Article
Chemistry, Physical
David Raciti, Trevor Braun, Brian M. Tackett, Heng Xu, Mutya Cruz, Benjamin J. Wiley, Thomas P. Moffat
Summary: The study introduces a novel electrolyzer structure integrated with highly conductive silver nanowire catalysts and porous PTFE GDL, which improves the performance and durability of the electrolyzer, addressing issues such as low catalyst utilization efficiency and GDL flooding in traditional electrolyzers.
Article
Electrochemistry
Jungae Lim, Hyungseob Lim, Bupmo Kim, Soo Min Kim, Jong-Bae Lee, Kang Rae Cho, Hansaem Choi, Siraj Sultan, Wonyong Choi, Wooyul Kim, Youngkook Kwon
Summary: By controlling the thickness of silver nanostructure, the H2/CO syngas ratio produced by CO2 reduction can be adjusted, promoting CO production and improving syngas composition.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Jiaying Yu, Yongjie Qin, Xiaodeng Wang, Hongju Zheng, Keru Gao, Hengpan Yang, Laiyong Xie, Qi Hu, Chuanxin He
Summary: This study investigates the impact of proton transfer rate on the kinetics of NO3-RR using Cu-based catalysts. The results demonstrate that proton transfer is involved in the rate-determining step of NO3-RR, and the weak water dissociation ability of Cu leads to a slow proton transfer rate and sluggish kinetics. By incorporating uncoordinated carboxylate ligands, the water dissociation ability of Cu catalysts is enhanced, enabling rapid proton transfer and reducing the overall energy barrier of NO3-RR.
Article
Electrochemistry
Xuehua Wang, Liwen Zhang, Xiaoli Xi, Zuoren Nie
Summary: In this study, tungsten was extracted from LiCl-KCl-Li2WO4 molten salt, resulting in reduced electrolysis temperature and energy consumption, improved dissolution efficiency and current efficiency. Furthermore, the oxidation-reduction process of tungsten ion in tungstate was investigated, and spherical tungsten powder clusters were successfully prepared.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Alexander R. Heenan, Aaron T. Marshall
Summary: This study demonstrates that by optimizing the electrode geometry and electrolyte flowrate, the selectivity for C2H4 in the electrochemical CO2 reduction reaction (eCO2RR) can be enhanced. It also suggests that the reported poisoning of copper may be caused by increasing KHCO3 concentration during electrolysis.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Daixing Wei, Yiqing Wang, Chung-Li Dong, Zhengqi Zhang, Xinyu Wang, Yu-Cheng Huang, Yuchuan Shi, Xiaoli Zhao, Jialin Wang, Ran Long, Yujie Xiong, Fan Dong, Mingtao Li, Shaohua Shen
Summary: Electrochemical CO2 reduction reaction (ECO2RR) with controlled product selectivity was achieved on Ag-Cu bimetallic surface alloys. By tuning surface compositions and applied potentials, high selectivity towards C2 hydrocarbons/alcohols (approximate to 60% FE), C1 hydrocarbons/alcohols (approximate to 41% FE), and CO (approximate to 74% FE) was obtained. The d-band center dependent on surface composition could regulate the *CO binding strengths and subsequent reaction pathways, while adjusting the applied potentials altered the energy of participated electrons, leading to controlled ECO2RR selectivity towards desired products. A predominant region map and an indicator for evaluating the thermodynamic predominance of the *CO subsequent reactions were proposed as theoretical guidance for controllable ECO2RR product selectivity over bimetallic alloys.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Aditya Prajapati, Rohan Sartape, Miguel T. Galante, Jiahan Xie, Samuel L. Leung, Ivan Bessa, Marcio H. S. Andrade, Robert T. Somich, Marcio Reboucas, Gus T. Hutras, Nathalia Diniz, Meenesh R. Singh
Summary: To reduce atmospheric CO2 levels, it is important to develop and integrate electrochemical CO2 capture and reduction technologies. This study presents a systematic protocol and successfully integrates the CO2 capture and reduction processes to produce value-added products.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Jae Yong Park, Wan Jae Dong, Jong-Lam Lee
Summary: A facile method is developed to produce monolithic nanoporous Ag nanowires within a few minutes, which has a high electrochemical surface area and can serve as an efficient catalyst for CO2 reduction.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Jae Yong Park, Wan Jae Dong, Jong-Lam Lee
Summary: A facile method was developed to produce monolithic nanoporous Ag nanowires within a few minutes, with high electrochemical surface area and increased CO2 reduction activity. The Ag NWs showed high selectivity of CO and good long-term stability in CO2 reduction, making them promising electrocatalysts for reducing carbon dioxide.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Seto Sugianto Prabowo Rahardjo, Yu-Jen Shih
Summary: Electrochemical engineering processes are emerging as efficient and environmentally friendly alternatives for ammonia removal. In this study, Ag electrodes with metallic silver nanoparticles were synthesized and tested for electrochemical oxidation of ammonia. The Ag/Ni400 electrode showed the highest efficiency in NH3 oxidation and N2 yield.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Dillon T. Hofsommer, Ying Liang, Sandesh S. Uttarwar, Manu Gautam, Sahar Pishgar, Saumya Gulati, Craig A. Grapperhaus, Joshua M. Spurgeon
Summary: The conversion of waste CO2 to value-added chemicals through electrochemical reduction is a promising technology. This study investigates the electrochemistry of CO2 reduction in acidic methanol catholyte, with a focus on the selectivity control and potential dependence of the product distribution. The results show that by adjusting the pH of the catholyte, high selectivity towards methyl formate can be achieved.
Article
Chemistry, Physical
Woong Hee Lee, Chulwan Lim, Eunseo Ban, Soohyun Bae, Jongwon Ko, Hae-Seok Lee, Byoung Koun Min, Kwan-Young Lee, Jae Su Yu, Hyung-Suk Oh
Summary: This study reports a carbon-supported tungsten-seed-based 3D silver dendrite catalyst with abundant nanograin boundaries, demonstrating enhanced CO2 reduction performance and stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Analytical
Hideto Moriyama, Genki Ogata, Haruma Nashimoto, Seishiro Sawamura, Yoshiaki Furukawa, Hiroshi Hibino, Hiroyuki Kusuhara, Yasuaki Einaga
Summary: Monitoring drug concentration in blood is crucial for safe and effective drug treatment. This study introduces a rapid electrochemical method using boron-doped diamond electrodes to determine the unbound drug concentration in human serum. The results show that this method can provide fast and reliable measurement within the clinical concentration range.
Article
Nanoscience & Nanotechnology
Zengsen Sun, Xinhao Wu, Daqin Guan, Xiaoyi Chen, Jie Dai, Yuxing Gu, Sixuan She, Wei Zhou, Zongping Shao
Summary: A novel silver and silver-doped ceria (Ag/CeO2) nanocomposite catalyst synthesized by a facile one-pot coprecipitation method shows high efficiency and activity in converting CO2 into CO due to its rich 3D interface and high Ce3+ concentration. The strong interfacial interaction between Ag and CeO2 enables improved durability during electrolysis, with accelerated CO formation rate being the main factor contributing to the superior ECR performance of Ag/CeO2.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Jing Xiao, Subiao Liu, Peng-Fei Sui, Chenyu Xu, Lu Gong, Hongbo Zeng, Jing-Li Luo
Summary: This study introduces in-situ generated hydroxides by synthesizing rhombohedral CdCO3 crystals under electrochemical CO2RR conditions, effectively inhibiting the competitive hydrogen evolution reaction and improving the selectivity and activity of the CO2 reduction reaction.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Materials Science, Multidisciplinary
Chuanlong Ma, Anton Nikiforov, Dirk Hegemann, Nathalie De Geyter, Rino Morent, Kostya (Ken) Ostrikov
Summary: This review presents recent advances in low-temperature plasma processing for controlling surface wettability. The underlying mechanisms, key features of fabrication processes, and water-surface interactions are discussed. It aims to guide further development of advanced functional materials.
INTERNATIONAL MATERIALS REVIEWS
(2023)
Article
Chemistry, Physical
Xin Zeng, Shuai Zhang, Xiucui Hu, Cheng Zhang, Kostya (Ken) Ostrikov, Tao Shao
Summary: With the increase in the greenhouse effect and reduction of fossil fuel resources, finding a feasible solution to directly convert power to chemicals using renewable energy is urgent. The power-to-chemicals approach, such as non-thermal plasma, electro-catalysis, and photo-catalysis, has shown great potential in the past two decades. This paper introduces the application of plasma technology in energy conversion, focusing on plasma-enabled ammonia synthesis and analyzing its state-of-the-art, mechanisms, and techno-economics. It emphasizes the importance of the power-to-chemicals approach in reducing carbon emissions and environmental pollution.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Multidisciplinary
Amandeep Singh Pannu, Suvankar Sen, Xiaodong (Tony) Wang, Robert Jones, Kostya (Ken) Ostrikov, Prashant Sonar
Summary: Organic-inorganic hybrid lead trihalide perovskites have shown promise in various optoelectronic devices. Red-emitting perovskite-based LEDs have been less developed compared to green and blue ones. This study utilizes red-emitting 2D perovskites and carbon dots to create a stable composite material for red-emitting LEDs with improved performance.
Article
Nanoscience & Nanotechnology
Negar Zebardastan, Jonathan Bradford, Josh Lipton-Duffin, Jennifer MacLeod, Kostya (Ken) Ostrikov, Massimo Tomellini, Nunzio Motta
Summary: Face-to-face annealing is an effective method for obtaining epitaxial graphene with precise control over size, quality, growth rate and thickness.
Article
Chemistry, Multidisciplinary
Xin Zeng, Shuai Zhang, Yadi Liu, Xiucui Hu, Kostya Ken Ostrikov, Tao Shao
Summary: To meet global net-zero emission targets, sustainable and low-carbon alternatives are urgently needed for energy-intensive industrial processes like ammonia synthesis. In this study, plasma catalysis is used to achieve renewable-electricity-driven ammonia synthesis under mild conditions. By identifying energy loss pathways and optimizing process parameters, such as pulse voltage and gap distance, high ammonia yields with high energy efficiency and low emission footprint are obtained.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Rusen Zhou, Dejiang Zhou, Baowang Liu, Lanlan Nie, Yubin Xian, Tianqi Zhang, Renwu Zhou, Xinpei Lu, Kostya Ken Ostrikov, Patrick J. Cullen
Summary: The addition of helium can enhance the synthesis of ammonia by modifying the energy transfer mechanism in the plasma, leading to more efficient activation of N2 and production of NH3.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Review
Chemistry, Physical
Tianlai Xia, Yu Yang, Qiang Song, Mingchuan Luo, Mianqi Xue, Kostya (Ken) Ostrikov, Yong Zhao, Fengwang Li
Summary: Recently, electrocatalytic reactions involving oxygen, nitrogen, water, and carbon dioxide have been developed to produce clean energy, fuels, and chemicals. Understanding catalyst structures, active sites, and reaction mechanisms is crucial for improving performance. In this review, we summarize state-of-the-art in situ characterisation techniques used in electrocatalysis, categorizing them into microscopy, spectroscopy, and other techniques. We discuss the capacities and limits of these techniques to guide further advances in the field.
NANOSCALE HORIZONS
(2023)
Review
Chemistry, Multidisciplinary
Jae Muk Lim, Young Seok Jang, Hoai Van T. Nguyen, Jun Sub Kim, Yeoheung Yoon, Byung Jun Park, Dong Han Seo, Kyung-Koo Lee, Zhaojun Han, Kostya (Ken) Ostrikov, Seok Gwang Doo
Summary: To achieve a zero-carbon-emission society, increasing the use of clean and renewable energy is crucial. However, renewable energy resources have limitations in terms of geographical locations and limited time intervals for energy generation. Therefore, there is a rising demand for high-performance energy storage systems (ESSs) to effectively store and utilize energy during peak and off-peak periods. Supercapacitors, particularly electrical double layer capacitors (EDLCs), show promise as short-term ESSs due to their long cycle retention, high power densities, fast charge/discharge characteristics, and moderate operating voltage window. However, further research is needed to increase the operating voltage and energy densities of EDLCs while maintaining long-term cycle stability and power densities, which are crucial for ESS operation. This article examines advancements in EDLC research to achieve a high operating voltage window and high energy densities for next-generation supercapacitor-based ESSs.
NANOSCALE ADVANCES
(2023)
Article
Engineering, Chemical
Liangliang Lin, Yunming Tao, Sergey A. Starostin, Chengdong Li, Hongyu Huang, Ailin He, Yingjun Wu, Volker Hessel, Kostya Ken Ostrikov
Summary: A dielectric barrier discharge (DBD) plasma was used to reactivate spent Pd/Al2O3 catalysts, and the gas composition in the plasma process affected the extent of coke elimination and electrochemical performance of the reactivated catalysts. The electrochemical performance was found to improve with the increase of gas flow rate and treatment time for Ar and N2 gases, but decrease for O2 gas. Higher oxidation degrees of Pd reduced the electrochemical performance. This study presents a new strategy for reusing waste catalysts in a simple and environment-friendly manner.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Physics, Multidisciplinary
Sanjib Sarkar, Jyoti K. Atul, Modhuchandra Laishram, Dandan Zou, Kostya (Ken) Ostrikov
Summary: The Farley-Buneman and Gradient Drift instabilities in a partially ionized dusty electrojet region were investigated using a fluid model. The effects of dissociative electron-ion recombination and dust charge fluctuation on the instabilities were considered. The dispersion relation describing the propagation of electrojet instabilities within the dust ion acoustic range in a magnetized partially ionized dusty plasma was solved numerically and analytically. The results showed that the Gradient Drift instability was unstable at a much longer wavelength compared to the Farley-Buneman instability. The threshold electron drift velocity for Farley-Buneman instability was affected by the charge on dust, with a decrease at lower altitudes and an increase at higher altitudes. Furthermore, the dissociative electron-ion recombination had a stronger damping effect than the dust charge fluctuation on both instabilities.
Article
Chemistry, Multidisciplinary
Haotian Gao, Guoli Wang, Zhongzheng Huang, Lanlan Nie, Dawei Liu, Xinpei Lu, Guangyuan He, Kostya Ken Ostrikov
Summary: Nitrogen fixation is a crucial process for various biological and industrial processes, but it is also a major source of carbon emissions globally. In this study, a novel approach using plasma-activated mist (PAM) is proposed for efficient and sustainable nitrogen fixation. The PAM system generates nitrogen-fixation species through the reaction of air plasma and water mist, and the liquid-phase nitrogen fixation product is dominated by NO3-. This system is applied to deliver nitrogen-based nutrients directly to plant roots using an aeroponic system, leading to significant improvements in plant growth.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Pei-Chun Wong, Darwin Kurniawan, Jia-Lin Wu, Wei-Ru Wang, Kuan-Hao Chen, Chieh-Ying Chen, Ying-Chun Chen, Loganathan Veeramuthu, Chi-Ching Kuo, Kostya Ken Ostrikov, Wei-Hung Chiang
Summary: In this study, a multifunctional metal-based scaffold was developed for bone defect repair by combining nitrogen-doped graphene quantum dot hydrogel and magnesium alloy. Through in vivo study, it was found that this hybrid scaffold promoted faster, more uniform, and directional bone growth, showing great potential for application in bone defect repair.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Energy & Fuels
Xu Han, Kostya Ken Ostrikov, Jeff Chen, Yao Zheng, Xiaoyong Xu
Summary: The persistent utilization of fossil fuels has led to an increase in atmospheric carbon dioxide levels. The electrochemical reduction of carbon dioxide to solid carbon is considered a potential solution to environmental concerns due to its simplicity, precise control, and environmental friendliness. However, the strong carbon-oxygen bond and electrode degradation hinder the commercialization of this technology. Different strategies have been reported, including solid oxide electrolysis, molten salt and liquid metal reduction, and hybrid electro-thermochemical looping. This mini-review provides a systematic analysis of experimental conditions, mechanisms, and product morphologies, serving as a reference for future research in this emerging field.
Article
Nanoscience & Nanotechnology
Qilei Xu, Qianqian Wu, Chenglin Wang, Xiumei Zhang, Zhengyang Cai, Liangliang Lin, Xiaofeng Gu, Kostya (Ken) Ostrikov, Haiyan Nan, Shaoqing Xiao
Summary: This study employed a two-step KI-assisted confined-space chemical vapor deposition method to prepare multilayer WSe2/SnS2 p-n heterojunctions. The optical characterization and electrical tests revealed clear interfaces and vertical heterostructures, as well as good rectification characteristics and high photoresponse. These performances are likely attributed to the ultra-low dark current generated in the depletion region and the high direct tunneling current during illumination.
Review
Chemistry, Multidisciplinary
Jinyong Lin, Dong Li, Changhong Li, Ziqi Zhuang, Chengchao Chu, Kostya (Ken) Ostrikov, Erik W. W. Thompson, Gang Liu, Peiyu Wang
Summary: Cancer cells are more susceptible to oxidative stress and nanomaterials-based therapies that generate reactive oxygen species (ROS) have been effective in eliminating cancer cells. These therapies, including chemodynamic therapy, photodynamic therapy, sonodynamic therapy, as well as multi-modal therapies such as combination therapy, have shown significant inhibition of tumor growth. However, the limitations of multi-modal therapy in material preparation and operation protocols hinder its clinical application. Cold atmospheric plasma (CAP), as a reliable source of ROS, light, and electromagnetic fields, provides a simple alternative for implementing multi-modal treatments. Therefore, the emerging field of tumor precision medicine is expected to benefit from these promising multi-modal therapies based on ROS-generating nanomaterials and reactive media like CAPs.
