Synergistic effect of diatomic materials on efficient formaldehyde sensing and degradation

Zhu, Zhouhao; Tao, Hengcong; Zhang, Renkun; Gan, Liyong; Zhou, Yingtang

doi:10.1039/d3ta06132a

Cited by 4 publications

(2 citation statements)

References 53 publications

(63 reference statements)

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“…Generally, a more positive ICOHP value indicates weaker binding. 59 The ICOHP value for CuNW@ AgNP hybrids is more positive than that for Cu NWs (cf. −1.83 eV vs −1.99 eV), further supporting the observation of easier desorption of C 8 N 9 N* from the hybrids.…”

Section: Mechanistic Studies Of Esh Over Cunw@agnp Hybridsmentioning

confidence: 99%

Enhancing Electrocatalytic Semihydrogenation of Alkynes via Weakening Alkene Adsorption over Electron-Depleted Cu Nanowires

Luo,

Xie,

Chen

et al. 2024

ACS Nanosci. Au

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Electrochemical semihydrogenation (ESH) of alkynes to alkenes is an appealing technique for producing pharmaceutical precursors and polymer monomers, while also preventing catalyst poisoning by alkyne impurities. Cu is recognized as a cost-effective and highly selective catalyst for ESH, whereas its activity is somewhat limited. Here, from a mechanistic standpoint, we hypothesize that electron-deficient Cu can enhance ESH activity by promoting the rate-determining step of alkene desorption. We test this hypothesis by utilizing Cu–Ag hybrids as electrocatalysts, developed through a welding process of Ag nanoparticles with Cu nanowires. Our findings reveal that these rationally engineered Cu–Ag hybrids exhibit a notable enhancement (2–4 times greater) in alkyne conversion rates compared to isolated Ag NPs or Cu NWs, while maintaining over 99% selectivity for alkene products. Through a combination of operando and computational studies, we verify that the electron-depleted Cu sites, resulting from electron transfer between Ag nanoparticles and Cu nanowires, effectively weaken the adsorption of alkenes, thereby substantially boosting ESH activity. This work not only provides mechanistic insights into ESH but also stimulates compelling strategies involving hybridizing distinct metals to optimize ESH activity.

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Section: Mechanistic Studies Of Esh Over Cunw@agnp Hybridsmentioning

confidence: 99%

Enhancing Electrocatalytic Semihydrogenation of Alkynes via Weakening Alkene Adsorption over Electron-Depleted Cu Nanowires

Luo,

Xie,

Chen

et al. 2024

ACS Nanosci. Au

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show abstract

“…The exceptional catalytic performance of COFs can be achieved by loading single atoms, which maximizes the preservation of their high surface area, porous structure, and atomic utilization efficiency of transition metals [ 39 ]. Although single-atom loading can improve adsorption capacity and molecule activation, the catalytic transformation of small gas molecules by single atoms is generally incomplete with activity still in need of enhancement [ 40 ]. Thus, embedding dual-atom catalysts in COFs presents a substantial opportunity to surpass the constraints of single-atom catalysts.…”

Section: Introductionmentioning

confidence: 99%

Complete Photooxidation of Formaldehyde to CO2 via Ni-Dual-Atom Decorated Crystalline Triazine Frameworks: A DFT Study

Lu,

Wang

2024

Toxics

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Formaldehyde (CH2O) emerges as a significant air pollutant, necessitating effective strategies for its oxidation to mitigate adverse impacts on human health and the environment. Among various technologies, the photooxidation of CH2O stands out owing to its affordability, safety, and effectiveness. Nitrogen-rich crystalline triazine-based organic frameworks (CTFs) exhibit considerable potential in this domain. Nevertheless, the weak and unstable CH2O adsorption hinders the overall oxidation efficiency of CTF. To address this limitation, we incorporate single and dual Ni atoms into nitrogen-rich CTFs by density functional theory (DFT) calculations, resulting in CTF-Ni and CTF-2Ni. This strategic modification significantly enhances the adsorption capability of CH2O. Notably, this synergy between Ni dual atoms activates CH2O by strong chemical adsorption, thereby reducing the energy barrier of CH2O oxidation and achieving the complete oxidation of CH2O to CO2. Moreover, the introduction of dual-atom Ni over CTF ameliorates visible and near-infrared light absorption and facilitates photoexcited charge transfer and separation. Finally, the underlying mechanisms of complete CH2O oxidation over CTF-2Ni are proposed. This work offers novel insights into the rational design of photocatalysts for CH2O oxidation through the integration of Ni dual atoms into CTFs.

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Fabrication of Pt functionalized LaFeO3 porous structures for highly sensitive detection of formaldehyde

Xiao,

Ma,

Gao

et al. 2024

Sensors and Actuators B: Chemical

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Synergistic effect of diatomic materials on efficient formaldehyde sensing and degradation

Abstract: Twenty-seven transition metals were screened as potential single atom and diatomic materials for detection and degradation of HCHO.

Cited by 4 publications

References 53 publications

Enhancing Electrocatalytic Semihydrogenation of Alkynes via Weakening Alkene Adsorption over Electron-Depleted Cu Nanowires

Enhancing Electrocatalytic Semihydrogenation of Alkynes via Weakening Alkene Adsorption over Electron-Depleted Cu Nanowires

Complete Photooxidation of Formaldehyde to CO2 via Ni-Dual-Atom Decorated Crystalline Triazine Frameworks: A DFT Study

Fabrication of Pt functionalized LaFeO3 porous structures for highly sensitive detection of formaldehyde

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