Fabricating Ru Atom-Doped Novel FeP4/Fe2PO5 Heterogeneous Interface for Overall Water Splitting in Alkaline Environment,ACS Applied Materials & Interfaces

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Fabricating Ru Atom-Doped Novel FeP4/Fe2PO5 Heterogeneous Interface for Overall Water Splitting in Alkaline Environment
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-09-15 , DOI: 10.1021/acsami.3c07326
Wei Xia ₁ , Mengyao Ma ₁ , Xiaoyan Guo ₁ , Daojian Cheng ₁ , Dengfeng Wu ₁ , Dong Cao ₁

Affiliation

Developing bifunctional electrocatalysts with low-content noble metals and high activity and stability is crucial for water splitting. Herein, we reported a novel Ru doped FeP₄/Fe₂PO₅ heterogeneous interface catalyst (Ru@FeP₄/Fe₂PO₅) for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) by heat treatment coupling electrodeposition strategy. Experiments disclosed that Ru@FeP₄/Fe₂PO₅ proclaimed excellent catalytic activity for the OER (249 mV@100 mA cm^–2) and HER (49 mV@10 mA cm^–2) in a 1 M KOH environment. More importantly, the mass activity and turnover frequency of Ru@FeP₄/Fe₂PO₅ were 117 and 108 times higher than that of commercial RuO₂ at an overpotential of 300 mV during the OER, respectively. In addition, the assembled Ru@FeP₄/Fe₂PO₅ || Ru@FeP₄/Fe₂PO₅ system could retain superior durability in a two-electrode system for 134 h at 300 mA cm^–2. Further mechanism studies revealed that Ru atoms in Ru@FeP₄/Fe₂PO₅ act in a key role for the excellent activity during water splitting because the electronic structure of Ru sites could be optimized by the interaction between Ru and Fe atoms at the interface to strengthen the adsorption of reaction intermediates. Besides, the introduction of Ru atoms could also enhance the charge transfer, which effectually accelerates the reaction kinetics. The strategy of anchoring Ru atom on novel heterostructure provides a promising path to boost the overall activity of electrocatalysts for water splitting.

中文翻译：

制备 Ru 原子掺杂的新型 FeP4/Fe2PO5 异质界面用于碱性环境中的整体水分解

开发低贵金属含量、高活性和稳定性的双功能电催化剂对于水分解至关重要。在此，我们报道了一种新型Ru掺杂FeP ₄ /Fe ₂ PO ₅异质界面催化剂（Ru@FeP ₄ /Fe ₂ PO ₅），通过热处理耦合电沉积策略用于析氧反应（OER）和析氢反应（HER）。实验表明，Ru@FeP ₄ /Fe ₂ PO ₅在1 M KOH环境中对OER (249 mV@100 mA cm ^–2 )和HER (49 mV@10 mA cm ^{–2 )表现出优异的催化活性。}更重要的是，在OER过程中过电势为300 mV时， Ru@FeP ₄ /Fe ₂ PO ₅的质量活性和周转频率分别比商业RuO _{2高117和108倍。}此外，组装的Ru@FeP ₄ /Fe ₂ PO ₅ || Ru@FeP ₄ /Fe ₂ PO ₅系统可以在双电极系统中在300 mA cm ^–2下保持134小时的优异耐久性。进一步的机理研究表明，Ru@FeP ₄ /Fe ₂ PO ₅中的Ru原子对于水分解过程中优异的活性起着关键作用，因为Ru位点的电子结构可以通过界面上Ru和Fe原子之间的相互作用来优化加强反应中间体的吸附。此外，Ru原子的引入还可以增强电荷转移，从而有效地加速反应动力学。将Ru原子锚定在新型异质结构上的策略为提高水分解电催化剂的整体活性提供了一条有前途的途径。

更新日期：2023-09-15

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