Strong electronic coupled FeNi3/Fe2(MoO4)3 nanohybrids for enhancing the electrocatalytic activity for the oxygen evolution reaction,Inorganic Chemistry Frontiers

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Strong electronic coupled FeNi3/Fe2(MoO4)3 nanohybrids for enhancing the electrocatalytic activity for the oxygen evolution reaction
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2020-06-10 , DOI: 10.1039/d0qi00525h
Zhaolong Wang _{1,

2,

3,

4,

5} , Jian Bao _{1,

2,

3,

4,

5} , Wenjun Liu _{1,

2,

3,

4,

5} , Li Xu _{1,

2,

3,

4,

5} , Yiming Hu _{1,

2,

3,

4,

5} , Meili Guan _{1,

2,

3,

4,

5} , Min Zhou _{6,

7,

8,

9,

10} , Huaming Li _{1,

2,

3,

4,

5}

Affiliation

Electrocatalytic water splitting has been regarded as a feasible strategy for the production of clean hydrogen energy. However, the complex and slow oxygen evolution reaction (OER) process during operation greatly limits its application, thus the development of inexpensive and highly efficient electrocatalysts is of great importance. In this regard, a novel FeNi₃/Fe₂(MoO₄)₃ hybrid electrocatalyst is successfully synthesized via a facile hydrothermal reaction and subsequent calcination process. Benefiting from the strong electronic coupling interfaces between FeNi₃ and Fe₂(MoO₄)₃, the electron-withdrawing effect of Mo⁶⁺ could maintain active sites with a high-valence state from FeNi₃, thereby contributing to a superior OER performance. Such a hybrid composite shows a low overpotential of 248 mV, achieving a current density of 10 mA cm⁻² and satisfactory long-term stability. The superior catalytic activity outstrips most previous reports of non-precious metal electrocatalysts. This design of hybrid catalysts will open up a promising avenue for highly efficient electrocatalysts by exerting the synergistic advantages of interface engineering at the atomic level.

中文翻译：

强电子耦合的FeNi3 / Fe2（MoO4）3纳米杂化物可增强氧释放反应的电催化活性

电催化水分解被认为是生产清洁氢能的可行策略。然而，操作过程中复杂且缓慢的氧气析出反应（OER）工艺极大地限制了其应用，因此开发廉价，高效的电催化剂非常重要。在这方面，通过简便的水热反应和随后的煅烧过程成功地合成了新型的FeNi ₃ / Fe ₂（MoO ₄）₃杂化电催化剂。受益于FeNi ₃和Fe ₂（MoO ₄）₃之间强大的电子耦合界面，Mo ⁶⁺的吸电子作用可以保持FeNi ₃的高价态活性位，从而有助于获得优异的OER性能。这种杂化复合材料显示出248mV的低过电势，实现了10mA cm ^-2的电流密度和令人满意的长期稳定性。优异的催化活性超过了大多数非贵金属电催化剂的报道。通过在原子水平上发挥界面工程的协同优势，这种杂化催化剂的设计将为高效电催化剂开辟一条有希望的途径。

更新日期：2020-07-28

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