Azimzadeh Sani Mahnaz, Pavlopoulos Nicholas G, Pezzotti Simone, Serva Alessandra, Cignoni Paolo, Linnemann Julia, Salanne Mathieu, Gaigeot Marie-Pierre, Tschulik Kristina
Analytical Chemistry II Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801, Bochum, Germany.
Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, 32000, Haifa, Israel.
Angew Chem Int Ed Engl. 2022 Jan 26;61(5):e202112679. doi: 10.1002/anie.202112679. Epub 2021 Dec 17.
The electrical double-layer plays a key role in important interfacial electrochemical processes from catalysis to energy storage and corrosion. Therefore, understanding its structure is crucial for the progress of sustainable technologies. We extract new physico-chemical information on the capacitance and structure of the electrical double-layer of platinum and gold nanoparticles at the molecular level, employing single nanoparticle electrochemistry. The charge storage ability of the solid/liquid interface is larger by one order-of-magnitude than predicted by the traditional mean-field models of the double-layer such as the Gouy-Chapman-Stern model. Performing molecular dynamics simulations, we investigate the possible relationship between the measured high capacitance and adsorption strength of the water adlayer formed at the metal surface. These insights may launch the active tuning of solid-solvent and solvent-solvent interactions as an innovative design strategy to transform energy technologies towards superior performance and sustainability.
从催化到能量存储以及腐蚀等重要的界面电化学过程中，双电层起着关键作用。因此，了解其结构对于可持续技术的发展至关重要。我们采用单纳米粒子电化学方法，在分子水平上提取了有关铂和金纳米粒子双电层电容和结构的新物理化学信息。固/液界面的电荷存储能力比双层的传统平均场模型（如 Gouy-Chapman-Stern 模型）预测的大一个数量级。通过进行分子动力学模拟，我们研究了在金属表面形成的水吸附层的测量高电容与吸附强度之间的可能关系。这些见解可能会引发对固-溶剂和溶剂-溶剂相互作用的主动调控，作为一种创新的设计策略，推动能源技术向卓越性能和可持续性转变。
