EPR and optical spectra of Ni<sup>2+</sup>-V<sub>Ag</sub>in silver chloride and silver bromide

Wang, Huai-Qian; Kuang, Xiao‐Yu; Li, Hui-Fang

doi:10.1080/00268970902845271

Cited by 2 publications

(1 citation statement)

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“…EPR is a magnetic resonance technique that can study the microstructure and local environment around transition metal ions with an unpaired electron. The EPR spectrum can provide a detailed description of the electronic structure of the compound and the characteristics of the surrounding environment [ 55 ]. As shown in Figure 9 , a single resolved band was observed in the Ni 1.5 Co 0.5 AlO catalyst, and the g value was located at ~2.23, which was assigned to the resonance absorption of paramagnetic Ni 2+ ions [ 51 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

Synergistic Effect of Pt and Dual Ni/Co Cations in Hydrotalcite-Derived Pt/Ni1.5Co0.5AlO Catalysts for Promoting Soot Combustion

Zhang

Xiong

et al. 2023

Nanomaterials

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In this article, the catalysts of hydrotalcite-derived Ni1.5Co0.5AlO nanosheet-supported highly dispersed Pt nanoparticles (Ptn/Ni1.5Co0.5AlO, where n% is the weigh percentage of the Pt element in the catalysts) were elaborately fabricated by the gas-bubble-assisted membrane--reduction method. The specific porous structure formed by the stack of hydrotalcite-derived Ni1.5Co0.5AlO nanosheets can increase the transfer mass efficiency of the reactants (O2, NO, and soot) and the strong Pt–Ni1.5Co0.5AlO interaction can weaken the Ni/Co-O bond for promoting the mobility of lattice oxygen and the formation of surface-oxygen vacancies. The Ptn/Ni1.5Co0.5AlO catalysts exhibited excellent catalytic activity and stability during diesel soot combustion under the loose contact mode between soot particles and catalysts. Among all the catalysts, the Pt2/Ni1.5Co0.5AlO catalyst showed the highest catalytic activities for soot combustion (T50 = 350 °C, TOF = 6.63 × 10−3 s−1). Based on the characterization results, the catalytic mechanism for soot combustion is proposed: the synergistic effect of Pt and dual Ni/Co cations in the Pt/Ni1.5Co0.5AlO catalysts can promote the vital step of catalyzing NO oxidation to NO2 in the NO-assisted soot oxidation mechanism. This insight into the synergistic effect of Pt and dual Ni/Co cations for soot combustion provides new strategies for reducing the amounts of noble metals in high-efficient catalysts.

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Section: Resultsmentioning

confidence: 99%

Synergistic Effect of Pt and Dual Ni/Co Cations in Hydrotalcite-Derived Pt/Ni1.5Co0.5AlO Catalysts for Promoting Soot Combustion

Zhang

Xiong

et al. 2023

Nanomaterials

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The defect structure and EPR parameters for Er³⁺in molybdates: a complete energy matrices study

Kuang

Chai

et al. 2012

Molecular Physics

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EPR and optical spectra of Ni²⁺-V_Agin silver chloride and silver bromide

Cited by 2 publications

References 21 publications

Synergistic Effect of Pt and Dual Ni/Co Cations in Hydrotalcite-Derived Pt/Ni1.5Co0.5AlO Catalysts for Promoting Soot Combustion

Synergistic Effect of Pt and Dual Ni/Co Cations in Hydrotalcite-Derived Pt/Ni1.5Co0.5AlO Catalysts for Promoting Soot Combustion

The defect structure and EPR parameters for Er³⁺in molybdates: a complete energy matrices study

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EPR and optical spectra of Ni2+-VAgin silver chloride and silver bromide

Cited by 2 publications

References 21 publications

Synergistic Effect of Pt and Dual Ni/Co Cations in Hydrotalcite-Derived Pt/Ni1.5Co0.5AlO Catalysts for Promoting Soot Combustion

Synergistic Effect of Pt and Dual Ni/Co Cations in Hydrotalcite-Derived Pt/Ni1.5Co0.5AlO Catalysts for Promoting Soot Combustion

The defect structure and EPR parameters for Er3+in molybdates: a complete energy matrices study

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EPR and optical spectra of Ni²⁺-V_Agin silver chloride and silver bromide

The defect structure and EPR parameters for Er³⁺in molybdates: a complete energy matrices study