Construction of bimetallic phosphide nanostructures with in situ growth, reduction, and phosphidation of ultra-thin graphene layers as highly efficient catalysts towards the OER.
Construction of bimetallic phosphide nanostructures with in situ growth, reduction, and phosphidation of ultra-thin graphene layers as highly efficient catalysts towards the OER.
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DOI：
10.1039/d3dt03143h
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发表时间：
2023-12
影响因子：
4
通讯作者：
Dengxia Zhu;Huiting Bi;Chaolong Wang;Zheng Zhang;Junjiang Zhu
中科院分区：
文献类型：
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作者：
Dengxia Zhu;Huiting Bi;Chaolong Wang;Zheng Zhang;Junjiang Zhu
我们提出了一种在超薄石墨烯上原位生长双金属硅酸盐的新方法，然后进行原位还原和磷化，以获得在石墨烯层上均匀分散的双金属磷化物（rGO@FeNiP/rGO@FeCoP）。与传统的单金属磷化物和碳材料的简单复合材料不同，通过原位生长、还原、磷化和碱处理获得的rGO@FeNiP/rGO@FeCoP的双金属协同表现出更大的表面积、更多的纳米孔和缺陷以及更多的活性位点，有利于电解质扩散和气体释放，加速电子转移并增强电催化析氧反应（OER）性能。此外，FeNiP/FeCoP 周围的连续碳层结构提供了结构支撑，提高了催化剂稳定性。我们研究了不同比例的双金属对电催化性能的影响，为碳基双金属磷化物作为有前景的OER电催化剂提供了合理的设计和合成策略。
We present a novel approach for the in situ growth of bimetallic silicate onto ultrathin graphene, followed by in situ reduction and phosphorization to obtain uniformly dispersed bimetallic phosphides (rGO@FeNiP/rGO@FeCoP) on graphene layers. Unlike the traditional simple composites of single-metallic phosphides and carbon materials, the bimetallic synergy of rGO@FeNiP/rGO@FeCoP obtained through in situ growth, reduction, phosphorization, and alkaline treatment exhibits a large surface area, more nanopores and defects, and more active sites, facilitates electrolyte diffusion and gas release, accelerates electron transfer and enhances electrocatalytic oxygen evolution reaction (OER) performance. Furthermore, the continuous carbon layer architecture surrounding FeNiP/FeCoP provides structural support, improving catalyst stability. We have investigated the effect of different proportions of bimetals on electrocatalytic performance, providing a rational design and synthesis strategy for carbon-based bimetallic phosphides as a promising electrocatalyst for the OER.