CO2 reforming of CH4 (CRM) is not only beneficial to environmental protection, but also valuable for industrial application. Different CeO2 supports were prepared to investigate the matching between Ni and CeO2 over Ni/CeO2 and its effect on CRM. The physicochemical properties of Ni/CeO2-C (commercial CeO2), Ni/CeO2-H (hydrothermal method) as well as Ni/CeO2-P (precipitation method) were characterized by XRD, N2 adsorption at − 196 °C, TEM, SEM–EDS, H2-TPR, NH3-TPD and XPS. Ni0 with good dispersion and CeO2 with more oxygen vacancies were obtained on Ni/CeO2-H, proving the influence on Ni/CeO2 catalysts caused by the preparation methods of CeO2. The initial conversion of both CO2 and CH4 of Ni/CeO2-H was more than five times that of Ni/CeO2-P and Ni/CeO2-C. The better matching between Ni and CeO2 on Ni/CeO2-H was the reason for its best catalytic performance in comparison with the Ni/CeO2-C and Ni/CeO2-P samples.
The appearance of the "double carbon" era indicates more significant concerns in CO2 utilization. CO2 to methanol is one of the most promising methods for converting CO2, but the extensive...
Photocatalysis technology is a potential solution to solve the problem of environmental pollution and energy shortage, but its wide application is limited by the low efficiency of solar energy conversion. As a non-toxic and inexpensive n-type semiconductor, WO3 can absorb approximately 12% of sunlight which is considered one of the most attractive photocatalytic candidates. However, the narrow light absorption range and the high recombination rate of photogenerated electrons and holes restrict the further development of WO3-based catalysts. Herein, the studies on preparation and modification methods such as doping element, regulating defects and constructing heterojunctions to enlarge the range of excitation light to the visible region and slow down the recombination of carriers on WO3-based catalysts so as to improve their photocatalytic performance are reviewed. The mechanism and application of WO3-based catalysts in the dissociation of water, the degradation of organic pollutants, as well as the hydrogen reduction of N2 and CO2 are emphatically investigated and discussed. It is clear that WO3-based catalysts will play a positive role in the field of future photocatalysis. This paper could also provide guidance for the rational design of other metallic oxide (MOx) catalysts for the increasing conversion efficiency of solar energy.
Long afterglow luminescent (LAL) materials as an inner light source supporting photocatalytic activity for alleviating the energy crisis and environmental pollution.
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