Preparation of NiMoP/C Composite Material and Electrocatalytic Hydrogen Evolution Performance

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

Abstract

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

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

CLC Number:

O646

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.

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.

Figures/Tables 10

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

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

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

Fig.4 Fitted XPS spectra for as?prepared catalysts

Fig.5 Raman spectra for as?prepared catalysts

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

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

Fig.8 Nyquist images for as?prepared catalysts

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

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

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