汽车工程

汽车工程 ›› 2022, Vol. 44 ›› Issue (4): 560-566.doi: 10.19562/j.chinasae.qcgc.2022.04.011

所属专题： 新能源汽车技术-动力电池&燃料电池2022年

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基于WO3阵列的高效PEM电解水铱负载电极

姜广1,2,迟军1,姚德伟1,2,俞红梅1(),邵志刚1,刘聪3,尹立坤3,高学强3   

  1. 1.大连化学物理研究所，燃料电池系统科学与工程研究中心，大连 　116023
    2.中国科学院大学，北京 　100039
    3.中国长江三峡集团有限公司科学技术研究院，北京 　100038
  • 收稿日期:2021-10-27 修回日期:2021-12-14 出版日期:2022-04-25 发布日期:2022-04-22
  • 通讯作者: 俞红梅 E-mail:hmyu@dicp.ac.cn

Effective Ir Loaded Electrode Based on WO3 Array for PEM Water Electrolysis

Guang Jiang1,2,Jun Chi1,Dewei Yao1,2,Hongmei Yu1(),Zhigang Shao1,Cong Liu3,Likun Yin3,Xueqiang Gao3   

  1. 1.Fuel Cell System and Engineering Laboratory，Key Laboratory of Fuel Cells & Hybrid Power Sources，Dalian Institute of Chemical Physics，Dalian 　116023
    2.University of Chinese Academy of Sciences，Beijing 　100039
    3.Institute of Science and Technology，China Three Gorges Corporation，Beijing 　100038
  • Received:2021-10-27 Revised:2021-12-14 Online:2022-04-25 Published:2022-04-22
  • Contact: Hongmei Yu E-mail:hmyu@dicp.ac.cn

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摘要：

PEM电解水阳极面临高电位强氧化的环境，同时受限于金属铱的高昂价格，开发低成本、高活性与稳定性的析氧电极面临巨大挑战。本文通过操作简单的浸渍法在WO3阵列表面进行铱负载，得到的Ir@WO3电极在PEM电解水析氧电极中具有较高的活性与应用化价值。通过优化铱前驱体的浸渍量，当载量为0.15 mgIr·cm-2时，电极呈无序多孔结构，铱在电极表面均匀分布。单电解池测试膜电极2.0 V下性能达到2.3 A·cm-2，此时铱质量比活性提高至15.5 A·gIr-1，传质极化区域tafel斜率降低至360 mV·dec-1；相比商业化铱黑喷涂电极，WO3阵列载体的电极在提高催化剂质量活性与降低电极的传质极化方面具有优势。本研究提供的电极制备方法与性能研究思路对于发展低成本高活性PEM电解水膜电极具有一定的价值。

关键词: PEM电解水, 阳极催化剂, 有序化阵列, 浸渍

Abstract:

Anode electrode in proton exchange membrane （PEM） water electrolysis suffers a strongly oxidative environment under high cell voltage. At the same time， due to the high price of iridium， developing oxygen evolution electrode with low cost， high activity and stability is facing great challenges. In this paper， iridium catalyst is dispersed on WO3 nano-array by facile operation of impregnation method. The obtained Ir@WO3 electrode shows well activity and huge potential for application in PEM electrolytic water oxygen evolution electrode. By optimizing impregnation amount of iridium precursor， electrode exhibits disordered and porous structure with homogeneous Ir distribution at 0.15 mgIr·cm-2. The related membrane electrode exhibits a single-cell performance of 2.3 A·cm-2 at 2.0 V and tafel slope in mass transfer region of 360 mV·dec-1. This electrode reveals obvious advantages in improving Ir mass activity （15.5 A·gIr-1 at 2.0 V） and reducing mass transfer resistance， whose Ir mass activity is superior to sprayed Ir black electrode. The mentioned preparation method and structure design in this study have certain value to establish the low-cost and high activity PEM water electrolysis electrode.

Key words: PEM water electrolysis, anode catalyst, ordered array, immersion