Article
Environmental Sciences
Sajad Mobini, Mehran Rezaei, Fereshteh Meshkani
Summary: Co-Fe, Cu-Cr, and Co-Mn mixed oxide catalysts were prepared using a one-pot hard template synthesis method, and their catalytic performance significantly improved after rearrangement of the template, with increased specific surface area and reducibility. The CoMn catalyst showed the most promising catalytic performance with a reduced 100% conversion temperature. However, the presence of water vapor was found to decrease the activity and stability of the catalyst, with a calculated activation energy of 59.5 kJ/mol for the Co-Mn catalyst, confirming the MVK mechanism as the most probable reaction mechanism.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Jianye Pei, Lihua Bi
Summary: The preparation of clean energy is an effective solution to the global energy crisis and environmental pollution. Developing a water oxidation catalyst can accelerate water decomposition, leading to the generation of clean energy. This study explores the combination of nickel-substituted polyoxometalates and reduced graphene oxide as a composite material, which exhibits excellent photoelectrocatalytic performance for water oxidation. The findings suggest that this composite material has great potential as an effective photoelectrocatalyst for practical water oxidation applications.
Article
Chemistry, Multidisciplinary
Songying Qu, Hao Wu, Yun Hau Ng
Summary: A ZnO passivator-coated BiVO4 photoanode is used for selective photoelectrochemical (PEC) synthesis of H2O2. The H2O2 selectivity and production rate increase under simulated sunlight irradiation in the range of 1.0-2.0 V versus RHE. The ZnO coating facilitates H2O2 generation, suppresses the competitive reaction of O-2 evolution, inhibits H2O2 decomposition, accelerates charge extraction from BiVO4, and serves as a hole reservoir under photoexcitation. This work provides insights into manipulating two/four-electron transfer for selective H2O2 synthesis from PEC water oxidation.
Review
Environmental Sciences
Hai Bang Truong, Sungjun Bae, Jinwoo Cho, Jin Hur
Summary: Graphitic carbon nitride (g-C3N4) has been recognized as a non-metallic photocatalyst with high adsorption affinity and thermal stability in water treatment, widely used in degrading contaminants and activating oxidants. Its compatibility with various materials and scalability in synthesis make it a versatile tool in improving water purification processes through oxidation activation and photoelectrocatalysis.
Review
Environmental Sciences
Paulina Alulema-Pullupaxi, Patricio J. Espinoza-Montero, Carol Sigcha-Pallo, Ronald Vargas, Lenys Fernandez, Juan M. Peralta-Hernandez, J. L. Paz
Summary: Water pollution is a growing environmental problem due to population growth, industrialization, and agricultural expansion. Conventional wastewater treatment methods are ineffective in removing organic and toxic pollutants, but electrochemical advanced oxidation processes, particularly photoelectrocatalysis (PEC), offer a promising solution. PEC technology involves applying bias potential to a semiconductor film on a conductive substrate to enhance degradation of pollutants in water.
Article
Nanoscience & Nanotechnology
Debraj Chandra, Tomohiro Katsuki, Yuki Tanahashi, Takanari Togashi, Yuta Tsubonouchi, Norihisa Hoshino, Zaki N. Zahran, Masayuki Yagi
Summary: By adjusting the temperature of the (N2H4)WO3 precursor suspension, a unique transformation of WO3 nanowires into hexagonal prisms was achieved. The resulting HP-WO3 nanocrystals exhibited a single-crystalline character and superior photoelectrochemical (PEC) water oxidation performance compared to NW-WO3 nanocrystals. The efficient water oxidation reaction at the surface of the HP-WO3 electrode was attributed to the high surface fraction of the active (002) facet with fewer grain boundaries and defects.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Fang Zhang, Shuang Zong, Yue Zhang, Haijun Lv, Xinying Liu, Juan Du, Aibing Chen
Summary: By utilizing mesoporous silica template to prepare N-doped HCS, direct carbon formation can be achieved, simplifying the preparation process. The thickness of the HCS shell, morphology, and surface properties can be adjusted, leading to high electrochemical performance as an active electrode material in supercapacitors.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Multidisciplinary
Piyali Chatterjee, Amit K. Chakraborty
Summary: In this study, a facile surface treatment method using Fe2+ ions was demonstrated to enhance the photo-electrochemical water oxidation of nanostructured tungsten oxide (WO3) film. The optimized WO3 film with a Fe:W ratio of -1:25 showed a 3 times higher and more stable photocurrent under back illumination compared to untreated WO3, indicating the success of the surface treatment. The improved performance was attributed to the enhanced charge transfer process at the interface, resulting in the reduction of unwanted recombination.
Article
Chemistry, Inorganic & Nuclear
Jingyi Han, Mingzhu Zhang, Xue Bai, Zhiyao Duan, Tianmi Tang, Jingqi Guan
Summary: The development of high-performance and Earth-abundant catalysts for the oxygen evolution reaction is crucial. In this study, bimetallic Mn-Fe oxyhydroxides with large specific surface area and porous structure were synthesized using a template method. The results showed that the mesoporous Mn1Fe1Ox exhibited excellent OER performance and outperformed most Mn-based electrocatalysts. Kinetic studies revealed the synergistic catalysis of Fe and Mn sites, and theoretical calculations indicated that the surface doping of Fe onto MnOOH promoted the generation of highly active sites for the OER.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Zhixiang Guo, Yuting Diao, Xinru Han, Zihao Liu, Yonghong Ni, Li Zhang
Summary: Mesoporous NiCo2Se4 tubes, as electrode materials for supercapacitors, demonstrate exceptional energy-storage performance and cycle stability, with high specific capacitance and energy density at different current densities.
Article
Chemistry, Physical
Peizi Li, Zhengyuan Qi, Lei Yu, Hongwei Zhou
Summary: Highly crystalline K-intercalated Se/C material was successfully fabricated, and it was found that the corrosion of KBr by water can increase the mesopore amount and specific surface area of the material, facilitating the adsorption of organic reactants and boosting the reaction performance.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Applied
Maria Kuznetsova, Sibila A. A. Oliveira, Barbara S. Rodrigues, Juliana S. Souza
Summary: Microwave-assisted synthesis allows for precise control of the crystalline structure of bismuth niobate- and tungsten oxide-based heterojunctions, leading to enhanced photocatalytic performance.
TOPICS IN CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Weaam A. Al-Sulmi, Mohamed A. Ghanem, Saba A. Aladeemy, Abdullah M. Al-Mayouf, Nouf H. Alotaibi
Summary: This study demonstrates a simple and novel approach to synthesize mesoporous nickel phosphate nanoparticles (meso-NiPO) via chemical deposition from a surfactant liquid crystal template. The meso-NiPO exhibits superior activity for urea oxidation reaction in alkaline solution, with high specific surface area and long-term stability. The method of chemical deposition from a surfactant liquid crystal template has the advantages of feasible synthesis of a wide range of nanomaterials for electrochemical energy production and storage systems.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Amr A. Nada, Benjamin O. Orimolade, Heba H. El-Maghrabi, Babatunde A. Koiki, Matthieu Rivallin, Maged F. Bekheet, Roman Viter, Daina Damberga, Geoffroy Lesage, Igor Iatsunskyi, Emerson Coy, Marc Cretin, Omotayo A. Arotiba, Mikhael Bechelany
Summary: This study investigated the use of palladium loaded zinc oxide/carbon nanofibers as a novel photoanode for photoelectrocatalytic degradation of paracetamol. The results showed that the composite electrode exhibited higher photoelectrochemical activity and achieved efficient removal of paracetamol with significant mineralization. The Pd-ZnO/C composite has great potential for the photoelectrocatalytic removal of organic micropollutants.
APPLIED MATERIALS TODAY
(2021)
Review
Chemistry, Physical
Qi Wang, Liping Ren, Jie Zhang, Xin Chen, Chunying Chen, Fei Zhang, Shuai Wang, Jie Chen, Jinjia Wei
Summary: This review comprehensively summarizes and discusses the mechanism, (photo)electrocatalysts, and (photo)electrochemical devices for (photo)electrochemical H2O2 production. The pros and cons of different types of device designs are discussed, and future research directions are provided.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Sauvik Chatterjee, Sanjib Shyamal, Debraj Chandra, Michikazu Hara, Asim Bhaumik
MOLECULAR CATALYSIS
(2020)
Article
Chemistry, Multidisciplinary
Debabrata Chakraborty, Avik Chowdhury, Moumita Chandra, Rajkumar Jana, Sanjib Shyamal, Manas K. Bhunia, Debraj Chandra, Michikazu Hara, Debabrata Pradhan, Ayan Datta, Asim Bhaumik
Summary: Research in efficient strategies for sustainable and renewable energy production has led to the discovery of the importance of nanomaterials based on 3d transition metals in the hydrogen evolution reaction (HER) via electrochemical water splitting. By designing a novel metal-organic framework, researchers were able to achieve good catalytic activity for hydrogen evolution in different mediums.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Physical
Debraj Chandra, Tomohiro Katsuki, Takeshi Masaki, Naoto Abe, Kenji Saito, Tatsuto Yui, Masayuki Yagi
Summary: This study addresses the challenge of developing efficient catalysts for water oxidation in artificial photosynthesis technologies by creating a transparent 2D mesoporous film of intermediate IrOx(OH)(y) on FTO electrodes, which shows a 11.2-fold higher specific surface area compared to nanoporous films and a 2.6-fold higher catalytic current due to increased intrinsic catalytic activity.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Manas K. Bhunia, Debraj Chandra, Hitoshi Abe, Yasuhiro Niwa, Michikazu Hara
Summary: This study investigates the reductive amination of carbonyls to primary amines using heterogeneous catalysts containing earth-abundant metals. The researchers find that a nickel catalyst with mixed oxidation states shows high activity under low temperature and H-2 pressure, likely due to the formation of partially oxidized nickel nanoparticles homogeneously anchored onto silica. The stabilization of these nanoparticles through strong metal support interaction via electron donation from the metal to support is identified as a key factor. The study opens up a new avenue for the rational development of efficient catalysts for organic transformations under mild reaction conditions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Shyamal Roy, Dilip Kumar Mondal, Sauvik Chatterjee, Avik Chowdhury, Tuhin Suvra Khan, M. Ali Haider, Subhash Mandal, Debraj Chandra, Michikazu Hara, Asim Bhaumik
Summary: In this study, a novel catalyst was synthesized via excess solution impregnation, which can selectively reduce CO2 into methane. The research found that under appropriate process conditions, the catalyst achieved a high CO2 conversion efficiency.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yuta Tsubonouchi, Takeumi Watanabe, Kazuha Yoshida, Shunsuke Watabe, Keisuke Inaba, Masanari Hirahara, Tsubasa Hatanaka, Yasuhiro Funahashi, Debraj Chandra, Norihisa Hoshino, Zaki N. Zahran, Masayuki Yagi
Summary: Geometric isomers of mononuclear ruthenium(II) complexes were synthesized and comprehensively studied to investigate the geometric and electronic structures, as well as unique aspects in various reactions between isomers.
INORGANIC CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Sabuj Kanti Das, Snehasis Mishra, Krishna Das Saha, Debraj Chandra, Michikazu Hara, Amany A. Mostafa, Asim Bhaumik
Summary: A new porous organic polymer material TrzTFPPOP was synthesized and shown to have a high surface area and hierarchical porosity. It induced apoptotic changes in colorectal carcinoma cells via p53-regulated DNA damage pathway. It has potential anticancer activity.
Article
Nanoscience & Nanotechnology
Debraj Chandra, Tomohiro Katsuki, Yuki Tanahashi, Takanari Togashi, Yuta Tsubonouchi, Norihisa Hoshino, Zaki N. Zahran, Masayuki Yagi
Summary: By adjusting the temperature of the (N2H4)WO3 precursor suspension, a unique transformation of WO3 nanowires into hexagonal prisms was achieved. The resulting HP-WO3 nanocrystals exhibited a single-crystalline character and superior photoelectrochemical (PEC) water oxidation performance compared to NW-WO3 nanocrystals. The efficient water oxidation reaction at the surface of the HP-WO3 electrode was attributed to the high surface fraction of the active (002) facet with fewer grain boundaries and defects.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Tomohiro Katsuki, Zaki N. Zahran, Yuta Tsubonouchi, Debraj Chandra, Norihisa Hoshino, Masayuki Yagi
Summary: This study demonstrates the improved photoelectrochemical water oxidation performance of α-Fe2O3/CoPi electrode through the formation of a p-n junction, leading to lower onset potential, higher charge separation, and catalytic efficiency compared to α-Fe2O3 electrode.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Physical
Zaki N. Zahran, Eman A. Mohamed, Tomohiro Katsuki, Yuta Tsubonouchi, Debraj Chandra, Norihisa Hoshino, Masayuki Yagi
Summary: A Pt(w-MeIm) film prepared using a glassy carbon substrate and platinum material showed efficient and stable performance in the hydrogen evolution reaction. The closely-compacted and well-interconnected Pt nanoparticles in the film contributed to its superior electrocatalytic activity compared to commonly used Pt-based electrodes.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Multidisciplinary
Avik Chowdhury, Sabuj Kanti Das, Saptarsi Mondal, Santu Ruidas, Debabrata Chakraborty, Sauvik Chatterjee, Manas K. Bhunia, Debraj Chandra, Michikazu Hara, Asim Bhaumik
Summary: Developing an efficient and robust material for removing highly toxic metal mercury from water resources is challenging from the perspectives of hygiene and sustainable environment. The porous organic polymer containing sulfur and nitrogen shows promising potential for mercury remediation.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Article
Nanoscience & Nanotechnology
Debraj Chandra, Shikha Saini, Saswata Bhattacharya, Asim Bhaumik, Keigo Kamata, Michikazu Hara
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Snehasis Mishra, Krishnendu Manna, Utpal Kayal, Moumita Saha, Sauvik Chatterjee, Debraj Chandra, Michikazu Hara, Sriparna Datta, Asim Bhaumik, Krishna Das Saha
Article
Chemistry, Physical
Debraj Chandra, Tsubasa Sato, Naoto Abe, Kenji Saito, Tatsuto Yui, Masayuki Yagi
SUSTAINABLE ENERGY & FUELS
(2019)
Article
Chemistry, Inorganic & Nuclear
Utpal Kayal, Bishnupad Mohanty, Piyali Bhanja, Sauvik Chatterjee, Debraj Chandra, Michikazu Hara, Bikash Kumar Jena, Asim Bhaumik
DALTON TRANSACTIONS
(2019)