Synthesis of nanoporous platinum thin films and application as hydrogen sensor

A Dewetted‐Dealloyed Nanoporous Pt Co‐Catalyst Formed on TiO2 Nanotube Arrays Leads to Strongly Enhanced Photocatalytic H2 Production

“…The dissolution of the less noble component is coupled with diffusion and aggregation of the more noble metal element at the solid/liquid interface: the overall process leaves behind a porous metal structure (a metal “sponge”) that can be enriched or mainly composed of the nobler element . Nanoporous metals prepared via selective dealloying of solid solutions possess a three‐dimensional (3D) structure of randomly interpenetrating ligaments/pores with sizes between a few nm to several tens of μm; these structural features can be precisely tuned by varying the preparation conditions (such as alloy composition, dealloying time, temperature, and electrochemical parameters) or by subsequent a thermal coarsening step …”

“…[24] Nanoporous metals prepared via selective dealloying of solid solutions possess a three-dimensional (3D) structure of randomly interpenetrating ligaments/pores with sizes between a few nm to several tens of mm; these structural features can be precisely tuned by varying the preparation conditions (such as alloy composition, dealloying time, temperature, and electrochemical parameters) or by subsequent a thermal coarsening step. [18,[25][26][27][28][29] In spite of the large application in heterogeneous catalysis, there is however still a comparably low number of studies on nanoporous metal co-catalysts for photocatalytic applications. Nguyen et al have reported on porous Au, [30] AuPt, [31] or PtPd [32] nanoparticles produced on TiO 2 nanotubes (NTs) by chemical dealloying of dewetted-alloyed nanoparticles.…”

Formation of copper porous structures under near-equilibrium chemical vapor deposition

“…Depending on structural and morphological characteristics porous structures and nanoparticles systems have great potential for application as catalysts [1][2][3][4][5], sensors [6][7][8][9][10], electrodes in electrochemical batteries [11][12][13][14], solar cells [15], fuel cells [16] and other active elements. Different methods are used with the purpose to form nanoparticles systems with uniform size and shape.…”

Polymer supports for the removal and degradation of hazardous organic pollutants: an overview

“…30 Generally, polymeric adsorbents can effectively trap many ubiquitous organic and inorganic contaminants, namely metal ions, phenolic compounds, organic acids, aromatic or polyaromatic hydrocarbons, alkanes and their derivatives. [31][32][33][34][35][36] For example, Long et al studied the adsorption of naphthalene in aqueous solution for three commercial polymeric adsorbents with different pore structures, obtaining maximum capacities of 7.9, 4.1 and 5.6 mmol g -1 , 37 and Pan et al studied the removal of dichloromethane from water onto a hydrophobic polymer obtaining an adsorption capacity of 25.5 mol kg -1 . 31 These polymeric materialswith the capability of removing contaminantsare available in different forms such as crosslinked polymers and polymeric nanocomposites ( Fig.…”