One-Step Synthesis of PtCu Alloyed Nanocages with Highly Open Structures as Bifunctional Electrocatalysts for Oxygen Reduction and Polyhydric Alcohol Oxidation

Abstract

Three-dimensional (3D) bimetallic PtCu alloyed nanocages (NCs) with highly open structures and large external-and internal-surfaces accessible for reactants were facilely synthesized by a one-pot solvothermal method. Arginine and cetyltrimethylammonium chloride (CTAC) acted as the costructure-directors and stabilizing agents. The resultant PtCu NCs showed significantly enhanced catalytic activity and improved stability when compared to commercial Pt/C (50 wt %) and Pt black catalysts toward oxygen reduction reaction (ORR), ethylene glycol oxidation reaction (EGOR), and glycerol oxidation reaction (GOR) in alkaline electrolyte. This work provides guidelines for rational synthesis of highly open cagelike architectures.

Intermetallic PtCu Nanoframes as Efficient Oxygen Reduction Electrocatalysts

“…The mass activity (MA) of O -PtCuNF/C (2.47 A mg Pt –1 ) was also 2.1 and 7.7 times higher than those of D -PtCuNF/C and Pt/C, respectively (Figure d). Importantly, the MA of O -PtCuNF/C surpasses those of PtCu-based ORR catalysts reported to date, including PtCu/Pt core/shell NPs, PtCu intermetallic NPs, and tailored PtCu nanoarchitectures (Figure e). ,− We note that O -PtCuNF/C w/o SiO 2 showed ECSA Hupd and ORR activity much lower than that of O -PtCuNF/C, highlighting the crucial role of silica coating (Figure S12).…”

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

“…Despite their successful etching treatment, structural collapse is inevitable to some extent in other samples. To solve this problem, Feng's group reported a facile one‐pot method for the fabrication of PtCu alloy nanocages with a well‐defined structure . They argued that arginine serves as the most important structure‐directing agent (Figure d).…”

“…d) Schematic illustration of the PtCu nanocages (reprinted with permission from Ref. , Copyright 2018 American Chemical Society).…”

超细PtCu纳米线的表面结构调控及其增强的醇类 电催化氧化作用

“…Meanwhile, precisely controlled fabrication of Pt-based alloys with tailored facets and compositions can not only improve the utilization efficiency of Pt, but also modify the electronic and geometric structures, thus benefiting for achieving higher catalytic activities [40][41][42][43]. Recently, Feng and co-workers [44] demonstrated that bimetallic PtCu alloyed nanocages with high-index facets exhibited enhanced catalytic activities toward oxygen reduction and polyhydric alcohol oxidation. Remarkably, massive studies show that onedimensional (1D) nanowires (NWs) exhibit enhanced electrocatalytic activity owing to their large surface area, high surface electron conductivity, surface defects, and abundant unique quantum effects [45][46][47][48][49][50][51][52][53].…”