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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Precipitating Metal Nitrate Deposition of Amorphous Metal Oxyhydroxide Electrodes Containing Ni, Fe, and Co for Electrocatalytic Water Oxidation

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dc.contributor.author Kim, Young Kyeong ko
dc.contributor.author Kim, Jin Hyun ko
dc.contributor.author Jo, Yim Hyun ko
dc.contributor.author Lee, Jae Sung ko
dc.date.available 2019-11-15T00:23:36Z -
dc.date.created 2019-10-25 ko
dc.date.issued 2019-10 ko
dc.identifier.citation ACS CATALYSIS, v.9, no.10, pp.9650 - 9662 ko
dc.identifier.issn 2155-5435 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/30352 -
dc.description.abstract We report here a facile, one-step precipitating metal nitrate deposition (PMND) method to prepare amorphous metal oxyhydroxide films containing Fe, Co, and Ni as efficient electrocatalysts for water oxidation. The unique synthesis technique allows easy control of the metal composition over a wide range on various substrates. A series of unary and binary metal oxyhydroxides of 30 compositions are synthesized by PMND on fluorine-doped tin oxide (FTO) substrate as water oxidation electrocatalysts. The activity of the metal oxyhydroxide films is represented by a volcano plot as a function of a single experimental descriptor, i.e., the fraction of hydroxide in the surface oxygen species. The optimum compositions for binary metal oxyhydroxide (NiFe, NiCo, and CoFe) are determined on conductive substrates of FTO, nickel foam (NF), nickel mesh (NM), and carbon felt (CF), and the best NiFe (2:8) electrocatalyst on NF exhibits a water oxidation current density of 100 mA/cm(2) with only 280 mV of overvoltage, which outperforms conventional noble metal catalysts like IrOx and RuOx in an alkaline medium. Finally, we demonstrate a tandem PV-electrolysis system by using a c-Si PV module with a power conversion efficiency of 13.71% and an electrochemical cell composed of NiFe (2:8)/NF anode and a bare NF cathode with a conversion efficiency of 71.8%, which records a solar-to-hydrogen conversion efficiency of 9.84%. ko
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Precipitating Metal Nitrate Deposition of Amorphous Metal Oxyhydroxide Electrodes Containing Ni, Fe, and Co for Electrocatalytic Water Oxidation ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85072987707 ko
dc.identifier.wosid 000489204000090 ko
dc.type.rims ART ko
dc.identifier.doi 10.1021/acscatal.9b02701 ko
dc.identifier.url https://pubs.acs.org/doi/10.1021/acscatal.9b02701 ko
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