首页|A facile and green strategy for mass production of dispersive FeCo-rich phosphides@N,P-doped carbon electrocatalysts toward efficient and stable rechargeable Zn-air battery and water splitting

A facile and green strategy for mass production of dispersive FeCo-rich phosphides@N,P-doped carbon electrocatalysts toward efficient and stable rechargeable Zn-air battery and water splitting

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One key step for advancing the widespread practical application of rechargeable metal-air batteries and water electrolysis fundamentally relies on the development of cost-effective multifunctional electrocata-lysts toward oxygen and hydrogen-involving reactions.The present work initiates a tofu-derived one-pot strategy for green,facile,and mass production of highly active and stable catalyst toward oxygen reduc-tion/evolution and hydrogen evolution reactions,through the preparation of Fe/Co cross-linked tofu gel and the subsequent pyrolysis.Despite the free use of additional N/P precursors or pore-forming agents,the as-prepared materials comprise highly dispersive FeCo-rich phosphides nanoparticles and porous N,P co-doped carbon network inherited from the tofu skeleton.The resultant catalysts exhibit remarkably enhanced trifunctional activities as compared to the Fe2P and Co2P counterparts,along with better long-term stabilities than the benchmark RuO2 and Pt/C catalysts.Accordingly,the as-assembled Zn-air battery delivers a large power density(174 mW cm-2)with excellent cycle stability(the gap of charge/discharge voltage@10 mA cm-2 increases by 0.01 V after 720 h of operation,vs.0.16 V of Pt/C-RuO2 based battery after 378 h).Furthermore,the as-constructed alkaline electrolyzer just requires a small voltage of 1.55 V@10 mA cm-2,which outperforms nearly all of those of biomass-derived electrocatalysts ever reported,and that of noble metal catalysts-based electrolyzers(1.72 V@10 mA cm-2 for Pt/C-RuO2),underscoring their bright future toward commercial applications in green energy conversion devices.

SoybeanPhosphidesElectrocatalysisOverall water splittingZn-air battery

Bo Wang、Qiao Liu、Ao Yuan、Qing Shi、Lan Jiang、Weiyou Yang、Tao Yang、Xinmei Hou

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Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China

Institute of Micro/Nano Materials and Devices,Ningbo University of Technology,Ningbo 315211,China

国家杰出青年科学基金国家自然科学基金国家自然科学基金Zhejiang Provincial Nature Science FoundationInterdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities)

520250415170217651974021LY20E020009FRF-IDRY-21-028

2024

10.1016/j.jmst.2023.08.073

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.182(15)
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