NiFe Nanoalloys Derived from Layered Double Hydroxides for Photothermal Synergistic Reforming of CH₄ with CO₂

Abstract

Dry reforming of methane (DRM) with carbon dioxide to produce syngas is currently attracting a lot of attention for converting greenhouse gases into valuable chemicals. However, harsh reaction conditions in thermal catalysis hinder practical applications. Herein, a series of alumina‐supported NixFey nanoalloys are synthesized from NiFeAl‐layered double hydroxide precursors, with the obtained catalysts used for photothermal synergistic DRM. The Ni3Fe1 nanoalloy catalyst shows a syngas production rate of 0.96 mol g–1 h–1 under a 350 °C photothermal condition, which is about 1100 times higher than that of the same catalyst at the same temperature in the dark. Methane activation as the rate‐determining step in DRM is greatly enhanced by the localized surface plasmon resonance of the Ni3Fe1 nanoalloy in the ultraviolet region, thus accounting for the remarkably reduced reaction temperature. Meanwhile, the nanoalloy‐based photothermal synergistic DRM exhibits sunlight‐driven feasibility and 20 h of continuous operational stability.

Boosting Interfacial Charge Transfer with a Giant Internal Electric Field in a TiO2 Hollow-Sphere-Based S-Scheme Heterojunction for Efficient CO2 Photoreduction

“…1−3 Photocatalytic CO 2 reduction based on solar energy offers a sustainable strategy for converting CO 2 to generate fuels and chemicals to reduce the level of CO 2 in the atmosphere. 4 Nevertheless, efforts to decrease the level of CO 2 are still unsatisfying on a large scale due to the severe charge recombination and sluggish kinetics of photocatalysts. To promote the separation and transfer of photogenerated electrons and holes, numerous strategies have been developed for the design of efficient and cost-effective nanocatalysts, including heteroatom doping, 5 metal cocatalyst loading, 6 defect or crystal engineering, 7 nanostructure control, 8 and heterojunction construction.…”

“…The excessive consumption of traditional fossil fuels and the growing emission of greenhouse gas (CO 2 ) have led to emerging global energy and environmental crises. − Photocatalytic CO 2 reduction based on solar energy offers a sustainable strategy for converting CO 2 to generate fuels and chemicals to reduce the level of CO 2 in the atmosphere . Nevertheless, efforts to decrease the level of CO 2 are still unsatisfying on a large scale due to the severe charge recombination and sluggish kinetics of photocatalysts.…”

Polar Bear Hair Inspired Supra-Photothermal Promoted Water Splitting

“…Further investigations on the absorption efficiency of VCF and CF indicated that they had a similar sunlight absorption efficiency of over 95% across the broadband of the standard simulated sunlight (AM 1.5G) (Figure e). Besides this, no obvious localized surface plasmon resonance (LSPR) signal was observed . This was because the FeNi 3 nanoparticles were wrapped by the CNTs, and sunlight energy was basically absorbed by the carbon materials.…”

“…Besides this, no obvious localized surface plasmon resonance (LSPR) signal was observed. 26 This was because the FeNi 3 nanoparticles were wrapped by the CNTs, and sunlight energy was basically absorbed by the carbon materials. The above results indicated that the temperature difference was not caused by discrepant light absorption but by diverse heat loss.…”

Recent Advances in Dry Reforming of Methane via Photothermocatalysis

“…光热催化甲烷干重整研究进展 何展军 1,2 ，黄敏 1,3 ，林铁军 1 ，钟良枢 1,2,3,* [31][32][33][34][35][36][37][38][39][40][41][42][43][44] 率决定步骤的甲烷活化，从而显著了提升反应速 率。 除了惰性载体外，半导体材料负载的Ni基催 化剂也被用于光热催化DRM 33,37,41,44 。Lorber等…”