Graphene-induced growth of Co3O4 nanoplates with modulable oxygen vacancies for improved OER properties,CrystEngComm

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Graphene-induced growth of Co3O4 nanoplates with modulable oxygen vacancies for improved OER properties
CrystEngComm ( IF 2.6 ) Pub Date : 2021-4-28 , DOI: 10.1039/d1ce00255d
Lei Qi _{1,

2,

3,

4,

5} , Mei Wang _{1,

2,

3,

4,

5} , Xinheng Li _{1,

2,

3,

4,

5}

Affiliation

Transition metal oxide/hydroxide is intensively studied for the oxygen evolution reaction (OER). Herein, the graphene-induced growth of Co₃O₄ nanoplates with modulable oxygen vacancies via a hydrothermal treatment is reported. With the increase of reaction time before the formation of Co(OH)₂, the oxygen vacancies and conductivity of Co₃O₄ nanoplates continued to increase resulting in dramatically enhanced OER performances_. An ultralow overpotential of 354 mV at a current density of 100 mA cm⁻² and a Tafel slope as low as 63.24 mV dec⁻¹ in 1 M KOH solution were obtained, superior to those of most reported oxides and RuO₂.

中文翻译：

石墨烯诱导的具有可调节氧空位的Co3O4纳米板的生长以改善OER性能

对于氧放出反应（OER），人们对过渡金属氧化物/氢氧化物进行了深入研究。在本文中，报道了通过水热处理石墨烯诱导的具有可调节氧空位的Co ₃ O ₄纳米板的生长。随着Co（OH）₂形成前反应时间的增加，Co ₃ O ₄纳米板的氧空位和电导率持续增加，导致OER性能大大提高_。在100 mA cm ^-2的电流密度和tafel斜率低至63.24 mV dec ^-1时为354 mV的超低过电势在1 M KOH溶液中制得的NaCl优于大多数报道的氧化物和RuO ₂。

更新日期：2021-05-20

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