不同气氛热处理对连续管道微波技术制备Pt/C催化剂氧还原性能的影响

doi:10.16085/j.issn.1000-6613.2023-0729

化工进展 ›› 2024, Vol. 43 ›› Issue (6): 3080-3092.DOI: 10.16085/j.issn.1000-6613.2023-0729

• 工业催化 • 上一篇

不同气氛热处理对连续管道微波技术制备Pt/C催化剂氧还原性能的影响

冯占雄¹(), 张创¹^,²(), 刘德政¹, 汪云¹, 马强¹, 王诚²()

^1.湖北文理学院智慧交通研究院，纯电动汽车动力系统设计与测试湖北省重点实验室，湖北襄阳 441000
^2.清华大学核能与新能源技术研究院，北京 100000

收稿日期:2023-05-04 修回日期:2023-08-28 出版日期:2024-06-15 发布日期:2024-07-02
通讯作者: 张创,王诚
作者简介:冯占雄（1995—），女，硕士研究生，研究方向为催化剂的制备及电化学。E-mail: zhanxiongfeng@hbuas.edu.cn。
基金资助:
国家重点研发计划(2021YFB3800400);“新能源汽车与智慧交通”湖北省优势特色学科群(TSXKQ003)

Effect of different atmosphere heat treatment on the oxygen reduction performance of Pt/C catalysts prepared by continuous pipeline microwave technology

FENG Zhanxiong¹(), ZHANG Chuang¹^,²(), LIU Dezheng¹, WANG Yun¹, MA Qiang¹, WANG Cheng²()

^1.Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle, Research Institute of Smart Transportation, Hubei University of Arts and Science, Xiangyang 441000, Hubei, China
^2.Institute of Nuclear Energy and New Energy Technology, Tsinghua University, Beijing 100000, China

Received:2023-05-04 Revised:2023-08-28 Online:2024-06-15 Published:2024-07-02
Contact: ZHANG Chuang, WANG Cheng

摘要/Abstract

摘要：

车用质子交换膜燃料电池作为解决能源危机和环境恶化问题的重要能源转换装置，成本高、阴极氧还原反应动力学慢和长时间运行阴极催化剂稳定性差等问题成为制约其发展的主要原因。为解决质子交换膜燃料电池阴极催化剂长期稳定性差的问题，运用连续管道微波制备技术，制备铂载量为50%（质量分数）的催化剂，并分别采用氮氢混合气（20%H₂）和空气两种不同气氛对Pt/C催化剂进行退火处理，通过表征和测试研究两种气氛热处理对其氧还原性能的影响。制备的Pt/C-300(20% H₂)催化剂30000圈衰减测试后仍能保持71.4m²/g和243mA/mg的高活性，实现了兼具高活性和高耐久性，为高氧还原性能催化剂的生产提供了一条有效可行的途径。

关键词: 燃料电池, 催化剂, 热处理, 衰减试验, 氧还原性能

Abstract:

Vehicle proton-exchange membrane fuel cell is an important energy conversion device to solve the energy crisis and environmental degradation issues. However, the high cost and slow cathodic oxygen reduction reaction kinetics and poor stability of cathode catalyst in long-term operation have become the main challenges in its development. As such, a continuous pipeline microwave preparation technology was used to prepare a catalyst with 50% (mass) platinum loading. The Pt/C catalyst was annealed in two different atmospheres, namely, nitrogen hydrogen mixture (20% H₂) and air. The effect of heat treatment in the two atmospheres on the oxygen reduction performance were studied through characterization and testing. The Pt/C-300 (20% H₂) catalyst can still maintain a high activity of 71.4 m²/g and 243mA/mg after 30000 cycles of attenuation testing, achieving both high activity and high durability. This work provides an effective and feasible way for the production of catalysts with high oxygen reduction performance.

Key words: fuel cells, catalyst, heat treatment, attenuation test, oxygen reduction performance

中图分类号:

TM911.4

冯占雄, 张创, 刘德政, 汪云, 马强, 王诚. 不同气氛热处理对连续管道微波技术制备Pt/C催化剂氧还原性能的影响[J]. 化工进展, 2024, 43(6): 3080-3092.

FENG Zhanxiong, ZHANG Chuang, LIU Dezheng, WANG Yun, MA Qiang, WANG Cheng. Effect of different atmosphere heat treatment on the oxygen reduction performance of Pt/C catalysts prepared by continuous pipeline microwave technology[J]. Chemical Industry and Engineering Progress, 2024, 43(6): 3080-3092.

图/表 16

表1 N2-H2(20% H2)气氛热处理50% Pt/C催化剂Pt含量测试

检测样品	检测元素	质量分数/%
Pt/C-200(20% H₂)	Pt	48.5
Pt/C-300(20% H₂)	Pt	47.3
Pt/C-400(20% H₂)	Pt	46.5

图1 循环测试前催化剂初始TEM图[N2-H2(20% H2)气氛]

图2 催化剂XRD谱图、N2吸附脱附等温曲线和XPS谱图[N2-H2(20% H2)气氛]

表2 空气气氛热处理50% Pt/C催化剂Pt含量测试

检测样品	检测元素	质量分数/%
Pt/C-200(Air)	Pt	49.2
Pt/C-300(Air)	Pt	48.7
Pt/C-400(Air)	Pt	48.1

图3 循环测试前催化剂初始TEM图（空气气氛）

图4 催化剂XRD谱图、N2吸附脱附等温曲线和XPS谱图（空气气氛）

图5 N2-H2(20% H2)气氛催化剂Pt衰减试验电化学测试（误差条表示4次独立测量的标准偏差）

图5 N2-H2(20% H2)气氛催化剂Pt衰减试验电化学测试（误差条表示4次独立测量的标准偏差）（续）

图6 N2-H2(20% H2)气氛催化剂30000圈Pt衰减实验后TEM图

图7 N2-H2(20% H2)气氛催化剂的碳载体衰减实验电化学测试（误差条表示4次独立测量的标准偏差）

图8 N2-H2(20% H2)气氛下催化剂30000圈碳载体衰减测试后TEM图

图9 空气气氛催化剂Pt衰减试验电化学测试（误差条表示4次独立测量的标准偏差）

图10 Pt/C-300(Air)催化剂30000圈衰减实验后TEM图

图11 空气气氛催化剂的碳载体衰减实验电化学测试（误差条表示4次独立测量的标准偏差）

图11 空气气氛催化剂的碳载体衰减实验电化学测试（误差条表示4次独立测量的标准偏差）（续）

图12 Pt/C、Pt/C-300(20% H2)、Pt/C-300(Air)和TKK-50%催化剂MEA测试图

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不同气氛热处理对连续管道微波技术制备Pt/C催化剂氧还原性能的影响

Effect of different atmosphere heat treatment on the oxygen reduction performance of Pt/C catalysts prepared by continuous pipeline microwave technology

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