Article
Chemistry, Multidisciplinary
Tingting Wang, Pengyan Wang, Wenjie Zang, Xin Li, Ding Chen, Zongkui Kou, Shichun Mu, John Wang
Summary: A hollow nanoframing strategy was devised for interconnected Co3O4-Mo2N heterostructures, leading to enhanced bifunctional catalytic activities due to the optimized heterointerface with strong electron interaction and favorable H2O/H* adsorption energies.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yang Yang, Shengzhong Zhang, Zhaoyang Song, Hongtao Wang, Yanpeng Zhang, Dequan Fan, Fangzhou Hu, Ying Yu, Ying Zhang
Summary: This study proposes a heterogeneous NiFe-sulfide electrode for efficient OER process in alkaline seawater. The electrode demonstrates excellent catalytic activity, long-term stability, and high selectivity towards OER.
Article
Chemistry, Physical
Narasimman Rajaram, Jnanapriya Gopi, Vishnu Sukumaran Nair, Sujatha Sarojini Amma, Sinthai Appusamy Ilangovan
Summary: In this study, the effect of transition metal cation substitution on nickel sulfide for electrochemical water-splitting was investigated. The results showed that Fe-substituted Ni(x)S(y) exhibited better oxygen evolution reaction characteristics, while Co-substituted Ni(x)S(y) showed better hydrogen evolution reaction characteristics. These findings are significant for the development of efficient and low-cost electrocatalysts for water splitting.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Ragunath Madhu, Arun Karmakar, Sangeetha Kumaravel, Selvasundarasekar Sam Sankar, Krishnendu Bera, Sreenivasan Nagappan, Hariharan N. Dhandapani, Subrata Kundu
Summary: The study developed a Co-doped RuO2 nanorod material as an OER electrocatalyst in universal pH conditions, exhibiting lower overpotential values and smaller Tafel slopes in alkaline environments, showing promising performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Jing Li, Xiaoxuan Feng, Weida Zhong, Mingjun Zhou, Min Qian, Jianping Xu, Huang Pang, Lin Xu, Jun Yang, Yawen Tang
Summary: The rational exploration of earth-abundant, highly active and stable non-noble metal electrocatalysts for oxygen evolution reaction (OER) is crucial for renewable energy technologies. A novel nanoreactor, Co/Co2P@N-CHRDs, was designed as an efficient OER electrocatalyst through compositional manipulation and nano-architectural design. The Co/Co2P metal/semiconductor heterojunctions and the carbon matrix with open interior voids enhanced charge transfer rate, improved adsorption behaviors, and stabilized active sites, resulting in distinguished OER performance and long-term durability. This study provides inspiration for future affordable and practicable electrocatalyst design by simultaneously implementing the Mott-Schottky effect, nano-hollowing design, and carbon hybridization.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ragunath Madhu, Arun Karmakar, Subrata Kundu
Summary: In this study, three different morphologies of CoCr2O4 were synthesized for the first time and used as electrocatalysts for the oxygen evolution reaction (OER) in alkaline and acidic environments. The CoCr2O4 Mic exhibited higher catalytic activity and better durability in both environments, mainly attributed to its optimized Co-O bond energy. This study provides a new strategy for electrochemical conversion and energy storage applications.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Geng Wu, Xiao Han, Jinyan Cai, Peiqun Yin, Peixin Cui, Xusheng Zheng, Hai Li, Cai Chen, Gongming Wang, Xun Hong
Summary: Strain modulation of noble metal nanosheets through constructing amorphous-crystalline phase boundaries enhances their catalytic activities, particularly towards the hydrogen evolution reaction. By inducing surface tensile strain through in-plane amorphous-crystalline boundaries, the strained nanosheets display substantially improved intrinsic activity, demonstrating a general approach to boost hydrogen evolution performance of various noble metal nanosheets like Ir, Ru, and Rh.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Boxiao Fu, Vasileios Tzitzios, Qiancheng Zhang, Brian Rodriguez, Michael Pissas, Maria Veronica Sofianos
Summary: In this study, manganese mono-boride nanoflakes were synthesized using a simple one-pot chemical reduction method at room temperature. The influence of specific surface area and boron content on the magnetic and electrocatalytic properties of the synthesized nanoflakes was investigated. The sample with the highest specific surface area and boron content showed the best magnetic and electrocatalytic properties in the HER, while the sample with the lowest specific surface area and boron content exhibited the best electric conductivity and electrocatalytic properties in the OER.
Article
Chemistry, Multidisciplinary
Hongjing Wang, Xu Mu, Qiqi Mao, Kai Deng, Hongjie Yu, You Xu, Xiaonian Li, Ziqiang Wang, Liang Wang
Summary: In this study, we propose a modification strategy of ultrathin and wrinkled Pd metallene using hydrophobic octadecanethiol (Pdene@C18) via Pd-S bonds for efficient nitrogen reduction reaction. The hydrophobic self-assembled monolayer C18 captures more N-2 and inhibits hydrogen evolution reaction, resulting in a high NH3 yield and Faraday efficiency of 27.97 μg h(-1) mg(cat).(-1) and 14.29% respectively under neutral conditions, highlighting the importance of modifying hydrophobic monolayers for efficient nitrogen electro-reduction to ammonia.
CHEMICAL COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Mahrokh Nazari, Mostafa Ghaemmaghami
Summary: Recently, there has been a lot of interest in the development of transition metal-based non-precious-metal electrocatalysts for energy storage and conversion systems. In order to further this subject, it is necessary to make a fair comparison of their performance. This Review investigates the parameters used for the comparison of electrocatalyst activity, and discusses how to identify the specific activity and turnover frequency (TOF) by different methods.
Article
Electrochemistry
Yinling Wang, Wujian Tang, Xue Li, Dandan Wei
Summary: Ternary NiFeZr MOFs were synthesized with high oxygen evolution reaction (OER) activity through a simple solvothermal method. The doping of Zr improved the OER performance of NiFeZr MOFs compared to bimetallic NiFe MOFs, showing better stability on a glass carbon electrode. This study demonstrates the effectiveness of incorporating metals into OER active MOFs to enhance their OER activity.
ELECTROCHIMICA ACTA
(2021)
Review
Chemistry, Multidisciplinary
Mahrokh Nazari, Mostafa Ghaemmaghami
Summary: The development of non-precious-metal electrocatalysts based on transition metals for energy storage and conversion systems has gained significant attention. To ensure the proper development of electrocatalysts, it is necessary to make a fair comparison of their performance. This Review investigates the parameters used for comparing electrocatalyst activity, such as overpotential, Tafel slope, exchange current density, mass activity, specific activity, and turnover frequency. It discusses how to identify specific activity and turnover frequency using electrochemical and non-electrochemical methods, as well as the benefits and uncertainties of each technique, to ensure accurate calculation of intrinsic activity metrics.
Article
Chemistry, Physical
Ying Zhang, Yaoyu Zhang, Zhonglu Guo, Yi Fang, Chengchun Tang, Naihua Miao, Baisheng Sa, Jian Zhou, Zhimei Sun
Summary: This study systematically investigated the electrocatalytic activity of M2B2, M3B4, and M4B6 type MBenes for multifunctional HER, OER, and ORR through first-principles calculations. Ni2B2 and Co3B4 MBenes were found to be promising multifunctional HER/OER/ORR electrocatalysts, while Fe3B4 MBene was expected to be a promising bifunctional electrocatalyst for HER/ORR. The study also established new scaling relations between the adsorption energies of OOH* and O* on MBenes, providing a new approach for the rational design of MBene-based electrocatalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Lei Jin, Qing Wang, Kun Wang, Yuchen Lu, Bingji Huang, Hui Xu, Xingyue Qian, Lida Yang, Guangyu He, Haiqun Chen
Summary: Rational hybridization of NiFe LDH nanosheets with reduced graphene oxide led to the successful synthesis of NiMoO4/NiFe LDH/rGO nanosheets. This novel nanosheet catalyst exhibited excellent electrocatalytic activity for the OER.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Muhammad Awais, Sidra Aslam, Bakhat Ali, Misbah Mirza, Muhammad Safdar
Summary: In this study, K2Nb10W7O47 nanoparticles were synthesized through solvothermal method, which exhibited remarkable electrocatalytic water splitting and supercapacitance properties. The influence of synthesis parameters on the morphology and crystal structure of the nanoparticles was systematically investigated, emphasizing the tailoring of electrocatalytic activity. The as synthesized K2Nb10W7O47 nanoparticles demonstrated excellent electrocatalytic performance for both hydrogen evolution and oxygen evolution reactions, as well as promising energy storage capabilities.
Article
Chemistry, Multidisciplinary
Heramba V. S. R. M. Koppisetti, Sagar Ganguli, Sourav Ghosh, Venkataramanan Mahalingam
Summary: The incorporation of sulfate in pre-annealed Co3O4 plays a pivotal role in boosting the OER activity, leading to enhancements in structural and pore characteristics, resulting in higher geometric OER activity. Sulfate ions alter the microstructure during annealing, providing structures with higher mesoporosity conducive for reactant and product diffusion, ultimately improving catalytic center exposure and geometric OER activity. This study demonstrates that the geometric electrocatalytic OER activity of annealed Co3O4 can be significantly improved compared to its pre-annealed phase, comparable to amorphous Co-hydroxide compounds.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Gouri Tudu, Khushboo S. Paliwal, Sourav Ghosh, Tanmoy Biswas, Heramba V. S. R. M. Koppisetti, Antarip Mitra, Venkataramanan Mahalingam
Summary: The study demonstrated the efficient conversion of epoxides to cyclic carbonates using PABA@α-Fe2O3 nanocatalyst, attributed to synergistic effect between the material and amine group. The recyclability and stability of the catalyst make it a sustainable approach for CO2 utilization.
DALTON TRANSACTIONS
(2022)
Article
Electrochemistry
Debashrita Sarkar, Sagar Ganguli, Ayan Mondal, Venkataramanan Mahalingam
Summary: This study presents sulfur-incorporated iron-doped cobalt silicate nanoparticles that exhibit gradual improvement in electrocatalytic behavior for efficient oxygen evolution reaction. Through experiments, the precatalyst demonstrated lower overpotential and exceptional OER performance, providing new technological support for sustainable fuel generation.
Article
Chemistry, Physical
Heramba V. S. R. M. Koppisetti, Sagar Ganguli, Sourav Ghosh, Harish Reddy Inta, Gouri Tudu, Venkataramanan Mahalingam
Summary: In this study, a Fe-rich OER electrocatalyst was synthesized and achieved significantly higher geometric OER activity through the optimization of synthesis method and the incorporation of a small amount of Ni. The catalyst exhibited low overpotential, low Tafel slope, and high selectivity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Athma E. Praveen, Sagar Ganguli, Debashrita Sarkar, Venkataramanan Mahalingam
Summary: The functional groups of thiol and carboxylate in ligands were found to regulate the phase transformation of nickel phosphides during hydrothermal synthesis. Carboxylate promotes the phase transition from Ni2P to Ni12P5, while thiol inhibits this transformation. Cysteine-capped Ni2P exhibits excellent electrocatalytic activity for both hydrogen evolution and hydrazine oxidation reactions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Sagar Ganguli, Alina Sekretareva
Summary: Direct loading of plasmonic nanostructures onto catalytically inert conductive support materials leads to a Schottky barrier-free architecture. In this study, the effect of the supporting electrode material on the observed photoinduced enhancement was systematically investigated. It was found that local heating due to light absorption by the electrode material itself is the primary source of the significant photoinduced enhancement, and increased interfacial charge transfer at elevated temperatures is the main source of the thermal enhancement.
Article
Chemistry, Multidisciplinary
Gouri Tudu, Sourav Ghosh, Harish Reddy Inta, Heramba V. S. R. M. Koppisetti, Sagar Ganguli, Ashok Kumar Mahato, Venkataramanan Mahalingam
Summary: A Fe-Ni3S4/NiS2 nanocomposite catalyst with high catalytic activity, excellent stability, and good selectivity towards alkaline OER was prepared by a solvothermal method. The catalyst exhibited fast kinetics and low charge transfer resistance, which contributed to the superior performance.
Article
Chemistry, Multidisciplinary
Sagar Ganguli, Ziwen Zhao, Onur Parlak, Yocefu Hattori, Jacinto Sa, Alina Sekretareva
Summary: Plasmon-enhanced electrocatalysis (PEEC) can potentially improve energy conversion compared to conventional electrocatalysis. This study demonstrates the advantages of nano-impact single-entity electrochemistry (SEE) in investigating the intrinsic activity of plasmonic catalysts. It shows that plasmonic effects are the dominant source of photocurrents under SEE experimental conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Athma E. Praveen, Viplove Mishra, Sagar Ganguli, Aditi Chandrasekar, Venkataramanan Mahalingam
Summary: Rational control of the reaction parameters is highly important for synthesizing active electrocatalysts. In this study, a one-step hydrothermal route was reported to synthesize P-incorporated NiCo2S4, and it was found that the inclusion of P caused the formation of NiCo2S4 in a single step. Computational studies showed that incorporating the optimum amount of P increased the stability of the NiCo2S4 lattice. In addition, experimental results demonstrated that P-incorporated NiCo2S4 exhibited excellent activity for hydrazine oxidation and hydrogen production.
INORGANIC CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Andrew J. Bagnall, Sagar Ganguli, Alina Sekretareva
Summary: This review focuses on the mechanisms behind photocurrents observed in plasmon-enhanced electrocatalysis (PEEC) and critically evaluates alternative sources of current enhancement. Guidelines for experimentalists to distinguish between different enhancement mechanisms in PEEC are presented.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Gouri Tudu, Sourav Ghosh, Sagar Ganguli, Heramba V. S. R. M. Koppisetti, Harish Reddy Inta, Venkataramanan Mahalingam
Summary: The study successfully synthesized iron-incorporated pure phase alpha-nickel hydroxide Ni0.8Fe0.2(OH)(2) electrocatalyst, which exhibited efficient and stable characteristics for oxygen evolution reaction. The catalyst demonstrated high OER faradaic efficiency, low Tafel slope, and high mesoporous surface area, contributing to its enhanced catalytic activity.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Sourav Ghosh, Rajkumar Jana, Sagar Ganguli, Harish Reddy Inta, Gouri Tudu, Heramba V. S. R. M. Koppisetti, Ayan Datta, Venkataramanan Mahalingam
Summary: The study focuses on the development of next-generation non-precious electrocatalysts, particularly highlighting a low-cost electrocatalyst designed and developed in an aqueous medium using a ligand-assisted synthetic strategy. Experimental results demonstrate the superior performance of the oxalate ligand-assisted non-oxide electrocatalyst, nickel-cobalt oxalate, optimized for alkaline water oxidation application.
NANOSCALE ADVANCES
(2021)
Article
Engineering, Environmental
Debashrita Sarkar, Khushboo S. Paliwal, Sagar Ganguli, Athma E. Praveen, Dipannita Saha, Venkataramana Mahalingam
Summary: Efficient charge separation upon light irradiation is crucial for determining the photocatalytic activity efficiency. Oxygen vacancy rich Bi2SiO5 nanoparticles were synthesized using a hydrothermal approach to achieve superior charge separation. The incorporation of halide anions led to the generation of oxygen vacancy sites and preferential growth of the monoclinic phase. The synergetic effect of halide ions and oxygen vacancy sites on the surface enhanced the photocatalytic activity of the Bi2SiO5 nanoparticles.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)