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Facilely synthesized nitrogen-doped reduced graphene oxide functionalized with copper ions as electrocatalyst for oxygen reduction
npj 2D Materials and Applications ( IF 9.7 ) Pub Date : 2021-01-04 , DOI: 10.1038/s41699-020-00185-x
Nadia Garino , Juqin Zeng , Micaela Castellino , Adriano Sacco , Francesca Risplendi , Michele Re Fiorentin , Katarzyna Bejtka , Angelica Chiodoni , Damien Salomon , Jaime Segura-Ruiz , Candido F. Pirri , Giancarlo Cicero

Nitrogen-doped reduced graphene oxide is successfully synthesized and functionalized with hydroxylated copper ions via one-pot microwave-assisted route. The presence of cationic Cu coordinated to the graphene layer is fully elucidated through a set of experimental characterizations and theoretical calculations. Thanks to the presence of these hydroxyl-coordinated Cu2+ active sites, the proposed material shows good electrocatalytic performance for the oxygen reduction reaction, as evidenced by an electron transfer number of almost 4 and by high onset and half-wave potentials of 0.91 V and 0.78 V vs. the reversible hydrogen electrode, respectively. In addition, the N-doped Cu-functionalized graphene displays a superior current retention with respect to a commercial Pt/C catalyst during the stability test, implying its potential implementation in high-performance fuel cells and metal-air batteries.



中文翻译:

铜离子官能化的易合成氮掺杂还原氧化石墨烯作为还原氧的电催化剂

通过一锅微波辅助路线成功地合成了氮掺杂的还原氧化石墨烯并用羟基化的铜离子将其官能化。通过一组实验表征和理论计算,可以完全阐明与石墨烯层配位的阳离子Cu的存在。由于存在这些羟基配位的Cu 2+在活性位点上,拟议的材料对氧还原反应显示出良好的电催化性能,这由可转移氢电极的近乎4的电子转移数和0.91 V和0.78 V的高起始和半波电势证明。此外,在稳定性测试过程中,N掺杂的Cu官能化石墨烯相对于商用Pt / C催化剂显示出优异的电流保持能力,这暗示了其在高性能燃料电池和金属空气电池中的潜在应用。

更新日期:2021-01-04
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