Synthesis of germanium-platinum nanoparticles as high-performance catalysts for spray-deposited large-area dye-sensitized solar cells (DSSC) and the hydrogen evolution reaction (HER)

Nanoscale
Suh-Ciuan LimHsing-Yu Tuan

Abstract

GePt3 and Ge2Pt nanoparticles were synthesized via a solution colloidal method as catalysts for dye-sensitized solar cells (DSSC) and the hydrogen evolution reaction (HER). The shape, size, arrangement, phases and crystalline structures of Ge-Pt nanoparticles were determined, and the ability to be dispersed in nonpolar solvents enabled them to form a catalyst ink with a stable ejection for the spray coating technique. A series of electrochemical analyses confirmed the catalytic properties of Ge-Pt nanoparticles toward the I-/I3- redox reaction system. The DSSC using GePt3 nanoparticles as the counter electrode exhibited excellent power conversion efficiency (PCE) of 8.04% at 0.16 cm2, which was comparable to that of a DSSC using Pt as the counter electrode (8.0%); it also exhibited an average PCE of 7.26% even at a large working area (2 cm2). In addition, the GePt3 catalyst exhibited excellent HER electrocatalytic performance with a large current density and a low Tafel slope, and it could stably operate at a working area of up to 5 cm2 with a low over potential (<0.06 V) to achieve 10 mA cm-2 cathodic current. This study provides fundamental insights into the preparation of germanium-platinum intermetallic compound catalysts a...Continue Reading

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Citations

Feb 2, 2021·Chemical Communications : Chem Comm·Tianyi YangJiatao Zhang
Jun 1, 2021·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Andoni UgartemendiaElisa Jimenez-Izal
Jul 15, 2021·Chemical Science·Carsten WalterMatthias Driess
Aug 25, 2021·Chemistry : a European Journal·Yuliang YuanHongwen Huang
Nov 3, 2021·Chemical Society Reviews·Susan M KauzlarichJesse Lundervold

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Methods Mentioned

BETA
scanning electron microscopy
X-ray
scanning
transmission electron microscopy
electron diffraction
electron exchange

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