当前位置：
X-MOL 学术
›
Catal. Sci. Technol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Cobalt nanoparticles incorporated into hollow doped porous carbon capsules as a highly efficient oxygen reduction electrocatalyst†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-09-10 00:00:00 , DOI: 10.1039/c8cy01371c Feng Guo 1, 2, 3, 4, 5 , Hui Yang 6, 7, 8, 9 , Briana Aguila 6, 7, 8, 9 , Abdullah M. Al-Enizi 10, 11, 12, 13, 14 , Ayman Nafady 10, 11, 12, 13, 14 , Mandeep Singh 15, 16, 17, 18, 19 , Vipul Bansal 15, 16, 17, 18, 19 , Shengqian Ma 6, 7, 8, 9, 10
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-09-10 00:00:00 , DOI: 10.1039/c8cy01371c Feng Guo 1, 2, 3, 4, 5 , Hui Yang 6, 7, 8, 9 , Briana Aguila 6, 7, 8, 9 , Abdullah M. Al-Enizi 10, 11, 12, 13, 14 , Ayman Nafady 10, 11, 12, 13, 14 , Mandeep Singh 15, 16, 17, 18, 19 , Vipul Bansal 15, 16, 17, 18, 19 , Shengqian Ma 6, 7, 8, 9, 10
Affiliation
|
Platinum-based materials have been the dominant and best electrocatalysts for promoting the oxygen reduction reaction (ORR). However, going beyond state-of-the-art catalysts remains a great challenge. Recently, nanostructured composites of conductive carbons and earth-abundant metals have emerged as promising electrocatalysts. Herein, we report a facile and practical approach for the synthesis of cobalt nanoparticles embedded into hollow nitrogen/cobalt-doped porous carbon capsules (Co@NPCC). The fabrication of this material was achieved via the thermal decomposition of sacrificial metal–organic framework nanocrystals coated with a metal–tannic acid coordination polymer shell, upon pyrolysis, which delivers zerovalent cobalt nanoparticles embedded in the walls of hollow capsules. Co@NPCC proved to be a superb catalyst for the electrochemical ORR, showing a highly positive onset potential (∼1.02 V vs. RHE) and current density (∼5.2 mA cm−2) in 0.1 M KOH electrolyte. These values are in excellent agreement with those reported for the state-of-the-art Pt/C catalyst. Significantly, materials produced via this approach can be manufactured on a large scale, thereby providing access to next-generation catalysts for important electrochemical processes.
中文翻译：
钴纳米颗粒作为高效氧还原电催化剂掺入空心掺杂的多孔碳胶囊中†
铂基材料已成为促进氧还原反应（ORR）的主要和最佳电催化剂。然而，超越最先进的催化剂仍然是一个巨大的挑战。近来，导电碳和地球富含金属的纳米结构复合材料已成为有前途的电催化剂。在本文中，我们报告了一种简便实用的方法，用于合成嵌入中空氮/掺杂钴的多孔碳胶囊（Co @ NPCC）中的钴纳米颗粒。该材料的制造中达到通过在热解后，牺牲金属-有机骨架纳米晶体的热分解被金属-鞣酸配位聚合物壳包覆，从而将嵌入空心胶囊壁中的零价钴纳米颗粒释放出来。事实证明，Co @ NPCC是电化学ORR的极佳催化剂，在0.1 M KOH电解质中显示出很高的正起始电位（相对于RHE为〜1.02 V ）和电流密度（〜5.2 mA cm -2）。这些值与最新的Pt / C催化剂报道的值非常一致。重要的是，可以大规模生产通过这种方法生产的材料，从而为重要的电化学过程提供了新一代催化剂的使用途径。
更新日期：2018-09-10
中文翻译：
钴纳米颗粒作为高效氧还原电催化剂掺入空心掺杂的多孔碳胶囊中†
铂基材料已成为促进氧还原反应（ORR）的主要和最佳电催化剂。然而，超越最先进的催化剂仍然是一个巨大的挑战。近来，导电碳和地球富含金属的纳米结构复合材料已成为有前途的电催化剂。在本文中，我们报告了一种简便实用的方法，用于合成嵌入中空氮/掺杂钴的多孔碳胶囊（Co @ NPCC）中的钴纳米颗粒。该材料的制造中达到通过在热解后，牺牲金属-有机骨架纳米晶体的热分解被金属-鞣酸配位聚合物壳包覆，从而将嵌入空心胶囊壁中的零价钴纳米颗粒释放出来。事实证明，Co @ NPCC是电化学ORR的极佳催化剂，在0.1 M KOH电解质中显示出很高的正起始电位（相对于RHE为〜1.02 V ）和电流密度（〜5.2 mA cm -2）。这些值与最新的Pt / C催化剂报道的值非常一致。重要的是，可以大规模生产通过这种方法生产的材料，从而为重要的电化学过程提供了新一代催化剂的使用途径。
京公网安备 11010802027423号