Refined Ni, Co-induced synthesis of NiCoP nanoparticles uniformly embedded in NCNTs: A robust dual-functional electrocatalyst for water splitting

Q3 Energy

燃料化学学报 Pub Date : 2024-08-01 DOI:10.1016/S1872-5813(24)60446-9

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Abstract

Ni, Co-induced highly distributed NiCoP nanoparticles embedded nitrogen-doped carbon nanotubes (NCNTs) (NiCo/NiCoP-NCNTs) were directly synthesized by a one-step phosphorization and carbonization process. As a bifunctional electrocatalyst for water splitting, NiCo/NiCoP NCNTs show impressive catalytic performance with an overpotential of only 206 mV for the hydrogen evolution reaction and 360 mV for the oxygen evolution reaction in 0.5 mol/L H₂SO₄ and 1 mol/L KOH solutions, respectively. In addition, NiCo/NiCoP NCNTs maintain a stable cell voltage of 1.68 V at 10 mA/cm² with only a 10% decrease in current density over 48 h, showing remarkable stability. The improved catalytic activity can be attributed to the integration of NiCoP nanoparticles and the synergies between NCNTs and NiCo alloy. Additionally, the improved electrocatalytic performance can be attributed to the increased electrochemically active surface area and the reduced electron transfer resistance of the NiCo/NiCoP-NCNTs. Overall, the NiCo/NiCoP-NCNTs demonstrated significant performance for advanced water electrolysis applications.

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精炼镍，共诱导合成均匀嵌入 NCNT 的 NiCoP 纳米粒子：一种稳定的双功能水分离电催化剂

通过一步磷化和碳化工艺直接合成了嵌入氮掺杂碳纳米管（NCNTs）的高分布镍钴磷纳米粒子（NiCo/NiCoP-NCNTs）。作为一种双功能水分离电催化剂，NiCo/NiCoP NCNTs 表现出令人印象深刻的催化性能，在 0.5 mol/L H2SO4 和 1 mol/L KOH 溶液中，氢进化反应的过电位仅为 206 mV，氧进化反应的过电位为 360 mV。此外，镍钴/镍钴磷 NCNT 在 10 mA/cm2 的条件下可保持 1.68 V 的稳定电池电压，48 小时内电流密度仅下降 10%，显示出显著的稳定性。催化活性的提高可归因于镍钴磷纳米颗粒的整合以及 NCNTs 和镍钴合金之间的协同作用。此外，NiCo/NiCoP-NCNTs 电化学活性表面积的增加和电子传递电阻的降低也提高了电催化性能。总之，NiCo/NiCoP-NCNTs 在先进的水电解应用中表现出了显著的性能。

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来源期刊

燃料化学学报 Chemical Engineering-Chemical Engineering (all)

CiteScore

2.80

自引率

0.00%

发文量

5825

期刊介绍： Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.

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