Haeseong Jang
UNIST 에너지공학과 · 에너지
하세ונג 교수의 연구실은 전기화학 반응의 효율성을 극대화하기 위해 나노구조 촉매의 전자적 비대칭성과 내재 전기장 구조를 정밀하게 설계하는 데 초점을 맞추고 있습니다. 주로 알칼리성 및 산성 조건에서의 수소 발생 반응(HER)과 산소 발생 반응(OER)을 대상으로 하며, 루테니움 기반 나노촉매의 전자구조 제어를 통해 반응 메커니즘을 최적화합니다. 이론적 계산(DFT)과 실험을 융합한 다학제적 접근을 통해 고성능·내구성 있는 수소 생산 촉매를 개발하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Although great efforts on the delicate construction of a built-in electric field (BIEF) to modify the electronic properties of active sites have been conducted, the substantial impact of BIEF coupled with electrode potential on the electrochemical reactions has not been clearly investigated. Herein, we designed an alkaline hydrogen evolution reaction (HER) catalyst composed of heterogeneous Ru-CoP urchin arrays on carbon cloth (Ru-CoP/CC) with a strong BIEF with the guidance of density functiona
Abstract Ruthenium oxide is currently considered as the promising alternative to Ir‐based catalysts employed for proton exchange membrane water electrolyzers but still faces the bottlenecks of limited durability and slow kinetics. Herein, a 2D amorphous/crystalline heterophase ac‐Cr 0.53 Ru 0.47 O 2‐δ substitutional solid solution with pervasive grain boundaries (GBs) is developed to accelerate the kinetics of acidic oxygen evolution reaction (OER) and extend the long‐term stability simultaneous
Abstract Modulating the electronic asymmetricity of catalysts is an effective method for optimizating the elementary steps of water dissociation and hydrogen adsorption/desorption process for the alkaline hydrogen evolution reaction (HER). Herein, uniform Ru nanoclusters anchored on N doped ultrathin carbon nanosheets (Ru/NC) are synthesized to optimize the asymmetricity electronic properties of supported Ru for efficient HER. It is found that Ru and NC with a large work function difference (Δ Φ
