In:
Angewandte Chemie, Wiley, Vol. 132, No. 34 ( 2020-08-17), p. 14641-14648
Abstract:
Designing cost‐effective and efficient electrocatalysts plays a pivotal role in advancing the development of electrochemical water splitting for hydrogen generation. Herein, multifunctional active‐center‐transferable heterostructured electrocatalysts, platinum/lithium cobalt oxide (Pt/LiCoO 2 ) composites with Pt nanoparticles (Pt NPs) anchored on LiCoO 2 nanosheets, are designed towards highly efficient water splitting. In this electrocatalyst system, the active center can be alternatively switched between Pt species and LiCoO 2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Specifically, Pt species are the active centers and LiCoO 2 acts as the co‐catalyst for HER, whereas the active center transfers to LiCoO 2 and Pt turns into the co‐catalyst for OER. The unique architecture of Pt/LiCoO 2 heterostructure provides abundant interfaces with favorable electronic structure and coordination environment towards optimal adsorption behavior of reaction intermediates. The 30 % Pt/LiCoO 2 heterostructured electrocatalyst delivers low overpotentials of 61 and 285 mV to achieve 10 mA cm −2 for HER and OER in alkaline medium, respectively.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v132.34
DOI:
10.1002/ange.202005241
Language:
English
Publisher:
Wiley
Publication Date:
2020
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