Structure–Activity Relationships in Oxygen Electrocatalysis

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Abstract Oxygen electrocatalysis, as the pivotal circle of many green energy technologies, sets off a worldwide research boom in full swing, while its large kinetic obstacles require remarkable catalysts to break through. Here, based on summarizing reaction mechanisms and situ characterizations, structure–activity relationships oxygen electrocatalysts are emphatically overviewed, including influence geometric morphology chemical structures electrocatalytic performances. Subsequently, experimental/theoretical is combined with device applications comprehensively summarize cutting‐edge according various material categories. Finally, future challenges forecasted from perspective catalyst development applications, favoring researchers promote industrialization electrocatalysis at an early date.

Language: Английский

---

Utilizing Molybdenum to Tailor the Electronic Structure of Iron Through Electron Complementary Effect for Promoting Oxygen Reduction Activity

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 16, 2025

Abstract Tailoring the electronic structure of later transition metal‐based electrocatalysts by incorporating early metal based on complementary effect is anticipated to enhance electrocatalytic activity. Herein, modulation Fe 3 C through utilization Mo 2 promote oxygen reduction reaction (ORR) activity reported. In situ characterizations combined with theoretical calculations reveal that electron‐donating capability molybdenum in active center iron optimizes adsorption and activation oxygen. Concurrently, d‐band much closer Fermi level, which reduces energy barrier for rate‐determining step ( * OOH → O), thereby enhancing ORR alkaline media, catalyst delivers a half‐wave potential E 1/2 ) 0.89 V maintains its efficiency mere 8 mV decay after 10 000 cycles, surpassing Pt/C. Moreover, it can serve as an air cathode both liquid‐state all‐solid‐state zinc‐air batteries (ZABs) shows promising applications portable devices. This work brings innovative design concept highly efficient suitable advanced

Language: Английский

---

Progress and Perspectives in the Electrochemical Synthesis of Carbon Nanomaterials

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120151 - 120151

Published: Feb. 1, 2025

Language: Английский

---

Optimizing Sodium Ion Adsorption Through Robust d–d Orbital Modulation for Efficient Capacitive Deionization

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Abstract Unraveling the fundamental mechanisms of sodium ion adsorption behavior is crucial for guiding design electrode materials and enhancing performance capacitive deionization systems. Herein, optimization systematically investigated through robust d–d orbital interactions within zinc‐doped iron carbide, facilitated by a novel liquid nitrogen quenching treatment. Liquid treatment can enhance coordination number, strengthen interactions, promote electron transfer, shift d‐band center Fe closer to Fermi level, thereby ions energy. Consequently, obtained material achieves superior gravimetric capacity 121.1 mg g −1 attractive cyclic durability. The highly competitive compared vast majority related research works in field deionization. Furthermore, adsorption/desorption are substantiated ex situ techniques, revealing dynamic atomic electronic structure evolutions under operational conditions. This work demonstrates that optimizing via modulation enabled an effective approach developing efficient materials.

Language: Английский

---

Iron‐Nitrogen‐Carbon Aerogel for Enhanced Oxygen Reduction in Acidic Media: The Influence of Temperature

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Abstract The oxygen reduction reaction (ORR) in an acidic environment is crucial for fuel cell technology. Understanding its complex kinetics and developing advanced catalyst materials have the potential to drive significant improvements energy efficiency, paving way sustainable, green solutions. In this work, Iron‐Nitrogen‐Carbon@aerogel (Fe(FcP) x ‐N‐C@Aerogel) catalysts are developed by carbonizing polypyrrole (PPy) ferrocene. ORR performance of these investigated across different annealing temperatures. catalysts’ shape structure validated through scanning electron microscopy (SEM) X‐ray photoelectron spectroscopy (XPS), revealing that changes temperature affect morphology nitrogen‐containing functional groups catalyst. Linear sweep voltammetry (LSV) rotating disk electrode (RDE) studies demonstrated Fe(FcP) 800 ‐N‐C@Aerogel exhibit excellent performance, with a half‐wave 0.687 V average transfer number 3.98 under conditions. These findings suggest near‐four‐electron pathway, highlighting catalyst's strong activity, high durability, only 17.4 mV LSV curve decay after 10,000 cycles. conclusion, advances catalysis media delivering exceptional driven innovative architecture precisely engineered active sites, setting new benchmark high‐efficiency conversion.

Language: Английский

---

Ni₄Mo nanoparticles embedded in N-doped carbon nanotubes growing on Ni₄Mo/MoO₂ micropillars for durable hydrogen evolution

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

N-doped carbon nanotubes embedding Ni4Mo particles at the tips growing on Ni4Mo/MoO2 micropillars were achieved as a highly efficient HER electrocatalyst. This well-designed NCNTs@Ni4Mo/MoO2 heterostructure catalyst exhibits excellent durability and high activity toward hydrogen evolution reaction.

Language: Английский

---

Co-Fe3C nanoparticles encapsulated in N-doped carbon matrix carbon as bifunctional electrocatalyst for oxygen reaction and reversible zinc-air batteries

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179961 - 179961

Published: March 1, 2025

Language: Английский

---

Superhydrophobic electrocatalyst embedding abundant alloy/metal carbide core–shell heterogeneous nanoparticles for high power density Zn-air battery

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162669 - 162669

Published: April 1, 2025

Language: Английский

---

One Heterogeneous Catalyst Drives Two Selective Fenton-like Reaction Modes for Sustainable Water Decontamination

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Heterogeneous Fenton-like reactions based on nonradical reactive oxygen species (ROS) are desirable for selective water decontamination, and different pollutants coexisting in real scenarios necessitate a rational combination of multiple ROS efficient sustainable decontamination. However, the general one-catalyst-for-one-ROS strategy toward generation inevitably renders combinational process lengthy cost ineffective. Herein, we developed new approach to enable separate but two distinct one catalyst via peroxymonosulfate activation. The unique is comprised graphitic layer bottom-wrapped Fe@Fe3C encapsulated inside nitrogen-doped carbon nanotubes. Fe3C shell facilitates formation surface-bound FeIV═O with up 96.0% selectivity, applied electric field could switch free 1O2 90.5% as enabled by C atoms adjacent graphite N. One dual-site enables both high cumulative concentration 16605 7674 μM at 30 min, respectively. Based such simple electricity on/off mode, tandem operated unit was proposed efficiently degrade mixed adsorption properties. This study presents very effective modulate that simplifies systems

Language: Английский

---

Yolk-shell structured ultra-small Fe3C nanoparticles encapsulated in S, N-codoped porous carbon as effective catalysts for the oxygen reduction reaction in microbial fuel cells

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 644, P. 237058 - 237058

Published: April 18, 2025

Language: Английский

---