Article
Physics, Applied
Marie-Luise Braatz, Nils-Eike Weber, Barthi Singh, Klaus Muellen, Xinliang Feng, Mathias Klaeui, Martin Gradhand
Summary: In this study, the structural and electronic properties of co-doped graphene were analyzed using Raman spectroscopy, magneto-transport, and Hall measurements. The results demonstrate the challenges in understanding the microscopic properties of graphene beyond simple preparation methods, as the introduction of dopants can have complex effects. Additionally, the inhomogeneities across individual graphene sheets pose challenges in interpreting measurements.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Gil-Ryeong Park, Seung Geun Jo, Anuraj Varyambath, Jeonghyun Kim, Jung Woo Lee
Summary: Nitrogen-doped reduced graphene oxide with Pd4.7Ru nanoparticles showed efficient catalytic activity in oxygen reduction reaction, with pyridinic nitrogen atoms acting as anchoring sites for particle bonding. The optimal composition of Pd and Ru at 4.7:1 ratio exhibited high durability and excellent ORR activity, making it a potential candidate for fuel cell applications.
Article
Chemistry, Physical
Yu Zou, Lu Wen, Xiaoqiong Bian, Yongfan Zhang, Wei Lin, Shuping Huang, Kaining Ding
Summary: Based on density functional theory calculations, it was found that Mo atoms serve as the real active sites in the MoFeS4/GR catalyst, allowing for nitrogen fixation with good selectivity. Charge was identified as the main factor affecting the catalyst's nitrogen fixation activity. The role of Mo atoms is to provide electrons while Fe atoms transport electrons in the catalyst.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Fatima Nasim, Hassan Ali, Amir Waseem, Muhammad Amtiaz Nadeem, Muhammad Arif Nadeem
Summary: A non-noble metal-based catalyst with comparable activity to conventional noble metal catalysts is successfully synthesized through a simple synthetic strategy. Acid treatment significantly enhances the electrocatalytic activity, and the catalyst demonstrates excellent durability and methanol tolerance. The enhanced activity is attributed to the synergistic effect of the carbon matrix and encapsulated nanoparticles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Runjia Lin, Liqun Kang, Karolina Lisowska, Weiying He, Siyu Zhao, Shusaku Hayama, Graham J. Hutchings, Dan J. L. Brett, Furio Cora, Ivan P. Parkin, Guanjie He
Summary: In this study, an approach based on construction-driven principle is proposed for the design of electrocatalysts, which can achieve selectivity of the 2e(-)-pathway in the oxygen reduction reaction (ORR), thus improving both activity and selectivity of the catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Malgorzata Skorupska, Anna Ilnicka, Jerzy P. Lukaszewicz
Summary: This study presents a facile method of preparing nitrogen-doped graphene foam in a microwave reactor and investigates the influence of solvent type and microwave reactor holding time. The obtained N-doped graphene materials were characterized using various methods. The materials showed high activity towards ORR, with the tested non-Pt materials achieving a number of electrons reaching 3.46.
SCIENTIFIC REPORTS
(2021)
Article
Biochemistry & Molecular Biology
Tongchang Liu, Xinmeng Hao, Jiaqi Liu, Pengfei Zhang, Jiaming Chang, Hong Shang, Xuanhe Liu
Summary: Two graphdiyne materials, GDY nanotube and nitrogen-doped GDY (NGDY) nanotube, were prepared via cross-coupling reactions on the surface of Cu nanowires. As metal-free catalysts, their electrocatalytic activities for ORR were demonstrated, with NGDY nanotube exhibiting superior performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Kee Chun Poon, Wei Yang Wan, Haibin Su, Hirotaka Sato
Summary: The study reports a simple one-step electroless reduction synthesis of amorphous phosphorus-doped graphene (RGO-P), which showed enhanced electrocatalytic performance for the oxygen reduction reaction (ORR). The amorphous nature of RGO-P was found to be essential for its high catalytic activity compared to crystalline reduced graphene oxide (RGO).
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Multidisciplinary Sciences
Malgorzata Skorupska, Anna Ilnicka, Jerzy P. Lukaszewicz
Summary: In this study, a facile method was developed to obtain heavy-metal-free electrode materials with effective catalytic activity in the oxygen reduction reaction (ORR). Nitrogen-doped graphene foams prepared at higher carbonization temperatures showed increased catalytic activity in ORR due to the presence of more active sites. The research highlights the importance of nitrogen content and carbonization temperature in improving the catalytic activity of electrode materials for ORR.
SCIENTIFIC REPORTS
(2021)
Article
Energy & Fuels
Renjie Liu, Yuxin Wang, Wei Zheng, Hui Zhang, Zhongyi Zhang
Summary: The novel catalyst (FeCoP2-CNC) is constructed by incorporating bimetallic phosphide into a hybrid carbon substrate. The incorporation of ultrafine cellulose fibers optimizes the structures associated with the active sites. The increased graphitic-N and metal-N species in the carbon matrix, along with the enlarged specific surface area, enhance the performance of catalyzing oxygen reduction reaction. The increased proportion of surface metal hydroxide active sites improves the performance of catalyzing oxygen evolution reaction. The FeCoP2-CNC bifunctional catalyst exhibits excellent performance in a rechargeable zinc-air battery, achieving an excellent power density (76.9 mW cm-2) and cycling over 45 hours. Integrated into practical devices, the solid-state zinc-air batteries show great potential in power applications. Efficient approaches to enhance the performance of bifunctional catalysts are provided, promoting the application of zinc-air batteries.
Article
Chemistry, Inorganic & Nuclear
Xun He, Jun Li, Ruizhi Li, Donglin Zhao, Longcheng Zhang, Xianchang Ji, Xiaoya Fan, Jie Chen, Yan Wang, Yongsong Luo, Dongdong Zheng, Lisi Xie, Shengjun Sun, Zhengwei Cai, Qian Liu, Ke Ma, Xuping Sun
Summary: In this study, Fe3O4 nanoparticles decorated TiO2 nanoribbon array on titanium plate (Fe3O4@TiO2/TP) was developed as an efficient electrocatalyst for NO3- reduction to produce NH3. Fe3O4@TiO2/TP achieved a high NH3 yield and Faradaic efficiency in 0.1 M phosphate-buffered saline and 0.1 M NO3- electrolyte, and demonstrated excellent stability during long-time electrolysis.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Jie Wu, Jia-Hui Li, Yang-Xin Yu
Summary: The study demonstrates that V-doped h-BP monolayer is a promising catalyst for NO3- reduction reactions, showing low overpotential and high thermal stability, shedding light on the atomic mechanisms behind the NO3- reduction process.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Esmaeil Zaminpayma, Payman Nayebi, Mohsen Emami-Razavi
Summary: The transport properties and rectification behavior of junctions containing armchair graphene nanoribbons with double vacancy defects or nitrogen doping in three different sizes were studied. Results showed that the presence of double vacancy defects and nitrogen doping can alter the behavior of the devices, with significant rectification observed in the 9-atom size devices.
Article
Chemistry, Physical
Hongliang Peng, Diancheng Duan, Siyan Liu, Jiaxi Liu, Lixian Sun, Pengru Huang, Chunfeng Shao, Kexiang Zhang, Huanzhi Zhang, Xiaogang Xue, Fen Xu, Yongjin Zou, Yalin Liu, Xinlong Tian, Federico Rosei
Summary: The carbon-based catalyst C-MP-FeCo with a graphene nanoribbon structure shows excellent electrocatalytic performance, increasing the power and efficiency of zinc-air batteries while also enhancing durability.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Applied
Soyoon Jeong, Seonghee Kim, Hyunjee Son, Oi Lun Li
Summary: The increasing demand for continuous and eco-friendly alternative energy has led to interest in aluminum-air (Al-air) batteries due to their high energy density and safety. However, the slow oxygen reduction reaction (ORR) rate in alkaline electrolytes remains a challenge that affects the efficiency of the Al-air battery. A transition metal electrocatalyst, Co@N/GNP, consisting of cobalt nanoparticles encapsulated with Ndoped graphene nanoplatelets, was synthesized using plasma engineering. The Co@N/GNP exhibited outstanding catalytic performance in an alkaline electrolyte and showed excellent performance as a cathode catalyst in practical Al-air batteries with a peak power density of 143 mW cm-2.
Article
Energy & Fuels
Gopa Nandikes, Shaik Gouse Peera, Lakhveer Singh
Summary: Microbial fuel cells (MFCs) are a system for producing green energy through the microbial degradation of organic contaminants in wastewater. The efficiency of MFCs depends on the cathode oxygen reduction reaction (ORR). Platinum-based electrodes are considered the most advanced ORR catalyst, but their scarcity and high cost present challenges for commercialization. Perovskite-oxide-based nanocomposites have recently emerged as a potential alternative catalyst.
Review
Energy & Fuels
Devi Radhika, Archana Shivakumar, Deepak R. Kasai, Ravindranadh Koutavarapu, Shaik Gouse Peera
Summary: This review investigates the various applications of microbial electrolysis cells (MECs), including energy generation and recycling, contaminant removal, and resource recovery. The review examines new concepts, configuration optimization, electron transfer pathways, and coupling with other technologies. The goal of the review is to provide an understanding of the most recent developments in MEC technologies and applications for researchers and engineers.
Article
Environmental Sciences
Hyuk Jun Kwon, Haerul Hidayaturrahman, Shaik Gouse Peera, Tae Gwan Lee
Summary: Microplastic pollution is a global issue that has gained extensive attention due to increased plastic usage and its impact on human and aquatic life. Wastewater treatment plants play a crucial role in removing microplastics, with different treatment techniques showing varying levels of efficiency. This study investigates the characteristics and removal efficiency of microplastics in three different types of wastewater treatment plants. The results reveal that wastewater treatment plant B demonstrates good performance in microplastic removal; however, a significant amount of microplastics is still being released into rivers.
Review
Chemistry, Analytical
Shaik Gouse Peera, Ravindranadh Koutavarapu, Liu Chao, Lakhveer Singh, Govindhasamy Murugadoss, Gaddam Rajeshkhanna
Summary: MXenes, a novel family of 2D transition metal carbide, nitride and carbonitride materials, have gained tremendous interest as potential electrocatalysts for hydrogen evolution reaction (HER). This review article summarizes recent developments in MXene-based electrocatalysts synthesis and HER performance, and evaluates the superiority of MXene-based catalysts over traditional Pt/C catalysts.
Article
Chemistry, Physical
Govindhasamy Murugadoss, Jayavel Prakash, Manavalan Rajesh Kumar, Asma A. Alothman, Mohamed A. Habila, Shaik Gouse Peera
Summary: SnS and Eu-doped SnS quantum dots were synthesized by a facile chemical co-precipitation method and showed efficient photocatalytic degradation of organic dye molecules under visible light irradiation. The presence of Eu3+ in the SnS lattice led to smaller crystallite size, higher surface area, and unique morphological features, resulting in enhanced photodegradation efficiency and high stability.
Article
Chemistry, Physical
Ankit Kumar, S. Shankara Narayanan, Bhim Sen Thapa, Soumya Pandit, Kumud Pant, Anoop Kumar Mukhopadhyay, Shaik Gouse Peera
Summary: A novel strategy for designing an efficient and environmentally friendly anode for energy generation from wastewater is reported in this study. Adding carbon dots to microbial fuel cells (MFC) enhances electron recovery from organics oxidation and promotes efficient biofilm formation.
Article
Chemistry, Physical
Murugesan Praveen Kumar, Moorthy Sasikumar, Arunachalam Arulraj, Venugopalan Rajasudha, Govindhasamy Murugadoss, Manavalan Rajesh Kumar, Shaik Gouse Peera, Ramalinga Viswanathan Mangalaraja
Summary: By using the electrochemical deposition method, NiFe layered double hydroxide (LDH) with controlled phase and surface morphology was obtained as a highly active and stable oxygen evolution catalyst. It showed excellent catalytic performance in an alkaline medium and exhibited unpredictable long-time stability.
Article
Chemistry, Physical
Daomiao Wang, Luya Jin, Meiling Liu, Tae Gwan Lee, Shaik Gouse Peera, Chao Liu
Summary: This paper investigates the potential of graphene-supported lanthanum oxide clusters (La2O3-Gra) as a bifunctional electrocatalyst for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). The results show that the optimal catalytic site (up-down1) of the most stable configuration (O-Gra-1) modified by OH group exhibits outstanding bifunctional catalytic activity with eta ORR of 0.51 V and eta OER of 0.52 V, which can be compared to commercial Pt-based ORR catalysts and Ru/Ir-oxides OER catalysts. Furthermore, a strong scale-dependent relationship between the adsorption free energy (Delta Gads) of reaction intermediates is observed, leading to volcano plots between catalytic activity and Delta Gads, providing a valuable description for future performance prediction of structurally similar catalysts.
MOLECULAR CATALYSIS
(2023)
Article
Biochemistry & Molecular Biology
Sunil Chauhan, Ankit Kumar, Soumya Pandit, Anusha Vempaty, Manoj Kumar, Bhim Sen Thapa, Nishant Rai, Shaik Gouse Peera
Summary: The current study investigated the development and application of lithium-doped zinc oxide impregnated polyvinyl alcohol proton exchange membrane separator in a single-chambered microbial fuel cell. Physiochemical analysis was performed to characterize the synthesized Li-doped ZnO. The optimized PVA-ZnO-Li separator showed higher power generation and improved proton conductivity in the MFC.
Article
Chemistry, Physical
Shaik Gouse Peera, Chao Liu, Arunchander Asokan, Matthew E. Suss
Summary: Discovery of cheap transition metal-based electrocatalysts for the oxygen reduction reaction (ORR) is urgently needed to replace the traditional Pt/C catalyst. In this study, Cu nanoparticles encapsulated with nitrogen-doped carbon (Cu@NC) were synthesized and demonstrated excellent and durable ORR catalytic activity. The optimized Cu@NC catalyst exhibited superior ORR performance compared to the state-of-the-art Pt/C catalyst, displaying higher onset potential and half-wave potential. Furthermore, the Cu@NC catalyst showed outstanding stability and tolerance to CO and methanol, making it a potential alternative to Pt/C catalyst for alkaline fuel cells and metal-air cell cathodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Electrochemistry
Yiwen Liu, Mengqi Liao, Yuting Hu, Tae-Gwan Lee, Ravindranadh Koutavarapu, Shaik Gouse Peera, Chao Liu
Summary: In this study, the catalytic performance of single-atom catalysts (SACs) systems consisting of scandium (Sc) and different N/C coordination environments (ScNxC3-x@SACs and ScNxC4-x@SACs) was systematically examined for the oxygen evolution reaction (OER). The results showed that ScNxC3-x@SACs and ScNxC4-x@SACs systems become more stable with increasing N atom doping concentration. ScN3, ScN3C, and ScN4 with better stability were selected for further research. ScN3 and ScN4 formed Sc(OH)(2)N-3 and Sc(OH)(2)N-4 structures with double-hydroxyl groups as ligands, while the strong adsorption of OH species by ScN3C caused structural instability. Sc(OH)(2)N-4 was identified as a stable and promising OER catalyst with easy desorption of O-2 and good cycle performance.
Article
Chemistry, Physical
Chao Liu, Daomiao Wang
Summary: The catalytic performance of rare earth LaNxC4-x-doped graphene (LaNxC4-x-Gra) catalysts in the oxygen electrode reaction has been extensively discussed in this paper. The results demonstrate that LaN2C2hex-Gra exhibits excellent OER activity in the alkaline environment with an original η OER of 0.68 V and a bifunctional activity with an η ORR of 0.56 V accompanied by OH ligands modified. Impressively, LaN2C2hex-Gra also shows remarkable OER activity in the acidic environment with an η of 0.68 V. Finally, the introduced band center scale relationship can be used to rapidly evaluate catalytic activity, providing guidance for the development of efficient rare earth single atomic catalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Daomiao Wang, Mengqi Liao, Luya Jin, Kang Wu, Shaik Gouse Peera, Chao Liu
Summary: This article investigates the bifunctional activity of La single-atom catalysts with N/C coordination (LaNxC6-x@Gra) and finds that the N/C coordination has a significant influence on the working stability and catalytic activity. The correlation between the f-orbital center and the overpotential serves as a useful tool for predicting catalytic performance. The LaNxC6-x@Gra catalyst exhibits remarkable bifunctional activity and shows promise as a bifunctional electrocatalyst in oxygen electrodes.
INORGANIC CHEMISTRY
(2023)
Review
Chemistry, Inorganic & Nuclear
Shaik Gouse Peera, Rahul S. Menon, Sumanta Kumar Das, Akram Alfantazi, K. Karuppasamy, Chao Liu, Akhila Kumar Sahu
Summary: Doped carbon materials, especially F-doped carbon catalysts, have gained significant attention as metal-free catalysts for oxygen reduction reactions and as corrosion-resistant supports for Pt and non-Pt nanoparticles. F-doped carbon materials possess unique properties and greatly improve the activity and durability of the ORR compared to N-doped carbon materials. The high electronegativity of F-doping can efficiently modify the electronic band structure of carbon materials, favoring the ORR. This review systematically discusses the effect of F-doping/F co-doping on the electrocatalytic reduction of O2 in acidic and alkaline conditions, the stability and durability of fuel cell catalysts, and provides guidelines for working with F-doped carbons. Future research directions on F-doped carbons are also proposed to bridge the gap between laboratory-scale assessments and commercial applications.
COORDINATION CHEMISTRY REVIEWS
(2024)
