%0 Journal Article %1 chen_designing_2020 %A Chen, Yuqi %A Yang, Minjun %A Cooper, Joshaniel F. K. %A Clarke, Simon J. %A Rasche, Bertold %A Compton, Richard G. %D 2020 %J ChemElectroChem %K %N 14 %P 3160--3167 %R 10.1002/celc.202000851 %T Designing Selective Electrode Materials for Electroanalysis –New Tungsten Bronzes as Selective Potassium Hosts %U https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/celc.202000851 %V 7 %X Abstract Commercially available monoclinic tungsten oxide WO3 (Pearson symbol mP32) is investigated electrochemically for its selectivity and sensitivity towards potassium ion detection. Electroreduction in aqueous potassium chloride solution shows two distinct phases, identified as tungsten bronzes KxWO3 (phase 1: maximum x1 0.1 and phase 2: maximum x2≈0.3). In?situ synchrotron powder X-ray diffraction reveals the concomitant structural changes, and both phases are identified as new, so far unreported, perovskite-derived potassium bronzes (space group P4/nmm and I 3?m, respectively). In cyclic voltammetry, only the first insertion step is found to be reversible. Potentiostatic insertion and the subsequent voltammetric de-insertion show selectivity toward potassium against lithium and sodium in 0.1?M aqueous solutions. The sensitivity towards potassium is analysed in a concentration range between 1?mM and 100?mM. Two linear regions are found for the response, which we relate to two different rate-determining steps, depending on the concentration of potassium in solution.

@article{chen_designing_2020, abstract = {Abstract Commercially available monoclinic tungsten oxide WO3 (Pearson symbol mP32) is investigated electrochemically for its selectivity and sensitivity towards potassium ion detection. Electroreduction in aqueous potassium chloride solution shows two distinct phases, identified as tungsten bronzes KxWO3 (phase 1: maximum x1 0.1 and phase 2: maximum x2≈0.3). In?situ synchrotron powder X-ray diffraction reveals the concomitant structural changes, and both phases are identified as new, so far unreported, perovskite-derived potassium bronzes (space group P4/nmm and I 3?m, respectively). In cyclic voltammetry, only the first insertion step is found to be reversible. Potentiostatic insertion and the subsequent voltammetric de-insertion show selectivity toward potassium against lithium and sodium in 0.1?M aqueous solutions. The sensitivity towards potassium is analysed in a concentration range between 1?mM and 100?mM. Two linear regions are found for the response, which we relate to two different rate-determining steps, depending on the concentration of potassium in solution.}, added-at = {2024-03-25T12:50:48.000+0100}, author = {Chen, Yuqi and Yang, Minjun and Cooper, Joshaniel F. K. and Clarke, Simon J. and Rasche, Bertold and Compton, Richard G.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2c83ebfbb79ad41760b5a713978feaa10/brasche}, doi = {10.1002/celc.202000851}, file = {celc202000851-sup-0001-misc_information.pdf:files/5465/celc202000851-sup-0001-misc_information.pdf:application/pdf;Chen et al_2020_Designing Selective Electrode Materials for Electroanalysis –New Tungsten.pdf:files/5070/Chen et al_2020_Designing Selective Electrode Materials for Electroanalysis –New Tungsten.pdf:application/pdf;Snapshot:files/5069/celc.html:text/html}, interhash = {bc5f560c2224a28b045e16ee8963d44a}, intrahash = {c83ebfbb79ad41760b5a713978feaa10}, issn = {2196-0216}, journal = {ChemElectroChem}, keywords = {}, month = {07}, number = 14, pages = {3160--3167}, timestamp = {2024-03-25T11:50:48.000+0100}, title = {Designing {Selective} {Electrode} {Materials} for {Electroanalysis} –{New} {Tungsten} {Bronzes} as {Selective} {Potassium} {Hosts}}, url = {https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/celc.202000851}, urldate = {2020-07-31}, volume = 7, year = 2020 }