Green chemistry and first-principles theory enhance catalysis: synthesis and 6-fold catalytic activity increase of sub-5 nm Pd and Pt@Pd nanocubes

Abstract

Synthesizing metal nanoparticles with fine control of size, shape and surface properties is of high interest for applications such as catalysis, nanoplasmonics, and fuel cells. In this contribution, we demonstrate...

Theory of Anisotropic Metal Nanostructures

“…322−324 In addition to facet-selective diffusion and deposition induced by capping agents, a joint experimental-theoretical study showed that facet-selective reduction kinetics could underlie the solution-phase growth of Pd nanocubes and penta-twinned nanowires induced by bromide and formic acid in solution. 311 Mastronardi et al used DFT-based ab initio thermodynamics to show there is a synergy between the adsorption of Br and COOH, a decomposition product of formic acid on Pd (111) and Pd (100). The calculations predicted that {100} facets contained a mixture of Br and COOH, or just COOH, while {111} facets contained no COOH at high Br and formic acid concentrations, consistent with experimental conditions under which Pd cubes and pentatwinned nanowires formed.…”

“…For larger nanocrystals, surface diffusion on the facets can occur on the time scale of deposition. Studies have considered this scenario. − …”

“…In addition to facet-selective diffusion and deposition induced by capping agents, a joint experimental-theoretical study showed that facet-selective reduction kinetics could underlie the solution-phase growth of Pd nanocubes and penta-twinned nanowires induced by bromide and formic acid in solution . Mastronardi et al used DFT-based ab initio thermodynamics to show there is a synergy between the adsorption of Br and COOH, a decomposition product of formic acid on Pd(111) and Pd(100).…”

A multi-line platinum nanozyme-based lateral flow device for the colorimetric evaluation of total antioxidant capacity in different matrices

“…26,28,[33][34][35][36] Furthermore, it has been demonstrated that PtNP size and shape can signicantly modulate their catalytic properties, opening the possibility of tailored design and/or maximization of the catalytic activity of the nanoparticles. [37][38][39][40] In this application, we designed a hybrid system combining 5 nm Pt nanozymes with a paper-based device engineered with a multi-line Pt-based Lateral Flow Assay (LFA). Notably, this innovative strategy allows a semi-quantitative evaluation of TAC, providing a direct colorimetric readout within 10 minutes.…”

Trends in Green Chemistry Research between 2012 and 2022: Current Trends and Research Agenda

“…Nanotechnology and biotechnology also satisfactorily contribute to green chemistry through the synthesis of metallic nanoparticles for catalysis, nanoplasmonics, and fuel cells [34]. Research on blue-green-emitting fluorescent copper nanoclusters seeks easier analytical methods for myoglobin and L-thyroxine quantification.…”