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Non-metallic electronic regulation in CuCo oxy-/thio-spinel as advanced oxygen evolution electrocatalysts

Science China Chemistry 2021年第1期64卷 101-108页

作者： Huan Yang Shuai Gao Dewei Rao Chaonan Zhang Xuecheng Zhou Shaokang Yang Jingjing Ye Shasha Yang Feili Lai Xiaohong Yan School of Materials Science and Engineering Jiangsu UniversityZhenjicmg 212013China Department of Chemistry KU LeuvenCelestijnenlaan 200FLeuven 3001Belgium

Developing cost-effective and high-performance oxygen evolution reaction(OER)electrocatalysts has become the intense research on pursuing emerging renewable energy conversion,in which exploring and investigating the intrinsic nature of efficient and stable Cu Co spinel catalysts toward OER in alkaline media is highly ***,Cu1–xCo2+xO4oxy-spinel nanoflakes are fabricated by a facile hydrothermal method with the oxidation of ammonia *** the same condition,Cu1–xCo2+xS4thio-spinel nanospheres are formed without *** OER process,the as-obtained Cu1–xCo2+xO4nanoflakes and Cu1–xCo2+xS4nanospheres possess the anodic overpotential of 267 and 297 m V in alkaline media to drive the current density of 10 m A/cm^2,respectively,outperforming the state-of-the-art noble metal catalyst of RuO2.X-ray photoelectron spectroscopy analysis exhibits the higher ratio value of Co(Ⅲ)/Co(Ⅱ)in Cu1–xCo2+xO4than that in Cu1–xCo2+xS4,suggesting that the stronglyelectronegative oxygen efficiently predominates in regulating valence states of Co active sites in spinel ***,density functional theory simulation further reveals that the increased valence state of Co could accelerate the electron exchange between catalysts and oxygen adsorbates during electrocatalysis,thus contributing to the higher OER activity of Cu1–xCo2+*** work provides deep insight regarding the significance of non-metal element(O and S)in Cu Co spinel structure catalysts,as well as presents a promising approach to exploit higher performance and grasp the mechanism of various non-noblemetal spinel catalysts for water oxidation.

关键词： copper-cobalt oxy-spinel thio-spinel oxygen evolution reaction density functional theory

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STRUCTURE AND PROPERTIES OF Cu-Co MULTILAYER FILMS PRODUCED BY ELECTRODEPOSITION

引用

Acta Metallurgica Sinica(English Letters) 1997年第2期10卷 115-119页

作者： Xue, J.Y. Wu, J.X. Yang, D.J. Univ of Science and Technology Beijing Beijing China

Multilayer Cu-Co film has been produced from a single bath by the method of pulse electrodeposition. Its structure and some magnetic properties were analysed by TEM,AES, XRD and VSM. The results indicated that the film was layed structure, consisted of alternating pure copper and copper-cobalt alloy layers. The results have shown the possibility of producing multilayer films with perpendicular magnetic anisotropy byelectrodeposition.

关键词： electrodeposition copper-cobalt multilayer

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