期刊
NANO ENERGY
卷 89, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106420
关键词
Au@Co2N0.67 nanodots; 3D N-doped graphene; Electrocatalyst; Water splitting; Zn-air batteries
类别
资金
- Basic Science Research Program [2019R1A2C1004983]
- Regional Leading Research Center Program through the National Research Foundation - Ministry of Science and ICT, South Korea [2019R1A5A8080326]
A novel multifunctional electrocatalyst based on ultrafine Au@Co2N0.67 core/shell nanodots interspersed 3D-NGr has been developed for water splitting and Zn-air batteries. This hybrid shows extraordinary activity and durability, similar to benchmark catalysts, with high performance, power density, and cycling life.
To meet the demands of the future green energy industry, there is a need for the cost-effective development of high-efficient electrocatalysts with optimal durability for water splitting and Zn-air batteries. In this work, a novel multifunctional electrocatalyst based on ultrafine Au@Co2N0.67 core/shell nanodots interspersed 3D-NGr (Au@Co2N0.67/3D-NGr) with extraordinary activity and durability toward the hydrogen evolution reaction, oxygen evolution reaction, and oxygen reduction reaction has been developed that tends to show similar activity to the benchmark Pt/C and RuO2/C catalysts. Significantly, the Au@Co2N0.67/3D-NGr hybrid shows excellent overall water splitting potential while requiring small cell voltages of 1.58 and 1.79 V to achieve 10 and 50 mA cm(-2), respectively. In addition, Zn-air batteries using the developed Au@Co2N0.67/3D-NGr hybrid demonstrate high performance, an expected open circuit potential of 1.46 V, a large power density of 142.8 mW cm(-2), good rechargeability, and a high cycling life.
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