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Bimetallic NiCoP catalysts anchored on phosphorus-doped lignin-based carbon for robust oxygen evolution performance

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Abstract

Oxygen evolution reaction (OER) catalysts are the key core materials that determine the performance of fuel cells, metal-air batteries, electrolytic water decomposition, and other applications. In this work, a green lignin-based non-precious metal OER catalyst was prepared by a simple strategy. Firstly, carboxylated lignin was used to complex Ni and Co in situ, and then they were placed with sodium hypophosphite in the same tube furnace for upstream and downstream high-temperature calcination to construct a lignin carbon-based Ni–Co bimetallic OER catalyst (NiCoP@C). The synthesized catalyst is a porous bimetallic phosphide with a three-dimensional network structure and high-density electrochemical active sites. NiCoP@C exhibited favorable catalytic activity for the oxygen evolution reaction (OER) with overpotential of 280 mV at 10 mA·cm−2 and a Tafel slope of 77 mV·dec−1. Additionally, it exhibited remarkable durability during usage. Density functional theory (DFT) calculations revealed that by leveraging the distinctive structure of transition metal phosphide nanoparticles incorporated into a reticulated substrate, the NiCoP@C catalyst offered an increased number of active sites for OER catalysis, significantly enhancing its stability during practical applications. The present study broadens the utilization pathways of biomass to “turn waste into treasure,” aligning the development concept of green sustainable development.

Graphical Abstract

摘要

析氧反应催化剂是决定燃料电池、金属空气电池、电解水分解等应用性能的关键核心材料。本研究采用简单的策略制备了一种绿色木质素基非贵金属 OER 催化剂。首先用羧化木质素原位络合镍和钴, 然后将它们与次磷酸钠置于同一管式炉中进行上下游高温煅烧, 构建了木质素碳基镍钴双金属 OER 催化剂 (NiCoP@C) 。合成的催化剂是一种多孔双金属磷化物, 具有三维网络结构和高密度的电化学活性位点。NiCoP@C 在氧进化反应 (OER) 中表现出良好的催化活性, 在 10 mA·cm−2 条件下过电位为 280 mV, Tafel 斜率为 77 mV·dec−1。此外, 该催化剂表现出显著的耐久性。密度泛函理论计算显示, 通过利用过渡金属磷化纳米颗粒与网状基底的独特结构, NiCoP@C 催化剂为 OER 催化提供了更多的活性位点, 显著提高了其在实际应用中的稳定性。本研究拓宽了生物质 "变废为宝 "的利用途径, 展现出绿色可持续发展的发展理念。

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (No. 22278092), the Science and Technology Research Project of Guangzhou (Nos. 2023A03J0034, 2023A04J0077 and 202201000002), the State Key Laboratory of Pulp and Paper Engineering (No. 202313) and the Key Discipline of Materials Science and Engineering, Bureau of Education of Guangzhou (No. 202255464).

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Authors and Affiliations

  1. Guangdong Engineering Technology Research Center for Sensing Materials & Devices, Guangzhou Key Laboratory of Sensing Materials & Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China

    Ling-Ying-Zi Xiong, Lei Du & Huan Wang

  2. Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, 515200, China

    Bo-Wen Liu, Xu-Liang Lin & Huan Wang

  3. State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China

    Xu-Liang Lin & Huan Wang

  4. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China

    Ling-Ying-Zi Xiong

  5. Sustainable Energy and Environment Thrust, Function Hub, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou, 511400, China

    Yue-Kuan Zhou

  6. Division of Emerging Interdisciplinary Areas, Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, 999077, China

    Yue-Kuan Zhou

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Xiong, LYZ., Liu, BW., Du, L. et al. Bimetallic NiCoP catalysts anchored on phosphorus-doped lignin-based carbon for robust oxygen evolution performance. Rare Met. 43, 3084–3095 (2024). https://doi.org/10.1007/s12598-024-02718-5

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