrogen complexes is challenging, and efficient conversion of N2 into diazenido and hydrazido species is still a great obstacle. In this study, we provide a detailed investigation on the reaction intricacies, revealing fleeting diazenido intermediates and long-lived hydrazido products. Both the first and second electrophilic functionalization steps show quantitative conversions at low temperatures. Based on these findings, large-scale and near-quantitative preparation of all hydrazido species is achieved.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Wanli Liang, Mengyan Zhou, Xiulan Li, Lijie Zhu, Zhixin Li, Yifan Zhou, Jian Chen, Fangyan Xie, Hao-Fan Wang, Nan Wang, Yanshuo Jin, Hui Meng
Summary: Hydrogen energy is the most suitable solution for long-term, large-scale energy storage. The design of efficient, economical, and stable electrocatalysts for hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) is crucial for its commercial development. In this study, a Ni nanocluster supported on oxygen-vacancy-rich MoO2 (Ni/MoO2_x) is designed and it shows excellent hydrogen electrocatalytic activity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Kai Zhang, Chunlei Liu, Nigel Graham, Gong Zhang, Wenzheng Yu
Summary: A research study presented a facile strategy for the controllable fabrication of the bimetallic active Co2Mo3O8 electrocatalyst for alkaline urea splitting. The synergistic effect of the Co-Mo dual sites was confirmed, and theoretical calculations revealed key features determining high reactivity for urea oxidation.
Article
Chemistry, Multidisciplinary
Jiaxin Zhang, Sisi Li, Xiaohan Liu, Haoquan Zheng, Wei Zhang, Rui Cao
Summary: Interface engineering is used to improve the activity of catalysts in electrocatalytic oxygen evolution reaction (OER). In this study, Co3O4 supported on β-Mo2C with different interfaces were investigated. The strong interaction between Co3O4 nanoparticles and β-Mo2C nanobelts led to a compact interface, which enhanced the conductivity and promoted the charge transfer process during OER. The surface loading of Co3O4 improved the hydrophilicity of the material, while β-Mo2C had the capability to dissociate H2O molecules. This study demonstrates an example of interface engineering in electrocatalytic OER.
Article
Chemistry, Physical
Thierry Tsafack, Stephen F. Bartolucci, Joshua A. Maurer
Summary: This study utilizes molecular dynamics simulations and ab initio calculations to elucidate the reaction pathway of sulfur with molybdenum trioxide. The research shows that molybdenum trioxide can catalyze the decomposition of larger sulfur allotropes, and the temperature dependence analysis indicates that the maximum reaction rates occur between 1000 and 1100 K, which is consistent with experimental growth temperatures for molybdenum disulfide.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Physical
Jifang Zhang, Qiyuan Lin, Zhenlei Wang, Haowen Liu, Xuanzhang Li, Yuegang Zhang
Summary: The study proposes that water oxidation on hematite can proceed via mixed reaction paths, contrary to the traditional assumption of a single reaction path. By isolating absorption signals of surface states responsible for water oxidation, the research highlights the significant contribution of direct hole transfer, especially for highly doped hematite. This finding challenges existing experimental techniques that rely on oversimplified models and theories.
Article
Electrochemistry
Akira Katayama, Tomohiko Inomata, Tomohiro Ozawa, Hideki Masuda
ELECTROCHEMISTRY COMMUNICATIONS
(2016)
Article
Electrochemistry
Akira Katayama, Tomohiko Inomata, Tomohiro Ozawa, Hideki Masuda
Article
Chemistry, Physical
Go Iijima, Tatsuya Kitagawa, Akira Katayama, Tomohiko Inomata, Hitoshi Yamaguchi, Kazunori Suzuki, Kazuki Hirata, Yoshimasa Hijikata, Miho Ito, Hideki Masuda
Article
Chemistry, Inorganic & Nuclear
Yoshiaki Kokubo, Chiaki Yamamoto, Kazuki Tsuzuki, Takuya Nagai, Akira Katayarna, Takehiro Ohta, Takashi Ogura, Yuko Wasada-Tsutsui, Yuji Kajita, Shinichi Kugimiya, Hideki Masuda
INORGANIC CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Akira Katayama, Yuko Wasada-Tsutsui, Tomohiko Inomata, Tomohiro Ozawa, Hideki Masuda
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2019)
Article
Chemistry, Inorganic & Nuclear
Akira Katayama, Tomohiko Inomata, Tomohiro Ozawa, Hideki Masuda
DALTON TRANSACTIONS
(2017)
