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- 저자 : Yujiao Zhu (검색결과 2 건)
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Zhiqiang Hou,Yujiao Zhu,Wenjuan Du,Xiangkun Jia,Tiantian Huang,Ke-Jing Huang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.112 No.-
Design and development superior electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) to future construct a efficient overall water electrolyzer is imperative to relieve energy crisis. Herein, three-dimensional porous network of NiCoP nanosheets being covered by bimetallic phosphides nanoparticles with a ultra-small size of ∼ 7 nm anchored on nickel foam (NF) is synthesized via employing a low-cost hydrothermal and phosphorization reaction, which provides the numerous electrcatalytic active area and reactive sites, benefiting for HER behaviors. Additionally, a top-down structure of F-doped NiCo2Al-LDHs@ZnFeAl-LDHs (F-NC2AL@ZFAL) catalysts supported on NF is also fabricated by a two-step hydrothermal reaction, which could also provide promising OER performances. As expected, the as-prepared HER and OER catalysts manifest the lower overpotential of 58 and 177 mV at 10 mA cm−2 in 1 M KOH solution. Significantly, a overall water electrolyzer assembled by employing the as-prepared HER and OER catalysts displays the various cell voltages of 1.36, 1.55, 1.66, and 1.75 V at the corresponding current densities of 10, 20, 50, and 100 mA cm−2, with the excellent durability for 22 h at 100 mA cm−2. The favorable electrocatalytic behaviors imply the great potential of as-prepared electrocatalysts for overall water splitting.
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Lezhu Su,Lizhou Ou,Yujiao Wen,Yifan Wang,Weilin Zhao,Zhi Zhou,Mei-e Zhong,YONGFA ZHU,Nan Zhou 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.102 No.-
Exploring catalyst materials which are advancing, recyclable and with high catalytic performances toremove persistent organic pollutants such as Quinclorac (QNC) is important. In this work, a novel Ndopedcarbon support CoFe2O4/Fe0 hybrid catalyst (CFO/Fe@C) was in situ formed by a simple coprecipitationand calcination process. Fine intergrowth crystal CoFe2O4 and Fe0 were uniformly dispersedon the N-doped porous carbon that derived from the raw material Ethylene Diamine Tetraacetic Acid(EDTA), which also provided chelating effect to prevent the agglomeration of the metals. Interestingly,the Fe0 could only be formed with the presence of cobalt, possibly due to the increased reduction propertyresulted from the particle refinement. The as-formed Fe0 could not only activate the peroxymonosulfate(PMS) but also reduce the Co3+, resulting in a synergistic impact to remarkably enhance thedegradation performance. Besides, the N-doped porous carbon can also benefit the degradation of pollutantby strengthening the electron transfer. A good degradation efficiency of QNC was obtained in CFO/Fe@C-PMS system and most of the QNC had been degraded to carbon dioxide, water and other smallmolecular organisms. The removal rate remained over 70% after four reuses and the material could beeasily recovered from the solution due to the good magnetic properties. Therefore, the as-preparedCFO/Fe@C catalyst should be an ideal catalyst for the removal of organic pollutants.
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