Engineering the electronic structure of FeP with rare earth elements to enhance the electrocatalytic hydrogen evolution performance,Journal of Materials Chemistry A

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Engineering the electronic structure of FeP with rare earth elements to enhance the electrocatalytic hydrogen evolution performance
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-07-29 , DOI: 10.1039/d3ta03610c
Wei Gao ₁ , Yujie Wu ₁ , Xinhao Wan ₁ , Jie Gao ₂ , Dan Wen ₁

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Modulating metal electrocatalysts by incorporating rare earth (RE) elements has been recently proposed as an effective strategy to improve their catalytic properties. Herein, various RE elements were employed to regulate the electronic structure of an FeP electrocatalyst, and clarify the relationship between RE elements and the electrocatalytic properties for hydrogen generation from experimental and theoretical investigations. Introducing RE elements into FeP regularly tuned the chemical states and electronic structures of FeP to affect intermediate adsorption, with a volcano-like relationship between RE elements and electronic structure as well as electrocatalytic activity for FeP. In particular, cerium as the dopant greatly enhanced the FeP performance, with ultra-small overpotentials of 51 and 100 mV required to drive a 10 mA cm⁻² current density as compared with FeP (77 and 155 mV) in acid and alkali, correspondingly. Thus, this work uncovers the influence of RE elements on modulating FeP and suggests the incorporation of RE elements as a novel approach to design highly active electrocatalysts for water electrolysis.

中文翻译：

用稀土元素改造 FeP 的电子结构以增强电催化析氢性能

最近提出通过掺入稀土（RE）元素来调节金属电催化剂作为提高其催化性能的有效策略。在此，采用各种稀土元素来调节FeP电催化剂的电子结构，并从实验和理论研究中阐明了稀土元素与产氢电催化性能之间的关系。将稀土元素引入FeP中会定期调整FeP的化学态和电子结构，从而影响中间吸附，稀土元素与电子结构以及FeP的电催化活性之间存在类似火山的关系。特别是，作为掺杂剂的铈极大地增强了 FeP 的性能，驱动 10 mA cm 所需的超电势分别为 51 和 100 mV^-2电流密度与 FeP（77 和 155 mV）相比，在酸和碱中相应地。因此，这项工作揭示了稀土元素对调节 FeP 的影响，并建议掺入稀土元素作为设计用于水电解的高活性电催化剂的新方法。

更新日期：2023-07-29

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