Metallic Nanoparticles in Heterogeneous Catalysis

Abstract

Heterogeneous catalysis is a chemical process achieved at solid-gas or solid-liquid interfaces. Many factors including the particle size, shape and metal-support interfaces can have significant influences on the catalytic properties of metal catalysts. The recent progress in the synthesis techniques and advanced characterization tools allow to understand the catalytic mechanisms at molecular level. In this Review, the size and shape dependent catalytic chemistry of metal nanoparticles and their electronic properties will be discussed. Then the unique catalytic chemistry at the metal-support interfaces will be discussed in details. Furthermore, the challenges of bimetallic nanoparticle catalytic chemistry will be discussed.

A Pragmatic Perspective of the Antibacterial Properties of Metal-Based Nanoparticles

“…Thus, we propose that the antibacterial efficacy of a metal-based nanoparticle, in the human body, is due to protein corona-bacterium interactions. These are enhanced and accelerated by the well-established behavior of nanoparticle surfaces [51]. This view is compatible with all of the observations which we have presented here.…”

“…First, the alloy nanoparticle does not function simply as a carrier, but as a bimetallic mediator, although not in the sense of a recent review [51], in which the bimetallic structure reorganizes so as to mediate reaction. In the present case, structural reorganization of the nanoparticle does not occur.…”

The Factors Dictating Properties of Atomically Precise Metal Nanocluster Electrocatalysts

“…Metal nanoparticles (NPs) occupy a crucial position and play significant roles in heterogeneous catalysis. [1][2][3][4][5][6][7][8][9][10] However, it is quite challenging to establish a precise correlation between the catalytic properties and structures of metal nanoparticles because of the complicated composition/structures of metal nanoparticles obtained by conventional synthesis. [5,6,[11][12][13][14] In order to deepen mechanistic understanding of heterogeneous catalysis, much efforts have always been directed at the synthesis of catalysts with atomically precise structures.…”

Facet-Dependent Reactivity of Ceria Nanoparticles Exemplified by CeO2-Based Transition Metal Catalysts: A Critical Review

“…In this regard, however, a critical question arises: Is it feasible to adjust the surface chemistry of earth-abundant but relatively inactive materials in order to exhibit similar or ever superior performance to that of NMs? On account to the enormous progress so far accomplished on nano-synthesis, surface/interface functionalization and catalyst promotion fields, the answer to this question is definitely yes, as recently demonstrated [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

“…High intrinsic activity of interfacial sites However, it is well-known today-thanks to the huge progress in cutting-edge characterization techniques-that the individual characteristics of catalyst's counterparts can notably affect not only their own activity but also the interaction between them with great consequences in catalysis. More specifically, by adjusting the geometrical and electronic features of the different counterparts through suitable synthetic and promotional routes highly active materials are obtained [12][13][14][15][16][17][18][19]21,22,24,27,56,[62][63][64][65][66][67][68][69][70][71][72][73][74]. Table 1 depicts at a glance, the main physicochemical modifications that can be induced by adjusting each of the aforementioned parameters.…”