Chemical Industry and Engineering Progress ›› 2024, Vol. 43 ›› Issue (12): 6760-6768.DOI: 10.16085/j.issn.1000-6613.2023-2055

• Industrial catalysis • Previous Articles    

Preparation of TiO2 based two-phase composite and its electrocatalytic hydrogen evolution performance

ZHAO Wenxiao1,2(), PEI Liujun1,2, JIA Weike1,2, WANG Jiping1,2()   

  1. 1.School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
    2.Shanghai Engineering Research Center for Clean Production of Textile Chemistry, Shanghai 201620, China
  • Received:2023-11-24 Revised:2024-01-17 Online:2025-01-11 Published:2024-12-15
  • Contact: WANG Jiping

TiO2基两相复合材料的制备及其电催化析氢性能

赵文潇1,2(), 裴刘军1,2, 贾伟科1,2, 王际平1,2()   

  1. 1.上海工程技术大学纺织服装学院,上海 201620
    2.上海纺织化学清洁生产工程技术研究中心,上海 201620
  • 通讯作者: 王际平
  • 作者简介:赵文潇(1998—),女,硕士研究生,研究方向为TiO2电催化。E-mail:xxrubyjane@163.com
  • 基金资助:
    国家自然科学基金(22072089);安徽省重点研发项目(2023t07020001);浙江省清洁染整技术研究重点实验室开放基金(QJRZ2301);海宁市科技计划工业、农业项目(2021003)

Abstract:

As an inexpensive and widely used metal oxide, TiO2 with improved catalytic activity after processing and modification can be used in electrocatalysis field. In this paper, a hydrophilic anatase TiO2 with hierarchical flower-like structure was prepared and loaded with PdCu NPs on its surface. The obtained two-phase composite nanomaterial PdCu NPs@TiO2 had a large specific surface area and abundant active sites. The samples with different compositions of 5%, 10% and 20% PdCu NPs@TiO2 were characterised by SEM, TEM, XRD, XPS and BET, and the activity changes of electrocatalytic hydrogen precipitation were evaluated using electrochemical tests. The results showed that the prepared Pd2Cu NPs@TiO2-10 (Pd∶Cu=2∶1) HER electrocatalyst performed the best with low water adsorption/dissociation and H intermediate desorption energy barriers. It had a low overpotential of 35.8mV and a low Tafel slope of 46.3mV/dec at current density up to 10mA/cm2 under acidic condition.

Key words: titanium dioxide, palladium copper alloy particles, catalyst, hydrogen production, composites

摘要:

TiO2作为一种价格低廉、应用广泛的金属氧化物,加工改性后提高其催化活性,可广泛应用于电催化领域。本文制备了一种亲水性锐钛矿型TiO2多级花状结构,在其表面负载PdCu NPs,所得PdCu NPs@TiO2两相复合纳米材料具有更大的比表面积和更多的活性位点。通过扫描电子显微镜、透射电子显微镜、X射线衍射仪、X射线光电子能谱及BET分析等手段对PbCu NPs质量分数为5%、10%和20%的PdCu NPs@TiO2样品进行表征,并利用电化学测试观察其催化活性的变化。结果表明,所制备的Pd2Cu NPs@TiO2-10(Pd与Cu之比为2∶1)两相复合纳米材料作为析氢反应(HER)电催化剂性能最优,具有较低的水吸附/解离能垒和H中间体脱附能垒。在酸性条件下电流密度达到10mA/cm2时具有35.8mV的低过电位,46.3mV/dec的低Tafel斜率,表现出优异的电催化活性。

关键词: 二氧化钛, 钯铜合金颗粒, 催化剂, 制氢, 复合材料

CLC Number: 

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