Co-Fe-Pd纳米粒子的可控制备及其氧还原催化性能

王婵娜; 刘令; 王慧华; 屈天鹏; 田俊; 王德永; 康振辉

doi:10.11949/j.issn.0438-1157.20180717

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Co-Fe-Pd纳米粒子的可控制备及其氧还原催化性能

材料化学工程与纳米技术 | 更新时间：2020-06-24

- Co-Fe-Pd纳米粒子的可控制备及其氧还原催化性能
- Controllable preparation of Co-Fe-Pd nanoparticles and their catalytic activities toward oxygen reduction
- 化工学报 2019年70卷第1期页码：319-326
- 作者机构：
  
  1.苏州大学沙钢钢铁学院，江苏苏州 215021
  2.苏州大学纳米科学技术学院，江苏苏州 215021
- 作者简介：
  
  王婵娜（1994—），女，硕士研究生，18297112628@163.com
  王慧华（1976—），女，博士后，副教授，hhwang@suda.edu.cn
- 基金信息：
  
  国家自然科学基金项目(51604179;51674172;51774208;51704200)
- DOI：10.11949/j.issn.0438-1157.20180717
  中图分类号： TM 911
- 收稿：2018-07-02，
  
  修回：2018-09-07，
  
  纸质出版：2019-01-05
- 稿件说明：
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王婵娜, 刘令, 王慧华, 屈天鹏, 田俊, 王德永, 康振辉. Co-Fe-Pd纳米粒子的可控制备及其氧还原催化性能[J]. 化工学报, 2019, 70(1): 319-326

WANG Channa, LIU Ling, WANG Huihua, QU Tianpeng, TIAN Jun, WANG Deyong, KANG Zhenhui. Controllable preparation of Co-Fe-Pd nanoparticles and their catalytic activities toward oxygen reduction[J]. CIESC Journal, 2019, 70(1): 319-326
王婵娜, 刘令, 王慧华, 屈天鹏, 田俊, 王德永, 康振辉. Co-Fe-Pd纳米粒子的可控制备及其氧还原催化性能[J]. 化工学报, 2019, 70(1): 319-326 DOI： 10.11949/j.issn.0438-1157.20180717.

WANG Channa, LIU Ling, WANG Huihua, QU Tianpeng, TIAN Jun, WANG Deyong, KANG Zhenhui. Controllable preparation of Co-Fe-Pd nanoparticles and their catalytic activities toward oxygen reduction[J]. CIESC Journal, 2019, 70(1): 319-326 DOI： 10.11949/j.issn.0438-1157.20180717.

摘要

以Co(COOH)

、FeCl

和PdCl

为原料，柠檬酸为稳定剂，乙醇为加速剂，采用超声辅助制备Co-Fe-Pd金属纳米粒子，并评估其氧还原反应(ORR)电催化性能。研究结果表明，Co-Fe-Pd金属纳米粒子平均粒径约3～5 nm，由于Co、Fe固溶于Pd晶格，使Co-Pd、Fe-Pd和Co-Fe-Pd纳米粒子仅显示Pd衍射峰，且伴有不同程度的宽化；相比于Co-Fe、Fe-Pd或Co-Pd纳米粒子，三元Co-Fe-Pd晶格压缩更为明显，晶格缺陷诱使的活性位点增加，氧还原催化能力增强；其氧还原起峰电位为1.03 V(

RHE)，Tafel斜率为-87 mV/dec

可与商用Pt/C催化剂相媲美；氧还原过程中电子转移数为3.80±0.04，说明其主导四电子转移路径；此外，RRDE结果显示氧还原过程中的中间产物H

含量约10%。

Abstract

Co(FeOH)

FeCl

and PdCl

were used as raw materials

citric acid was used as stabilizer

and ethanol was used as accelerator. Ultrasonic-assisted preparation of Co-Fe-Pd metal nanoparticles was carried out

and the oxygen reduction reaction (ORR) electrocatalytic performance was evaluated. The results show that the average size of Co-Fe-Pd nanoparticles prepared by ultrasonic method is about 3—5 nm

and only Pd diffraction peaks are detected for the Co-Pd，Fe-Pd and Co-Fe-Pd nanoparticles because of the dissolution of Co and Fe into the Pd lattice. Compared to Co

Co-Fe Fe-Pd and Co-Pd nanoparticles

the lattice contraction of Co-Fe-Pd nanoparticles exhibited as the wide peaks is remarkable

which leads to increasing lattice defects and subsequent enhanced catalytic activities. The onset potential of oxygen reduction and the slop of Tafel for the Co-Fe-Pd nanoparticles are 1.03 V(

RHE) and -87 mV/dec

respectively. The values obtained here are comparable to those of commercial Pt/C catalyst. The transferred electron-number of Co-Fe-Pd nanoparticles is 3.80±0.04 during the oxygen reduction

which is dominated by a four-electron pathway. Furthermore

the peroxide percentage (H

) is about 10% from the results of RRDE.

关键词

Keywords

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