![]() The third group (Rh and Ir) is the case where the intermediate Tafel slope corresponds to intermediate dissolution rates and oxygen generated partially from. When PtCo–RuO 2/C was applied to a proton-exchange membrane water electrolyzer, it showed a single-cell performance of 3.7 A mg Ru+Pt −1 at 2.0 V, which greatly outperforms that of commercial IrO 2. The opposite to these should be oxides with low Tafel slope (Ru and Au) having high dissolution rate and significant participance of lattice oxygen in the generation of the oxygen molecule. Microscopic and spectroscopic analyses and density functional theory calculation of the nanocatalysts before and after OER cycles were conducted to scrutinize the role of Pt dopants for the observed durability and activity, revealing that Pt dopants promote *OOH adsorption and deprotonation, thereby limiting Ru overoxidation during OER cycles. ![]() The resulting nanorod-shaped PtCo–RuO 2/C showed 212.6 ± 5.3 mV overpotential at 10 mA cm −2 in a half-cell test and exhibited mass activity and long-term stability that greatly surpass those of Pt–RuO 2/C and commercial Ir/C. Herein, we developed a method to mix Pt atoms with the RuO 2 matrix in a controlled manner by exploiting the oxophilicity of certain first-row transition metals in pulling out the Pt atoms in Pt-based under oxidative conditions. The hydrogen electrocatalysis performances of Pt and Ru-modified Pt electrodes in an H 2-saturated 0.1 M NaOH solution were recorded and are summarized in Fig. c) the energy required to produce one mole of an ionic compound from its constituent elements in their standard states. ![]() b) the energy given off when gaseous ions combine to form one mole of an ionic solid. Therefore, it is crucial to steer the electrochemical oxygen evolution towards the adsorbate evolution mechanism (AEM) for improved durability of the RuO 2 phase in acidic electrolytes. a) the energy required to convert a mole of ionic solid into its constituent ions in the gas phase. Defective RuO 2 possesses excellent initial activity toward the oxygen evolution reaction in acidic water electrooxidation due to the involvement of lattice oxygens, which, however, is the very reason for the accelerated dissolution of Ru species. energy (U), 4, 8, 55, 63, 74, 75, 111, 206, 210, 214, 221, 304305, 408.
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