Nanoengineering of Porous 2D Structures with Tunable Fluid Transport Behavior for Exceptional H2O2 Electrosynthesis DOI
Qiang Tian, Lingyan Jing,

Yunchao Yin

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(5), P. 1650 - 1659

Published: Jan. 24, 2024

Precision nanoengineering of porous two-dimensional structures has emerged as a promising avenue for finely tuning catalytic reactions. However, understanding the pore-structure-dependent performance remains challenging, given lack comprehensive guidelines, appropriate material models, and precise synthesis strategies. Here, we propose optimization carbon materials through utilization mesopores with 5–10 nm diameter to facilitate fluid acceleration, guided by finite element simulations. As proof concept, optimized mesoporous nanosheet sample exhibited exceptional electrocatalytic performance, demonstrating high selectivity (>95%) notable diffusion-limiting disk current density −3.1 mA cm–2 H2O2 production. Impressively, electrolysis process in flow cell achieved production rate 14.39 mol gcatalyst–1 h–1 yield medical-grade disinfectant-worthy solution. Our pore engineering research focuses on modulating oxygen reduction reaction activity affecting local transport behavior, providing insights into mesoscale mechanism.

Language: Английский

Synthetic porous carbons for clean energy storage and conversion DOI
Xiaoling Dong,

Lu Hou,

Hu Xu

et al.

EnergyChem, Journal Year: 2023, Volume and Issue: 5(4), P. 100099 - 100099

Published: Jan. 13, 2023

Language: Английский

Citations

26
Porous Iron‐Nitrogen‐Carbon Electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC) DOI Creative Commons
Beatrice Ricciardi, Barbara Mecheri, Williane da Silva Freitas

et al.

ChemElectroChem, Journal Year: 2023, Volume and Issue: 10(7)

Published: March 3, 2023

Abstract High‐performance platinum group metal‐free (PGM‐free) electrocatalysts were prepared from porous organic polymers (POPs) precursors with highly‐porous structures and adjustable surface area. A resin phenol‐melamine‐based POP an iron salt used to synthesize Fe−N−C catalysts different contents (0.2–1.3 wt.%). Electrochemical spectroscopical characterization allowed us elucidate the effect of Fe content on material's structure, chemistry, electrocatalytic activity toward oxygen reduction reaction (ORR). The increase led a specific area decrease, preserving morphological formation highly‐active catalytic sites, as indicated by X‐ray photoelectron spectroscopy (XPS) analysis. rotating ring disk electrode experiments, performed at pH=13, confirmed high ORR both 0.5 ( E 1/2 =0.84 V) 1.3 =0.83 catalysts, which assembled cathode H 2 ‐fed anion exchange membrane fuel cells (AEMFC) equipped FAA‐3‐50 membrane, evidencing promising performance (0.5 Fe, maximum power density, Max PD=69 mA cm −2 PD=87 ) further advancement prospects.

Language: Английский

Citations

25
Rational regulation of the electronic structure of Cu1 sites catalyst to modulate persulphate activation pathway DOI
Xiao Ge, Dongqin Zhou, Jie Wang

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148587 - 148587

Published: Jan. 7, 2024

Language: Английский

Citations

13
Coordination Engineering of N, O Co‐Doped Cu Single Atom on Porous Carbon for High Performance Zinc Metal Anodes DOI
Kyungbin Lee, Eun Ji Kim, Jaekyum Kim

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(13)

Published: Jan. 2, 2024

Abstract Traditional challenges of poor cycling stability and low Coulombic efficiency in Zinc (Zn) metal anodes have limited their practical application. To overcome these issues, this work introduces a single metal‐atom design featuring atomically dispersed copper (Cu) atoms on 3D nitrogen (N) oxygen (O) co‐doped porous carbon (CuNOC) as highly reversible Zn host. The CuNOC structure provides active sites for initial nucleation further promotes uniform deposition. architecture mitigates the volume changes during cycle with homogeneous 2+ flux. Consequently, demonstrates exceptional reversibility plating/stripping processes over 1000 cycles at 2 5 mA cm −2 fixed capacity 1 mAh , while achieving stable operation voltage hysteresis 700 h . Furthermore, density functional theory calculations show that co‐doping N O Cu creates an efficient zincophilic site nucleation. A full cell host anode high loading V cathode exhibits outstanding rate‐capability up to g −1 life 400 0.5

Language: Английский

Citations

11
Nanoengineering of Porous 2D Structures with Tunable Fluid Transport Behavior for Exceptional H2O2 Electrosynthesis DOI
Qiang Tian, Lingyan Jing,

Yunchao Yin

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(5), P. 1650 - 1659

Published: Jan. 24, 2024

Precision nanoengineering of porous two-dimensional structures has emerged as a promising avenue for finely tuning catalytic reactions. However, understanding the pore-structure-dependent performance remains challenging, given lack comprehensive guidelines, appropriate material models, and precise synthesis strategies. Here, we propose optimization carbon materials through utilization mesopores with 5–10 nm diameter to facilitate fluid acceleration, guided by finite element simulations. As proof concept, optimized mesoporous nanosheet sample exhibited exceptional electrocatalytic performance, demonstrating high selectivity (>95%) notable diffusion-limiting disk current density −3.1 mA cm–2 H2O2 production. Impressively, electrolysis process in flow cell achieved production rate 14.39 mol gcatalyst–1 h–1 yield medical-grade disinfectant-worthy solution. Our pore engineering research focuses on modulating oxygen reduction reaction activity affecting local transport behavior, providing insights into mesoscale mechanism.

Language: Английский

Citations

9