Jong Hyeok Park

Abstract Ni 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. Phosphorizati

Lithium-ion battery (LIB) has been a tremendous success for decades. As the demand for rechargeable batteries surges, a need has arisen for low-cost secondary batteries. Among various studies, sodium-ion battery (SIB) is the most promising secondary batteries due to its similar working principles and the abundance of sodium in the natural world. Among many anode materials for SIB, MoS­­ 2 has attracted attention because it can intercalate sodium ions in its layered structure. However, in the rep

Abstract Water‐based electrolytes provide safe, reliable, and cost‐effective energy storage solutions; however, their application in aqueous lithium‐ion batteries is hindered by low energy density and short cycling life due to the limited electrochemical stability window. While high lithium salt concentrations can mitigate some of these issues, they often lead to increased solvent viscosity and higher costs, limiting commercialization. In this study, a boron‐stabilized anisotropic polyvinyl alco

Nitrogen trifluoride (NF 3 ), a widely used gas in the semiconductor and display industry, has significant environmental implications because of its high radiative forcing properties and slow decomposition rate. The safe handling and recycling/upcycling of NF 3 gas can play a crucial role in environmental protection and mitigating global warming. This study investigates the decomposition of NF 3 and the characteristics of the fluorine compounds generated through its reaction with liquid tin, exp

본 논문에서는 실시간 객체 탐지(Real-time Object Detection)가 가능한 YOLOv4 모델과DeepSORT 알고리즘을 활용한 객체 추적(Object Tracking) 기술을 활용하여 CCTV 영상 이미지 기반의 화재 탐지 시스템을 제안한다. 화재 탐지 모델은 10800장의 학습용 데이터로부터 학습되었으며 1000장의 별도 테스트 셋을 통해 검증되었다. 이후 DeepSORT 알고리즘을 통해 탐지된 화재영역을 추적하여 단일 이미지 내의 화재 탐지율과 영상 내에서의 화재 탐지 유지성능을 증가시켰다. 영상 내의 한 프레임 혹은 단일 이미지에 대한 화재 탐지 속도는 장당 0.1초 이내로 실시간탐지가 가능함을 확인하였으며 본 논문의 AI 화재 탐지 시스템은 기존의 화재 사고 탐지 시스템보다 안정적이고 빠른 성능을 지니고 있어 화재현장에 적용 시 화재를 조기 발견하여 빠른 대처및 발화단계에서의 진화가 가능할 것으로 예상된다.

Proton Exchange Membrane Water Electrolysis In article number 2503601, Jong Hyeok Park, Sechan Lee, Changsoo Lee, Hyun-Seok Cho, and co-workers report a titanium-modified, hybrid-phase IrO2 anode for PEM water electrolysis that integrates composite and solid-solution domains to tune Ir–O bond distances and dynamics. In situ X-ray analysis reveals bias-induced Ir–O elongation that promotes formation of OOH intermediates, mitigating Ir dissolution and improving OER activity. This work provides a p

Abstract To realize a sustainable energy transition, water electrolysis—particularly proton exchange membrane water electrolysis (PEMWE)—holds significant promise. However, practical deployment is hindered by the cost and instability of the anode catalyst, IrO 2 . Recent studies indicate that tuning the Ir─O bond distance, via doping or composite formation, is key to enhancing the oxygen evolution reaction (OER) performance of IrO 2 ‐based electrocatalysts. Herein, a hybrid‐phase Ti‐incorporated

The development of new types of energy generation devices is promoted by increasing public awareness that the Earth's oil reserves could run out during this century. As the energy needs of the planet are likely to double within the next 50 years, the stage is set for a major energy shortage, unless renewable energy can cover the substantial deficit left by fossil fuels. Photoelectrochemical (PEC) solar water splitting has become a central research theme for more than four decades, still, their e

Despite a longstanding controversy surrounding TiO 2 materials, TiO 2 polymorphs with heterojunctions composed of anatase and rutile outperform individual polymorphs because of the type-II energetic band alignment at the heterojunction interface. Improvement in photocatalysis has also been achieved via black TiO 2 with a thin disorder layer surrounding ordered TiO 2 . However, localization of this disorder layer in a conventional single TiO 2 nanoparticle with the heterojunction composed of anat

High-Ni NCM cathodes (Ni ≥80%) have attracted extensive attention for high-energy-density lithium-ion batteries due to their high theoretical capacity. However, the high reactivity of Ni³⁺/⁴⁺ exacerbates critical issues, including electrolyte oxidation, irreversible phase transitions (layered → spinel → rock salt), gas evolution, transition metal dissolution, and microcrack formation. Moreover, the similar ionic radii of Ni²⁺ (0.69 Å) and Li⁺ (0.76 Å) promote cation mixing, compromising the stab

Lithium-ion batteries dominate applications from portable electronics to electric vehicles owing to high energy density and long cycle life. As energy targets rise, thick, high-loading electrodes become essential. In conventional manufacturing, slurry-coated electrodes (SCEs) disperse active material, carbon, and binder in N-methyl-2-pyrrolidone (NMP) and require drying and solvent recovery, increasing energy use, process time, and factory footprint. As thickness increases, cracking and binder m