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Manganese-facilitated dynamic active-site generation on Ni2P with self-termination of surface reconstruction for urea oxidation at high current density.
Zhao, Zhanhong; Dong, Yinrui; Ding, Haoran; Li, Xin; Chang, Xinghua.
Afiliación
  • Zhao Z; School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
  • Dong Y; School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
  • Ding H; School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
  • Li X; School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
  • Chang X; School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China. Electronic address: changxinghua@csu.edu.cn.
Water Res ; 253: 121266, 2024 Apr 01.
Article en En | MEDLINE | ID: mdl-38394933
ABSTRACT
Electrochemical urea oxidation reaction (UOR) suffers from sluggish reaction kinetics due to its complex 6-electron transfer processes combined with conversion of complicated intermediates, severely retarding the overall energy conversion efficiency. Herein, manganese-doped nickel phosphide nanosheets (Mn-Ni2P) are constructed and employed for driving UOR. Comprehensive analysis deciphers that Mn doping could efficiently accelerate the surface reconstruction of Mn-Ni2P electrode, generating highly reactive NiOOH-MnOOH heterostructure with local nucleophilic and electrophilic regions. Such unique structure could accelerate the targeted adsorption and activation of C and N atoms, promoting fracture of CN bond in urea. In addition, moderate Mn doping could efficiently enhance the adsorption capacities of urea molecules and some key intermediates, and minish the energy barrier for *CO2 desorption, accelerating refreshing of the catalyst. Consequently, the Mn-Ni2P electrode exhibits excellent UOR catalytic activity, achieving an industrial-level current density of 1000 mA cm-2 at 1.46 V (vs. RHE).
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Urea / Manganeso Idioma: En Revista: Water Res Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Urea / Manganeso Idioma: En Revista: Water Res Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido