PtCo/CNTs-C纳米催化剂的制备及甲醇电催化氧化性能研究

白雪丽; 仇豪雷; 赵子龙; 刘煜成; 王峰; 张胜健; 张小平

doi:10.19906/j.cnki.JFCT.2023043

PtCo/CNTs-C纳米催化剂的制备及甲醇电催化氧化性能研究

doi: 10.19906/j.cnki.JFCT.2023043

白雪丽^{1, #,},
仇豪雷^{1, 2, #,},
赵子龙^{1, 2,},
刘煜成^{1, 2,},
王峰^1, ,,
张胜健^1,,
张小平^1,

1.
太原工业学院, 山西太原 0300081
2.
中北大学, 山西太原 030051

基金项目: 山西省高等学校科技创新计划(2022L555) 和山西省自然科学基金（202203021212333）资助

详细信息

通讯作者:
E-mail: 1037400468@qq.com

‡为共同一作
中图分类号: TQ116.2; TQ426; TB383.1
计量
- 文章访问数: 268
- HTML全文浏览量: 130
- PDF下载量: 28
- 被引次数: 0
出版历程
- 收稿日期: 2023-02-27
- 修回日期: 2023-05-08
- 录用日期: 2023-05-08
- 网络出版日期: 2023-05-17
- 刊出日期: 2023-09-30

Preparation of PtCo/CNTs-C nanocatalysts and electrocatalytic oxidation performance of methanol

BAI Xue-li^{1, #
,},
QIU Hao-lei^{1, 2, #
,},
ZHAO Zi-long^{1, 2
,},
LIU Yu-cheng^{1, 2
,},
WANG Feng^{1
, ,},
ZHANG Sheng-jian^1
,,
ZHANG Xiao-ping^1
,

1.
Taiyuan Institute of Technology, Taiyuan 030008, China
2.
North University of China, Taiyuan 030051, China

Funds: The project was supported by Project of Scientific and Technological Innovation Plan of Shanxi Institutions of Higher learning (2022L555) and Science and Natural Foundation of Shanxi Province (202203021212333)

摘要

摘要: 以碳纳米管(CNTs)和XC-72R炭黑混合材料为载体，采用浸渍还原法制备了具有较高的电化学活性的催化材料PtCo/CNTs-C。采用X射线衍射(XRD)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)对催化剂进行了结构表征。并将该材料用作了甲醇阳极氧化催化剂，考察了不同Co掺杂量以及温度对反应的影响。结果表明，PtCo/CNTs-C纳米催化剂中铂钴双金属形成合金，合金粒子在载体表面分布相对均匀。炭黑和金属Co的引入赋予了催化剂更高的催化活性。当Pt∶Co的质量比为94∶6时，催化剂对甲醇的催化氧化具有更低的起始电位(−0.651V(vs SCE))和更高的电流密度(86.74 mA/cm²)，且计时电流测试表明催化剂拥有良好的稳定性。
- 燃料电池 /
- 碳纳米管 /
- 炭黑 /
- PtCo /
- 甲醇氧化
Abstract: Using carbon nanotubes (CNTs) and XC-72R carbon black as the carrier, PtCo/CNTs-C catalyst with high electrochemical activity was prepared by impregnation reduction method. The structure of the catalyst was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The material was used as a catalyst for methanol anodic oxidation, and the effects of different Co doping and temperature on the reaction were investigated. The results showed that PtCo bimetallic alloy was formed in PtCo/CNTs-C nano-catalyst, and the alloy particles were relatively evenly distributed on the surface of the carrier. The introduction of carbon black and metal Co endowed the catalyst with higher catalytic activity. When the mass ratio of Pt∶Co was 94∶6, the catalyst had lower initial potential (−0.651 V (vs SCE)) and higher current density (86.74 mA/cm²) for the catalytic oxidation of methanol, and the chronoamperometric test showed that the catalyst had good stability.
- fuel cells /
- carbon nanotubes /
- carbon black /
- PtCo /
- methanol oxidation
注释:

1) ‡为共同一作

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图 1 Pt/CNTs、Pt/CNTs-C、PtCo/CNTs-C和PtCo/CNTs复合催化剂的XRD谱图

Figure 1 XRD pattems of Pt/CNTs、Pt/CNTs-C、PtCo/CNTs-C and PtCo/CNTs composite catalysts

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图 2 Pt/CNTs(a)、Pt/CNTs-C(b)和PtCo/CNTs-C(c)的TEM照片及PtCo/CNTs-C(d)和Pt/CNTs-C(e)的HRTEM照片

Figure 2 TEM images of Pt/CNTs (a), Pt/CNTs-C (b) and PtCo/CNTs-C (c) HRTEM images of PtCo/CNTs-C (d) and Pt/CNTs-C (e)

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图 3 PtCo/CNTs-C和Pt/CNTs-C催化剂的XPS谱图

Figure 3 XPS profiles of PtCo/CNTs-C and Pt/CNTs-C

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图 4 催化剂在PtNi/CNTs和Pt/CNTs和电化学阻抗谱图

Figure 4 Cyclic voltammetry (a) and electrochemical impedance spectra (b) of catalysts in 1.0 mol/L KOH-1.0 mol/L methanol solution

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图 5 催化剂在1.0 mol/L KOH-1.0 mol/L CH₃OH溶液中的循环伏安曲线(a)和电化学阻抗谱图(b)

Figure 5 Cyclic voltammetry (a) and electrochemical impedance spectra (b) of catalysts in 1.0 mol/L KOH-1.0 mol/L methanol solution

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图 6 催化剂在1.0 mol/L KOH/1.0 mol/L CH₃OH溶液中的线性扫描曲线

Figure 6 Linear sweep curves of catalyst in 1.0 mol/ L KOH/1.0 mol/L methanol solution

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图 7 催化剂在催化剂在1.0 mol/L KOH/1.0 mol/L CH₃OH溶液中的计时电流曲线

Figure 7 Chronoamperometric curve of catalyst in 1.0 mol/L KOH/1.0 mol/L methanol solution

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图 8 不同温度下PtCo/CNTs-C电催化氧化的循环伏安曲线

Figure 8 Cyclic voltammetry curves of PtCo/CNTs-C for electrocatalytic oxidation at different temperatures

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图 9 PtCo/CNTs-C不同扫描速率电催化氧化的循环伏安曲线(a)和I vs (V/s)^1/2(b)

Figure 9 Cyclic voltammetry curves of PtCo/CNTs-C for electrocatalytic oxidation at different scanning rates and I vs (V/s)^1/2(b)

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