Metal–Organic Framework‐Derived N‐Doped Carbon with Controllable Mesopore Sizes for Low‐Pt Fuel Cells

Author:

Huang Qirui1ORCID,Hu Linyu12,Chen Xianchun1ORCID,Cai Wenjun1,Wang Lu1ORCID,Wang Bo1

Affiliation:

1. Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster Science Ministry of Education Frontiers Science Center for High Energy Material Advanced Technology Research Institute (Jinan) School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 P. R. China

2. School of Microelectronics Southern University of Science and Technology Shenzhen 518055 P. R. China

Abstract

AbstractMesoporous structure of carbon materials plays an important role in electrocatalyst design. Constructing carbon supports with tunable mesopores has long been a challenge. Herein, the elaborate regulation of mesopores in N‐doped carbon materials is reported by pyrolyzing energetic metal‐triazolate (MET) frameworks with different particle sizes and at different ramp rates. Higher thermal transfer rates brought about by smaller particle size and higher ramp rate lead to more violent decomposition with a large number of gases producing, which in turn result in larger mesopores in the derivatives. Consequently, a series of N‐doped carbon materials with controllable mesopores are obtained. As a proof‐of‐concept, ultrafine Pt nanoparticles are enveloped inside these mesopores to acquire high‐performance electrocatalysts for oxygen reduction reaction. The optimized catalyst achieves high mass activity of 1.52 A mgPt−1 at 0.9 ViR‐free and peak power density of 0.8 W cm−2 (H2‐Air) with an ultralow Pt loading of 0.05 mgPt cm−2 at cathode in fuel cells, highlighting the great advantages of MET‐derived carbon materials with controllable mesopores in the preparation of advanced electrocatalysts.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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