Biochar aerogel-based electrocatalyst towards efficient oxygen evolution in acidic media

Abstract The controllable synthesis of oxygen evolution reaction (OER) electrocatalyst is an urgent need to advance the development sustainable energy conversion and storage. However, OER efficiency in acidic media seriously hindered by slow kinetics. traditional electrocatalysts are more prone be oxidized corroded as results unstable carrier structures variable electronic states active species. Herein, a high-performing biochar aerogel (BA) based were realistically designed synthetized via joint utilization terrestrial lignin seaweed polysaccharide carbon sources. Originating from induction effect "egg-box" structure alginate self-template lignosulfonate, BA decorated with Ru/RuS 2 particles was synthesized triumphantly. as-synthesized required low overpotential 228 mV attain 10 mA cm −2 0.5 M H SO 4 exhibited good stability for over 12,000 s. activity strongly dependent on assembled unique two-dimensional/three-dimensional (2D/3D) channels aerogels. Notably, numerous defective sites at could interact heterojunction remarkably enhancing catalytic whole system media. This work puts forward novel effective strategy towards enhancement process rational regulations coupling micro-interface. Graphical