Yongju Yun
포항공과대학교 화학공학과 · 화학공학
윤용주 교수 연구실은 표면과학과 촉매 공학을 기반으로 자연적으로 편광성인 금속 표면에서의 에너티오선택적 흡착 및 촉매 반응을 연구하고 있습니다. 특히 아미노산의 레보-와 디아이오머 형태가 표면에 어떻게 선택적으로 흡착되고, 이들이 동일한 표면에서 라세미체 또는 동질적 클러스터를 형성하는지를 13C 라벨링과 질량 분석을 통해 정량적으로 규명하고 있습니다. 또한 루테늄 기반 촉매를 활용한 암모니아 분해 반응에서 강한 금속-지지체 상호작용(SMSI)을 제어하여 수소 에너지 저장 및 전환 기술의 핵심 촉매를 개발하고 있습니다. 이 연구들은 고순도 레이저 화학물질의 대량 합성과 탄소 배출이 없는 수소 공급 체계를 위한 기초를 마련하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Unequivocal evidence of enantioselective, equilibrium separation of a racemic mixture on a naturally chiral metal surface is presented for the first time. The enantioselectivity is much higher than that of chiral molecules on mineral surfaces. Furthermore, the quantitative nature of the 13C labeling method provides the first direct measure of an enantiospecific adsorption energy difference on a chiral metal surface. As a service to our authors and readers, this journal provides supporting inform
Gas-phase equilibrium adsorption of D- and L-serine (Ser) mixtures and D- and L-phenylalanine (Phe) mixtures has been studied on the naturally chiral Cu{3,1,17}(R&S) surfaces. (13)C labeling of the l enantiomers (*L-Ser and *L-Phe) has enabled mass spectrometric enantiodiscrimination of the species desorbing from the surface following equilibrium adsorption. On the Cu{3,1,17}(R&S) surfaces, both equilibrium adsorption and the thermal decomposition kinetics of the D and *L enantiomers exhibit dia
The development of highly efficient Ru-based catalysts for NH3 decomposition is necessary to enable the utilization of NH3 as a COx-free H2 carrier. Modulation of the interactions between the basic support materials and Ru particles significantly enhances the performance of Ru-based catalysts for NH3 decomposition. In this study, the strong metal–support interaction (SMSI) interface between the BaCeO3 perovskite support and Ru particles was controlled by yttrium (Y) doping in the range of 0–20 m
Equilibrium adsorption of gas phase mixtures of d- and l-alanine (Ala) onto the naturally chiral Cu{3,1,17}R&S surfaces has been studied by both experiment and DFT-based modeling. Isotopically labeled *l-Ala (HO213CCH(NH2)CH3) and unlabeled d-Ala allow mass spectrometric enantiodifferentiation of the adsorbed species during temperature-programmed decomposition, following equilibrium adsorption. Measurements of the relative equilibrium coverages of d- and *l-Ala on the Cu{3,1,17}R&S surfaces, θD/
Heterogeneous enantioselective catalysis is considered a promising strategy for the large-scale production of enantiopure chemicals. In this work, polymer-capped Pt nanocatalysts having a uniform size were synthesized using poly(vinyl pyrrolidone) (PVP) and poly(vinyl alcohol) and supported on γ-Al2O3. After a facile heat treatment process, their catalytic performance for enantioselective hydrogenation of α-keto esters, a structure-sensitive reaction, was investigated. The presence of residual c
The enantiospecific adsorption of enantiomer mixtures on surfaces is dictated by two competing forces: the enantiospecificity of adsorption energetics and the propensity of enantiomers to aggregate into homochiral (conglomerate) or heterochiral (racemate) clusters. These phenomena have been studied by measuring the surface enantiomeric excess, ees, of chiral amino acid mixtures adsorbed on Cu single-crystal surfaces and in equilibrium with gas-phase mixtures of varying enantiomeric excess, eeg.
