Article
Chemistry, Physical
Zhenghao Qiao, Wenmin Wang, Na Liu, Hsin-Ting Huang, Lakshmanan Karuppasamy, Hsin-Ju Yang, Cheng-Hua Liu, Jerry J. Wu
Summary: With the shortage of global fossil energy and the increasing crisis of environmental deterioration, hydrogen energy has become an environmentally benign alternative as a clean energy source. In this study, the MOF/MOS2 composite photocatalyst demonstrated excellent photocatalytic stability and the highest hydrogen production capacity under the optimal synthesis conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Sang Eon Jun, Seokhoon Choi, Shinyoung Choi, Tae Hyung Lee, Changyeon Kim, Jin Wook Yang, Woon-Oh Choe, In-Hyuk Im, Cheol-Joo Kim, Ho Won Jang
Summary: Research has shown that by applying a graphene interlayer between p-Si and MoP nanorods, efficient hydrogen evolution reaction can be achieved in silicon-based photoelectrochemical catalysts. Graphene facilitates rapid transfer of photogenerated electrons and promotes the formation of Mo-O-C covalent bonds, thereby enhancing the catalyst performance.
NANO-MICRO LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Amit Kumar Rana, Myeong Hoon Jeong, Young Im Noh, Hyesung Park, Jeong Min Baik, Kyoung Jin Choi
Summary: This study demonstrates the development of a bifunctional electrocatalyst by hybridizing TMDs with perovskite oxides, resulting in enhanced electrocatalytic activity for water splitting. By tuning the intrinsic properties of TMDs, a nanostructured morphology with increased surface-active edge sites was achieved, leading to low onset potential and Tafel slope for both hydrogen and oxygen evolution reactions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Bin Liu, Shujie Wang, Gong Zhang, Zichen Gong, Bo Wu, Tuo Wang, Jinlong Gong
Summary: Photoelectrochemical water splitting is a crucial method for producing hydrogen using solar energy. The development of tandem cells for unbiased water splitting has gained significant interest. This review provides an overview of the current status, challenges, and prospects in this field.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Physical
Jagadis Gautam, Debabrata Chanda, Mikiyas Mekete Meshesha, Seok Gwon Jang, Bee Lyong Yang
Summary: Heterointerface engineering is a promising strategy for creating efficient catalysts by enhancing catalytic active centers and charge transfer capabilities. In this study, a novel heterostructure of manganese cobalt sulfide-molybdenum disulfide on nickel foam (MnCo2S4-MoS2/NF) was synthesized and showed accelerated charge transfer ability and multiple integrated active sites. The MnCo2S4-MoS2/NF display low overpotentials for HER and OER, surpassing commercial and previously reported catalysts, making them a potential candidate for overall water splitting.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
I. R. Hamdani, A. N. Bhaskarwar
Summary: This review focuses on the fundamentals, recent progress, challenges, and possible strategies of solar hydrogen production through photoelectrochemical watersplitting technology, aiming to make it a practically feasible option to address the energy crisis and rising demands.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Nanoscience & Nanotechnology
Malgorzata Aleksandrzak, Martyna Baca, Michal Pacia, Karolina Wenelska, Beata Zielinska, Ryszard J. Kalenczuk, Ewa Mijowska
Summary: The study presents the photocatalytic activity of molybdenum disulfide structures with different dimensions functionalized with polymeric carbon nitride in the photocatalytic water splitting reaction. Quantum dots functionalized with PCN exhibited the highest photocatalytic efficiency compared to other MoS2 structures due to effective separation of electron-hole pairs, enhanced up-converted photoluminescence, and the highest reactivity of electrons in the conduction band.
Article
Chemistry, Physical
Kaiwen Wang, Zhipeng Liu, Qian Gao, Nan Li, Kaifeng Yu
Summary: In this study, a hierarchical self-supported electrode composed of nanowire arrays of 1T-MoS2 nanosheets decorated with Ni(OH)(2) nanoparticles (Ni(OH)(2)@1T-MoS2 NWAs) was reported for alkaline water electrolysis. The activity towards hydrogen evolution reaction (HER) was significantly improved by promoting water dissociation and hydrogen adsorption capability on the 1T-MoS2 basal plane with Ni(OH)(2). The electrode also exhibited catalytic activity for the oxygen evolution reaction (OER).
APPLIED SURFACE SCIENCE
(2022)
Review
Materials Science, Multidisciplinary
Mohit Kumar, Bhagatram Meena, Palyam Subramanyam, Duvvuri Suryakala, Challapalli Subrahmanyam
Summary: Photoelectrochemical water splitting is a method to generate hydrogen from water using solar radiation, but its efficiency is limited. The synergistic effect of using different strategies with cocatalyst decoration shows promise for enhancing efficiency and stability.
NPG ASIA MATERIALS
(2022)
Article
Chemistry, Physical
Gihun Jung, Choongman Moon, Filipe Martinho, Yonghoon Jung, Jinwoo Chu, Hyewon Park, Alireza Hajijafarassar, Rasmus Nielsen, Jorgen Schou, Jeongyoung Park, Peter Christian Kjaergaard Vesborg, Ole Hansen, Yunseog Lee, Stela Canulescu, Byungha Shin
Summary: A photoelectrochemical water splitting device based on a dual-junction monolithic tandem cell with high performance was developed. The device achieved the highest photocurrent density and solar-to-hydrogen conversion efficiency among dual-junction monolithic photoelectrochemical cells, except for III-V materials. The use of TOPCon Si, TTO and SnO2 in the device contributed to its stability and high efficiency.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
R. Shilpa, K. S. Sibi, R. K. Pai, S. R. Sarath Kumar, R. B. Rakhi
Summary: This work reports a facile synthesis of molybdenum disulfide nanosheets for electrocatalytic hydrogen evolution. The growth of nano-materials over the nickel foam substrate resulted in improved HER performance.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Chemistry, Physical
Dan Zhang, Han-Hee Cho, Jun-Ho Yum, Mounir Mensi, Kevin Sivula
Summary: This study demonstrates a robust organic photocathode operating in near-neutral pH electrolyte, achieving high photocurrent density and operational stability. By combining the optimized photocathode with a benchmark photoanode, a large-area organic photoelectrochemical tandem cell for complete solar water splitting is demonstrated, with high predicted solar-to-hydrogen conversion efficiency.
ADVANCED ENERGY MATERIALS
(2022)
Review
Energy & Fuels
Jun Liu, Huaping Zhao, Zhijie Wang, Thomas Hannappel, Ulrike I. Kramm, Bastian J. M. Etzold, Yong Lei
Summary: This review summarizes the current advances in tandem nanostructures for photoelectrochemical (PEC) water splitting. Firstly, the state of the art for tandem nanostructures applied in PEC water splitting is summarized. Secondly, the advances in this field and advantages arising from employing tandem nanostructures for PEC water splitting are outlined. Subsequently, different types of tandem nanostructures are reviewed.
Review
Chemistry, Multidisciplinary
Roozbeh Siavash Moakhar, Seyed Morteza Hosseini-Hosseinabad, Saeid Masudy-Panah, Ashkan Seza, Mahsa Jalali, Hesam Fallah-Arani, Fatemeh Dabir, Somayeh Gholipour, Yaser Abdi, Mohiedin Bagheri-Hariri, Nastaran Riahi-Noori, Yee-Fun Lim, Anders Hagfeldt, Michael Saliba
Summary: This article comprehensively reviews the recent advancements in CuO-based photoelectrodes for PEC water-splitting applications, highlighting their high activity and promising physicochemical properties. Various synthesis methods, characterization techniques, and fundamental factors of CuO-based photoelectrodes are discussed in detail. Additionally, the PEC properties of CuO/2D materials are also evaluated, demonstrating their potential as nanocomposites for photocurrent-generating devices.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Li Gong, Xiao Mu, Qiang Li, Lei Ma, Yucong Xiong, Rong Li
Summary: An efficient electrocatalyst NC@Mo2C@MoS2-(Ni) was designed for the Hydrogen Evolution Reaction in water electrolysis, showing good catalytic performance in both acidic and basic media. This work not only fabricates a catalyst for hydrogen evolution, but also provides a method to design more efficient functional electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Chemistry, Multidisciplinary
Young-Moo Jo, Yong Kun Jo, Jong-Heun Lee, Ho Won Jang, In-Sung Hwang, Do Joon Yoo
Summary: In order to improve the performance of gas sensors and enhance the quality of life, the use of metal-organic frameworks (MOFs) as sensing materials has been explored. MOFs are known for their high surface area, porosity, and unique surface chemistry, making them promising for gas-sensor innovations. Various types of MOFs have been developed by studying their compositional and morphological dependences, and incorporating catalysts and light activation. Additionally, MOFs have multiple applications as molecular sieves, absorptive filtering layers, and heterogeneous catalysts due to their separation properties and catalytic activity.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Won Seok Cho, Dae Myung Hong, Wan Jae Dong, Tae Hyung Lee, Chul Jong Yoo, Donghwa Lee, Ho Won Jang, Jong-Lam Lee
Summary: In this study, bismuth-based catalysts were introduced for the efficient electrochemical reduction of CO2 to formic acid. The catalysts consisted of petal-shaped Bi2O2CO3 (BOC), which spontaneously formed from Bi thin film in aqueous carbonate solution at room temperature. The BOC petals transformed to reduced BOC (R-BOC) during the electrochemical reduction process, and the lattice mismatch between the domains induced strain at the interfaces. The R-BOC petals exhibited a superior Faradaic efficiency of 95.9% for the electrochemical conversion of CO2 to formic acid.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
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
Goeen Jeong, Hyung-Seop Han, Hojeong Jeon, Yu-Chan Kim, Ho Won Jang, Myoung-Ryul Ok
Summary: Although metallic microneedles (MNs) and iontophoresis have been extensively studied, the use of biodegradable metals for transdermal drug delivery has not received much attention. In this study, Mg was employed as a promising candidate for an MN electrode due to its metallic properties and the hydrogen gas generated during Mg corrosion. The Mg MN electrode was fabricated using a nanosecond laser, and the hydrogen gas produced during iontophoresis was measured at various applied potentials. The results demonstrate an optimal potential range for iontophoresis based on the combined effect of enhanced drug diffusion and impediment from hydrogen generation.
METALS AND MATERIALS INTERNATIONAL
(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
Engineering, Environmental
Jeong Hyun Oh, Gyeong Ho Han, Junhyeong Kim, Ji Eun Lee, Hyeonjin Kim, Su Kyung Kang, Hyunki Kim, Sanghyuk Wooh, Pyung Soo Lee, Ho Won Jang, Soo Young Kim, Sang Hyun Ahn
Summary: The rational design of electrodes is crucial for efficient hydrogen production through water electrolysis. This study demonstrates the significant role of physical properties of electrodes in enhancing the mass transfer performance of the electrolyzer, especially at high current densities. Self-supported NiMo and NiFe electrodes with high wettability, porosity, and gas permeability are fabricated using electrodeposition. The combination of these electrodes with a membrane electrode assembly in anion exchange membrane water electrolyzer (AEMWE) results in significantly decreased overpotentials, particularly in the high current density region. The AEMWE achieves a current density of 7.5 A/cm2 with a lower heating value efficiency of 50% and shows excellent stability at a current density of 1.00 A/cm2 for 100 hours. These findings highlight the crucial role of rational electrode design in achieving high-performance AEMWE.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Energy & Fuels
Yu Li, Yingji Wu, Kouqi Liu, Seyed Ali Delbari, Aejung Kim, Abbas Sabahi Namini, Quyet Van Le, Mohammadreza Shokouhimehr, Changlei Xia, Ho Won Jang, Rajender S. Varma, Rafael Luque
Summary: The demand for sustainable and ecofriendly materials has increased in recent decades. Metal-organic frameworks (MOFs) have attracted significant interest due to their unique chemical and physical properties. They have been utilized in various chemistries to convert biomass into biofuels and other valuable compounds. This review article discusses the conversion of glucose into 5-hydroxymethylfurfural (HMF) or levulinic acid, HMF into 2,5-furandicarboxylic acids, vanillin into 2-methoxy-4-methylphenol, and other transformations using MOF-based catalysts with improved green credentials. The article also examines the reusability aspect, reactivity of the catalysts with MOFs, benefits, and potential drawbacks, as well as future perspectives.
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
Nanoscience & Nanotechnology
Yong-Hee Lee, Byeongjun Gil, Duyoung Yang, Mi-Hyang Sheen, Euijoon Yoon, Yongjo Park, Ho-Won Jang, Sangmoon Yoon, Miyoung Kim, Young-Woon Kim
Summary: This study explores the relationship between atomic arrangement and luminescence properties in a high-quality α-Ga2O3 thin film on an Al2O3 single-crystal membrane. The strain induced by merging domain boundaries shows significant variability in annular darkfield images, despite no confirmed additional gallium concentration. The bandgap energy of α-Ga2O3 is estimated to be 5.56 eV from CL measurement in a transmission electron microscope. A peak at 320 nm is observed within the domain, while the domain boundary exhibits spectrum peaks at 380-480 nm. The formation of anti-phase domains (APD) is caused by the instabilities of Al-O bonding templates provided by the Al2O3 substrate. The APD boundary results in a characteristic wavelength of 350 nm, which arises from the merging boundary of in-phase and anti-phase domains.
Article
Materials Science, Multidisciplinary
Jaehyun Kim, Ho Won Jang
Summary: Water electrolysis has the potential to produce renewable hydrogen fuel at a large scale, replacing fossil fuels and reducing greenhouse gas emissions. Machine learning can accelerate the discovery and design of superior electrocatalysts.
KOREAN JOURNAL OF MATERIALS RESEARCH
(2023)
Review
Energy & Fuels
Jinghan Wang, Dokyoon Kim, Jong Hyeok Park, Sangwoo Ryu, Mohammadreza Shokouhimehr, Ho Won Jang
Summary: This article reviews recent advancements in the electrochemical and photoelectrochemical production of H2O2, discussing the fundamental mechanism, electrode design, and engineering strategies. It also addresses the obstacles and challenges of this process, as well as methods to enhance H2O2 production and efficiency.
Review
Chemistry, Applied
Sang Eon Jun, Sungkyun Choi, Jaehyun Kim, Ki Chang Kwon, Sun Hwa Park, Ho Won Jang
Summary: This review article summarizes the characteristics of non-noble metal single atom catalysts (NNMSACs), including tuning reaction selectivity, metal-support interaction, and catalytic active center. It also introduces representative NNMSACs (Co, Ni, Fe, Cu, and dual metal SACs) for various electrocatalytic reactions. The remaining challenges for further advances of NNMSACs in geometric, electronic, and electrochemical properties are discussed.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Sungkyun Choi, Sol A. Lee, Jin Wook Yang, Woonbae Sohn, Jaehyun Kim, Woo Seok Cheon, Jaemin Park, Jin Hyuk Cho, Chung Won Lee, Sang Eon Jun, Sung Hyuk Park, Jooho Moon, Soo Young Kim, Ho Won Jang
Summary: Designing an appropriate catalyst for photoelectrochemical water splitting is crucial for efficient solar to hydrogen energy production. Introducing small amounts of noble metals, such as Au, into transition metal-based materials can enhance the efficiency of solar water oxidation.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Analytical
Tae Hoon Eom, Sang Eun Lee, Yeong Jae Kim, Sungkyun Choi, Gi Baek Nam, Jung-El Ryu, Tae Hyung Lee, Jin Wook Yang, Sung Hwan Cho, Seung Ju Kim, Sang Eon Jun, Seonyong Lee, Seungsoo Kim, Hee Jung Park, Ho Won Jang
Summary: Chemoresistive humidity sensors based on ultrathin V2O5•nH2O nanobelts show promising performance in real-time breath monitoring, with rapid response and recovery, as well as excellent selectivity to humidity.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
