Mediating Self‐Oxidation and Competitive Adsorption for Achieving High‐Selective Urea Oxidation Catalysis at Industrial‐Level Current Densities DOI Open Access
Pengfei Qiao, Guorui Li, Xiujuan Xu

et al.

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

Published: Dec. 23, 2024

Abstract Inhibiting the deactivation of nickel‐based catalysts caused by self‐oxidation and competitive adsorption behavior is still a major challenge for urea oxidation reaction (UOR), especially under industrial‐level current densities. In this study, crystalline NiSe 2 /amorphous NiFe‐LDH (NiSe /NiFe‐LDH) heterojunction catalyst rationally constructed selective electrocatalytic UOR. situ Raman spectra ex characterization results reveal that such structure can tailor impede accumulation NiOOH species during UOR process. Density function theory simulations disclose self‐driven charge transport from electron‐deficient region to electron‐rich would induce formation local electrophilic/nucleophilic adsorb electron‐donating ‐NH electron‐withdrawing C = O groups, respectively. This optimizes molecules hinders overaccumulation OH − ions on surface /NiFe‐LDH, which beneficial priority occurrence over oxygen evolution (OER) realization high selectivity. Benefiting tailored favorable adsorption, /NiFe‐LDH could act as high‐selective anode achieve ultrahigh 800 mAcm −2 only at 1.447 V. Besides, UV–vis spectrophotometry also unveiled has capability electrochemically degrade urea, offering great promise practical application potentials.

Language: Английский

Reconstruction of Ni-based catalyst for electrocatalytic urea oxidation reaction DOI

Xuena Gao,

Jianguo Dong, Huimin Yang

et al.

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: 1012, P. 178477 - 178477

Published: Jan. 1, 2025

Language: Английский

Citations

1
Progress on electrochemical and photoelectrochemical urea and ammonia conversion from urine for sustainable wastewater treatment DOI Creative Commons
Sophia Akkari, Carlos M. Sánchez‐Sánchez, Guillaume Hopsort

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 362, P. 124718 - 124718

Published: Oct. 20, 2024

Language: Английский

Citations

4
High‐Performance Electrocatalysts of Potassium Lactate Oxidation for Hydrogen and Solid Potassium Acetate Production DOI Creative Commons
Jun Hu, Xin Gao, Shanqing Li

et al.

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

Published: Feb. 13, 2025

Abstract With the increasing use of polylactic acid (PLA), more attention is turning to its post‐treatment. Current methods such as natural decomposition, composting, and incineration are limited by significant carbon dioxide emissions resource waste. Here, an efficient electrocatalytic conversion approach presented transform PLA waste into high‐value chemicals, particularly potassium acetate (AA‐K). By combining experimental theoretical calculation, a high‐performance catalyst Ni(Co)OOH developed, which exhibits current density 403 mA cm⁻ 2 at 1.40 V (vs RHE) with 96% Faraday efficiency for AA‐K in electrooxidation lactate (LA‐K, product degradation KOH). Through situ spectroscopy techniques functional theory calculations, structural regulation catalyst, reaction pathways elucidated. Further experiments demonstrate superior catalytic performance industrial‐scale tandem system. In h electrolysis, 320 g produces 232 L H₂, yielding 1200 97% purity after neutralization drying. The system demonstrates high (approaching 97%) diverse real forms, including powder, cups, fibers, cloth. This research provides scalable sustainable upcycling.

Language: Английский

Citations

0
Strategies for Modulating Ni-based Layered Double Hydroxides for Boosting Urea Electrooxidation DOI
Chang‐Hyeon Ji, Jipeng Wang,

Sheng Feng

et al.

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179306 - 179306

Published: Feb. 1, 2025

Language: Английский

Citations

0
Sulfhydryl group modified layered double hydroxide accelerates the formation of NiOOH active phase for enhanced urea oxidation reaction DOI
Mingqiang Chen, Wenda Zhang,

Qingna Gong

et al.

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 641, P. 236834 - 236834

Published: March 21, 2025

Language: Английский

Citations

0
Electron Shuttling of Iron‐Oxygen‐Cobalt Bridging in Cobalt Assembled Iron Oxyhydroxide Catalyst Boosts the Urea Oxidation Stability and Activity DOI Open Access

Guizeng Liang,

Rongrong Zhang, C. S. Ji

et al.

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

Published: March 21, 2025

Abstract Iron (Fe)‐based materials hold great potential as urea oxidation reaction (UOR) catalysts, however, the deactivation of active Fe‐oxyhydroxide (FeOOH) species induced by its dissolution during catalytic process under high current densities is still significant challenge. Herein, cobalt (Co) assembled FeOOH constructed, and formation Iron‐Oxygen‐Cobalt (Fe‐O‐Co) bridging triggers electron transfer from Co to Fe sites. This shuttling induces low valence state sites in FeOOH. Co‐FeOOH catalyst achieves a density 1000 mA cm −2 at voltage merely 1.59 V, showing substantial improvement compared pure (1.97 V). Meanwhile, urea‐assisted anion exchange membrane electrolyzer, after 24 h continuous operation , fluctuation 12.4%, significantly lower than that (49.9%). The situ experiments theoretical calculations demonstrate Fe‐O‐Co endows suppressive Fe‐segregation, fast charge Fe(Co)OOH phase negative‐shifted d‐band center metal sites, boosting UOR stability activity.

Language: Английский

Citations

0
Delamination of NiFe layered double hydroxides into perforated monolayers for efficient water splitting DOI
Huanran Li, Hong Pang, Wei Ma

et al.

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137478 - 137478

Published: March 1, 2025

Language: Английский

Citations

0
Formaldehyde oxidation reaction enhanced by interface engineering of Cu/Cu2O/Co(OH)2 composite electrocatalyst for bipolar hydrogen production DOI

Zi Qiang,

Chang Bao Han,

Wen Kang Zhao

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162568 - 162568

Published: April 1, 2025

Language: Английский

Citations

0
Superhydrophilicity and Electronic Modulation on Self‐Supported Lignin‐Derived Carbon Coupled with NiO@MoNi4 for Enhancing Urea Electrolysis DOI
Yunpeng Wang, Guangfu Qian, Hui Yu

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Developing highly efficient biomass-derived carbon-based electrocatalysts remains challenging for urea electrolysis because most of these show powder morphology, which can lead to Ostwald ripening during the reaction process, and its mechanism should be further verified. Herein, self-supported lignin-derived carbon coupling NiO@MoNi

Language: Английский

Citations

0
Mediating Self‐Oxidation and Competitive Adsorption for Achieving High‐Selective Urea Oxidation Catalysis at Industrial‐Level Current Densities DOI Open Access
Pengfei Qiao, Guorui Li, Xiujuan Xu

et al.

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

Published: Dec. 23, 2024

Abstract Inhibiting the deactivation of nickel‐based catalysts caused by self‐oxidation and competitive adsorption behavior is still a major challenge for urea oxidation reaction (UOR), especially under industrial‐level current densities. In this study, crystalline NiSe 2 /amorphous NiFe‐LDH (NiSe /NiFe‐LDH) heterojunction catalyst rationally constructed selective electrocatalytic UOR. situ Raman spectra ex characterization results reveal that such structure can tailor impede accumulation NiOOH species during UOR process. Density function theory simulations disclose self‐driven charge transport from electron‐deficient region to electron‐rich would induce formation local electrophilic/nucleophilic adsorb electron‐donating ‐NH electron‐withdrawing C = O groups, respectively. This optimizes molecules hinders overaccumulation OH − ions on surface /NiFe‐LDH, which beneficial priority occurrence over oxygen evolution (OER) realization high selectivity. Benefiting tailored favorable adsorption, /NiFe‐LDH could act as high‐selective anode achieve ultrahigh 800 mAcm −2 only at 1.447 V. Besides, UV–vis spectrophotometry also unveiled has capability electrochemically degrade urea, offering great promise practical application potentials.

Language: Английский

Citations

0