Dong Ki Lee
@kist.re.kr
Korea Institute of Science and Technology
EDUCATION
PhD. MSE, KAIST 2015
MS. MSE, KAIST 2011
BS. MSE, Korea Univ 2009
RESEARCH, TEACHING, or OTHER INTERESTS
Electrochemistry, Materials Science, Speech and Hearing
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Yeon Ji Lee, Byeong Cheul Moon, Dong Ki Lee, Jung Ho Ahn, Gyeongtaek Gong, Youngsoon Um, Sun-Mi Lee, Kyoung Heon Kim, and Ja Kyong Ko
Elsevier BV
Woong Choi, Younghyun Chae, Ershuai Liu, Dongjin Kim, Walter S. Drisdell, Hyung-suk Oh, Jai Hyun Koh, Dong Ki Lee, Ung Lee, and Da Hye Won
Springer Science and Business Media LLC
Younghyun Chae, Hyunwook Kim, Dong Ki Lee, Ung Lee, and Da Hye Won
Elsevier BV
Ji Eun Yoon, Ki Bong Lee, Chun-Jae Yoo, Byoung Koun Min, Dong Ki Lee, Da Hye Won, Sangwon Kim, Jong-Ho Moon, Changsoo Kim, and Ung Lee
Elsevier BV
Byeong Cheul Moon, Soyoung Kim, Young Yoon Jo, Jong Hyeok Park, Ja Kyong Ko, and Dong Ki Lee
Wiley
AbstractH2‐driven microbial electrosynthesis (MES) is an emerging bioelectrochemical technology that enables the production of complex compounds from CO2. Although the performance of microbial fermentation in the MES system is closely related to the H2 production rate, high‐performing metallic H2‐evolving catalysts (HEC) generate cytotoxic H2O2 and metal cations from undesirable side reactions, severely damaging microorganisms. Herein, a novel design for self‐detoxifying metallic HEC, resulting in biologically benign H2 production, is reported. Cu/NiMo composite HEC suppresses H2O2 evolution by altering the O2 reduction kinetics to a four‐electron pathway and subsequently decomposes the inevitably generated H2O2 in sequential catalytic and electrochemical pathways. Furthermore, in situ generated Cu‐rich layer at the surface prevents NiMo from corroding and releasing cytotoxic Ni cations. Consequently, the Cu/NiMo composite HEC in the MES system registers a 50% increase in the performance of lithoautotrophic bacterium Cupriavidus necator H16, for the conversion of CO2 to a biopolymer, poly(3‐hydroxybutyrate). This work successfully demonstrates the concept of self‐detoxification in designing biocompatible materials for bioelectrochemical applications as well as MES systems.
Rahul Purbia, Sung Yeol Choi, Chae Heon Woo, Jiho Jeon, Chulwan Lim, Dong Ki Lee, Jae Young Choi, Hyung-Suk Oh, and Jeong Min Baik
Elsevier BV
Kezia Langie, Gwangsu Bak, Ung Lee, Dong Ki Lee, Chan Woo Lee, Yun Jeong Hwang, and Da Hye Won
Royal Society of Chemistry (RSC)
A comprehensive review of direct captured CO2 electro-conversion technology, a promising Carbon Capture and Utilization (CCU) technology that can achieve both techno-economic and environmental viability.
Seid Mingizem Gashaw, Aseom Son, Wondesen Workneh Ejerssa, Seung Yong Lee, Seongpil Jeong, Dong Ki Lee, Kangwoo Cho, and Seok Won Hong
American Chemical Society (ACS)
Jongin Woo, Jinu Choi, Juhyung Choi, Mi‐Young Lee, Eunji Kim, Sang Yun, Suhwan Yoo, Eunchong Lee, Ung Lee, Da Hye Won,et al.
Wiley
AbstractNi phosphides and NiCo alloys are extensively explored for their remarkable efficiency in biomass alcohol oxidations, yet the underlying mechanisms remain inadequately understood. This study thoroughly elucidates the roles of Ni, Co, and P in improving the catalytic performance of Ni‐Co‐P catalysts for the electrochemical conversion of 5‐hydroxymethylfurfural (HMF) to 2,5‐furandicarboxylic acid (FDCA), a promising biomass‐derived building block replacing terephthalic acid. Phosphorization of Ni results in the partial formation of Ni2P phase and significantly boosts the formation of the reactive NiOOH phase on the surface, which is the crucial catalytic phase for converting HMF into FDCA. The integration of Co into the heterojunction between Ni2P and NiOOH enhances the oxidation reactivity of 5‐formyl‐2‐furancarboxylic acid (FFCA), a pivotal intermediate influencing FDCA productivity, by selectively stabilizing aldehydes, thereby promoting further oxidation rather than surface desorption. in situ/operando spectroscopic analyses consistently highlight the equal significance of the rapid generation of NiOOH and the robust adsorption of reactant molecules at the surface in achieving high catalytic performance. These insights into elemental contributions set a new standard for designing multi‐component electrocatalysts for efficient biomass alcohol oxidation.
Ji Hwan Song, Seohyeon Ka, Chulwan Lim, Man Ho Han, Dong Ki Lee, Hyung-Suk Oh, and Woong Hee Lee
Royal Society of Chemistry (RSC)
In situ pH measurements are carried out to elucidate the CO2RR anode environment. It is revealed that local pH near the anode goes through severe fluctuation, and a guideline for the development of anode material for CO2RR is suggested.
Woong Hee Lee, Kyeongsu Kim, Jai Hyun Koh, Dong Ki Lee, Da Hye Won, Hyung-Suk Oh, Ung Lee, and Byoung Koun Min
Elsevier BV
Cheng Lin, Chaoran Dong, Sungsoon Kim, Yuan Lu, Yulan Wang, Zhiyang Yu, Yu Gu, Zhiyuan Gu, Dong Ki Lee, Kan Zhang,et al.
Wiley
The photo‐electrochemical (PEC) oxidation of glycerol (GLY) to high‐value‐added dihydroxyacetone (DHA) can be achieved over a BiVO4 photoanode, while the PEC performance of most BiVO4 photoanodes is impeded due to the upper limits of the photocurrent density. Here, an enhanced Mie scattering effect of the well‐documented porous BiVO4 photoanode is obtained with less effort by a simple annealing process, which significantly reduces the reflectivity to near zero. The great light absorbability increases the basic photocurrent density by 1.77 times. The selective oxidation of GLY over the BiVO4 photoanode results in a photocurrent density of 6.04 mA cm−2 and a DHA production rate of 325.2 mmol m−2 h−1 that exceeds all reported values. This work addresses the poor ability of nanostructured BiVO4 to harvest light, paving the way for further improvements in charge transport and transfer to realize highly efficient PEC conversion.
Younghyun Chae, Kyeongsu Kim, Hyewon Yun, Dongjin Kim, Wonsang Jung, Yun Jeong Hwang, Ung Lee, Dong Ki Lee, Byoung Koun Min, Woong Choi,et al.
Royal Society of Chemistry (RSC)
To design active and selective catalysts for deriving value-added C2+ chemicals from the electrochemical CO2 reduction reaction, comprehensive studies on the catalyst system are necessary.
Kezia Megagita Gerby Langie, Kyungjae Tak, Changsoo Kim, Hee Won Lee, Kwangho Park, Dongjin Kim, Wonsang Jung, Chan Woo Lee, Hyung-Suk Oh, Dong Ki Lee,et al.
Springer Science and Business Media LLC
AbstractCarbon capture and utilization technology has been studied for its practical ability to reduce CO2 emissions and enable economical chemical production. The main challenge of this technology is that a large amount of thermal energy must be provided to supply high-purity CO2 and purify the product. Herein, we propose a new concept called reaction swing absorption, which produces synthesis gas (syngas) with net-zero CO2 emission through direct electrochemical CO2 reduction in a newly proposed amine solution, triethylamine. Experimental investigations show high CO2 absorption rates (>84%) of triethylamine from low CO2 concentrated flue gas. In addition, the CO Faradaic efficiency in a triethylamine supplied membrane electrode assembly electrolyzer is approximately 30% (@−200 mA cm−2), twice higher than those in conventional alkanolamine solvents. Based on the experimental results and rigorous process modeling, we reveal that reaction swing absorption produces high pressure syngas at a reasonable cost with negligible CO2 emissions. This system provides a fundamental solution for the CO2 crossover and low system stability of electrochemical CO2 reduction.
Young-Jin Ko, Jun-Yong Kim, Woong Hee Lee, Min Gyu Kim, Tae-Yeon Seong, Jongkil Park, YeonJoo Jeong, Byoung Koun Min, Wook-Seong Lee, Dong Ki Lee,et al.
Springer Science and Business Media LLC
AbstractThe electrosynthesis of formate from CO2 can mitigate environmental issues while providing an economically valuable product. Although stannic oxide is a good catalytic material for formate production, a metallic phase is formed under high reduction overpotentials, reducing its activity. Here, using a fluorine-doped tin oxide catalyst, a high Faradaic efficiency for formate (95% at 100 mA cm−2) and a maximum partial current density of 330 mA cm−2 (at 400 mA cm−2) is achieved for the electroreduction of CO2. Furthermore, the formate selectivity (≈90%) is nearly constant over 7 days of operation at a current density of 100 mA cm−2. In-situ/operando spectroscopies reveal that the fluorine dopant plays a critical role in maintaining the high oxidation state of Sn, leading to enhanced durability at high current densities. First-principle calculation also suggests that the fluorine-doped tin oxide surface could provide a thermodynamically stable environment to form HCOO* intermediate than tin oxide surface. These findings suggest a simple and efficient approach for designing active and durable electrocatalysts for the electrosynthesis of formate from CO2.
Byeong Cheul Moon, Bolormaa Bayarkhuu, Kai A. I. Zhang, Dong Ki Lee, and Jeehye Byun
Royal Society of Chemistry (RSC)
A fine-tuned organic working solution that synergistically combines auto- and photocatalysis achieves one of the highest solar-to-chemical conversion efficiencies of up to 1.1% to coproduce H2O2and aldehyde under simulated sunlight.
Wonsang Jung, Jaewoo Jeong, Younghyun Chae, Woong Hee Lee, Young-Jin Ko, Keun Hwa Chae, Hyung-suk Oh, Ung Lee, Dong Ki Lee, Byoung Koun Min,et al.
Royal Society of Chemistry (RSC)
Bimetallic CuPd oxide alloy electrocatalysts can promote selective ammonia production from the nitrate reduction reaction by accelerating the rate-determining hydrogenation of nitrite, which is a critical intermediate.
Bora Seo, Jongin Woo, Eunji Kim, Seok-Hyeon Cheong, Dong Ki Lee, and Hyunjoo Lee
Elsevier BV
Jongin Woo, Byeong Cheul Moon, Ung Lee, Hyung-Suk Oh, Keun Hwa Chae, Yongseok Jun, Byoung Koun Min, and Dong Ki Lee
American Chemical Society (ACS)
Heesung Eum, Seokhyeon Cheong, Jiyun Kim, Seo-Jung Han, Minserk Cheong, Hyunjoo Lee, Hae-Seok Lee, and Dong Ki Lee
MDPI AG
The removal of nitric oxide (NO), which is an aggregation agent for fine dust that causes air pollution, from exhaust gas has been considered an important treatment in the context of environmental conservation. Herein, we propose a sustainable electrochemical NO removal system based on the reversible Fe2+/Fe3+-ethylenediamine tetraacetic acid (EDTA) redox reaction, which enables continuous NO capture and storage at ambient temperature without the addition of any sacrificial agents. We have designed a flow-type reaction system in which the NO absorption and emission can be separately conducted in the individual reservoirs of the catholyte and anolyte with the continuous regeneration of Fe2+-EDTA by the electrochemical reduction in Fe3+-EDTA. A continuous flow reaction using a silver cathode and glassy carbon anode showed that the concentrations of Fe2+ and Fe3+-EDTA in the electrolyte were successfully maintained at a 1:1 ratio, which demonstrates that the proposed system can be applied for continuous NO capture and storage.
Dong Ki Lee, Stephen R. Kubota, Aurora N. Janes, Michael T. Bender, Jongin Woo, J. R. Schmidt, and Kyoung‐Shin Choi
Wiley
Abstract5‐Hydroxymethylfurfural (HMF), which can be derived from lignocellulosic biomass, is an important platform molecule that can be used to produce valuable biofuels and polymeric materials. Electrochemical reduction of HMF is of great interest as it uses water as the hydrogen source and achieves desired reduction reactions at room temperature and ambient pressure. Hydrogenation and hydrogenolysis are two important reactions for reductive HMF conversion. Therefore, elucidating key characteristics of electrocatalysts that govern the selectivity for hydrogenation and hydrogenolysis is critical in rationally developing efficient and selective electrocatalysts. In this study, combined experimental and computational investigations are used to demonstrate how the adsorption energy of HMF on metal surfaces and the resulting changes in the intramolecular bond lengths of adsorbed HMF directly impact the reduction pathways of HMF. These results make it possible to rationally understand a general trend in the behaviors observed when using various metal electrodes for HMF reduction.
Dongjin Kim, Woong Choi, Hee Won Lee, Si Young Lee, Yongjun Choi, Dong Ki Lee, Woong Kim, Jonggeol Na, Ung Lee, Yun Jeong Hwang,et al.
American Chemical Society (ACS)
Joo‐Hyun Kim, Min Kyu Kim, Abay Gadisa, Samuel J. Stuard, Masrur Morshed Nahid, Soyeong Kwon, Soohyun Bae, Byoungwoo Kim, Gi Soon Park, Da Hye Won,et al.
Wiley
AbstractSolution‐processed Cu(In,Ga)(S,Se)2 (CIGS) has a great potential for the production of large‐area photovoltaic devices at low cost. However, CIGS solar cells processed from solution exhibit relatively lower performance compared to vacuum‐processed devices because of a lack of proper composition distribution, which is mainly instigated by the limited Se uptake during chalcogenization. In this work, a unique potassium treatment method is utilized to improve the selenium uptake judiciously, enhancing grain sizes and forming a wider bandgap minimum region. Careful engineering of the bandgap grading structure also results in an enlarged space charge region, which is favorable for electron–hole separation and efficient charge carrier collection. Besides, this device processing approach has led to a linearly increasing electron diffusion length and carrier lifetime with increasing the grain size of the CIGS film, which is a critical achievement for enhancing photocurrent yield. Overall, 15% of power conversion efficiency is achieved in solar cells processed from environmentally benign solutions. This approach offers critical insights for precise device design and processing rules for solution‐processed CIGS solar cells.
Byungwoo Kim, Gi Soon Park, Joo-Hyun Kim, Sang Yeun Park, Da-Seul Kim, Dong Ki Lee, Da Hye Won, Soyeong Kwon, Dong-Wook Kim, Yoonmook Kang,et al.
American Chemical Society (ACS)
Fabrication of Cu(In,Ga)(S,Se)2 (CIGSSe) absorber films from environmentally friendly solutions under ambient air conditions for use in solar cells has shown promise for the low-cost mass production of CIGSSe solar cells. However, the limited power conversion efficiency (PCE) of these solar cells compared with their vacuum-processed counterparts has been a critical setback to their practical applications. This study aims to fabricate solution-processed CIGSSe solar cells with high PCEs by incorporation of Ag into the precursor layer of the CIGSSe absorber films. The results showed that Ag doping promoted grain growth by accelerating Se uptake irrespective of location within the CIGSSe film. Nevertheless, uniform Ag doping formed crevices that lowered the PCE of the cells, while centrally localizing the doped Ag prevented the formation of crevices, resulting in high PCEs up to 15.3%. Our results demonstrate that carefully doping Ag into a selected area of the precursor layer of CIGSSe films can realize solution-processed chalcopyrite solar cells with high PCE.
Byungwoo Kim, Gi Soon Park, Yun Jeong Hwang, Da Hye Won, Woong Kim, Dong Ki Lee, and Byoung Koun Min
American Chemical Society (ACS)
As CuInGa-based chalcopyrite photocathodes suffer from poor hydrogen evolution activity, n-type overlayers and hydrogen evolution catalysts (HECs) need to be deposited on the film surface to drive ...