Article
Chemistry, Multidisciplinary
Xiangqian Fan, Zhiliang Wang, Tongen Lin, Du Du, Mu Xiao, Peng Chen, Sabiha Akter Monny, Hengming Huang, Miaoqiang Lyu, Mingyuan Lu, Lianzhou Wang
Summary: Constructing an intimate film/substrate interface is crucial for achieving efficient photoelectrochemical performance. Inspired by coordination chemistry, a polymeric carbon nitride film is grown on a Ti-coated substrate, leading to reduced interfacial resistance and ultralow onset potential. The PCN photoanode exhibits good photocurrent density and stability for water splitting without external bias.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Wissal Belayachi, Gerald Ferblantier, Thomas Fix, Guy Schmerber, Jean-Luc Rehspringer, Thomas Heiser, Abdelilah Slaoui, Mohammed Abd-Lefdil, Aziz Dinia
Summary: Transparent conducting oxides (TCOs) are essential for solar cells, and tin dioxide (SnO2) films, with their rich sources, low cost, and non-toxicity, are potential substitutes for the commonly used indium-doped tin oxide (ITO). SnO2 films deposited using radio frequency (RF)-magnetron sputtering exhibit high visible-light transmittance and excellent electrical properties, making them suitable for organic solar cells (OSCs) electrodes. Despite slightly lower power conversion efficiency compared to ITO, SnO2 TCO shows promise as a viable alternative.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Fang Ming, Qin Qi, Cai Qian, Liu Wei
Summary: In this study, a transparent and highly-efficient Co3FeOx nano-film was fabricated through hydrothermal method to promote the kinetics of BiVO4 photoanode water oxidation. The Co3FeOx/BVO photoanode exhibited impressive photocurrent density and onset potential, as well as better stability after 10 hours of reaction, providing a promising prospect for effective water splitting using water oxidation co-catalysts.
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Mahdi Karimi-Nazarabad, Elaheh K. Goharshadi
Summary: By loading GO on the surface of the photoanode, significant improvements in photoelectrocatalytic performance were achieved compared to Bi doping in the structure of the photocatalyst.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Saikat Das, Tadakatsu Ohkubo, Shinya Kasai, Yusuke Kozuka
Summary: Research reveals that in the growth of Bi2WO6 thin films, diffusion of oxygen vacancies from the substrate can deterministically influence phase stability, affecting the surface morphology and crystal quality of the film.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Physical
Lina Wang, Zejun Liu, Xiaohong Xu, Yuefa Jia, Qiong Mei, Fei Ding, Jianhong Peng, Qizhao Wang
Summary: This research presents a simple method to enhance the performance of BiVO4 photoanodes by introducing Ni-NDAD to promote charge separation and accelerate water oxidation kinetics. The modified Ni-NDAD/BiVO4 photoanodes demonstrate higher photocurrent density and incident photon-to-current conversion efficiency compared to pristine BiVO4. Furthermore, the Ni-NDAD/BiVO4 photoanode exhibits high PEC catalytic activity for organic contaminant removal.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Tomohiro Higashi, Hiroshi Nishiyama, Vikas Nandal, Yuriy Pihosh, Yudai Kawase, Ryota Shoji, Mamiko Nakabayashi, Yutaka Sasaki, Naoya Shibata, Hiroyuki Matsuzaki, Kazuhiko Seki, Kazuhiro Takanabe, Kazunari Domen
Summary: Unbiased solar water splitting via a photoelectrochemical-photovoltaic (PEC-PV) tandem device is a promising strategy for hydrogen production. However, the stability and efficiency of the photoanode are crucial for the performance. In this study, a defect-free Ta3N5 planar thin film with a uniform electrocatalyst layer was fabricated, significantly improving the stability and efficiency of the photoanode.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Energy & Fuels
Jun Sung Jang, Vijay C. Karade, Mahesh P. Suryawanshi, Dong Min Lee, Jihun Kim, Suyoung Jang, Myeong Cheol Baek, Mingrui He, Jin Hyeok Kim, Seung Wook Shin
Summary: This study reports the improved long-term stability of kesterite Cu2ZnSn(S,Se)(4) (CZTSSe) thin-film solar cells (TFSCs) using oxide/metal/oxide (OMO)-based transparent conducting electrodes (TCEs), specifically ZnO-based oxide/Ag/Al-doped ZnO (AZO), with post heating treatment. The CZTSSe TFSCs with Ga-doped ZnO containing OMO TCEs show excellent long-term stability with minimal power conversion efficiency (PCE) losses, while TFSCs with conventional AZO TCEs experience significant PCE losses after several months. The passivation mechanism of the Ag-doped ZnO interfacial layer in the OMO TCEs is also demonstrated.
Article
Chemistry, Physical
Tae Sik Koh, Periyasamy Anushkkaran, Jun Beom Hwang, Sun Hee Choi, Weon-Sik Chae, Hyun Hwi Lee, Jum Suk Jang
Summary: In this study, an Al-Zr/HT photoanode was fabricated by magnetron sputtering deposition of an Al-layer on Zr-doped FeOOH samples. The correlations between the thicknesses of the sputtered Al-layer and the photoelectrochemical characteristics were investigated. The optimized Al-Zr/HT photoanode exhibited higher photocurrent and lower onset potential compared to the bare Zr/HT photoanode.
Article
Multidisciplinary Sciences
Sang Eon Jun, Youn-Hye Kim, Jaehyun Kim, Woo Seok Cheon, Sungkyun Choi, Jinwook Yang, Hoonkee Park, Hyungsoo Lee, Sun Hwa Park, Ki Chang Kwon, Jooho Moon, Soo-Hyun Kim, Ho Won Jang
Summary: This study demonstrates the decoration of iridium single atoms (SAs) on silicon photoanodes, and assesses their role in separating and transferring photogenerated charge carriers. By embedding the iridium SAs in a NiO/Ni thin film, a benchmarking photoelectrochemical performance is achieved with high photocurrent density and stability. This research provides insights into the rational design of SAs on silicon photoelectrodes and the potential of iridium SAs in boosting photogenerated charge carrier kinetics.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Shouli Bai, Shiyu Jia, Yingying Zhao, Pinggui Tang, Yongjun Feng, Ruixian Luo, Dianqing Li, Aifan Chen
Summary: Ti-doped α-Fe2O3 nanorods were used as a photoanode and were integrated with a NiFe-LDH catalyst through electrodeposition to improve the efficiency of solar PEC water splitting. The structure and properties of the electrode materials were characterized, and the PEC properties of the photoanodes were measured. The enhanced photocurrent density and IPCE value were attributed to the dual action of doping and catalysis, which led to the separation of photogenerated electron-hole pairs, an increase in carrier density, and an acceleration of carrier transfer rate.
INORGANIC CHEMISTRY
(2023)
Article
Polymer Science
Benedict Wen-Cheun Au, Kah-Yoong Chan, Gregory Soon How Thien, Mian-En Yeoh, Mohd Zainizan Sahdan, Hanabe Chowdappa Ananda Murthy
Summary: Over the past few decades, the research on electrochromism has focused on altering the optical transmittance of electrochromic (EC) materials using a small applied voltage. Tungsten oxide (WO3) is commonly used in EC devices (ECDs) to achieve this effect. In this study, WO3 films were produced using a sol-gel spin-coating method, and the influence of various transparent conducting oxides (TCOs) on the construction of ECDs was investigated. The combination of fluorine-doped tin oxide (FTO) and indium-doped tin oxide (ITO) as the TCO and counter electrode, respectively, exhibited the highest coloration efficiency.
Article
Energy & Fuels
Iqbal Singh, Viplove Bhullar, Aman Mahajan
Summary: This study focuses on improving the performance of quantum dot-sensitized TiO2 photoanodes using graphene nanoribbons (GNRs) to reduce recombinations and enhance electron transport. The optimized photoanodes show higher power conversion efficiency and photocurrent density in quantum dot-sensitized solar cells and photoelectrochemical water-splitting applications.
Article
Chemistry, Physical
Bhagatram Meena, Palyam Subramanyam, Duvvuri Suryakala, Vasudevanpillai Biju, Challapalli Subrahmanyam
Summary: The study demonstrates the fabrication of a ternary photoanode (TiO2/Ag2Se/CdS) with low charge transfer resistance and high photocurrent density, achieving an estimated photon-to-hydrogen conversion efficiency of 14%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Shouli Bai, Ke Tian, Jonathan Chenhui Meng, Yingying Zhao, Jianhua Sun, Kewei Zhang, Yongjun Feng, Ruixian Luo, Dianqing Li, Aifan Chen
Summary: A ternary photoanode of SnO2/BiVO4/rGO was fabricated and it showed significantly improved photocurrent density and IPCE compared to a BiVO4 photoanode, mainly due to the formation of n-n heterojunctions and decoration of rGO which enhanced the absorption of light and electron transfer efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Sang Youn Chae, Noyoung Yoon, Oh Shim Joo, Eun Duck Park
Summary: The electrochemical activation of CuInS2/MoSx for photoelectrochemical H-2 production was investigated using in operando Raman spectroscopy for the first time. The activation process resulted in the transformation of metallic MoSx to semiconducting MoSx, enhancing charge carrier transfer between CuInS2 and MoSx. Ex situ X-ray photoelectron spectroscopy and Raman spectroscopy indicated the presence of MoO3 after activation, but in operando Raman spectroscopy provided insight into the intermediate steps of the process that contradicted these results.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Guocheng Deng, Jimin Kim, Megalamane S. Bootharaju, Fang Sun, Kangjae Lee, Qing Tang, Yun Jeong Hwang, Taeghwan Hyeon
Summary: Atomically monodisperse nanostructured materials have significant importance in unraveling catalytic relationships. In this study, the synthesis and structure of a copper-containing alloy nanocluster were reported, which showed excellent catalytic activity and stability in the electrochemical CO2 reduction reaction. Density functional theory calculations revealed the mechanism behind the formation of efficient active sites.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Songwoung Hong, Woo Lee, Yun Jeong Hwang, Seungwoo Song, Seungwook Choi, Hyun Rhu, Jeong Hyun Shim, Ansoon Kim
Summary: To prevent photocorrosion, a thick TiO2 film with electrical leakage was deposited onto an n-Si photoanode surface. Modulating the defect density of the TiOx film enhanced hole transport and water-splitting activity. The photoanode with optimal defect density retained 85% of the initial current density after 100 hours.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Sang Youn Chae, Noyoung Yoon, Eun Duck Park, Oh Shim Joo
Summary: In this study, the photoelectrochemical activity of CuInS2 photocathodes was investigated after sequential surface modification with a-MoSx, Pt, or Ru. The results showed that a Ru-modified CuInS2/a-MoSx photocathode exhibited higher photoelectrochemical activities compared to a Pt-modified one. The high activity of the Ru modification was found to be due to the more suitable energy level of Ru on the photocathode, which improved the electron transfer and carrier lifetime during photoelectrochemical reaction.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Adeel Mehmood, Sang Youn Chae, Eun Duck Park
Summary: In this study, Rh-(C)i/HCO(3)(-)hetero-/homogenous dual co-catalysts were introduced on the BiVO4 surface to improve its water oxidation performance. This dual co-catalyst system enhanced the charge injection efficiency and stabilized the photoelectrochemical water oxidation kinetics of BiVO4. BiVO4 decorated with Rh-C-i/HCO3- exhibited a higher photocurrent (2.011 mA.cm(-2)) at 1.23 VRHE compared to bare BiVO4 (1.217 mA.cm(-2)).
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Noyoung Yoon, Oh Shim Joo, Sang Youn Chae, Eun Duck Park
Summary: This review summarizes studies on CuInS2-based PEC cells for H-2 production. It explores the theoretical background of PEC H-2 evolution and properties of the CuInS2 semiconductor. Strategies to improve CuInS2 photoelectrodes, such as synthesis methods, nanostructure development, heterojunction construction, and cocatalyst design, are examined.
Article
Chemistry, Multidisciplinary
Si Young Lee, Jimin Kim, Gwangsu Bak, Eunchong Lee, Dayeon Kim, Suhwan Yoo, Jiwon Kim, Hyewon Yun, Yun Jeong Hwang
Summary: In this study, the effect of cations on *CO intermediates on the Cu(OH)(2)-derived catalyst was directly observed in real-time. Different sensitivities to the cation-induced field were found for two *CO intermediates, with *COHFB being the dominant active species. Furthermore, a decrease in the hydrated cation size promoted C-C coupling and suppressed C1 product formation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Jiwon Kim, Jae Hyung Kim, Cheoulwoo Oh, Hyewon Yun, Eunchong Lee, Hyung-Suk Oh, Jong Hyeok Park, Yun Jeong Hwang
Summary: An electro-assisted approach using acid-treated carbon electrocatalyst and in-situ cathodically generated reactive oxygen species is proposed for the partial oxidation of methane at ambient temperature and pressure. Reactive oxygen species activate methane and methanol, leading to selective methane partial oxidation. This study presents a method for the electrochemically assisted partial oxidation of methane to produce liquid oxygenate, HCOOH, selectively.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hyewon Yun, Woong Choi, Dongwoo Shin, Hyung-Suk Oh, Yun Jeong Hwang
Summary: Tailoring catalyst performance in zero-gap MEA electrolyzers is crucial. However, few studies have directly focused on MEA systems combined with operando techniques. This study demonstrates improved catalytic performance of AuAg bimetallic catalyst by adjusting the atomic arrangement and extrinsic properties. The catalyst achieved high CO selectivity and CO partial current density and mass activity through proper adjustment of the carbon support.
Article
Chemistry, Physical
Chaeeun Lim, Dongkyu Kim, Mingyun Kim, Hyeju Yun, Dongwoo Shin, Yun Jeong Hwang, Hyeyoung Shin, Kijung Yong
Summary: In this study, a sulfur-derived solid-electrolyte interface (SEI) was introduced to enhance the stability and energy efficiency of Li-mediated nitrogen reduction reaction (Li-NRR). By engineering the physical structure of SEI, the ion conductivity and electron insulation properties were improved, leading to better Li plating uniformity and reduced electrolyte decomposition. The introduction of sulfur maintained a steady cell potential over 20 h, significantly enhancing energy efficiency.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Eunchong Lee, Jae Hyung Kim, Juhyung Choi, Yewon Hong, Dongwoo Shin, Hyewon Yun, Jimin Kim, Gwangsu Bak, Seongin Hong, Yun Jeong Hwang
Summary: In this study, the electrochemical oxidation reaction of furfural to produce maleic acid was investigated. It was found that doping lead oxide with bismuth effectively tuned the activity for the oxidation reaction and increased the selectivity for maleic acid production. The addition of bismuth suppressed the overoxidation of maleic acid to carbon dioxide. These results suggest that mixed metal oxides can be utilized to adjust the oxidation activity and enhance selective electrosynthesis from biomass conversion.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Amjad Khan, Gul Rahman, Anwar ul Haq Ali Shah, Sang Youn Chae, Shabeer Ahmad Mian
Summary: A cost-effective, single-step chemical route was used to grow hierarchical, multidimensional structures of nickel sulfide (NixSy) on a stainless steel substrate (SS). The crystallinity and surface morphology of the deposited material were strongly influenced by the growth temperature. The NixSy/SS electrode prepared at 100°C demonstrated excellent energy storage performance due to its 3D web-like morphology and achieved a specific capacity of 14 mA h g(-1), energy density of 8.9 Wh kg(-1), and power density of 506 W kg(-1).
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Younghyun Chae, Kyeongsu Kim, Hyewon Yun, Dongjin Kim, Wonsang Jung, Yun Jeong Hwang, Ung Lee, Dong Ki Lee, Byoung Koun Min, Woong Choi, Da Hye Won
Summary: The study investigates the impact of substrate on the performance of the electrochemical CO2 reduction reaction. It reveals that a porous carbon paper substrate facilitates CO2 supply and diffusion, leading to higher efficiency in CO2RR.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Guocheng Deng, Hyewon Yun, Megalamane S. Bootharaju, Fang Sun, Kangjae Lee, Xiaolin Liu, Seungwoo Yoo, Qing Tang, Yun Jeong Hwang, Taeghwan Hyeon
Summary: Studying the atomistic synergistic effects of nanoalloys on the electrocatalytic CO2 reduction reaction is crucial, but determining the atomic-level structure of appropriate analogues is challenging. In this study, a one-pot synthesis and structure characterization of an AuCu nanoalloy cluster catalyst were reported, which provided insights into the atomistic synergistic effects of Au and Cu on the reaction. The results showed that the AuCu nanoalloy exhibited excellent catalytic performance in the CO2 reduction reaction, with higher CO Faradaic efficiency and CO partial current density compared to the closest monometal analogue.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Suhyun Lee, Woong Choi, Jae Hyung Kim, Sohyeon Park, Yun Jeong Hwang, Jonggeol Na
Summary: This study evaluates the economic and environmental potential of direct electrochemical conversion of captured CO2 technology through techno-economic analysis and life cycle assessment. The results indicate that the technology has good economic potential if developed to the same level as the conventional CO2 reduction reaction process. Moreover, the environmental impact of the technology is positive, especially when using renewable electricity.
