Ru/TiO2-P催化剂的制备及其电催化析氢性能
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文章编号： 1672-6987（2022）05-0036-07； DOI： 10.16351/j.1672-6987.2022.05.005
周士正， 秦清*， 刘希恩*， 唐林生(青岛科技大学 化工学院；生态化工国家重点实验室培育基地，山东 青岛 266042）
摘要： 采用一步低温水热法和后续磷化处理制备了Ru/TiO2-P催化剂。利用X-射线衍射（XRD）、透射电子显微镜（TEM）和X-射线光电子能谱（XPS）等手段对催化剂进行了表征。研究了该催化剂在05 mol·L-1 H2SO4溶液中的电催化析氢性能，达到10 mA·cm-2的电流密度时过电势仅为55 mV且经过2 000圈的循环伏安测试后催化活性没有衰减，表明其良好的电催化析氢活性和稳定性。这种优异的性能主要归因于两个方面：（1）磷化过程调控晶粒尺寸，形成更多的粒子间晶界，暴露更多的活性位点；（2）增磷反应后磷以PO3-4形式存在，其氧原子可作为H*吸附位点，增强了催化剂对H*中间体的吸附能力，从而提升催化剂活性。
关键词： 电催化； 析氢； 二氧化钛； 磷化； 三氯化钌
中图分类号： O 614文献标志码： A
引用格式：周士正， 秦清， 刘希恩， 等. Ru/TiO2-P催化剂的制备及其电催化析氢性能［J］. 青岛科技大学学报(自然科学版), 2022, 43(5): 36-42.
ZHOU Shizheng, QIN Qing, LIU Xien, et al. Preparation and hydrogen evolution performance of Ru/TiO2-P［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2022， 43（5）： 36-42.
Preparation and Hydrogen Evolution Performance of Ru/TiO2-P
ZHOU Shizheng, QIN Qing, LIU Xien, TANG Linsheng
(College of Chemical Engineering； State Key Laboratory Base of Eco-Chemical Engineering,
Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: Ru/TiO2-P as a highly active HER electrocatalyst was synthesized by one-step hydrothermal method under low temperature combining with subsequently phosphorization treatment. The catalyst was characterized by methods of X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The electrocatalytic hydrogen evolution reaction (HER) performance of Ru/TiO2-P was investigated in 0.5 mol·L-1 H2SO4 electrolyte, which exhibits high activity with a low overpotential of 55 mV at a current density of 10 mA·cm-2 as well as excellent stability. Two possible reasons are contributed to the high performance of Ru/TiO2-P catalyst: First, the size of the nanoparticles was tuned by the phosphorization, coupled with the formation of more inter-particle grain boundaries, which can expose more active sites; Second, there are PO3-4 existed in the catalyst after phosphorization and the oxygen in the PO3-4 groups can be served as the active sites for H* adsorption, which can enhance the capability to the adsorption of H*, and thus, improving the catalytic activity.
Key words: electrocatalysts; hydrogen evolution reaction; titanium dioxide; phosphorization; ruthenium trichloride
收稿日期： 2021-09-02
基金项目： 山东省自然科学基金项目(ZR2018BB008).
作者简介： 周士正(1991—),男,博士研究生.*通信联系人.
