Top-down and matchable interfacial engineering to construct hierarchical deformed NiS/NiCoP for hydrogen evolution reaction over a broad pH range
Top-down and matchable interfacial engineering to construct hierarchical deformed NiS/NiCoP for hydrogen evolution reaction over a broad pH range
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DOI：
10.1016/j.apsusc.2023.156896
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发表时间：
2023-03
影响因子：
6.7
通讯作者：
Xiaoyan Wang;Meng Cheng;Zihao Chen;Zhikun Wang;Chunling Li;Shuangqing Sun;Songqing Hu
中科院分区：
文献类型：
--
作者：
Xiaoyan Wang;Meng Cheng;Zihao Chen;Zhikun Wang;Chunling Li;Shuangqing Sun;Songqing Hu
优化水和氢中间体（H*）的吸附能和解离能对于改善宽pH范围内的析氢反应（HER）动力学至关重要。本文通过自顶向下的界面匹配工程方法，创新性地构建了分级变形NiS/NiCoP（d-NiCoSP）复合材料。这种独特的结构有利于原位硫离子选择性刻蚀和后续磷化。优化后的NiCoSP电催化剂在酸性、中性和碱性介质中分别具有60、95和71 mV（10 mA cm− 2）的超低HER过电位。H* 的显着降低可以归因于丰富的吸附位和有效的界面相互作用的内部暴露。此外，密度泛函理论（DFT）计算进一步证实了d-NiCoSP有利于HER的形成，因为它优化了NiCoP的电子富集和NiS的电子空位，使水和H* 更容易吸附和解离。值得注意的是，通过形态调节和具有互补优势的不同相的组合来构建有效的NiCoSP对于在宽pH范围内开发HER电催化剂是有希望的。
Optimizing adsorption and dissociation energies of water and hydrogen intermediate (H*) is crucial for improving hydrogen evolution reaction (HER) kinetics in a broad pH range. Herein, a hierarchical deformed NiS/NiCoP (d-NiCoSP) is innovatively constructviatop-down and matchable interfacial engineering. The unique structure benefit form in-situ sulfur ion selective etching and followed by phosphorization. The optimald-NiCoSP electrocatalyst exhibits the ultra-low overpotentials of 60, 95 and 71 mV at 10 mA cm−2for HER in acidic, neutral and alkaline media, respectively. The remarkable reduction of H* can be ascribed to the internal exposure of abundant adsorption sites and effective interfacial interaction. Besides, density functional theory (DFT) calculations further confirm thatd-NiCoSP is profitable for HER since optimized electronic enrichment in NiCoP and electronic vacancy in NiS at interface, resulting in easier adsorption and dissociation of water and H*. Notably, the construction of an effectived-NiCoSP through morphology regulation and combination of different phases with complementary advantages is promising for developing HER electrocatalysts over a broad pH range.