Tuning the Interfacial Electronic Coupling of NiO via CeO2 and nitrogen co-decoration for highly efficient oxygen evolution reaction
Tuning the Interfacial Electronic Coupling of NiO via CeO2 and nitrogen co-decoration for highly efficient oxygen evolution reaction
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DOI：
10.1016/j.cej.2021.134255
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发表时间：
2021-12
影响因子：
15.1
通讯作者：
Fan Yang;Xidong Zhang;Lijun Zhou;Shiwei Lin;Xianshuo Cao;Jiuxing Jiang;Xihong Lu
中科院分区：
文献类型：
--
作者：
Fan Yang;Xidong Zhang;Lijun Zhou;Shiwei Lin;Xianshuo Cao;Jiuxing Jiang;Xihong Lu
氧化镍（NiO）是一种很有前途的析氧反应（OER）电催化剂，但活性中心不足，OH-吸附性能差。在此，我们开发了一种有效的CeO 2和氮共装饰策略，以提高NiO（Ce/N-NiO）纳米粒子的OER性能显着。Ce/N-NiO纳米粒子之间的强电子耦合为氮掺杂NiO向CeO 2的界面电子转移提供了便利，并进一步诱导富Ni 3+表面的形成，赋予其丰富的活性中心。此外，表面电子的重新配置有力地促进了OH-的吸附，导致快速反应动力学。正如预期的那样，Ce/N-NiO样品显示出上级OER特性，在10 mA cm-2下具有250 mV的低过电位。特别地，当电流密度超过90 mA cm-2时，Ce/N-NiO的OER活性超过贵金属基RuO 2。这种共修饰方法为设计用于OER及更高的高性能催化剂提供了实用指南。
Nickel oxide (NiO) has emerged as a promising electrocatalyst for oxygen evolution reaction (OER) catalysis but undergoes insufficient active sites and unfavorable OH–adsorption properties. Herein, we develop an effective CeO2and nitrogen co-decoration strategy to boost the OER performance of NiO (Ce/N-NiO) nanoparticles dramatically. The strong electron coupling among Ce/N-NiO nanoparticles provide exceptional facilities for the interface electron transfer from nitrogen-doped NiO to CeO2, and further induces the formation of rich Ni3+surface, endowing it with abundant active sites. Besides, the surface electron reconfiguration energetically promotes the adsorption of OH–, resulting in fast reaction kinetics. As expected, the Ce/N-NiO sample shows superior OER property with a low overpotential of 250 mV at 10 mA cm−2. Particularly, when the current density exceeds 90 mA cm−2, the OER activity of Ce/N-NiO outstrips noble-metal-based RuO2. This co-decoration approach provides a practical guide for designing high-performance catalysts for OER and beyond.