Article
Engineering, Chemical
Xingxin Liu, Chol Nam Song, Yuxin Zhang, Li Sha, Yiming Li, Shuting Zhang
Summary: This study systematically investigated the impact of coexisting ions in coking wastewater on chloride removal efficiency, as well as the optimization of process parameters for minimizing energy consumption while maximizing removal efficiency. Results demonstrated that various ions in coking wastewater could inhibit chloride removal through different mechanisms, and the calculated optimal process parameters were crucial for achieving maximum removal efficiency and minimum energy consumption.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Youn-Hye Kim, Minsu Kim, Yohei Kotsugi, Taehoon Cheon, Debananda Mohapatra, Yujin Jang, Jong-Seong Bae, Tae Eun Hong, Rahul Ramesh, Ki-Seok An, Soo-Hyun Kim
Summary: ALD-RuO2 film with optimal process conditions shows excellent growth behavior and diffusion barrier performance, effectively preventing interdiffusion of Ru and Si.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Teayoung Lee, Woonghee Lee, Seongsoo Kim, Changha Lee, Kangwoo Cho, Choonsoo Kim, Jeyong Yoon
Summary: Recently, a method of improving the electrochemical performance of chlorine evolution on r-TiO2 nanotubes by coating a thin RuO2 layer (RuO2@r-TiO2) has been proposed. RuO2@r-TiO2 exhibited higher current efficiency, lower energy consumption, and greater stability compared to r-TiO2.
Article
Materials Science, Coatings & Films
Mina Shahmohammadi, Yani Sun, Judy Chia -Chun Yuan, Mathew T. Mathew, Cortino Sukotjo, Christos G. Takoudis
Summary: Functionalizing Ti-6Al-4V alloy with TiO2 and ZrO2 thin films using Atomic Layer Deposition showed that the mixed TZO film had the best corrosion protection, enhancing the durability and lifetime of dental implants in aggressive oral environments.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Pei Cui, Panpan Zhang, Xueli Chen, Xiuli Chen, Tao Wan, Yu Zhou, Mingru Su, Yunjian Liu, Haolan Xu, Dewei Chu
Summary: TiNb2O7 has shown great potential as an anode material for lithium-ion batteries due to its high specific capacity and safety. However, its poor ion and electron conductivity have limited its further development. In this study, we successfully improved the ion and electron transport of TiNb2O7 by doping with chlorine and creating oxygen vacancies. These modifications regulated the energy band and crystal structure, leading to enhanced lithium-ion transport behavior and superior rate performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Renjing Huang, Ohhun Kwon, Chao Lin, Raymond J. Gorte
Summary: The study compared the HDO of m-cresol using Pt/Nb2O5/MgAl2O4 and Pt/TiO2/MgAl2O4 catalysts, finding that Pt/Nb2O5/MgAl2O4 catalyst showed better coke tolerance and higher selectivity towards toluene production than Pt/MgAl2O4.
JOURNAL OF CATALYSIS
(2021)
Article
Metallurgy & Metallurgical Engineering
Mirco Peron, Susanna Cogo, Maria Bjelland, Abdulla Bin Afif, Anup Dadlani, Elisa Greggio, Filippo Berto, Jan Torgersen
Summary: The study investigates the corrosion behavior and biological response of ALD TiO2, HfO2, and ZrO2 coatings on AZ31 alloy. Results indicate improved corrosion resistance and cytotoxicity of all three coatings, with HfO2 showing the highest performance in terms of corrosion resistance and cell viability.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Energy & Fuels
Linna Lu, Yuheng Zeng, Mingdun Liao, Jingming Zheng, Yiran Lin, Mengmeng Feng, Yuyan Zhi, Haiyan He, Waner Ding, Chunhui Shou, Ganghua Qin, Baojie Yan, Jichun Ye
Summary: The comparison study showed that AlOx and AlOx/SiOx combination do not provide better passivation quality compared to SiOx. It was also found that AlOx and AlOx/SiOx significantly enhance B diffusion while suppressing P diffusion. Additionally, the enhanced B diffusion causes extra Auger recombination and degrades p-TOPCon passivation quality.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Energy & Fuels
Ying Liu, Borong Sang, Md. Anower Hossain, Kun Gao, Hao Cheng, Xiaomin Song, Sihua Zhong, Linxing Shi, Wenzhong Shen, Bram Hoex, Zengguang Huang
Summary: This study investigated the application of aluminum-doped TiO2 thin films (ATO) in high-efficiency silicon solar cells. The ATO thin films were successfully prepared and their properties, including elemental analysis, thermal stability, and optical properties, were systematically studied. High effective minority carrier lifetime and low contact resistivity were achieved on silicon wafers, highlighting ATO as a promising alternative for high-efficiency crystalline silicon solar cells.
Article
Physics, Applied
Nisika, Anupam Ghosh, Kulwinder Kaur, Raja Sekhar Bobba, Quinn Qiao, Mukesh Kumar
Summary: A facile approach to passivate both defect-prone areas of CZTS absorber with a TiO2 buffer layer has been reported to improve electronic properties and carrier transport efficiency. Modulation of electrical properties of CZTS grain boundaries by the presence of oxygen during TiO2 deposition enhances photovoltage generation, leading to decreased carrier recombination and dark current. The findings provide insights into engineering CZTS grain boundaries for controlling electronic properties of CZTS and CZTS/TiO2 heterojunctions.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Nabilah Alias, Akrajas Ali Umar, Nurul Ain Abd Malek, Kai Liu, Xiaoguo Li, Nur Adliha Abdullah, Mohd Mustaqim Rosli, Mohd Yusri Abd Rahman, Zejiao Shi, Xin Zhang, Haijuan Zhang, Fengcai Liu, Jiao Wang, Yiqiang Zhan
Summary: The deficiency in the photoelectrical dynamics at the interface caused by surface traps in the TiO2 electron transport layer (ETL) is the critical factor for the low efficiency in perovskite solar cells. However, by growing a 2D TiS2 layer on the ETL, the defects can be effectively passivated, resulting in improved performance of the cells.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Chao Yang, Liyuan Sheng, Chaochao Zhao, Di Wu, Yufeng Zheng
Summary: The corrosion of magnesium alloys poses a limitation to their practical applications. By incorporating corrosion-resistant nanoparticles in microarc oxidation (MAO) coating, the corrosion resistance performance can be enhanced. However, excessive addition of these nanoparticles may lead to other issues. In this study, the structure of the MAO passivation layer was regulated using F- salts to generate a low dielectric constant MgF2 phase, reducing the high discharge voltage.
Article
Chemistry, Applied
Wentao Cheng, Yilin Liu, Li Wu, Rongsheng Chen, Jiaxin Wang, Shuai Chang, Feng Ma, Yang Li, Hongwei Ni
Summary: In this study, a composite catalyst consisting of RuO2/IrO2 decorated TiO2 nanotube arrays was proposed for industrial chlorine evolution reactions. The composite catalyst showed superior catalytic activity, selectivity, and stability.
Article
Energy & Fuels
A. Wratten, S. L. Pain, A. Yadav, E. Khorani, T. Niewelt, L. Black, G. Bartholazzi, D. Walker, N. E. Grant, J. D. Murphy
Summary: This study investigates the potential of ultra-thin HfO2 films grown by atomic layer deposition for passivating contacts to silicon. It specifically focuses on variations in film thickness and post-deposition annealing temperature. The results show that 2.2 nm thick films annealed at 475 degrees C exhibit the highest passivation quality. The effective work function of the films also decreases with decreasing thickness. A post-deposition annealing process reduces the effective work function further. The study also examines the contact resistivity in a passivating contact structure utilizing HfO2 and finds a temperature dependence on the annealing process. The lowest resistance is achieved below 375 degrees C.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Applied
Wentao Cheng, Yilin Liu, Li Wu, Rongsheng Chen, Jiaxin Wang, Shuai Chang, Feng Ma, Yang Li, Hongwei Ni
Summary: In this study, a novel composite catalyst RuO2/IrO2-TiO2 NTAs is proposed for industrial chlorine evolution reactions. The catalytic activity of this composite catalyst is superior to most materials used for CER, showing excellent stability and selectivity towards the oxygen evolution reaction.
Article
Chemistry, Multidisciplinary
Jeong Eun Song, Sun Kyung Hwang, Jae Hyun Park, Jin Young Kim
Summary: In this study, the introduction of an In2S3 passivation layer in Cu2ZnSn(S,Se)4 thin-film solar cells helped improve the device performance by reducing interfacial recombination and improving morphology. The results showed significant increases in open-circuit voltage and conversion efficiency.
Article
Materials Science, Multidisciplinary
Sun Kyung Hwang, Ik Jae Park, Se Won Seo, Jae Hyun Park, So Jeong Park, Jin Young Kim
Summary: We demonstrate an efficient monolithic two-terminal perovskite/CZTSSe tandem solar cell by reducing the surface roughness of the electrochemically deposited CZTSSe bottom cell. The perovskite top cell with a bandgap of 1.65 eV is prepared on the flattened CZTSSe bottom cell, resulting in efficient perovskite/CZTSSe tandem solar cells. The best performing tandem device exhibits a high conversion efficiency of 17.5% without the hysteresis effect.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Hyun Woo Lim, Jae Hyun Park, Bingyi Yan, Jin Young Kim, Chan Woo Lee
Summary: In this study, a new type of titanium foam electrode with core/shell-structured mixed metal oxide nanoparticles was demonstrated to achieve almost zero polarization for the chlorine evolution reaction in chlor-alkali electrolysis. The electrode showed significantly lower noble metal usage compared to commercial electrodes and exhibited fast charge-transfer kinetics and high mass transport rates, leading to excellent performance in chlorine and hydrogen gas evolution reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Multidisciplinary
Jae Hyun Park, Su Geun Ji, Young Seon Yoon, Min-Ah Park, Sun Hwa Lee, Ki Hong Kim, Jin Young Kim
Summary: As an alternative to crystalline Si (c-Si) cells, perovskite (PVSK)/Si tandem solar cells (TSCs) are gaining attention for their higher efficiency. The tandem device combines the maturity of c-Si cells and the high performance of PVSK solar cells, leading to increasing expectations for commercialization. This perspective article summarizes the recent progress of PVSK/Si TSCs and reviews opto-electronic characterization methods, providing insights for further development.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Energy & Fuels
Min Kyung Lee, Sungkyun Choi, Hoonkee Park, Tae Hyung Lee, Sol A. Lee, Jin Wook Yang, Su Geun Ji, Woo Seok Cheon, Sang Hyun Ahn, Soo Young Kim, Mohammadreza Shokouhimehr, Jin Young Kim, Ho Won Jang
Summary: A novel nickel-based 2D MOF was synthesized and demonstrated excellent electrocatalytic performance for the oxygen evolution reaction. The resulting Ni-NDC@NF exhibited low overpotential, small Tafel slope, high faradaic efficiency, and long-term stability. Furthermore, the electrodeposition of NiMo alloy on Ni-NDC@NF enhanced the hydrogen evolution reaction activity, enabling efficient overall water splitting.
Article
Chemistry, Physical
Yeo Jin Choi, Sung Yeon Lim, Jae Hyun Park, Su Geun Ji, Jin Young Kim
Summary: This paper presents a study on the use of a highly volatile solvent mixture to prevent chemical degradation of PVSK middle cell and to improve the performance of the PVSK top cell. The addition of urea enhances the crystallinity and light-absorbing capability of the PVSK top cell, resulting in an increase in conversion efficiency from 6.4% to 13.9%. With the aid of the new solvent and urea additive, the PVSK/PVSK/Si 3J tandems achieve a record-high efficiency of 22.23%.
ACS ENERGY LETTERS
(2023)
Review
Nanoscience & Nanotechnology
Ik Jae Park, Hyo Kyung An, Yuna Chang, Jin Young Kim
Summary: With metal halide perovskite-based solar cells achieving a photovoltaic performance of approximately 26% and approaching the theoretical Shockley-Queisser limit, researchers are now focusing on tandem solar cells that use perovskite materials to achieve high efficiency. However, interfacial issues and difficulties in fabricating solution-processed perovskite top cells pose challenges for achieving high efficiency and stability. This paper provides a summary and review of the fundamentals and strategies to overcome these issues in tandem solar cells.
Review
Chemistry, Physical
Annisa Luthfiah, Chan Woo Lee
Summary: Research on electrocatalytic CO2 reduction reaction using solid-state electrolytes (SSEs) has gained momentum as an alternative to liquid electrolytes due to their lower cost and improved product purity. This review summarizes recent studies and opportunities related to catholyte-free CO2RR using SSEs, including the classification of studies based on product and discussion of different SSEs. The review provides insights on minimizing the use of salt electrolytes for CO2RR and the potential for improving the efficiency of CO2RR on a large scale.
Review
Chemistry, Inorganic & Nuclear
Jin Wook Yang, You Jin Ahn, Deok Ki Cho, Jin Young Kim, Ho Won Jang
Summary: Photovoltaic-electrochemical (PV-EC) fuel production is a promising technology that combines solar energy conversion and electrochemical catalysis. Halide perovskite solar cells with adjustable band gaps are attractive for PV-EC devices as they can boost electrochemical reactions without external power supply. This review focuses on halide perovskite PV-EC fuel generation, including device principles, band gap engineering, and material candidates for electrocatalysts. Recent advances in electrocatalysts, halide perovskite solar cells, and PV-EC devices for improving solar-to-fuel conversion efficiency are summarized.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Mi Gyoung Lee, Jin Wook Yang, Ik Jae Park, Tae Hyung Lee, Hoonkee Park, Woo Seok Cheon, Sol A. Lee, Hyungsoo Lee, Su Geun Ji, Jun Min Suh, Jooho Moon, Jin Young Kim, Ho Won Jang
Summary: The introduction of indium oxide nanorods as an electron transport layer enhances the photoelectrochemical performance of bismuth vanadate. A tannin-nickel-iron complex is used as an oxygen evolution catalyst to accelerate the reaction kinetics. The fabricated TANF/BiVO4/In2O3 NR photoanode exhibits improved photoactivity with high photocurrent densities.
Article
Chemistry, Multidisciplinary
Jae Hyun Park, Su Geun Ji, Ik Jae Park, Sun Kyung Hwang, Hyun Woo Lim, Jin Young Kim
Summary: This article presents a characterization platform for the sub-cell analysis of monolithic two-terminal PVSK/Si TSCs and reports a comprehensive set of electrical characterization methods.
CELL REPORTS PHYSICAL SCIENCE
(2022)