Article
Chemistry, Physical
Kuo Cao, Shiwei Sun, Aiying Song, Jinxiao Ba, Haowen Lin, Xianghai Yu, Chengqun Xu, Bingjun Jin, Jan Huang, Donghua Fan
Summary: A new strategy was developed to prepare MoS2 @CoS2/G electrocatalysts with high-percentage metallic 1T-MoS2 phase, which exhibited excellent catalytic activity and stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Sankar Sekar, S. Brindha Devi, S. Maruthasalamoorthy, T. Maiyalagan, Deuk Young Kim, Sejoon Lee, R. Navamathavan
Summary: In this study, reduced graphene oxide decorated-cobalt disulfide (rGO-CoS2) nanocomposites were synthesized via a one-step hydrothermal method. The nanocomposites exhibited excellent hydrogen evolution reaction (HER) activities with low overpotential and small Tafel slope, providing a promising scheme for developing efficient rGO-CoS2 electrocatalysts in future green energy technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Karthi Keyan Arjunan, Ramachandran Rajakumaran, Subramanian Sakthinathan, Shen-Ming Chen, Te-Wei Chiu, Sivaramakrishnan Vinothini
Summary: The CuAlO2 delafossite complex combined with N-rGO and MWCNT shows excellent electrocatalytic activity for the hydrogen evolution reaction, with high surface area and long-term stability.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Boyuan Chen, Jiheng Wang, Siqi He, Yao Shen, Shuchen Huang, Hu Zhou
Summary: Modulation of electronic structure via heterointerface engineering is an appealing strategy to promote the hydrogen evolution reaction (HER) performance of a pH-universal electrocatalyst. In this study, a CoS2-MoS2 heterostructure with plentiful heterogeneous nanointerfaces is synthesized and exhibits superb catalytic activity and long-durability towards HER in both acidic and alkaline solutions. The synergistic modulation of electronic and geometric structures accounts for the excellent performance of CoS2-MoS2. This work provides an exciting avenue for fabricating efficient wide-pH electrocatalysts through an interface-induced strategy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Guangsheng Liu, Kunyapat Thummavichai, Xuefeng Lv, Wenting Chen, Tingjun Lin, Shipeng Tan, Minli Zeng, Yu Chen, Nannan Wang, Yanqiu Zhu
Summary: A novel defect-rich ternary nanocomposite MoS2/rGO/NiS was synthesized, showing enhanced electrocatalytic activity and stability for hydrogen evolution reaction in a wide pH range through the introduction of other metal phases and carbon materials.Abundant heterogeneous interfaces, expanded interlayer spacings, and high conductivity of graphene oxide contributed to the excellent hydrogen evolution performance of the MoS2/rGO/NiS catalyst.
Article
Chemistry, Physical
Chou-Kun Tang, Xi Zheng, Xiao-Liang Chen, Yu-Gang Fu, Qiu-Feng Lue
Summary: In this study, a high-performance MoS2/CoS2-2@Mo2TiC2Tx HER catalyst was prepared by compositing MoS2 and CoS2 onto MXene, showing good cycling stability and durability. The research provides a new approach for the preparation of efficient HER catalysts using non-precious metal composites.
Article
Chemistry, Multidisciplinary
Habib Khan, Sayyar Ali Shah, Wasif Ur Rehman, Fei Chen
Summary: Designing and engineering cheap and highly-efficient alternative electrocatalysts to replace platinum-based electrocatalysts is crucial for commercializing hydrogen production. In this study, a robust and highly active catalyst of CoS2 nanoparticle-decorated MoS2/reduced graphene oxide nanosheets is fabricated for hydrogen evolution reaction. The optimized nanocomposite exhibits outstanding performance with low onset overpotential, high current density, small Tafel slope, and high electrochemical durability.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Xiao-Liang Chen, Cong Liu, Chou-Kun Tang, Zhen-Hui Liu, Qiu-Feng Lue, Yanqiao Jin
Summary: In this study, a one-pot hydrothermal method was used to prepare CoS2@Mo2TiC2Tx catalyst, which showed high vulcanization efficiency and good durability. It exhibited good catalytic activity in 0.5 M H2SO4 and has the potential to replace the precious metal catalyst Pt/C.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Jiaye Yang, Chengli Chai, Cheng Jiang, Le Liu, Jingyu Xi
Summary: Designing low-cost and efficient non-noble-metal bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial for water splitting. In this study, a self-standing bifunctional electrode with MoS2-CoS2 heteronanosheet arrays on porous carbon microtube textile (MoS2-CoS2@PCMT) was developed for alkaline overall water splitting, showing lower overpotentials for HER and OER compared to Pt/C@PCMT and RuO2@PCMT at higher current density. The results highlight the importance of self-standing electrode structure and coupling of transition metal dichalcogenides for improving electrocatalyst performance in water splitting.
JOURNAL OF POWER SOURCES
(2021)
Article
Nanoscience & Nanotechnology
Zehao Yin, Xuan Liu, Siru Chen, Haijiao Xie, Liguo Gao, Anmin Liu, Tingli Ma, Yanqiang Li
Summary: Developing advanced electrocatalysis for overall water splitting is crucial for sustainable hydrogen production. The self-template method used in this work successfully synthesized MoS2/NiS2/CoS2 nanotube, which exhibited enhanced electron density and improved adsorption properties for H and OH-containing intermediates. The heterogeneous catalyst displayed low overpotentials and stable overall water splitting, showing great potential for practical applications.
MATERIALS TODAY NANO
(2022)
Article
Chemistry, Physical
Wentao Kong, Chengxiang Li, Weibing Wu
Summary: The supercritical growth method is used to directly grow MoS2 nanosheets on carbon cloth in acidic solution, leading to the formation of a mixed-phase 1T/2H structure. The resulting 1T/2H-MoS2@CC exhibits superior catalytic performance for the hydrogen evolution reaction in both alkaline and acidic solutions, and shows high stability in alkaline solution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Aruna K. Kunhiraman, S. Akash Prabhu, Muhammad Rahees Puthalath, R. Ajay Rakkesh, Adrian Hochgesang
Summary: A one-pot hydrothermal synthesis of MoS2/CoS2 heterostructure with and without carbon nanostructures as support material is reported. The electrical conductivity is enhanced by introducing f-MWCNT, exposing more active sites for hydrogen adsorption and reducing charge transfer resistance for HER kinetics. The interfacial interaction between MoS2 and CoS2, along with the synergistic effect of rGO/f-MWCNT, results in a highly active catalyst.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Meina Ju, Peng Zhou, Ziting Li, Yuxin Zhao, Xiaoshuang Chen, Jinping Wang, Rui Yang, Chunling Zuo
Summary: In this study, hierarchically vertical and porous MoS2-CoS2 heterojunction nanosheet arrays were designed and fabricated, which can be prepared with a simple procedure and manipulated at unharsh conditions. This electrode demonstrated excellent performance in oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), with low overpotentials, small Tafel slopes, and long stability. The results indicate that this vertical and porous heterojunction nanosheet arrays with hierarchically ultrasmall secondary nanostructures are a promising catalyst for widespread application.
Article
Chemistry, Physical
Wanmeng Dong, Hui Liu, Xiaoxu Liu, Haoyu Wang, Xinru Li, Lejie Tian
Summary: This study presents research on preparing defective-MoS2/rGO heterostructures material and evaluating its performance in hydrogen evolution reaction (HER). The experimental results demonstrate that the prepared catalyst shows outstanding HER performance due to the presence of 1T phase MoS2 and defects in the catalyst structure. Additionally, the interaction between MoS2 and rGO heterostructures plays a significant role in accelerating electron transfer kinetics, ensuring excellent conductivity and structural stability of the obtained catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Ayan Mondal, Harish Reddy Inta, Avishek Roy, Ashok Kumar Mahato, Venkataramanan Mahalingam
Summary: This study presents a strategy to prepare CoS2-MoS2 heterostructures and spheroid-like CoS2 through the sulfurization reaction from the common Co3O4 nanocube precursor. The CoS2-MoS2 heterostructure shows excellent HER activity, while the spheroid-like CoS2 exhibits good OER and HzOR activity. Furthermore, the alkaline electrolyzer constructed using the CoS2-MoS2 heterostructure and spheroid-like CoS2 as cathode and anode respectively, displays excellent performance for HER//OER and HER//HzOR reactions.
ACS APPLIED NANO MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Ankit Sonthalia, Naveen Kumar, Mukul Tomar, Varuvel Edwin Geo, Subramanian Thiyagarajan, Arivalagan Pugazhendhi
Summary: Energy is crucial for the economic development of any country, but developing countries often rely on imported oil. However, the fluctuating oil prices and environmental concerns associated with fossil fuels are major issues. To address these problems, developing countries have started investing in solar and wind power, and are exploring hydrogen and methanol as future energy resources.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Article
Chemistry, Inorganic & Nuclear
S. Supriya, Guddekoppa S. Ananthnag, T. Maiyalagan, Gurumurthy Hegde
Summary: In this study, porous nanocarbon spheres (PNCSs) were prepared from kitchen waste and used for metal and oxidant free degradation of azo compounds. The PNCSs demonstrated effective catalytic performance in the reductive degradation of azo dyes with hydrazine hydrate, achieving rapid degradation and successful reuse of the resulting amines.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Materials Science, Ceramics
K. Ram Kumar, T. Maiyalagan
Summary: This study reports the preparation of iron-nickel sulphide-based catalysts and their composites with MWCNTs for electrocatalytic water oxidation. The composite exhibits superior electrochemical performance compared to the pure catalyst, attributed to the higher surface area, conductivity of the MWCNTs, and the synergistic effect of FeNiS and MWCNTs. This work paves the way for the development of highly efficient and promising non-precious metal catalysts for electrocatalytic water oxidation.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
S. Kiran, M. Leenus Jesu Martin, Ankit Sonthalia, Edwin Geo Varuvel
Summary: The demand for energy is increasing every year, while the use of fossil fuels has led to a rise in carbon dioxide levels and global warming. Therefore, alternatives such as biomass and waste-derived fuels are being explored. In this study, waste lubrication oil was pyrolyzed to obtain a diesel-like fuel with high conversion efficiency, and the blend of this fuel with diesel showed improved engine performance with reduced emissions. Additionally, the introduction of gaseous hydrogen further enhanced the thermal efficiency of the diesel engine while reducing HC, CO, and smoke emissions, although NOx emissions increased. This study demonstrates the suitability of the combination of pyrolyzed waste lubricant and hydrogen as a fuel for unmodified diesel engines.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Sadashiva Lalsangi, V. S. Yaliwal, N. R. Banapurmath, Manzoore Elahi M. Soudagar, Dhinesh Balasubramanian, Ankit Sonthalia, Edwin Geo Varuvel, Makatar Wae-Hayee
Summary: The present work investigates the effects of hydrogen injection timing and injection duration on combustion and emissions of a dual fuel (DF) mode CI engine. The results indicate that the optimal injection timing and injection duration were found to be 10 deg. aTDC and 60 deg. CA respectively. Using hydrogen in the diesel-PG combination resulted in improved BTE, reduced smoke, HC, and CO emissions, and increased NOx emissions compared to DiSOME and WFOME supported DF operation. Satisfactory operation was observed with DiSOME-hydrogen enriched PG combustion.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
K. Pradeeswari, A. Venkatesan, P. Pandi, T. Maiyalagan, R. Mohan Kumar
Summary: Pure, zinc and vanadium-doped titanium dioxide nanoparticles were synthesized through non-aqueous sol-gel route for the application of electrode materials in supercapacitors. The synthesized samples showed single anatase phase, high crystallinity, and confirmed functional groups. The electrode materials exhibited good capacitive behavior and rate performance.
Article
Chemistry, Physical
Elango Balaji, Himadri Tanaya Das, T. Maiyalagan, Nigamananda Das
Summary: This study successfully recovered aluminum from discarded vaccine bottle caps using the leaching method and improved the conductivity of the resulting metal oxides by adding carbon. The synthesized Al2O3/C particles were applied as an electrode in a supercapacitor, demonstrating good electrochemical properties. Additionally, the recycling and reuse of the Al2O3/C electrode in a Na-ion capacitor application have significant implications for environmentally-friendly and cost-effective energy storage systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
S. Silambarasan, T. Maiyalagan
Summary: In this study, dopamine-derived nitrogen-doped carbon was coated on spinel phase MnCo2O4 nanospheres. The electrochemical performance of the MnCo2O4@Nitrogen-doped carbon electrode material was analyzed, showing high specific capacitance and excellent cyclic stability. The composite's enhanced performance can be attributed to the synergistic effect between nitrogen-doped carbon and porous MnCo2O4 spheres. Moreover, an asymmetric supercapacitor device was fabricated, achieving high energy density and good capacitance retention.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Applied
Ashlay George, Anila Rose Cherian, Biju Jacob, Anitha Varghese, Thandavarayan Maiyalagan
Summary: In this study, a new molecularly imprinted polymer detector was developed for the rapid and selective detection of tartrazine. The sensor showed high sensitivity, low detection limit, and the ability to distinguish target analyte from interferants selectively.
Article
Chemistry, Multidisciplinary
Y. Chandra Sekhar, P. Raghavendra, P. Chandana, T. Maiyalagan, L. Subramanyam Sarma
Summary: Interfacing non-noble metals with noble metal can balance efficient adsorption and oxidation reactions in fuel cell systems. In this study, copper was interface with palladium and deposited onto reduced graphene oxide (RGO) support using a one-pot chemical reduction method. The results showed that the bimetallic Pd-Cu/RGO catalyst exhibited higher electrochemical activity for methanol electro-oxidation compared to Pd/RGO and commercial Pd/C catalysts.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Green & Sustainable Science & Technology
M. Bhavisha, S. Balamurugan, S. A. Ashika, N. J. Venkatesha, T. Maiyalagan, A. Sakthivel
Summary: A series of copper-doped perovskite strontium ferrites were successfully prepared and characterized. The presence of iron and copper ions, as well as oxygen vacancies, was confirmed. The formation of nanoparticles was observed by scanning electron microscopy. The catalytic test results demonstrated that the synergy between copper and oxygen vacancies facilitated the hydroxylation reaction of anisole.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Physical
Sathiyamoorthi Ramalingam, M. Naresh Babu, Yuvarajan Devarajan, M. Dinesh Babu, Edwin Geo Varuvel
Summary: This study investigates the performance and combustion characteristics of a dual fuel engine using hydrogen and fuel blended with multi-walled multi-additive nanotubes. The results show that hydrogen enrichment improves combustion efficiency, reduces fuel consumption, and lowers emissions. Furthermore, the addition of multi-walled nanotubes acts as a catalyst, enhancing combustion and overall engine performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Dinesh Kumar Madheswaran, S. Vengatesan, Edwin Geo Varuvel, T. Praveenkumar, Selvaraj Jegadheeswaran, Arivalagan Pugazhendhi, J. Arulmozhivarman
Summary: This review critically examines the application of nanofluids as coolants in PEMFCs and elucidates their thermal efficiency enhancement mechanisms. The findings reveal remarkable enhancements in heat transfer and the potential to revolutionize cooling systems, but challenges and further research are also identified.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Venkatachalam Ravikumar, Duraisamy Senthilkumar, Suresh Vellaiyan, Chidambaram Ganapathy Saravanan, Malaiperumal Vikneswaran, Femilda Josephin Joseph Shobana Bai, Edwin Geo Varuvel
Summary: In this study, the optimization of biodiesel production process resulted in improved properties and fatty acid content of biodiesel. Suitable vegetable oils and new coating materials were also explored for sustainable agricultural and ecological development.
Article
Energy & Fuels
Boopathi Duraisamy, Kandasamy Velmurugan, V. S. Karuppannan Venkatachalapathy, Dinesh Kumar Madheswaran, Edwin Geo Varuvel
Summary: Biomass-based biofuel production, specifically Prosopis juliflora seed-derived vegetable oil (JFME), blended with 20% decanol, shows potential as an alternative fuel for CI engines. This combination achieves a brake thermal efficiency of 29.9% at full load, with reduced emissions of NO, smoke, and HC compared to diesel. The addition of decanol improves combustion, resulting in higher performance and faster heat release rates.
