Mechanism of photocatalytic CO<sub>2</sub> methanation on ultrafine Rh nanoparticles

Dai, Xinyan; Sun, Yugang

doi:10.1039/d3nh00506b

Nanoscale Horiz.

2024

DOI: 10.1039/d3nh00506b

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Mechanism of photocatalytic CO₂ methanation on ultrafine Rh nanoparticles

Xinyan Dai,

Yugang Sun

Abstract: Selective hydrogenation of CO2 to yield CH4 relies on the appropriate catalysts that can facilitate the cleavage of C=O bonds and dissociative adsorption of H2. Ultrafine Rh nanoparticles loaded on...

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Generalized Synthesis of Highly‐Dispersed, Ultrafine Transition Metal Nanoparticles on Silica Spheres for Enhanced Optical Absorption

Wei,

Wu,

Zuo

et al. 2024

Small Methods

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Robust synthesis of ultrafine metal nanoparticles (ufMNPs) below 5 nm with clean surfaces and strong optical absorption in the visible spectral range is challenging due to their instability originating from large surface‐to‐volume ratios. This work reports a general strategy involving two sequential steps: i) loading metal precursor ions onto the surface of silica nanospheres (SiOx NSs) by forming a uniform coating of metal oxyhydroxide [MOy(OH)z] through preferred surface acid–base reactions and ii) thermally reducing MOy(OH)z in forming gas at elevated temperatures to form ufMNPs evenly dispersed on the surface of SiOx NSs. The capability of this synthesis strategy is verified by loading ufMNPs of various transition metals and bimetallic combinations onto the SiOx NSs. The ufMNPs exhibit strong optical absorption enhanced by the optical scattering resonances in the SiOx NSs, which generate intense electric fields near the surface of the SiOx NSs. The SiOx NSs also support stabilizing the ufMNPs, which do not need additional organic capping reagents. The successful synthesis of SiOx‐NS‐supported ufMNPs with clean surfaces and enhanced optical absorption is promising for exploring the photocatalytic properties of ufMNPs.

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Generalized Synthesis of Highly‐Dispersed, Ultrafine Transition Metal Nanoparticles on Silica Spheres for Enhanced Optical Absorption

Wei,

Wu,

Zuo

et al. 2024

Small Methods

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Vacancy-enhanced photothermal activation for CO2 methanation on Ni/SrTiO3 catalysts

Li,

Tang,

Yan

et al. 2024

Applied Catalysis B: Environment and Energy

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Mechanism of photocatalytic CO₂ methanation on ultrafine Rh nanoparticles

Abstract: Selective hydrogenation of CO2 to yield CH4 relies on the appropriate catalysts that can facilitate the cleavage of C=O bonds and dissociative adsorption of H2. Ultrafine Rh nanoparticles loaded on...

Cited by 2 publications

References 46 publications

Generalized Synthesis of Highly‐Dispersed, Ultrafine Transition Metal Nanoparticles on Silica Spheres for Enhanced Optical Absorption

Generalized Synthesis of Highly‐Dispersed, Ultrafine Transition Metal Nanoparticles on Silica Spheres for Enhanced Optical Absorption

Vacancy-enhanced photothermal activation for CO2 methanation on Ni/SrTiO3 catalysts

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Mechanism of photocatalytic CO2 methanation on ultrafine Rh nanoparticles

Abstract: Selective hydrogenation of CO2 to yield CH4 relies on the appropriate catalysts that can facilitate the cleavage of C=O bonds and dissociative adsorption of H2. Ultrafine Rh nanoparticles loaded on...

Cited by 2 publications

References 46 publications

Generalized Synthesis of Highly‐Dispersed, Ultrafine Transition Metal Nanoparticles on Silica Spheres for Enhanced Optical Absorption

Generalized Synthesis of Highly‐Dispersed, Ultrafine Transition Metal Nanoparticles on Silica Spheres for Enhanced Optical Absorption

Vacancy-enhanced photothermal activation for CO2 methanation on Ni/SrTiO3 catalysts

Contact Info

Product

Resources

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Mechanism of photocatalytic CO₂ methanation on ultrafine Rh nanoparticles