Metal–support interactions in catalysts for environmental remediation

Abstract

SMSIs in nanosilver–TiO2 form visible-light active crystalline TiOx while SOSIs through Pd–Ox–Ti stabilize single Pd atoms on TiO2.

Recent Progress with In Situ Characterization of Interfacial Structures under a Solid–Gas Atmosphere by HP-STM and AP-XPS

“…In recent years, studies on CO catalytic oxidation have been developed to address energy issues in chemical and petrochemical industries [38]. Many raw materials have not been rationally utilized because of their low efficiency [39]. The typical reaction of CO catalytic oxidation is often used as a model reaction to study the catalytic behavior of catalysts for complete oxidation profoundly because of its simplicity and feasibility of simulation.…”

“…The typical reaction of CO catalytic oxidation is often used as a model reaction to study the catalytic behavior of catalysts for complete oxidation profoundly because of its simplicity and feasibility of simulation. CO oxidation on metal/oxide-based heterogeneous catalysts is the most representative reaction to explore the mechanism of water−gas shift reaction [39,40]. On the one hand, Au, Pt, Pd, and other metals have the advantages of being highly catalytic for CO. On the other hand, an oxide such as TiO 2 itself has the advantages of a large specific surface area and high porosity, which enables the metal particles to be evenly distributed on the support surface to reduce the possibility of agglomeration of metal catalysts, thus improving the catalytic activity of metal catalysts for CO oxidation [41,42,43,44,45,46].…”

Wide‐bandgap HfO2‐V2O5 nanowires heterostructure for visible light‐driven photocatalytic degradation

“…Bandgap narrowing is therefore an important issue that is under intensive investigation. Bandgap narrowing has been done through doping, for example, a nonmetal (N, C, S, F) or metal ions (Fe, Cu, V, Pt, Fe, Cr, Co, B, and Mn) are used to dope TiO 2 …”

“…Bandgap narrowing has been done through doping, for example, a nonmetal (N, C, S, F) [11][12][13][14][15][16][17] or metal ions (Fe, Cu, V, Pt, Fe, Cr, Co, B, and Mn) are used to dope TiO 2 . [18][19][20][21][22][23][24][25][26] Ideally, a direct way to utilize the visible light is the use of a narrow bandgap photocatalyst. V 2 O 5 , with a bandgap of only 2.3 eV, has recently been widely investigated for photodegradation of organic pollutants.…”

Intelligent environmental nanomaterials

“…The field of rational design of nanomaterials for environmental engineering has experienced a significant growth in the past two decades. 15,[18][19][20][21][22][23] Since 1990s, nanomaterials with multiple, synergistic, and proactive functionalities have started to first emerge in many 'non-environmental' applications from shape-memory materials, 24,25 artificial muscles, 26,27 nanoscale motors, 28,29 and biosensors, [30][31][32] to new drug-delivery devices, 33,34 etc. These nanomaterials work as 'nanomachines' which, based on their environmental conditions, make self-adjustments for the purpose of maximizing their possibility to achieve their desired goals.…”