Porous PtPd alloy nanotubes: towards high performance electrocatalysts with low Pt-loading

Abstract

Porous PtPd alloy nanotubes with Pt contents down to 5 at% are powerful, Pt-lean electrocatalysts.

Nanomechanical characterization and modeling of anodized porous aluminum oxide thin films with photografted anti-biofouling polymer brushes on their pore walls

“…The processing of SPE-coated AAO thin films on glass substrate is shown in Scheme 1, following the procedure presented in previous works (Berger and Es-Souni 2016;Laghrissi and Es-Souni 2019;Es-Souni et al 2019). A 500 nm aluminum film was deposited on a heterostructure Scheme 1 Schematic representation of the fabrication procedure of SPE-coated AAO thin films on glass substrate of Au(6 nm)/Ti(4 nm)/glass using electron beam evaporation in a PVD device (PVD75, Lesker, USA).…”

“…For the coating, a photo-grafting process following the procedure described in earlier work (Es-Souni et al 2019) was conducted to fill the pores with a zwitterionic polymer, Poly (sulfobetaine methacrylate), N,N-dimethyl-N-(2-methacryloyloxyethyl-N-(3-sulfopropyl)ammonium betaine (SPE).…”

“…Porous anodic aluminum oxide (AAO) is widely used for the template-assisted processing of nanomaterials (Xie et al 2016;Mijangos et al 2016). The structural features like the pore length, diameter, and density (Balde et al 2015;Berger et al 2016a;Sharma and Islam 2016;Chung et al 2017;Laghrissi and Es-Souni 2019) can be controlled via a proper choice of the anodization conditions and electrolyte, and are transferred to the nanostructures, because the pores are the molds in which the nanostructures are grown. More applications of AAO include photonic crystals (Wang et al 2007), the structural stabilization of polymeric films (Szuwarzyński et al 2013), and corrosion protection (Wojciechowski et al 2016;Yabuki et al 2019).…”

“…In this paper, 500 nm thick AAO films were obtained via anodization of a thin aluminum film on a glass substrate and subsequently coated with a non-fouling, zwitterionic polymer, namely poly (sulfobetaine methacrylate), N, ammonium betaine (SPE), using a photografting technique as described in previous work (Es-Souni et al 2019). Their nanomechanical properties are investigated using a nanoindenter device and compared to those of non-coated AAO films.…”

A one-pot route for the synthesis of Au@Pd/PMo12/rGO as a dual functional electrocatalyst for ethanol electro-oxidation and hydrogen evolution reaction

“…Recent studies have demonstrated that incorporating a second metal into Pd nanostructures, giving rise to bimetallic nanoparticles (NPs) such as AuPd, PdNi, PdAg, can signicantly improve catalytic activity due to a synergetic effect between two combined metals. [7][8][9][10][11][12] Among these bimetallic nanoparticles, AuPd NPs are of special interest because of their high catalytic activity. [13][14][15] Currently, there are a number of synthetic procedures towards Pd-based bimetallic NPs such as co-reduction, seedmediated-growth in aqueous solution, electrodeposition, thermal decomposition, and galvanic replacement reaction.…”