Enhancing Compatibility of Two‐Step Tandem Catalytic Nitrate Reduction to Ammonia Over P‐Cu/Co(OH)₂

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

Published: Sept. 11, 2024

Abstract Electrochemical nitrate reduction reaction (NO 3 RR) is a promising approach to realize ammonia generation and wastewater treatment. However, the transformation from NO − NH involves multiple proton‐coupled electron transfer processes by‐products 2 , H etc.), making high selectivity challenge. Herein, two‐phase nanoflower P‐Cu/Co(OH) electrocatalyst consisting of P‐Cu clusters P‐Co(OH) nanosheets designed match two‐step tandem process ) more compatible, avoiding excessive accumulation optimizing whole reaction. Focusing on initial 2e process, inhibited * desorption Cu sites in gives rise appropriate released electrolyte. Subsequently, exhibits superior capacity for trapping transforming desorbed during latter 6e due thermodynamic advantage contributions active hydrogen. In 1 m KOH + 0.1 leads yield rate 42.63 mg h cm Faradaic efficiency 97.04% at −0.4 V versus reversible hydrogen electrode. Such well‐matched achieves remarkable synthesis performance perspective catalytic reaction, offering novel guideline design RR electrocatalysts.

Language: Английский

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Efficient Tandem Electrocatalytic Nitrate Reduction to Ammonia on Bimodal Nanoporous Ag/Ag–Co across Broad Nitrate Concentrations

Nano Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 12, 2024

Electrocatalytic nitrate (NO

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Gelatin‐Induced Synthesis of Strain‐Engineered Spherical Cu₂O Nanoparticles for Efficient Nitrate Reduction to Ammonia

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

The electrochemical reduction of nitrate to ammonia offers an environmentally sustainable pathway for nitrogen fixation. However, achieving both efficiency and selectivity in presents a formidable challenge, due the involvement sluggish multielectron transfer processes. Herein, successful synthesis spherical Cu₂O nanoparticles (s-Cu₂O) exhibiting significant compressive strain effects, achieved through one-pot method using gelatin as structural modifier, is reported. s-Cu₂O catalyst demonstrates exceptional performance reaction (NO3RR), Faradaic (FENH3) 95.07%, 92.03%, conversion rate 97.77%, yield 284.83 µmol h⁻¹ cm⁻2 at -0.8 V versus reversible hydrogen electrode (vs. RHE) production. Structural characterization density functional theory calculations reveal that plays critical role modulating electronic structure catalyst, thereby activating *NO intermediate potential determining step effectively suppressing evolution reaction. Furthermore, it implemented Zn-NO3 - battery, test results indicate battery peak power 3.95 mW cm-2 0.129 (vs Zn/Zn2⁺), illustrating its excellent efficacy. This work introduces novel strategy rational design high-performance electrocatalysts engineering, offering broad implications energy-efficient synthesis, cycling.

Language: Английский

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Single Atom Embedding Enhanced Macroscopic Polarization in Carbon Nitride Nanosheets for pH-Universal Piezo-Photocatalytic Nitrate Reduction over a Wide Concentration Range

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 4025 - 4038

Published: Feb. 20, 2025

Language: Английский

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Ni(OH)₂/CoWO₄ S-Scheme Heterojunction for Enhanced Photocatalytic Hydrogen Evolution

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

Published: April 16, 2025

Language: Английский

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