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A Wieckowski

Publications and source records attributed to A Wieckowski.

5 recordsLinked to original sources
PubMed2002

Diffusion on a nanoparticle surface as revealed by electrochemical NMR.

Surface diffusion of chemisorbed CO (from MeOH electrochemisorption) on pure and Ru-modified nanoscale Pt electrocatalyst surfaces has been investigated by solid-state electrochemical NMR (EC-NMR) in the presence of supporting electrolyte. Temperature-dependent nuclear spin-spin and spin-lattice relaxation measurements enable the diffusion activation energy, E, to be deduced. It is shown that the activation energy E correlates with the steady state current for MeOH electro-oxidation. A simple two-dimensional collision theory model is proposed to explain this intriguing observation, which may provide new mechanistic insights into the promotion of CO-tolerance in Pt/Ru fuel cell catalysts.

Journal Article↗
PubMed1995

Progressive interstitial lung disease in a 75 year old woman.

The case of a 75 year old woman with rapidly progressive interstitial lung disease is presented. Bronchoalveolar lavage (BAL) was consistent with CD8+ cell alveolitis, and computerized tomography revealed features of bronchiolitis obliterans organizing pneumonia (BOOP). The patient had been on clomipramine (a tricyclic antidepressant) for 9 months prior to the onset of disease. Cessation of the drug and very short-term oral corticosteroid treatment (prematurely terminated by the patient) resulted in complete resolution of clinical symptoms, morphological and physiological findings, which remained stable without treatment over the following year. A possible drug reaction to clomipramine presenting as BOOP is discussed.

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