Article
Chemistry, Physical
Teng He, Yi He, Hongjie Li, Xiangying Yin, Jing Ma, Heng Shi, Liang Zhou, Li Chen
Summary: This study successfully synthesized a 3D hierarchical heterostructure precursor on NiCo-layered double hydroxides through surface engineering strategy, which can be further transformed into a tri-metallic phosphide with excellent catalytic performance. Additionally, urea-assisted system was found to have energy saving advantage superior to traditional water splitting in alkaline electrolyte.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Rui-Qing Li, Xiao-Yu Wan, Bao-Li Chen, Ru-Yuan Cao, Qing-Hong Ji, Jie Deng, Kong-Gang Qu, Xue-Bin Wang, Ya-Chao Zhu
Summary: The new Ni3N/Ni0.2Mo0.8N/NF catalyst demonstrates multifunctional superior performance for overall water and urea electrolysis, requiring low overpotentials and ultrasmall potentials for hydrogen generation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Pin Ma, Zehao Zhang, Jian Wang, Haibo Li, Hui Ying Yang, Yumeng Shi
Summary: Robust 2D VS2/Ti(3)C(2)T(x)MXene nanostructures with strong TiS covalent bond have been synthesized through a self-assembly approach, providing a conductive network for electrolyte penetration and rapid charge transfer. These nanostructures exhibit low sodium diffusion barrier and small charge transfer impedance, demonstrating excellent electrochemical performance and high-rate cycling stability, indicating the great potential of interfacial interactions for energy storage devices.
Article
Electrochemistry
Haoting Zang, Fei Yang, Shilei Cao, Mingzhi Yang, Weiliang Liu, Manman Ren, Yuanhao Wang
Summary: In this study, a three-dimensional rose-like VS2 structure with excellent cycling stability and high capacity was prepared via a solvothermal method. The self-assembled structure facilitates electron/Na+ transport and mitigates volume change during Na+ insertion/extraction, resulting in outstanding performance at high current densities. Benefitting from the 3D self-assembled structure, the VS2 electrode maintained a high capacity of 565 mA h g(-1) after 350 cycles at 5 A g(-1), showcasing superior high rate performance.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Xiaoqiang Du, Yangyang Ding, Xiaoshuang Zhang
Summary: In this study, an advanced electrocatalyst of MOF-derived hollow Zn-Co-Ni sulfides nanosword arrays (ZCNS-1/2) was reported, which exhibited remarkable catalytic activity for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), as well as excellent water electrolysis performance.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Engineering, Environmental
Lili Wang, Wurigamula He, Duanduan Yin, Yunrui Xie, Helin Zhang, Qianli Ma, Wensheng Yu, Ying Yang, Xiangting Dong
Summary: A binder-free self-standing composite electro-catalyst, consisting of a carbon layer containing Fe2P/Co2P nanoparticles on a nickel foam substrate with Mo2S3, has been innovatively designed and synthesized. This catalyst exhibits excellent catalytic performance for urea oxidation reaction, with low overpotential and high stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yunfeng Qiu, Xiaofan Dai, Yanping Wang, Xinyang Ji, Zhuo Ma, Shaoqin Liu
Summary: This study develops a facile and large-scale method to prepare bifunctional HER and UOR electrocatalysts for H-2 production via urea electrolysis in a less-energy saving way.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Manas Kumar Pradhan, Deepika Gupta, Kavthekar Rupesh Namdev, Anjali, Chirag Miglani, Asish Pal, Aasheesh Srivastava
Summary: Stimuli-responsive self-assembled and supramolecular hydrogels derived from peptide amphiphiles have been investigated for their anion-responsiveness, with a specific NapF-TREN hydrogel found to be disruptable by tetrahedral monovalent anions such as H2PO4- and HSO4-. The anion-gelator interaction was confirmed to be reversible and programmable, allowing for sequential drug release from the hydrogel system.
Article
Chemistry, Multidisciplinary
Swati J. Patil, Nilesh R. Chodankar, Seung-Kyu Hwang, Ganji Seeta Rama Raju, Yun-Suk Huh, Young-Kyu Han
Summary: In the field of electrocatalytic water splitting, developing efficient noble-metal-free electrocatalysts remains a challenge. A scalable one-step synthesis approach was used to prepare self-supported fluorine-modified 2D ultrathin nickel hydroxide nanosheets, which demonstrated enhanced redox activity, electrical conductivity, and a large number of exposed active sites for improved charge migration during electrocatalytic reactions.
Article
Nanoscience & Nanotechnology
Jinchao Liu, Yao Wang, Yifei Liao, Chaoling Wu, Yigang Yan, Haijiao Xie, Yungui Chen
Summary: The heterostructured Ni3S2-Ni3P/NF catalyst synthesized via one-step thermal treatment shows superior performance and stability in urea-water electrolysis. Theoretical calculations indicate that Ni atoms at the interface are the most efficient catalytically active site. This work demonstrates an easy treatment for enhancing the catalytic activity of Ni-based materials in achieving high-efficiency urea-water electrolysis.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Velusamy Maheskumar, Ahreum Min, Cheol Joo Moon, Raja Arumugam Senthil, Myong Yong Choi
Summary: A rapid and effective method for synthesizing Mo-doped Ni/NiO nanocomposite as a highly efficient urea oxidation reaction electrocatalyst is proposed in this study. The nanocomposite, with increased content of oxidized nickel, shows remarkable activity in both oxygen evolution reaction and urea oxidation reaction, as well as outstanding long-term stability. This work provides a rapid and effective approach for the synthesis of cost-effective and efficient electrocatalysts for clean energy production and wastewater treatment.
Article
Chemistry, Physical
Zunhang Lv, Zihan Li, Xiao Tan, Zhengmin Li, Rui Wang, Mengjin Wen, Xin Liu, Guixue Wang, Guangwen Xie, Luhua Jiang
Summary: In this study, a NiFeMo hybrid film was prepared by simple one-step electrodeposition, showing excellent electrocatalytic performances for hydrogen evolution and urea oxidation. The Mo dopant significantly affects the HER performance of NiFeMo, and the excellent OER and UOR performance is derived from the synergism of these three metals and the formation of active intermediates. This work provides a facile method to synthesize low-cost and high-performance electrocatalysts for urea electrolysis and water splitting, which may open up new opportunities for hydrogen production.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yangyang Ding, Xiaoqiang Du, Xiaoshuang Zhang
Summary: The study introduces a multifunctional electrocatalyst for water electrolysis with excellent performance, especially in catalyzing urea oxidation as a potential alternative to slow oxygen evolution. By analyzing the structure-function relationship of the material, it was found that Cu-Ni3S2@NiFe LDH-200 excels in oxygen evolution and urea oxidation reactions.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Dongfang Wen, Wendi Peng, Wenting Zhang, Yi Xia, Mao Ye, Wei Hu
Summary: In this study, researchers developed an efficient electrolytic material for hydrogen fuel production and sewage denitrification. The material, composed of a unique heterostructure with multiple interfaces, exhibited outstanding electrochemical performance due to its multi-phase, multi-interface, and highly porous structure. It demonstrated superior activity and selectivity, appropriate kinetics, high charge transfer efficiency, and robust durability in urea and urine media.
APPLIED SURFACE SCIENCE
(2023)
Article
Electrochemistry
Suyang Feng, Peng Rao, Yanhui Yu, Jing Li, Peilin Deng, Zhenye Kang, Shaolei Wang, Zhengpei Miao, Yijun Shen, Xinlong Tian, Zhifu Wu
Summary: Efficient, stable, and inexpensive oxygen evolution reaction (OER) catalysts are explored for the practical application of seawater electrolysis. In this study, CoSe2@CoO/CF catalysts are prepared using a simple and scalable one-step electrodeposition method, and their OER performance is extensively investigated. The CoSe2@CoO/CF catalyst (273 mV) exhibits significantly higher activity than the IrO2 catalyst (435 mV). It can be operated steadily at high current densities (100 mA cm-2) for over 200 hours in 1.0 M KOH + seawater. Moreover, the catalyst shows excellent selectivity with a Faraday efficiency of approximately 98% for OER, while the ClO- concentration is extremely low (1.312 x 10-7 mol L-1) as measured by UV-visible characterization. The impressive performance can be attributed to the urchin-like heterogeneous structure of the catalyst with abundant active centers, as well as the facilitation of para-site electron transfer due to the strong overlap between the Co 2p orbitals of monometallic bi-compound catalysts.
ELECTROCHIMICA ACTA
(2023)
Article
Physics, Multidisciplinary
Hyunsik Im, Dong Uk Lee, Yongcheol Jo, Jongmin Kim, Yonuk Chong, Woon Song, Hyungsang Kim, Eun Kyu Kim, Taewon Yuk, Sang-Jin Sin, Soonjae Moon, Jonathan R. Prance, Yuri A. Pashkin, Jaw-Shen Tsai
Summary: Doping silicon with phosphorus and introducing localized magnetic moments results in a correlated electronic ground state known as Kondo condensation. By conducting electrical transport and density-of-states spectroscopy measurements, we detect the Kondo effect and observe an unusual pseudogap in the resistivity and density of states of the highly P-doped silicon metal. These observations provide evidence of Kondo condensation followed by a transition to a disordered Fermi liquid phase.
Article
Energy & Fuels
Abu Talha Aqueel Ahmed, Jonghoon Han, Giho Shin, Sunjung Park, Seungun Yeon, Youngsin Park, Hyungsang Kim, Hyunsik Im
Summary: A facile template-free controllable growth method was developed to synthesize polyhedron-like CoS on microporous Ni foam. The electrochemical performance of the CoS catalyst was significantly improved by nitrogen doping and sulfur incorporation, leading to enhanced electrocatalytic activities for OER and HER.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Physical
V. Jagadeesha Angadi, B. Chethan, Vinayak Pattar, N. B. Shigihalli, Supriya A. Patil, Mohd Ubaidullah, Satbir S. Sehgal, Chander Prakash, S. Manjuantha, K. Manjunatha
Summary: This study explores the construction of a cobalt chromate-reduced graphene oxide (CCR-rGO) composite, which exhibits high humidity sensing responsiveness at room temperature. A simple method for producing reduced graphene oxide (rGO) on a large scale using the combustion process has been discovered. The composite material was characterized using X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The CCR-rGO composite demonstrated the best sensing response between 11% and 97% relative humidity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Bidhan Pandit, Sachin R. Rondiya, Shoyebmohamad F. Shaikh, Mohd Ubaidullah, Ricardo Amaral, Nelson Y. Dzade, Emad S. Goda, Abu ul Hassan Sarwar Rana, Harjot Singh Gill, Tokeer Ahmad
Summary: Potassium-ion batteries (KIBs) are promising energy storage devices with low cost and excellent K+ diffusion properties. Manganese dioxide (alpha-MnO2) nanorods cathode exhibits fast reversible K+ storage with high capacity and stability. The K+ intercalation/deintercalation in alpha-MnO2 is confirmed through experimental techniques and DFT simulations, and the nanorod structure facilitates electron conduction and strong electrode-electrolyte interface for consistent and superior performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Iqra Rabani, Supriya A. Patil, Muhammad Shoaib Tahir, Fatima Afzal, Je-Won Lee, Hyunsik Im, Young-Soo Seo, Nabeen K. Shrestha
Summary: A facile and cost-effective method was used to synthesize ZIF8 nanocrystals with uniform morphology and high yields. The ZIF8 nanocrystals obtained at different reaction times were evaluated for catalyzing the electrochemical hydrogen evolution reaction (HER), and the optimized ZIF8-3 sample showed superior catalytic activity and long-term stability compared to other samples.
Article
Chemistry, Multidisciplinary
Supriya A. Patil, Pranav K. Katkar, Mosab Kaseem, Ghazanfar Nazir, Sang-Wha Lee, Harshada Patil, Honggyun Kim, Verjesh Kumar Magotra, Hoa Bui Thi, Hyunsik Im, Nabeen K. Shrestha
Summary: A copper-doped iron-based metal-organic framework (Cu@Fe-MOF/NF) thin film was prepared on a 3D-nickel foam (NF) substrate for supercapacitor applications. The Cu@Fe-MOF/NF electrodes exhibited a high specific capacitance of 420.54 F g(-1) at 3 A g(-1), twice compared to the nano-cuboidal Fe-MOF/NF (210 F g(-1)). The assembled asymmetric solid-state supercapacitor device showed superior performance in terms of energy density (44.20 Wh.kg(-1)) and electrochemical charge-discharge cycling durability with 88% capacitance retention after 5000 cycles.
Article
Multidisciplinary Sciences
Abdullah M. Al-Enizi, Ayman Yousef, Mohd Ubaidullah, Alamgir Karim, M. M. El-Halwany
Summary: Carbon nanofibers (CNFs) decorated with heterojunction iron titanate/titanate nanoparticles (FeTiO3/TiO2 NPs) were prepared using electrospinning and demonstrated strong photocatalytic activity for hydrogen (H2) production from ammonia borane (AB) under visible light. The H2 evolution rate over FeTiO3/TiO2@CNFs was significantly higher than over TiO2@CNFs, both under visible light and in the dark. A mathematical model accurately predicted the photocatalytic activity, which was verified through experimental measurements.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Article
Multidisciplinary Sciences
Pooja Prakash, B. Janarthanan, Mohd Ubaidullah, Abdullah M. Al-Enizi, Shoyebmohamad F. Shaikh, Nouf B. Alanazi, Rayana Ibrahim Alkhalifah, Mohammad Ilyas
Summary: The bracts of Poinsettia, Tamarillo fruit, Annatto seeds, and Pungent Chillies were used to extract dyes, which were then used as sensitizers in dye-sensitized solar cells. The dyes were analyzed using FTIR and UV-Visible spectroscopy to determine their absorption effectiveness. The study found that the sensitizers in the dyes showed strong electronic coupling and rapid electron transfer. The presence of phytoconstituents impacted the color of the sensitizers and degradation in power conversion efficiencies was observed.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Article
Energy & Fuels
Mukhtar Ahmed, Mohd Faisal, Abdullah Laskar, Anas Abdullah, Mohammad Shahadat, Khalid Umar, Hesam Kamyab, Mohd Ubaidullah, Bidhan Pandit, Chander Prakash, Mohammad Yusuf
Summary: The drying kinetics of beetroot were studied experimentally and mathematically. The effect of input electrical power on the drying kinetics was investigated. Seven mathematical models were employed to study the thin layer drying behavior of beetroot specimens. The results showed that the page model was the best-suited model, with high correlation coefficients and low root mean square error values. Increasing microwave power significantly reduced drying time and energy consumption.
Article
Physics, Condensed Matter
Ashwani Kumar, Anuj Kumar, Mohaseen S. Tamboli, Mohd Ubaidullah, J. Jayarubi, S. K. Tripathi
Summary: In this study, lead-based perovskite solar cells are replaced by bismuth-based perovskite cells to overcome their instability and toxicity. CsBi3I10 perovskite films are fabricated using a modified drop-casting process, and the effects of post-annealing temperature on the morphological, structural, and optical properties are investigated. The photovoltaic performance of the cells without a hole transport layer is also quantitatively evaluated.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Multidisciplinary Sciences
Nafisur Rahman, Abdur Raheem, Abdullah A. Al-Kahtani, Bidhan Pandit, Mohd Ubaidullah
Summary: This study investigates the decontamination of Pb (II) from aqueous environment using a graphene oxide/ hydrous zirconium oxide/crosslinked starch bio-composite (GZS-BC). The optimization of Pb (II) sorption was conducted using the Taguchi method, and the best conditions resulted in a maximum removal efficiency of 98.50% at pH 6. The Freundlich isotherm model was found to be the best fit with high R2 values and low v2 and APE values. The kinetic data suggested a heterogeneous surface of GZS-BC with multiple sorption sites, and the thermodynamic study indicated that both physisorption and chemisorption played a role in the uptake of Pb (II).
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Nabeen K. Shrestha, Supriya A. Patil, Jun Ho Seok, Amol S. Salunke, Sangeun Cho, Akbar I. Inamdar, Youngsin Park, Sang Uck Lee, Hyungsang Kim, Hyunsik Im
Summary: Engineering the crystallinity of metal-organic frameworks via Ce-doping can expose active electrocatalytic sites and enhance the oxygen evolution reaction (OER) activity. Optimally Ce-doped MIL-88B(Ni)/NF anode shows lower overpotentials, superior kinetic and turnover frequency for OER. DFT calculations support the Ce3+ ion doping effect on inducing site-selective crystal disorder and enhancing OER electrocatalytic activity.
MATERIALS TODAY PHYSICS
(2023)
Article
Engineering, Environmental
Mohd Ubaidullah, Abdullah M. Al-Enizi, Ayman Nafady, Shoyebmohammad F. Shaikh, K. Yogesh Kumar, M. K. Prashanth, L. Parashuram, Byong-Hun Jeon, M. S. Raghu, Bidhan Pandit
Summary: The excessive usage of fossil fuels results in a vast amount of CO2 exposure to the ecosystem, leading to global ecological imbalance. CO2, aside from being a pollutant, has the potential to be converted into useful carbonaceous products when exposed to light. In this study, researchers fabricated a 1:1 ratio of g-C3N4-Ce2S3 heterostructure through a solvothermal approach. The GCN/CeS heterostructure exhibited enhanced activity in selective CO2 conversion and showed effectiveness in degrading the herbicide Atrazine under visible light. LC-MS analysis revealed the degradation pathway and mechanism of Atrazine in the GCN/CeS heterostructure. The stability of the GCN/CeS heterostructure demonstrated its potential in photocatalytic processes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Anuj Kumar, Ram K. Gupta, Mohd Ubaidullah, Abdullah M. Al-Enizi, Bidhan Pandit, Senthilkumar Nangan, V. Jagadeesha Angadi, Ghulam Yasin
Summary: This article reports a hollow mesoporous Fe-graphitic carbon nitride supported on carbon nanotubes (Fe-C3N3@CNTs) as a superior electrocatalyst for the oxygen reduction reaction (ORR) in fuel cells. The Fe-C3N3@CNTs composite showed dominant 4e-ORR pathway, exceptional methanol tolerance, and durability. Theoretical analysis revealed that Fe-C3N3 catalytic moieties facilitated the adsorption and desorption of oxygen, enabling efficient ORR.
