协同金属-非金属共掺杂Ni3S2增强双功能水-尿素电解

IF 6.4 1区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Frontiers Pub Date : 2025-09-11 DOI:10.1039/d5qi01493j

Feng Fu, Min Wang, Yali Cao, Jili Ren, Zhen-Jiang Lu, Jing Xie, Rui Sheng, Jindou Hu

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引用次数: 0

摘要

追求经济实惠的双功能电催化剂，能够有效地促进析氧反应（OER）和尿素氧化反应（UOR），仍然面临着重大障碍。本文采用单步水热法将Fe和B共掺杂Ni3S2催化剂负载在泡沫镍（Fe,B-Ni3S2/NF）上。XPS和拉曼光谱证实了Fe和B在Ni3S2晶格中的有效结合。金属和非金属掺杂剂的协同作用调节了Ni3S2的电子构型，使其暴露出更多的活性位点，增强了电子相互作用，提高了电荷转移效率。优化后的催化剂表现出优异的催化活性，OER仅需1.494 V即可达到100 mA cm-2， UOR仅需1.326 V即可达到10 mA cm-2，且稳定性为260 h，衰减极小。这项研究为设计过渡金属硫化物的可持续混合水-尿素电解系统提供了一种直接的策略。

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Synergistic metal-nonmetal co-doping in Ni3S2 for enhanced bifunctional water-urea electrolysis

The pursuit of affordable bifunctional electrocatalysts capable of facilitating the oxygen evolution reaction (OER) and urea oxidation reaction (UOR) effectively still confronts significant hurdles. Herein, Fe and B co-doped Ni3S2 catalyst was supported on nickel foam (Fe,B-Ni3S2/NF) in a single-step hydrothermal way. XPS and Raman spectroscopy confirmed the effective incorporation of Fe and B into the Ni3S2 lattice. The concerted effect of the metal and non-metal dopants regulated the electronic configuration of Ni3S2 to expose more active sites, enhancing electronic interactions and improve the charge transfer efficiency. The optimized catalyst exhibited remarkable catalytic activity, which needed only 1.494 V for OER to achieve 100 mA cm-2 and a mere 1.326 V for UOR to attain 10 mA cm-2, and presented superb 260 h of stability with negligible decay. This research offers a straightforward tactic for devising transition metal sulfides for sustainable hybrid water-urea electrolysis systems.

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