Article
Multidisciplinary Sciences
Subal Dey, Fabio Masero, Enzo Brack, Marc Fontecave, Victor Mougel
Summary: Transition metal hydrides play a crucial role in enzymatic processes and catalytic reactions. The formation of these hydrides is a critical challenge. Researchers have discovered that concerted proton-electron transfer mediators can facilitate the electrocatalytic generation of transition metal hydrides, with a synthetic iron-sulfur cluster identified as the most efficient mediator.
Article
Electrochemistry
Sojin Park, Seongjun Hong, Suseong Kim, Jae Hyuk Choi, Su Jin Kang, Jeongyeon Choi, Yeonho Chung, Hakhyun Nam, Yang-Rae Kim
Summary: Two phenothiazine derivatives were synthesized as new redox mediators and compared with conventional mediators. Cyclic voltammetry experiments were performed to investigate the reaction mechanism, reversibility, and stability of the mediators. The number of electrons and protons involved in the redox processes was estimated, and thermodynamic parameters were evaluated based on the electrochemical behavior. The performance of the mediators in the oxidation of reduced nicotinamide adenine dinucleotide was also analyzed, confirming their similarity or superiority to other mediators.
ELECTROCHIMICA ACTA
(2023)
Article
Multidisciplinary Sciences
Lejing Li, Zhuofeng Hu, Yongqiang Kang, Shiyu Cao, Liangpang Xu, Luo Yu, Lizhi Zhang, Jimmy C. Yu
Summary: The authors report a ZnGa2O4 anode with dual active sites to improve selectivity and resist decomposition of H2O2, achieving a peak faradaic efficiency of 82% at low potential.
NATURE COMMUNICATIONS
(2023)
Review
Electrochemistry
Andre Gemunde, Bin Lai, Laura Pause, Jens Kromer, Dirk Holtmann
Summary: This review discusses some of the key research questions regarding the use of redox mediators in microbial electrochemical systems, including the recycling of mediators, limitations in electron transfer rates, metabolic burden, and the interaction sites between mediators and electroactive microorganisms. To simplify the planning of mediator-based bioelectrochemical systems, molecular interaction sites are defined by their redox potential and assigned to specific mediators.
Article
Chemistry, Physical
Guodao Zhang, Jian Liu, Xiaotian Pan, Azher M. Abed, Binh Nguyen Le, H. Elhosiny Ali, Yisu Ge
Summary: Due to limited fossil fuels and bio energies, along with the environmental pollution caused by their combustion, the search for renewable and clean alternative sources is necessary for energy optimization in buildings. Cultivation of microalgae has emerged as an option for biomass production and artificial intelligence is being utilized to assist in this process. Many types of microalgae can grow in different water environments and with extensive studies, cost-effective production of algae-biofuels can be achieved. This review aims to discuss the latest innovations and artificial intelligence approaches for biohydrogen generation from algal towards sustainable energy optimization and greener environment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Ahmad Dawahdeh, Moh'd A. Al-Nimr
Summary: This paper proposes a system that utilizes a thermally regenerative electrochemical cycle to extract wasted heat from biofuel stoves, providing a simple and low-cost solution for energy problems in remote areas.
Article
Energy & Fuels
Jian Liu, Fengcheng Zhou, Azher M. Abed, Binh Nguyen Le, Liting Dai, H. Elhosiny Ali, Mohamed Amine Khadimallah, Guodao Zhang
Summary: The increase in population and energy demand has led to the exploration of alternative energy sources. The use of biofuels and renewable energy has gained attention due to the negative environmental impacts of fossil fuels. Macroalgae, rich in carbohydrates, lipids, and proteins, have emerged as a promising source for biofuel production. Various biotechnological methods, including fermentation, anaerobic digestion, burning, pyrolysis, and hydrothermal liquefaction, can convert macroalgae into valuable gaseous, liquid, and solid compounds. This review highlights the methods and studies on macroalgae-based energy generation, the application of artificial intelligence in biofuel production, and proposes solutions to overcome existing challenges for a sustainable environment.
Article
Chemistry, Physical
Ji Hyun Yang, Hyeong Ryeol Kim, Ja Hyun Lee, Joon-Hyung Jin, Hee Uk Lee, Seung Wook Kim
Summary: The study aimed to enhance power output by optimizing electrical communication for GOx on a composite surface and found that immobilized GOx at a concentration of 40:80 mM EDC:NHS exhibited the highest activity with a power density of 2.24 mWcm(-2) under optimal conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Fangfang Peng, Junfeng Xiang, Huisheng Qin, Bingfeng Chen, Ran Duan, Wenling Zhao, Shiqiang Liu, Tianbin Wu, Wenli Yuan, Qian Li, Jikun Li, Xinchen Kang, Buxing Han
Summary: This study reports a highly selective electro-oxidation method for the synthesis of benzylic alcohols from benzylic C-H in an ionic liquid-based solution. Under specific conditions, the selectivity of the reaction can reach 95.7%. Mechanistic investigation reveals the crucial roles of proton-coupled electron transfer and low-barrier hydrogen bonds in the reaction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Zichen Wang, Xiaoyi Li, Fenglei Sun, Wenze Wu, Rui Huang
Summary: Anionization using constant potential can enable the 2nd generation molecular motors to operate under ground state uni-directionally and free from ultraviolet light.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Biotechnology & Applied Microbiology
D. Daniela Maza, Silvana C. Vinarta, Estefani Garcia-Rios, Jose M. Guillamon, Manuel J. Aybar
Summary: Single cell oils are a promising source of oils for various industrial applications, offering advantages such as circumventing the food vs. fuel controversy, independence from climate and seasonal variations, and having potential for suitable growth parameters. In this study, a red yeast strain showed high lipid production potential and fuel properties in good agreement with international biodiesel standards.
JOURNAL OF BIOTECHNOLOGY
(2021)
Article
Environmental Sciences
Guangyi Zhang, Danxin Liang, Zisheng Zhao, Jingsa Qi, Long Huang
Summary: The degradation of TCH in a dual chamber microbial fuel cells (MFCs) led to effective COD removal, with low concentrations of TCH producing electron mediators which improved the performance of the MFC system. Enriched microbial communities played a dominant role in TCH degradation and power generation, with certain electrochemical active bacteria showing tolerance to TCH.
ENVIRONMENTAL RESEARCH
(2022)
Review
Chemistry, Analytical
Kasparas Kizys, Antanas Zinovicius, Baltramiejus Jakstys, Ingrida Bruzaite, Evaldas Balciunas, Milda Petruleviciene, Arunas Ramanavicius, Inga Morkvenaite-Vilkonciene
Summary: This review discusses the development of microbial biofuel cells and how similar principles apply to bioelectronic device development. Microorganism-based amperometric biosensors, with their low specificity, can be used to design microbial biofuel cells that can consume a wider range of chemical fuels. Charge transfer efficiency is a major challenge in biofuel cell development, which can be improved using nanomaterials and specific redox mediators. Additionally, the biocompatibility of conducting polymers with microorganisms is explored, including ways to modify cell-walls/membranes and improve charge transfer efficiency for biofuel cell design.
Article
Thermodynamics
Dongliang He, Xin Tang, Mirza Abdullah Rehan, Yashun Lu, Guiqiang Li
Summary: The significant attention garnered by thermally regenerative electrochemical cycles (TRECs) is due to their remarkable heat to electricity efficiency, which addresses energy challenges associated with waste heat recovery and refrigeration. Current research introduces a novel concept by employing rotating layers of TREC units to achieve continuous and highly efficient energy output. The findings show that the device is capable of generating significant net work and achieves an impressive heat-to-electricity efficiency.
APPLIED THERMAL ENGINEERING
(2024)
Review
Chemistry, Applied
Jing Du, Yuan-Yuan Ma, Huaqiao Tan, Zhen-Hui Kang, Yangguang Li
Summary: Electrochemical CO2 reduction to value-added fuels and chemicals is an effective strategy due to its high efficiency and economic feasibility. Polyoxometalates (POMs) are promising candidates for efficient CO2RR electrocatalysts and play significant roles in the process and performance of catalytic CO2RR.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Biochemistry & Molecular Biology
Yolina Hubenova, Rumyana Bakalska, Mario Mitov
BIOELECTROCHEMISTRY
(2018)
Article
Electrochemistry
Yolina Hubenova, Eleonora Hubenova, Blagoy Burdin, Daria Vladikova, Mario Mitov
ELECTROCHIMICA ACTA
(2019)
Article
Chemistry, Physical
Elitsa Chorbadzhiyska, Ivo Bardarov, Yolina Hubenova, Mario Mitov
Article
Biochemistry & Molecular Biology
Yolina Hubenova, Eleonora Hubenova, Mario Mitov
BIOELECTROCHEMISTRY
(2020)
Article
Electrochemistry
Mario Mitov, Ivo Bardarov, Elitsa Chorbadzhiyska, Krassimir L. Kostov, Yolina Hubenova
Summary: The study presents the proof-of-principle of metal recovery using microbial electrochemical snorkel (MES) for the first time. Experimental comparison of MES setups with and without proton exchange membrane (PEM) isolation and MFC revealed that MES shows superior performance in copper removal and recovery efficiency, surpassing MFC in copper regeneration.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Yolina Hubenova, Galin Borisov, Evelina Slavcheva, Mario Mitov
Summary: A novel strain of Gram-positive bacteria Paenibacillus profundus YoMME was identified to possess exoelectrogenicity, capable of generating electricity. The bioanodes formed by this bacteria showed good performance in microbial fuel cells and microbial electrolysis cells, assisting electrolysis processes at a significantly lower voltage to produce hydrogen gas.
BIOELECTROCHEMISTRY
(2022)
Article
Electrochemistry
Mario Mitov, Elitsa Chorbadzhiyska, Ivo Bardarov, Krassimir L. Kostov, Yolina Hubenova
Summary: This study demonstrates the use of microbial electrochemical snorkel (MES) for silver recovery from aqueous solutions for the first time. The results show that MES mode is more advantageous than MFC mode in terms of silver removal and recovery.
ELECTROCHIMICA ACTA
(2022)
Article
Microbiology
Yolina Hubenova, Eleonora Hubenova, Yordan Manasiev, Slavil Peykov, Mario Mitov
Summary: In this study, the draft genome sequence of Paenibacillus profundus YoMME, isolated from the anodic biofilm of a sediment microbial fuel cell, was reported. This bacterium is recognized as one of the few exoelectrogenic Gram-positive bacteria capable of extracellular electron transfer.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2022)
Article
Biochemistry & Molecular Biology
Yolina Hubenova, Elitsa Chorbadzhiyska, Krassimir L. Kostov, Mario Mitov
Summary: The applicability of microbial electrochemical technologies for gold recovery was investigated. It was found that the microbial electrochemical snorkel (MES) mode outperforms the traditional two-chamber microbial fuel cell (MFC) mode in terms of gold removal and recovery. Additionally, gold can be recovered from printed circuit board waste using MES.
BIOELECTROCHEMISTRY
(2023)
Article
Electrochemistry
Yolina Hubenova, Mina Todorova, Rumyana Bakalska, Mario Mitov
Summary: This study examined the spectral and electrochemical properties of three newly synthesized stilbazolium dyes with an enlarged 3t-conjugated system. The dyes were synthesized through Knoevenagel condensation and their composition was confirmed by NMR spectroscopy, elemental analysis, and IR spectroscopy. The solvatochromism, optical band-gap values, HOMO, LUMO energy levels, and electrochemical oxidation/reduction mechanism of the dyes were investigated using UV-Vis and fluorescence spectroscopy, cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy.
Article
Electrochemistry
Yolina Hubenova, Eleonora Hubenova, Mario Mitov
Summary: This study investigates the use of the rootless duckweed Wolffia globosa as a biocatalyst in Plant-based Biofuel Cells (P-BFC) for electricity generation. It is found that W. globosa can produce an electric current, and its metabolic changes lead to increased carbohydrate and protein content. This suggests that W. globosa can be a potential catalyst for P-BFCs.
JOURNAL OF ELECTROCHEMICAL SCIENCE AND ENGINEERING
(2023)
