[{"doi":"10.1002/cssc.202202015","article_number":"e202202015","main_file_link":[{"open_access":"1"}],"language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2025-12-03T16:28:26Z","article_type":"original","intvolume":"        16","year":"2023","title":"Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted pH‐Controlled Co‐Precipitation","author":[{"first_name":"Anna","last_name":"Rabe","full_name":"Rabe, Anna"},{"full_name":"Jaugstetter, Maximilian","last_name":"Jaugstetter","first_name":"Maximilian"},{"full_name":"Hiege, Felix","last_name":"Hiege","first_name":"Felix"},{"first_name":"Nicolas","last_name":"Cosanne","full_name":"Cosanne, Nicolas"},{"last_name":"Ortega","first_name":"Klaus Friedel","full_name":"Ortega, Klaus Friedel"},{"full_name":"Linnemann, Julia","orcid":"0000-0001-6883-5424","last_name":"Linnemann","first_name":"Julia","id":"116779"},{"last_name":"Tschulik","first_name":"Kristina","full_name":"Tschulik, Kristina"},{"full_name":"Behrens, Malte","last_name":"Behrens","first_name":"Malte"}],"publication_identifier":{"issn":["1864-5631","1864-564X"]},"type":"journal_article","keyword":["electrocatalysis","oxygen evolution reaction","cobalt spinel","cobalt hydroxide","LDH"],"department":[{"_id":"985"}],"date_created":"2025-12-03T15:51:54Z","extern":"1","abstract":[{"lang":"eng","text":"Cobalt iron containing layered double hydroxides (LDHs) and spinels are promising catalysts for the electrochemical oxygen evolution reaction (OER). Towards development of better performing catalysts, the precise tuning of mesostructural features such as pore size is desirable, but often hard to achieve. Herein, a computer‐controlled microemulsion‐assisted co‐precipitation (MACP) method at constant pH is established and compared to conventional co‐precipitation. With MACP, the particle growth is limited and through variation of the constant pH during synthesis the pore size of the as‐prepared catalysts is controlled, generating materials for the systematic investigation of confinement effects during OER. At a threshold pore size, overpotential increased significantly. Electrochemical impedance spectroscopy (EIS) indicated a change in OER mechanism, involving the oxygen release step. It is assumed that in smaller pores the critical radius for gas bubble formation is not met and therefore a smaller charge‐transfer resistance is observed for medium frequencies."}],"issue":"10","publication":"ChemSusChem","user_id":"116779","volume":16,"publisher":"Wiley","_id":"62810","status":"public","oa":"1","quality_controlled":"1","citation":{"chicago":"Rabe, Anna, Maximilian Jaugstetter, Felix Hiege, Nicolas Cosanne, Klaus Friedel Ortega, Julia Linnemann, Kristina Tschulik, and Malte Behrens. “Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted PH‐Controlled Co‐Precipitation.” <i>ChemSusChem</i> 16, no. 10 (2023). <a href=\"https://doi.org/10.1002/cssc.202202015\">https://doi.org/10.1002/cssc.202202015</a>.","short":"A. Rabe, M. Jaugstetter, F. Hiege, N. Cosanne, K.F. Ortega, J. Linnemann, K. Tschulik, M. Behrens, ChemSusChem 16 (2023).","apa":"Rabe, A., Jaugstetter, M., Hiege, F., Cosanne, N., Ortega, K. F., Linnemann, J., Tschulik, K., &#38; Behrens, M. (2023). Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted pH‐Controlled Co‐Precipitation. <i>ChemSusChem</i>, <i>16</i>(10), Article e202202015. <a href=\"https://doi.org/10.1002/cssc.202202015\">https://doi.org/10.1002/cssc.202202015</a>","ieee":"A. Rabe <i>et al.</i>, “Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted pH‐Controlled Co‐Precipitation,” <i>ChemSusChem</i>, vol. 16, no. 10, Art. no. e202202015, 2023, doi: <a href=\"https://doi.org/10.1002/cssc.202202015\">10.1002/cssc.202202015</a>.","ama":"Rabe A, Jaugstetter M, Hiege F, et al. Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted pH‐Controlled Co‐Precipitation. <i>ChemSusChem</i>. 2023;16(10). doi:<a href=\"https://doi.org/10.1002/cssc.202202015\">10.1002/cssc.202202015</a>","bibtex":"@article{Rabe_Jaugstetter_Hiege_Cosanne_Ortega_Linnemann_Tschulik_Behrens_2023, title={Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted pH‐Controlled Co‐Precipitation}, volume={16}, DOI={<a href=\"https://doi.org/10.1002/cssc.202202015\">10.1002/cssc.202202015</a>}, number={10e202202015}, journal={ChemSusChem}, publisher={Wiley}, author={Rabe, Anna and Jaugstetter, Maximilian and Hiege, Felix and Cosanne, Nicolas and Ortega, Klaus Friedel and Linnemann, Julia and Tschulik, Kristina and Behrens, Malte}, year={2023} }","mla":"Rabe, Anna, et al. “Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted PH‐Controlled Co‐Precipitation.” <i>ChemSusChem</i>, vol. 16, no. 10, e202202015, Wiley, 2023, doi:<a href=\"https://doi.org/10.1002/cssc.202202015\">10.1002/cssc.202202015</a>."}},{"citation":{"ama":"Fedorov FS, Linnemann J, Tschulik K, Giebeler L, Uhlemann M, Gebert A. Capacitance performance of cobalt hydroxide-based capacitors with utilization of near-neutral electrolytes. <i>Electrochimica Acta</i>. 2012;90:166-170. doi:<a href=\"https://doi.org/10.1016/j.electacta.2012.11.123\">10.1016/j.electacta.2012.11.123</a>","bibtex":"@article{Fedorov_Linnemann_Tschulik_Giebeler_Uhlemann_Gebert_2012, title={Capacitance performance of cobalt hydroxide-based capacitors with utilization of near-neutral electrolytes}, volume={90}, DOI={<a href=\"https://doi.org/10.1016/j.electacta.2012.11.123\">10.1016/j.electacta.2012.11.123</a>}, journal={Electrochimica Acta}, publisher={Elsevier BV}, author={Fedorov, Fedor S. and Linnemann, Julia and Tschulik, Kristina and Giebeler, Lars and Uhlemann, Margitta and Gebert, Annett}, year={2012}, pages={166–170} }","mla":"Fedorov, Fedor S., et al. “Capacitance Performance of Cobalt Hydroxide-Based Capacitors with Utilization of near-Neutral Electrolytes.” <i>Electrochimica Acta</i>, vol. 90, Elsevier BV, 2012, pp. 166–70, doi:<a href=\"https://doi.org/10.1016/j.electacta.2012.11.123\">10.1016/j.electacta.2012.11.123</a>.","chicago":"Fedorov, Fedor S., Julia Linnemann, Kristina Tschulik, Lars Giebeler, Margitta Uhlemann, and Annett Gebert. “Capacitance Performance of Cobalt Hydroxide-Based Capacitors with Utilization of near-Neutral Electrolytes.” <i>Electrochimica Acta</i> 90 (2012): 166–70. <a href=\"https://doi.org/10.1016/j.electacta.2012.11.123\">https://doi.org/10.1016/j.electacta.2012.11.123</a>.","short":"F.S. Fedorov, J. Linnemann, K. Tschulik, L. Giebeler, M. Uhlemann, A. Gebert, Electrochimica Acta 90 (2012) 166–170.","apa":"Fedorov, F. S., Linnemann, J., Tschulik, K., Giebeler, L., Uhlemann, M., &#38; Gebert, A. (2012). Capacitance performance of cobalt hydroxide-based capacitors with utilization of near-neutral electrolytes. <i>Electrochimica Acta</i>, <i>90</i>, 166–170. <a href=\"https://doi.org/10.1016/j.electacta.2012.11.123\">https://doi.org/10.1016/j.electacta.2012.11.123</a>","ieee":"F. S. Fedorov, J. Linnemann, K. Tschulik, L. Giebeler, M. Uhlemann, and A. Gebert, “Capacitance performance of cobalt hydroxide-based capacitors with utilization of near-neutral electrolytes,” <i>Electrochimica Acta</i>, vol. 90, pp. 166–170, 2012, doi: <a href=\"https://doi.org/10.1016/j.electacta.2012.11.123\">10.1016/j.electacta.2012.11.123</a>."},"quality_controlled":"1","status":"public","page":"166-170","_id":"62808","publisher":"Elsevier BV","user_id":"116779","volume":90,"publication":"Electrochimica Acta","extern":"1","abstract":[{"lang":"eng","text":"Conventional alkaline solutions used for capacitive performance of electrodeposited cobalt hydroxides have a number of disadvantages as they are corrosive, environmentally unfriendly and provide a small working potential range. In this study, the capacitive properties of electrodeposited cobalt hydroxide/oxide were investigated in 1 M Na2SO4 solution with pH 5.5 by means of cyclic voltammetry, galvanostatic charging/discharging experiments and electrochemical impedance spectroscopy. The capacitance of the cobalt hydroxide/oxide was demonstrated to have high values of 141 F g−1 at scan rate 8 mV s−1 in this 1 M Na2SO4 solution. The anodic potential range is extended by 0.8–1.3 V vs. Ag/AgCl. A good cyclic stability and reversibility were observed."}],"date_created":"2025-12-03T15:47:09Z","keyword":["electrodeposition","cobalt hydroxide","supercapacitors"],"type":"journal_article","department":[{"_id":"985"}],"year":"2012","title":"Capacitance performance of cobalt hydroxide-based capacitors with utilization of near-neutral electrolytes","author":[{"first_name":"Fedor S.","last_name":"Fedorov","full_name":"Fedorov, Fedor S."},{"id":"116779","full_name":"Linnemann, Julia","last_name":"Linnemann","orcid":"0000-0001-6883-5424","first_name":"Julia"},{"full_name":"Tschulik, Kristina","last_name":"Tschulik","first_name":"Kristina"},{"full_name":"Giebeler, Lars","first_name":"Lars","last_name":"Giebeler"},{"full_name":"Uhlemann, Margitta","first_name":"Margitta","last_name":"Uhlemann"},{"full_name":"Gebert, Annett","last_name":"Gebert","first_name":"Annett"}],"publication_identifier":{"issn":["0013-4686"]},"publication_status":"published","date_updated":"2025-12-03T16:35:20Z","article_type":"original","intvolume":"        90","language":[{"iso":"eng"}],"doi":"10.1016/j.electacta.2012.11.123"}]