TiO 2 pigments are widely used in paint industries. Inert coating layers were usually deposited on the TiO 2 pigments to suppress the photocatalytic activity of TiO 2 , which can prevent the degradation of surrounding polymer molecules. However, the traditional wet chemical methods normally form thick films, which would impair the pigment properties of TiO 2 . In this work, SnO 2 and SiO 2 protective layers were grown on the TiO 2 particle surface by lowtemperature pulsed chemical vapor deposition. At temperatures <60 °C, thin and uniform amorphous SnO 2 films were obtained. The photocatalytic activities of both TiO 2 /SnO 2 and TiO 2 /SiO 2 core−shell particles were suppressed, and TiO 2 /SnO 2 core− shell particles showed higher lightening power than TiO 2 /SiO 2 . According to transient fluorescence, photocurrent, and electrochemical impedance spectroscopy measurements, the low electron mobility of amorphous SnO 2 and SiO 2 films led to fast recombination of photogenerated electrons and holes, thus preventing their migration to the surface and suppressing the photocatalytic activity of TiO 2 .

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Sulfur‐resistant CO methanation by using MoS2‐based catalysts possesses potential to produce synthetic natural gas from the direct use of un‐desulfurized syngas with a low H2/CO ratio in industry. However, hotspots raised in the high exothermic reaction lead to catalyst deactivation and an uncontrollable reactor temperature, both of which hinder industrial applications. A metal‐structured MoS2‐Al2O3/Ni‐foam catalyst with stable MoS2 active species and high heat‐transfer efficiency was synthesized to resist deactivation and to remove the heat of the reaction through a hydrothermal synthesis process. This catalyst exhibited superior activity and stability in the sulfur‐resistant methanation of syngas and has potential applications in highly exothermic and endothermic reactions.