Nanoporous Cobalt-Doped Fe3P for Boosted Electrochemical Nitrate Reduction

IF 3.9 3区化学 Q2 CHEMISTRY, PHYSICAL

ChemCatChem Pub Date : 2025-08-15 DOI:10.1002/cctc.202501002

Xiechen Zhang, Yanqin Liang, Hui Jiang, Zhaoyang Li, Zhonghui Gao, Shuilin Wu, Zhenduo Cui, Shengli Zhu, Wence Xu

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Abstract

Electrocatalytic nitrate reduction reaction (NO₃RR) offers a sustainable avenue for mitigating nitrate pollution and enabling decentralized ammonia production. However, achieving high efficiency and selectivity remains challenging due to the sluggish multielectron transfer kinetics. Herein, we report a nanoporous Co-Fe₃P catalyst featuring cobalt-doped iron phosphide frameworks that modulate the d band center, thereby optimizing intermediate binding and enhancing catalytic performance. The catalyst delivers a high ammonia yield rate of 24.56 mg h⁻¹ cm⁻² and a Faradaic efficiency of 91.45% at −0.4 V versus reversible hydrogen electrode (RHE) in alkaline media. In situ infrared spectroscopy identifies key intermediates, such as NH₂OH, NO₂⁻, and NH₂, indicative of an associative pathway. Furthermore, when integrated into a Zn–NO₃⁻ battery, the Co-Fe₃P cathode enables a high-power density of 15.83 mW cm⁻² with excellent Faradaic efficiency and cycling stability.

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纳米多孔钴掺杂Fe3P促进硝酸盐电化学还原

电催化硝酸还原反应（NO3RR）为减轻硝酸盐污染和分散氨生产提供了可持续的途径。然而，由于多电子传递动力学缓慢，实现高效率和选择性仍然具有挑战性。在此，我们报道了一种纳米多孔Co-Fe3P催化剂，该催化剂具有钴掺杂磷化铁框架，可以调节d带中心，从而优化中间结合并提高催化性能。与可逆氢电极（RHE）相比，该催化剂在碱性介质中具有24.56 mg h−1 cm−2的高氨产率和91.45%的法拉第效率。原位红外光谱识别关键中间体，如NH2OH， NO2 -和NH2，表明了一个结合途径。此外，当集成到Zn-NO3 -电池中时，Co-Fe3P阴极可以实现15.83 mW cm - 2的高功率密度，具有出色的法拉第效率和循环稳定性。

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来源期刊

ChemCatChem 化学-物理化学

CiteScore

8.10

自引率

4.40%

发文量

511

审稿时长

1.3 months

期刊介绍： With an impact factor of 4.495 (2018), ChemCatChem is one of the premier journals in the field of catalysis. The journal provides primary research papers and critical secondary information on heterogeneous, homogeneous and bio- and nanocatalysis. The journal is well placed to strengthen cross-communication within between these communities. Its authors and readers come from academia, the chemical industry, and government laboratories across the world. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies, and is supported by the German Catalysis Society.