Engineering Pt Nanoparticles with Fe and N Codoped Carbon to Boost Oxygen Reduction Catalytic Performance in Acidic Electrolyte
Engineering Pt Nanoparticles with Fe and N Codoped Carbon to Boost Oxygen Reduction Catalytic Performance in Acidic Electrolyte
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用 Fe 和 N 共掺杂碳设计 Pt 纳米粒子以提高酸性电解质中的氧还原催化性能
DOI：
10.1002/ente.202000393
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发表时间：
2020-09
影响因子：
3.8
通讯作者：
Xu Bo-Qing
中科院分区：
文献类型：
--
作者：
Xie Nan-Hong;Zhang Min;Xu Bo-Qing
虽然Pt基催化剂的高成本和缺乏长期稳定性一直阻碍其在燃料电池技术中的氧还原反应（ORR）中的实际应用，但铁和氮共掺杂的碳（Fe-N-C）似乎是稳定的，但不幸的是，在酸性电解质中活性较低的催化剂。本文报道了一种原位无表面活性剂的Pt沉积方法，用于在精心设计的Fe-N-C纳米结构上制备Pt纳米颗粒（NP），以产生用于酸性电解质中的ORR的高性能Pt/Fe-N-C催化剂。物理和电化学表征表明，Fe-N-C向Pt纳米粒子的电子转移减弱了O2在Pt表面的吸附，从而提高了Pt的本征ORR活性。在优化Pt负载时，Pt/Fe-N-C中Pt的固有和质量比活性数据分别在0.93 mA cm− 2和0.46 A mg−1-Pt时最大化，远高于商业Pt/C的数据（0.21 mA cm−2，0.19 A mg−1-Pt）。Pt/Fe-N-C催化剂在加速耐久性测试期间也显示出令人感兴趣的长期稳定性。指出了一种利用Pt和非贵金属ORR催化剂的优点的新途径，以获得更好的催化剂，从而在酸性电解质中实现ORR。
While high cost and lack of long‐term stability of Pt‐based catalysts have been impeding their practical application in oxygen reduction reaction (ORR) in fuel cell technologies, iron and nitrogen codoped carbons (Fe–N–C) are appearing to be stable but unfortunately less‐active catalysts in acidic electrolyte. Herein, an in situ surfactant‐free Pt deposition approach to fabricate Pt nanoparticles (NPs) onto well‐designed Fe–N–C nanostructures for producing highly performing Pt/Fe–N–C catalyst for ORR in acidic electrolyte is reported. Physical and electrochemical characterizations uncovered that electron transfer from Fe–N–C to their supported Pt NPs would weaken the adsorption of O2on the Pt surface, therefore improving the intrinsic activity of Pt for ORR. On optimizing the Pt loading, the intrinsic and mass‐specific activity data of Pt in Pt/Fe–N–C are maximized at ≈0.93 mA cm−2and 0.46 A mg−1‐Pt, respectively, much higher than those for commercial Pt/C (0.21 mA cm−2, 0.19 A mg−1‐Pt). The Pt/Fe–N–C catalyst also shows an intriguing long‐term stability during the accelerated durability test. A new avenue for taking the advantages of Pt and non‐noble metal ORR catalysts is pointed for achieving much better ones to accomplish ORR in acidic electrolyte.
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影响因子：
17.1
作者：
Guirong Zhang;Dan Zhao;Yuanyuan Feng;Bingsen Zhang;D. Su;Gang Liu;Bo-Qing Xu
通讯作者：
Guirong Zhang;Dan Zhao;Yuanyuan Feng;Bingsen Zhang;D. Su;Gang Liu;Bo-Qing Xu
影响因子：
12.9
作者：
Kong, Aiguo;Zhu, Xiaofang;Shan, Yongkui
通讯作者：
Shan, Yongkui
影响因子：
13.3
作者：
Li, Qing;Pan, Hengyu;Wu, Gang
通讯作者：
Wu, Gang
影响因子：
56.9
作者：
Chong, Lina;Wen, Jianguo;Liu, Di-Jia
通讯作者：
Liu, Di-Jia
影响因子：
15
作者：
Sa, Young Jin;Seo, Dong-Jun;Joo, Sang Hoon
通讯作者：
Joo, Sang Hoon