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氮掺杂碳原位锚定铜纳米颗粒用于高效氧还原反应催化剂

  • 袁会芳 ,
  • 张越 ,
  • 翟兴吾 ,
  • 胡立兵 ,
  • 葛桂贤 ,
  • 王刚 ,
  • 于锋 ,
  • 代斌
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  • 1.石河子大学化学化工学院,新疆兵团绿色化工过程重点实验室,新疆 石河子 832003
    2.石河子大学理学院,新疆 石河子 832003
    3.石河子大学兵团工业技术研究院,清洁能源转化与储存研究组,新疆 石河子 832003
第一联系人:

#两位作者对此文章贡献相同。

db_tea@shzu.edu.cn
* Tel: (86-993)2057272, E-mail: yufeng05@mail.ipc.ac.cn;

收稿日期: 2020-07-24

  修回日期: 2021-02-18

  网络出版日期: 2021-02-22

基金资助

国家自然科学基金项目(21865025);国家自然科学基金项目(51962032)

Copper Nanoparticles In-Situ Anchored on Nitrogen-Doped Carbon for High-Efficiency Oxygen Reduction Reaction Electrocatalyst

  • Hui-Fang Yuan ,
  • Yue Zhang ,
  • Xing-Wu Zhai ,
  • Li-Bing Hu ,
  • Gui-Xian Ge ,
  • Gang Wang ,
  • Feng Yu ,
  • Bin Dai
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  • 1. Key Laboratory of Green Chemical Process of Xinjiang Corps, College of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
    2. School of Science, Shihezi University, Shihezi 832003, Xinjiang, China
    3. Shihezi University Bingtuan Industrial Technology Research Institute Clean Energy Conversion and Storage Research Group, Shihezi 832003, Xinjiang, China

Received date: 2020-07-24

  Revised date: 2021-02-18

  Online published: 2021-02-22

摘要

与贵金属铂基电化学氧还原反应(ORR)催化剂相比,廉价的非贵金属催化剂引起了广泛的关注。本文以壳聚糖作为一种富含氮和碳元素的生物质资源,利用碳浴法成功制备了氮掺杂碳原位负载铜纳米颗粒(Cu/N-C)催化剂。纯壳聚糖碳化得到的样品N-C的比表面积为67.5 m2·g-1、平均孔径0.14 nm、平均孔体积8.00 m2·g-1,与之相比,Cu/N-C比表面积可达607.3 m2·g-1、平均孔径为2.5 nm、平均孔体积为0.40 cm3·g-1。通过密度泛函理论(DFT)进行计算表明,Cu(111)/N-C的自由能值低于N-C,更有利于氧还原催化进行。在0.1 mol·L-1 KOH的介质中,Cu/N-C不仅表现出优异的起始和半波电势(分别为0.96 V和0.84 V),而且还表现出了优异的抗甲醇性能和稳定性,并且Cu元素掺杂量达到1.67wt.%。

本文引用格式

袁会芳 , 张越 , 翟兴吾 , 胡立兵 , 葛桂贤 , 王刚 , 于锋 , 代斌 . 氮掺杂碳原位锚定铜纳米颗粒用于高效氧还原反应催化剂[J]. 电化学, 2021 , 27(6) : 671 -680 . DOI: 10.13208/j.electrochem.200724

Abstract

Compared with noble metal platinum (Pt)-based catalysts, inexpensive non-noble metal electrocatalysts have attracted extensive attention for oxygen reduction reaction (ORR). Herein, chitosan as a kind of biomass resource rich in nitrogen and carbon was used to prepare nitrogen-doped carbon (N-C) and N-C in-situ anchored by copper nanoparticles (Cu/N-C). The as-obtained N-C and Cu/N-C nanoparticles were successfully used as non-noble eletrocatalysts tested for ORR. Compared with the N-C, the Cu/N-C showed the high surface area of 607.3 m 2·g-1 with the mean pore size of 2.5 nm and the pore volume of 0.40 cm3·g-1. The most positive Gibbs free energy change was the rate determining step for ORR process with the 4e mechanism, where the value of the Cu(111)/N-C(-0.39 eV) was lower than that of the N-C(-0.26 eV). The Cu/N-C exhibited superior onset and half-wave potentials (0.96 V and 0.84 V, respectively) in alkaline media(0.1 mol·L-1 KOH), all of which are much better than those measured for N-C and commercial Pt/C. Furthermore, the Cu/N-C showed superior methanol crossover avoidance and oxygen reduction stability.

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