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HIGHLY CITED PAPERS (HCP)

  • 전임교원이 최근 5년간 출판한 논문 중, 연도별 카테고리별 피인용 상위 1%에 달성된 논문
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SCIE Article
High-Alkaline Water-Splitting Activity of Mesoporous 3D Heterostructures: An Amorphous-Shell@Crystalline-Core Nano-Assembly of Co-Ni-Phosphate Ultrathin-Nanosheets and V- Doped Cobalt-Nitride Nanowires
Author
Singh, Thangjam Ibomcha; Yoo, Sunghoon; Lee, Sang Uck; Lee, Seunghyun; Cha, Dun Chan; Maibam, Ashakiran; Babarao, Ravichandar
Corresponding Author Info
Prof. Lee, Seunghyun (화학분자공학과 이승현 교수)
Professor
E-mail
이메일leeshyun@hanyang.ac.kr
Document Type
Source
ADVANCED SCIENCE 2022, 9, 23
Times Cited
43 (2024.01.31.)
External Information
http://dx.doi.org/10.1002/advs.202201311
Abstract
[History]
- 이 논문은(는) 2023 년 January/February부로, 이 Highly Cited Paper 의 인용 횟수가 분야와 출판 연도에 대해 인용 빈도가 높은 임계값을 기반으로 Physics 학술 분야에서 상위 1%에 올랐습니다.

[Abstract]
Introducing amorphous and ultrathin nanosheets of transition bimetal phosphate arrays that are highly active in the oxygen evolution reaction (OER) as shells over an electronically modulated crystalline core with low hydrogen absorption energy for an excellent hydrogen evolution reaction (HER) can boost the sluggish kinetics of the OER and HER in alkaline electrolytes. Therefore, in this study, ultrathin and amorphous cobalt-nickel-phosphate (CoNiPOx) nanosheet arrays are deposited over vanadium (V)-doped cobalt-nitride (V-3%-Co4N) crystalline core nanowires to obtain amorphous-shell@crystalline-core mesoporous 3D-heterostructures (CoNiPOx@V-Co4N/NF) as bifunctional electrocatalysts. The optimized electrocatalyst shows extremely low HER and OER overpotentials of 53 and 270 mV at 10 mA cm(-2), respectively. The CoNiPOx@V-3%-Co4N/NF (+/-) electrolyzer utilizing the electrocatalyst as both anode and cathode demonstrates remarkable overall water-splitting activity, requiring a cell potential of only 1.52 V at 10 mA cm(-2), 30 mV lower than that of the RuO2/NF (+)/20%-Pt/C/NF (-) electrolyzer. Such impressive bifunctional activities can be attributed to abundant active sites, adjusted electronic structure, lower charge-transfer resistance, enhanced electrochemically active surface area (ECSA), and surface- and volume-confined electrocatalysis resulting from the synergistic effects of the crystalline V-3%-Co4N core and amorphous CoNiPOx shells boosting water splitting in alkaline media.
Web of Science Categories
Chemistry; Science & Technology - Other Topics; Materials Science
Funding
Language
English
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