2026-04-17T03:02:36Zhttps://recercat.cat/oai/request
oai:recercat.cat:2072/5277032024-12-20T22:45:48Zcom_2072_300912com_2072_4427col_2072_301309
RECERCAT author Hegner, Franziska S. author Garcés-Pineda, Felipe A. author González-Cobos, Jesús author Rodríguez-García, Barbara author Torréns, Mabel author Palomares, Emilio author López, Núria author Galán-Mascarós, José-Ramón 2022-12-07T12:01:58Z2024-04-23T10:59:56Z 2022-12-07T12:01:58Z2024-04-23T10:59:56Z 2021-10-14 http://hdl.handle.net/2072/527703 https://doi.org/10.1021/acscatal.1c03502 Hydrogen is a most desirable solar energy storage medium. It provides reliable, scalable, and long-term energy storage, while helping in the decarbonization of the energy cycle. Such a storage medium is required for further deployment of photovoltaics, either for their inclusion into transportation and heavy industries or for supporting renewable grid management. The most accessible hydrogen source is water. However, fresh water is a scarce resource, while seawater is abundant worldwide. A major drawback of seawater electrolysis comes from chloride oxidation competing with the oxygen evolution reaction (OER). This may produce toxic products such as chlorine and also limits the hydrogen energy efficiency of the overall process. Thus, selective catalysts toward the OER are of strong technological interest. Here we report the electrocatalytic activity of heterogeneous cobalt hexacyanoferrate toward seawater oxidation. Combining experimental and computational studies, we highlight the great difficulty in obtaining such selectivity and its main mechanistic descriptors. This Prussian blue derivative is an excellent and robust OER electrocatalyst, but unfortunately, it is not selective enough toward the OER in the presence of Cl– anions. Faradaic efficiencies above 30% toward Cl2 were observed during untreated seawater bulk electrolysis. eng Attribution-NonCommercial-NoDerivatives 4.0 International License.This license is permanently located athttp://creativecommons.org/licenses/by-nc-nd/4.0/. Understanding the Catalytic Selectivity of Cobalt Hexacyanoferrate Towards Oxygen Evolution in Seawater Electrolysis info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion URL https://recercat.cat/bitstream/2072/527703/1/ACS%20Catalysis_2021_11_13140.pdf File MD5 88b3adbb1baf6b7fc6c78c1aa3790d8a 801238 application/pdf ACS Catalysis_2021_11_13140.pdf URL https://recercat.cat/bitstream/2072/527703/2/ACS%20Catalysis_2021_11_13140.pdf.txt File MD5 17e629e50c4ca47168e371354a109d89 50440 text/plain ACS Catalysis_2021_11_13140.pdf.txt