12 research outputs found

    Correction: Gait in Mild Alzheimer's Disease: Feasibility of Multi-Center Measurement in the Clinic and Home with Body-Worn Sensors: A Pilot Study (vol 63, pg 331, 2018)

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    Ríona Mc Ardle, Rosie Morrisa, Aodhán Hickey, Silvia Del Din, Ivan Koychev, Roger N. Gunn, Jennifer Lawson, Giovanna Zamboni, Basil Ridha, Barbara J. Sahakian, James B. Rowe, Alan Thomas, Henrik Zetterberg, Clare MacKay, Simon Lovestone and Lynn Rochester, on behalf of the Deep and Frequent Phenotyping study team [Journal of Alzheimer’s Disease 63(1), 2018, 331-341, DOI 10.3233/JAD-171116] https://content.iospress.com/articles/journal-of-alzheimers-disease/jad171116 On page 334, in figure 1(e), the term “micro gait” appears on the left hand side as well as on the right hand side. On the right hand side, however, it should read “macro gait”

    Electrochemical Synthesis of Spinel Type ZnCo<sub>2</sub>O<sub>4</sub> Electrodes for Use as Oxygen Evolution Reaction Catalysts

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    A new electrochemical synthesis route was developed to prepare spinel-type ZnCo<sub>2</sub>O<sub>4</sub> and Co<sub>3</sub>O<sub>4</sub> as high quality thin film-type electrodes for use as electrocatalysts for oxygen evolution reaction (OER). Whereas Co<sub>3</sub>O<sub>4</sub> contains Co<sup>2+</sup> in the tetrahedral sites and Co<sup>3+</sup> in the octahedral sites in the spinel structure, ZnCo<sub>2</sub>O<sub>4</sub> contains only Co<sup>3+</sup> in the octahedral sites; Co<sup>2+</sup> in the tetrahedral sites is replaced by Zn<sup>2+</sup>. Therefore, by comparing the catalytic properties of ZnCo<sub>2</sub>O<sub>4</sub> and Co<sub>3</sub>O<sub>4</sub> electrodes prepared with comparable surface morphologies and thicknesses, it was possible to examine whether Co<sup>2+</sup> in Co<sub>3</sub>O<sub>4</sub> is catalytically active for OER. The electrocatalytic properties of ZnCo<sub>2</sub>O<sub>4</sub> and Co<sub>3</sub>O<sub>4</sub> for OER in both 1 M KOH (pH 13.8) and 0.1 M phosphate buffer (pH 7) solutions were investigated and compared. The results suggest that the Co<sup>2+</sup> in Co<sub>3</sub>O<sub>4</sub> is not catalytically critical for OER and ZnCo<sub>2</sub>O<sub>4</sub> can be a more economical and environmentally benign replacement for Co<sub>3</sub>O<sub>4</sub> as an OER catalyst
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