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Construction of Uniform Co–Sn–X (X = S, Se, Te) Nanocages via Anion Exchange Reaction with Enhanced Photovoltaics and Oxygen Evolution Properties

Abstract

Exploring highly efficient electrocatalysts has attracted increasing attention in electrochemical energy conversion. Therefore, we reported a simple self-template method to construct Co–Sn–X (X = S, Se, Te) nanocages through the anion exchange reaction of CoSn(OH)6 nanocubes with chalcogenide ions under mild solvothermal conditions. Benefiting from the compositional features and well-designed architecture advantages, the obtained Co–Sn–X (X = S, Se, Te) nanocages display enhanced electrocatalytic activity for dye-sensitized solar cells (DSSCs) and oxygen evolution reaction (OER) in alkaline electrolyte. Remarkably, the Co–Sn–Se nanocgaes as the counter electrode (CE) catalysts deliver prominent power conversion efficiency (PCE) of 9.25% for DSSCs compared with Pt CE (8.19%). Furthermore, when used as OER catalysts, the Co–Sn–Se nanocgaes also exhibit outstanding electrocatalytic activity in terms of low overpotential of 304 mV at the current density of 10 mA cm–2 and long-term durability in 1.0 M KOH solution. This work provides wide prospects in rationally designing and synthesizing high performance transition metal chalcogenides-based electrocatalysts in future energy transformation systems.

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Publication details

The article was received on 22 Sep 2018, accepted on 24 Oct 2018 and first published on 08 Nov 2018


Article type: Paper
DOI: 10.1039/C8NR07719C
Citation: Nanoscale, 2018, Accepted Manuscript
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    Construction of Uniform Co–Sn–X (X = S, Se, Te) Nanocages via Anion Exchange Reaction with Enhanced Photovoltaics and Oxygen Evolution Properties

    Q. He, S. Li, S. Huang, L. Xiao and L. Hou, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR07719C

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