Tailored Self-Supported Co,Ni/MnO2 Nanorods@Hierarchical Carbon Spheres Chains as Advanced Electrocatalysts for Rechargeable Zn-Air battery and Self-Driven Water Splitting DOI Creative Commons
Xiaoying Zheng, Alonso Moreno Zuria, Mohamed Mohamedi

et al.

ACS electrochemistry., Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Designing multifunctional electrocatalysts that combine high efficiency, durability, and affordability for energy storage represents a significant challenge. Here, we introduce novel trifunctional electrocatalyst synthesized by doping self-supported surface electrochemically functionalized carbon sphere chains/MnO2 nanorods with Co or Ni (Func CSCs-2M/Co0.25 (or Ni0.25) MnOx). These demonstrate exceptional electroactivity the oxygen evolution reaction, reduction hydrogen along durability comparable to of commercial Pt/C IrO2 catalysts. Two Zn-air batteries (ZABs) equipped Func CSCs-2M/Co0.25MnOx cathodes, connected in series, have capability power 39 red light-emitting diodes continuously an impressive duration 200 h. Moreover, self-sustaining water splitting system, powered ZABs, is showcased, utilizing as exclusive catalyst. This system sustains consistent voltage up 20 h under applied current density reaching 30 mA cm–2. performance rivals noble catalyst systems, showcasing its competitive edge. The study emphasizes cost-effectiveness materials utilization low-carbon, renewable rechargeable ZAB combined electrolysis. Such integration has potential make substantial impact addressing long-term environmental challenges, easing pressure on these critical fronts.

Language: Английский

Spin Magnetic Effect Activate Dual Site Intramolecular O─O Bridging for Nickel‐Iron Hydroxide Enhanced Oxygen Evolution Catalysis DOI Creative Commons

Haohai Dong,

Lanke Luo,

Shaobing Zhou

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Abstract The oxygen evolution reaction (OER) involves the recombination of diamagnetic hydroxyl (OH) or water (H 2 O) into paramagnetic triplet state (O ). spin conservation intermediates plays a crucial role in OER, however, research on dynamics during catalytic process remains its early stages. Herein, β ‐Ni(OH) and Fe‐doped (Ni 5 Fe 1 ) are utilized as model catalysts to understand mechanism magnetic effects at iron (III) sites OER. Combined with characterization, it is founded that introduction transforms antiferromagnetic Ni(OH) ferromagnetic material. Testing response catalyst under an external field, OER activity Ni significantly enhanced comparison . This improvement likely due sites, which promote enhance kinetics, thereby increasing efficiency. Combining experimental theoretical discovered accelerate formation heterogeneous dual‐site O─O bridging, represented ─Ni─O─O─Fe─, effectively enhancing kinetics reaction. study provides perspective structure‐function relationship iron‐based has significant implications for design new catalysts.

Language: Английский

Citations

0
Electrostatic self-assembly of copper oxide nano catchers boosting the efficiency of oxygen reduction in microbial fuel cell DOI
Cong Li,

Mingxia Zheng,

Xuan Yang

et al.

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 643, P. 237059 - 237059

Published: April 16, 2025

Language: Английский

Citations

0
Tailored Self-Supported Co,Ni/MnO2 Nanorods@Hierarchical Carbon Spheres Chains as Advanced Electrocatalysts for Rechargeable Zn-Air battery and Self-Driven Water Splitting DOI Creative Commons
Xiaoying Zheng, Alonso Moreno Zuria, Mohamed Mohamedi

et al.

ACS electrochemistry., Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Designing multifunctional electrocatalysts that combine high efficiency, durability, and affordability for energy storage represents a significant challenge. Here, we introduce novel trifunctional electrocatalyst synthesized by doping self-supported surface electrochemically functionalized carbon sphere chains/MnO2 nanorods with Co or Ni (Func CSCs-2M/Co0.25 (or Ni0.25) MnOx). These demonstrate exceptional electroactivity the oxygen evolution reaction, reduction hydrogen along durability comparable to of commercial Pt/C IrO2 catalysts. Two Zn-air batteries (ZABs) equipped Func CSCs-2M/Co0.25MnOx cathodes, connected in series, have capability power 39 red light-emitting diodes continuously an impressive duration 200 h. Moreover, self-sustaining water splitting system, powered ZABs, is showcased, utilizing as exclusive catalyst. This system sustains consistent voltage up 20 h under applied current density reaching 30 mA cm–2. performance rivals noble catalyst systems, showcasing its competitive edge. The study emphasizes cost-effectiveness materials utilization low-carbon, renewable rechargeable ZAB combined electrolysis. Such integration has potential make substantial impact addressing long-term environmental challenges, easing pressure on these critical fronts.

Language: Английский

Citations

0