Nanostructured RuO₂–Co₃O₄@RuCo-EO with low Ru loading as a high-efficiency electrochemical oxygen evolution catalyst

Abstract

The optimized RuO2/Co3O4–RuCo-EO electrode with Ru loading of 0.064 mg cm−2 exhibits the excellent oxygen evolution activity with an overpotential of 220 mV at the current density of 10 mA cm−2 and a Tafel slope of 59.9 mV dec−1.

The controllable synthesis of NiO/Ni/C nanosheets via pulsed plasma in ethylene glycol solution for oxygen evolution electrocatalysis

“…Fig. 8f summarizes the performance of the EG30 prepared in this study compared to the NiO/Ni/C 8–10,38–44 and noble metal 45,46 previously reported in literature. Herein, we mainly compare overpotentials and Tafel slopes.…”

Review of Mott–Schottky-Based Nanoscale Catalysts for Electrochemical Water Splitting

“…The optimized RuO 2 /Co 3 O 4 −RuCo/EO electrode ensured good electrocatalytic activity. 185 Also, Sarkar et al have created a pH universal HER catalyst via the pyrolysis technique to produce a Ru-adorned hollow N-doped carbon matrix (Ru@ NCN). Due to the M−S effect, the electrons transferred from the metal/semiconductor (Ru/NCN) heterojunction exhibited overpotentials of 36, 49, and 76 mV with a current density of 10 mA cm −2 in alkaline, acidic, and neutral environments, respectively.…”

“…The M–S effect, a charge transfer process, can be beneficially utilized by the combined electrocatalysts of metal and semiconductor with a low η10 of 220 mV and a Tafel slope of 59.9 mV dec –1 for OER at a current density of 10 mA cm –2 . The optimized RuO 2 /Co 3 O 4 –RuCo/EO electrode ensured good electrocatalytic activity . Also, Sarkar et al have created a pH universal HER catalyst via the pyrolysis technique to produce a Ru-adorned hollow N-doped carbon matrix (Ru@NCN).…”

Mn-doped Co3O4 for acid, neutral and alkaline electrocatalytic oxygen evolution reaction

“…12 Cobalt oxides (CoO x ) present high catalytic activity for OER in alkaline solution, especially the Co 3 O 4 spinel that has been widely investigated as an attractive anode material with high activity, corrosion resistance in alkaline electrolytes, excellent redox property originating from its Co 2+ /Co 3+ mixed valence nature. 1,3,5,6,[13][14][15] Furthermore, the development of acid-stable OER electrocatalysts is still a challenge. 5 The electrolyte pH has a signicant impact on the choice of the electrocatalyst, for instance, for the application of proton exchange membrane (PEM) electrolyzer for hydrogen production at acid pH, active and resistant catalysts are necessary.…”

“…The development of efficient technologies for the conversion and storage of energy using renewable sources has been intensified, especially those related to the use of solar energy. 1 However, some factors hamper the implementation of a solar-based generation system, such as the intermittence of sunlight and the high cost of silicon cells. These barriers make even more urgent the search for new materials to play the different functions in an artificial leaf device, such as light-harvesting, electron conduction, and hydrogen/oxygen catalytic generation from the water splitting reaction.…”