NiMoP/C复合材料的制备及其电催化析氢性能

doi:10.3969/j.issn.1006-396X.2022.01.001

摘要/Abstract

摘要：

以四水合钼酸铵[(NH₄)₆Mo₇O₂₄ $?$ 4H₂O]为钼源、六水合硝酸镍[Ni(NO₃)₂ $?$ 6H₂O]为镍源、H₃PO₄为磷源，采用溶液凝胶法制备前驱体，然后通过化学气相沉积法制备了块状NiMoP/C复合材料。采用XRD、SEM、TEM、XPS、Raman和N₂?等温吸附脱附等测试技术，对NiMoP/C复合材料的物理化学性质进行了表征。同时通过CV、LSV、EIS等电化学测试手段，对NiMoP/C复合材料进行了电催化析氢性能测试。结果表明，NiMoP/C复合材料达到电流密度为-10 mA/cm²时的过电位为-158 mV，Tafel斜率为111 mV/dec，具有较高的电催化析氢活性和稳定性。由于没有任何复杂的电极制备过程，制备的NiMoP/C材料是一种较好的适用于酸性介质中电解水的阳极材料。

关键词: NiMoP/C, 过渡金属, 电催化, 析氢反应

Abstract:

The precursor was prepared by sol?gel method using ammonium molydate tetrahydrate [(NH₄)₆Mo₇O₂₄·4H₂O] as molybdenum source,nickle nitrate hexahydrate [Ni(NO₃)₂·6H₂O] as nickel source and H₃PO₄ as phosphorus source.NiMoP/C composites were then prepared by a following CVD (chemical vapor deposition) method.The physical and chemical properties of NiMoP/C composites were characterized by XRD,SEM,TEM,XPS,Raman,N₂?adsorption desorption and other test techniques. Meanwhile,the electrocatalytic hydrogen evolution performance of the NiMoP/C composite material was measured by CV,LSV, EIS,etc.The results show that the NiMoP/C composite material has high electrocatalytic hydrogen evolution performance with overpotential of -158 mV at the current density of -10 mA/cm² and Tafel slope of 111 mV/dec. So the NiMoP/C material is an excellent anode material suitable for electrolyzing water in acidic media due to its simply electrode preparation process preparation method.

Key words: NiMoP/C, Transition metal, Electrocatalysis, Hydrogen evolution reaction

中图分类号:

O646

宋楗, 韩乔, 杨占旭. NiMoP/C复合材料的制备及其电催化析氢性能[J]. 石油化工高等学校学报, 2022, 35(1): 1-9.

Jian Song, Qiao Han, Zhanxu Yang. Preparation of NiMoP/C Composite Material and Electrocatalytic Hydrogen Evolution Performance[J]. Journal of Petrochemical Universities, 2022, 35(1): 1-9.

图/表 10

图1 NiMoP/C、MoP/C、Ni2P/C材料的XRD图谱

Fig.1 XRD patterns of NiMoP/C，MoP/C和Ni2P/C

图2 Ni2P/C、MoP/C、NiMoP/C的SEM、TEM和HRTEM注：（a-f） Ni2P/C、MoP/C、NiMoP/C不同倍率下的SEM;（g-l）Ni2P/C、MoP/C、NiMoP/C的TEM和HRTEM

Fig.2 SEM,TEM and HRTEM images of Ni2P/C,MoP/C and NiMoP/C

图3 Ni2P/C、MoP/C、NiMoP/C的EDS能谱注：(a-d) Ni2P/C；(e-h) MoP/C；(i-m) NiMoP/C

Fig.3 EDS energy spectrum of Ni2P/C, MoP/C,NiMoP/C

图4 催化剂的XPS谱图

Fig.4 Fitted XPS spectra for as?prepared catalysts

图5 催化剂的Raman谱图

Fig.5 Raman spectra for as?prepared catalysts

图6 催化剂的N2吸附?脱附等温线和孔径分布

Fig.6 Nitrogen adsorption?desorption isotherms and pore size distribution for as?prepared catalysts

图7 催化剂电催化HER的相关数据对比

Fig.7 Data and graphs related to as-prepared catalysts for electrocatalytic HER

图8 催化剂的电化学阻抗谱

Fig.8 Nyquist images for as?prepared catalysts

图9 催化剂在不同扫描速率下的双电层电容

Fig.9 Cdl of different scan rates for as prepared catalysis

图10 催化剂在1 000圈扫描前后的极化曲线和计时电位测试曲线（a）极化曲线（b）计时电位测试曲线

Fig.10 LSV curves for as?prepared catalysts before and after 1 000 cycles and chronopotential test curves

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