Phase Reconstruction‐Directed Synthesis of Oxalate‐Functionalized Nickel Hydroxide Electrocatalyst for High‐Yield H2O2 Generation at Industrial Currents DOI Creative Commons
Zhiwei Liu,

Weijie Yuan,

Hongyuan Yang

et al.

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

Published: Oct. 22, 2024

Abstract The electrochemical oxygen reduction reaction (2e − ORR) offers a promising approach for H 2 O production, yet developing highly active, selective, and stable electrocatalysts remains challenge. In this work, phase reconstruction strategy is presented to synthesize an oxalate‐adsorbed nickel hydroxide electrocatalyst (Ni(OH) ‐C 4 ) through the self‐dissociation of oxalate in alkaline medium, leading notable enhancement yield at elevated current densities. Remarkably, Ni(OH) exhibits 2e selectivity exceeding 93% across broad voltage range (0.0 0.5 V vs RHE) 0.1 M KOH, outperforming pristine . When deployed as gas diffusion electrode flow cell, catalyst demonstrates operation 50 h 200 mA cm −2 , with Faradaic efficiency surpassing 90% peak 6.2 mol g −1 cat Comprehensive advanced characterizations, including situ Raman spectroscopy, transient photovoltage spectra, potential scanning coupled post‐ORR analyses, reveal that surface‐adsorbed groups on enhance interfacial kinetics between active Ni sites reactants by inducing charge trapping effect forming hydrogen‐bonded network, facilitating robust high‐yield production.

Language: Английский

Silver Nanoparticle-Decorated NiFe-MOFs as Highly Active Electrocatalysts for Overall Water Splitting DOI
Conghui Zhang, Hao Chen,

Chenyue Zhou

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Language: Английский

Citations

0
Synergistic catalytic mechanism of cyanide-bridged Ni-Fe bimetallic electrocatalyst for highly efficient urea oxidation DOI

Zhanhong Zhao,

Zeng He, Yitong Zhou

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125414 - 125414

Published: April 1, 2025

Language: Английский

Citations

0
Ultrahigh Pyrrolic Nitrogen Triggers High-Activity Sites in Carbon Catalysts for Selective Oxygen Reduction to Efficient H2O2 Production DOI
Yanan Shi, Menggai Jiao, Chongyang Wang

et al.

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120450 - 120450

Published: May 1, 2025

Language: Английский

Citations

0
Heterostructure of Fe3O4 Confined in Hierarchical Porous Carbon for Interface‐Enhanced Medical‐Grade H2O2 Electrosynthesis DOI Creative Commons
Yanan Shi, Lili Zhang, Chongyang Wang

et al.

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

Published: May 19, 2025

Abstract The electrocatalytic two‐electron oxygen reduction reaction (2e − ORR) presents an environmentally sustainable approach to produce hydrogen peroxide (H 2 O ). Heterostructures coupling non‐noble transition metal oxides (TMOs) with carbon materials hold promise for 2e ORR, but face challenges in controlling morphology, phase composition, and active centers. In this study, a hierarchically porous tremella‐like heterojunction characterized by ultrafine cubic Fe 3 4 nanoparticles within the amorphous (UFe @HPAC) is obtained using integrated platform of green Fe‐based deep eutectic solvent via two‐step annealing process. UFe @HPAC exhibits remarkable overall intrinsic ORR activity, delivering 96% H selectivity turnover frequency (TOF) 67.5 s −1 . Notably, possesses superior production capabilities, showing long‐term stability 100 h rate 8.1 g L flow‐cell, while achieving various medical‐grade concentrations (3.0–7.8 wt%). Additionally, integrating on‐site electro‐Fenton achieved rapid decomposition contaminants. unique heterostructure, synergistic effect carbon, enhances electronic conductivity. Moreover, redistribution at interface heterostructure triggers thermodynamically favorable multiple sites C centers ORR. This work offers new perspective on metal‐based production.

Language: Английский

Citations

0
Multiscale Catalyst Engineering for Stable, Selective, and Carbon‐Neutral Industrial Hydrogen Peroxide Electrosynthesis DOI Creative Commons
Mengxue Yang, Zhiyong Zhao,

Tianyu Zhi

et al.

Carbon Neutralization, Journal Year: 2025, Volume and Issue: 4(3)

Published: May 1, 2025

ABSTRACT The electrocatalytic two‐electron oxygen reduction reaction (2e − ORR) has emerged as a pivotal strategy for sustainable hydrogen peroxide (H 2 O ) synthesis, offering carbon‐neutral alternative to the energy‐intensive anthraquinone process. This review critically synthesizes recent breakthroughs in catalyst design, mechanistic understanding, and system integration address persistent selectivity–stability trade‐off. Key advances include atomic‐level engineering of electronic modulation surface functionalization hydrophobicity control, which achieve > 95% H selectivity by precisely tuning *OOH adsorption energy suppressing 4e pathways. Hierarchical architectures, such flow‐through electrodes catalytic membranes, extend operational stability beyond 500 h at industrial current densities (> 200 mA cm through confinement effects interfacial engineering. Emerging operando characterization techniques coupled with machine learning‐accelerated simulations now enable dynamic mapping active‐site evolution degradation mechanisms. System‐level innovations integrating renewable input circular carbon strategies demonstrate pilot‐scale feasibility net‐negative emission production. However, challenges scalability, long‐term durability under fluctuating loads, techno‐economic gaps between laboratory implementations require urgent attention. We propose multidisciplinary roadmap combining materials genome initiatives, modular reactor policy‐driven lifecycle assessment frameworks accelerate deployment 2e ORR systems. work provides actionable guidance advancing chemical manufacturing electrochemical routes aligned global net‐zero goals.

Language: Английский

Citations

0
Symmetry distortion engineering single-atom catalysts: Exceptional ORR activity and ultra-stable Zn-air batteries DOI
Zhenghao Chen, Tsung‐Cheng Yang, Chia‐Min Yang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 164156 - 164156

Published: May 1, 2025

Language: Английский

Citations

0
Phase Reconstruction‐Directed Synthesis of Oxalate‐Functionalized Nickel Hydroxide Electrocatalyst for High‐Yield H2O2 Generation at Industrial Currents DOI Creative Commons
Zhiwei Liu,

Weijie Yuan,

Hongyuan Yang

et al.

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

Published: Oct. 22, 2024

Abstract The electrochemical oxygen reduction reaction (2e − ORR) offers a promising approach for H 2 O production, yet developing highly active, selective, and stable electrocatalysts remains challenge. In this work, phase reconstruction strategy is presented to synthesize an oxalate‐adsorbed nickel hydroxide electrocatalyst (Ni(OH) ‐C 4 ) through the self‐dissociation of oxalate in alkaline medium, leading notable enhancement yield at elevated current densities. Remarkably, Ni(OH) exhibits 2e selectivity exceeding 93% across broad voltage range (0.0 0.5 V vs RHE) 0.1 M KOH, outperforming pristine . When deployed as gas diffusion electrode flow cell, catalyst demonstrates operation 50 h 200 mA cm −2 , with Faradaic efficiency surpassing 90% peak 6.2 mol g −1 cat Comprehensive advanced characterizations, including situ Raman spectroscopy, transient photovoltage spectra, potential scanning coupled post‐ORR analyses, reveal that surface‐adsorbed groups on enhance interfacial kinetics between active Ni sites reactants by inducing charge trapping effect forming hydrogen‐bonded network, facilitating robust high‐yield production.

Language: Английский

Citations

0