The application of N-doped distillers' grains porous carbon in the oxygen reduction reaction

被引：0

作者：

Xun, Jinghui ^{[1
,2
]}

Chen, Zerui ^{[2
]}

Meng, Aiyun ^{[2
]}

Huang, Le ^{[2
]}

Niu, Shuzhang ^{[2
]}

Zeng, Shaozhong ^{[2
]}

Yu, Xiao ^{[2
]}

Liu, Weifeng ^{[1
]}

Fu, Dongju ^{[2
]}

Liu, Xuguang ^{[1
]}

机构：

[1] Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan

[2] College of New Materials and New Energies, Shenzhen Technology University, Guangdong, Shenzhen

来源：

基金：

中国国家自然科学基金;

关键词：

Heteroatom catalyst; Oxygen reduction reaction; Waste biomass;

D O I：

10.1016/j.diamond.2025.112304

中图分类号：

学科分类号：

摘要：

The scarcity and poor cycle stability of platinum, the key catalyst for the oxygen reduction reaction (ORR) in fuel cells and metal-air batteries, necessitate the development of alternative catalysts that are low-cost yet highly efficient. In this study, a novel catalyst was synthesized through chemical activation and nitrogen doping of distillers' grains, a biomass material that is rich in heteroatoms. Under alkaline conditions (0.1 M KOH), the ORR peak potential (0.833 V) of the resulting catalyst is comparable to that of commercial Pt/C (0.844 V), with a half-wave potential(E1/2) of 0.802 V, achieving 97.3 % of the Pt/C performance. The onset potential (Eonset) of 0.93 V is also close to that of Pt/C (0.94 V). When the catalyst loading is increased to 0.75 mg/cm2, it exhibits a similar current density, E1/2 of 0.81 V, and Eonset of 0.98 V, even surpassing Pt/C. Stability tests using the i-t method show a current decay of 23.96 % after 12 h, outperforming the 79.71 % decay observed for Pt/C. Furthermore, the catalyst demonstrates superior methanol tolerance. In addition to providing a new way to utilize distillers' grains, the new catalyst achieves catalytic properties comparable to commercial Pt/C catalysts while controlling costs, and is expected to be a potential alternative to Pt/C catalysts for applications. © 2025

引用

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