Ulsan National Institute of Science and Technology · Energy
Professor Haeseong Jang's research lab specializes in the design and development of advanced electrocatalysts for sustainable energy conversion and storage, with a strong focus on optimizing electronic structures for enhanced electrochemical performance. The lab primarily investigates heterogeneous catalysts—particularly based on ruthenium and transition metal phosphides—for applications in hydrogen evolution and oxygen evolution reactions under both alkaline and acidic conditions. By integrating advanced characterization techniques with first-principles calculations, the group explores the role of built-in electric fields, electronic asymmetry, and heterophase interfaces in improving catalytic activity and stability. Their work aims to overcome key limitations in electrocatalysts, such as poor durability and sluggish kinetics, through rational nanostructure engineering.
Figures are computed from collected data and may differ slightly.
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
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