应用化学 ›› 2022, Vol. 39 ›› Issue (3): 439-450.DOI: 10.19894/j.issn.1000-0518.210086

• 研究论文 • 上一篇    下一篇

磷化钼基催化剂的制备及其电解水中的应用

崔博洋, 武宏大, 余宗宝, 耿忠兴, 任铁强, 史春薇, 杨占旭()   

  1. 辽宁石油化工大学石油化工学院,抚顺 113001
  • 收稿日期:2021-03-01 接受日期:2021-06-23 出版日期:2022-03-01 发布日期:2022-03-15
  • 通讯作者: 杨占旭
  • 基金资助:
    国家自然科学基金(21671092);辽宁省“兴辽英才”创新领军人才项目(XLYC1802057);辽宁省-沈阳材料科学国家研究中心联合研发基金(2019010280-JH3/301);抚顺英才计划青年拔尖人才(FSYC202007001)

Preparation of Molybdenum Phosphide⁃based Catalyst and Its Application in Water Electrolysis

Bo-Yang CUI, Hong-Da WU, Zong-Bao YU, Zong-Xing GENG, Tie-Qiang REN, Chun-Wei SHI, Zhan-Xu YANG()   

  1. School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China
  • Received:2021-03-01 Accepted:2021-06-23 Published:2022-03-01 Online:2022-03-15
  • Contact: Zhan-Xu YANG
  • About author:zhanxuy@126.com
  • Supported by:
    the National Natural Science Foundation of China(21671092);Liaoning Provincial Science and Technology Innovation Leading Talent Project(XLYC1802057);the Joint Research Fund of Liaoning?Shenyang National Laboratory for Materials Science, China(2019010280?JH3/301);Fushun Youth Talents Project(FSYC202007001)

摘要:

以十二胺插层的正交三氧化钼为前驱体,次磷酸钠分解产生的PH3作为磷源,在限域的空间内通过原位碳化磷化法,合成了“N掺杂MoP/石墨”复合材料。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱分析(XPS)、拉曼光谱分析(Raman)和比表面积测试法(BET)等手段对700、800和900 ℃不同磷化温度所得催化剂样品进行微观结构及物理化学性质表征,并考察了其在电解水析氢反应(HER)中的催化性能。结果表明,十二胺分解一部分形成N掺杂的石墨作为导电架构,另一部分分解的氮掺杂磷化钼。800 ℃磷化样品具有最大的孔径比和电化学活性表面积,其表现出最佳的催化效果(过电势ηonset=111 mV,塔菲尔斜率b=70 mV/dec及27 h的优异稳定性),优于大多数报道的磷化钼催化剂。

关键词: 催化剂, 电解水, 制氢, 磷化钼

Abstract:

With dodecyl amine intercalated orthorhombic molybdenum trioxide as the precursor, PH3 was produced by decomposition of sodium hypophosphite as the phosphorus source, in a confined space by in-situ carbonization and phosphating method to synthesize “N-doped MoP/graphite” composite materials. The microstructure and physicochemical properties of the catalyst samples obtained at different phosphating temperatures of 700, 800 and 900 ℃ were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy (Raman), and specific surface area measurement (BET). The catalytic performance in the hydrogen evolution reaction (HER) of water was investigated. The results show that part of dodecyl amine decomposes to form N-doped graphite as the conductive structure, and the other part decomposes to form nitrogen-doped molybdenum phosphide. The 800 ℃ phosphating sample has the largest pore size ratio and electrochemically active surface area, and shows the best catalytic performance (overpotential ηonset=111 mV, Tafel slope b=70 mV/dec and excellent stability of 27 hours) which is better than those of most reported molybdenum phosphide catalysts.

Key words: Catalyst, Electrolyzed water, Hydrogen production, Molybdenum phosphide

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