The novel mushroom-like carbon nanotube top-supported FeNi alloy doped P material with ultra-high activity for OER/HER/ORR

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 72, С. 1077 - 1090

Опубликована: Июнь 1, 2024

Язык: Английский

Eggshell‐Like Carbon Microspheres with Curvature Scheme: Distorted Energy Band and Atomic Charge Waves‐Driven High Performance for Zinc–Air Battery

Small, Год журнала: 2024, Номер unknown

Опубликована: Май 16, 2024

Abstract A metal‐free nanocarbon with an eggshell structure is synthesized from chitosan (CS) and natural spherical graphite (NSG) as a cathode electrocatalyst for clean zinc‐air batteries fuel cells. It developed using CS‐derived carbons eggshell, covering NSG cores. The synthesis involves the in situ growth of CS on NSG, followed by ammonia‐assisted pyrolysis carbonization. resulting catalyst displays curved completely coated showing superior oxygen reduction reaction (ORR) performance. In 1 M NaOH, ORR half‐wave potential reached 0.93 V, surpassing commercial Pt/C 50 mV. Furthermore, battery featuring achieves peak power density 167 mW cm ‐2 excellent stability, outperforming Pt/C. improved performance can be attributed to distorted energy band active sites form N‐C moieties. More importantly, thin eggshells induce built‐in electric fields that promote electron redistribution generate atomic charge waves around moieties carbon shells. As result, high positively charged stable C + adjacent N atoms optimize adsorption strength molecules, thereby facilitating

Язык: Английский

Designing a series of RE based carbon composites (RE=Tb, Gd, Ho, Lu, Nd, Sm, Yb, Eu, and Ce)-especially Tb-N-Cs for oxygen reduction enhancement

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 90, С. 1237 - 1242

Опубликована: Окт. 13, 2024

Язык: Английский