DataVXACS Applied Materials & InterfacesPaper
journal article·2018-11-21

Carbon Defect-Induced Reversible Carbon–Oxygen Interfaces for Efficient Oxygen Reduction

Qilong Wu, Qian Liu, Yunjie Zhou, Yue Sun, Jiongpeng Zhao, Yang Liu, Fuchen Liu, Manxiu Nie, Fandi Ning, Nianjun Yang, Xin Jiang, Xiaochun Zhou, Jun Zhong, Zhenhui Kang

ACS Applied Materials & Interfaces· Volume 10· Issue 46
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Source abstract

Abstract

It is a great challenge to fabricate a metal-free oxygen reduction reaction (ORR) electrocatalyst that can operate well in the acidic medium and fuel cells system. Here, a metal-free carbon material C-900 with abundant defect sites is fabricated by a self-sacrificed template and a solid-state reaction strategy. C-900 shows a superior performance to 20% Pt/C in alkaline medium and a performance closer to 20% Pt/C in acidic condition. It can thus be applied in air-breathing fuel cell (without extra operation pressure) as the cathode catalyst, which shows a high performance (1160 W L–1; ∼62% of 20% Pt/C) with excellent stability. By using oxygen temperature-programmed desorption, the strong selective chemisorption of O2 on C-900 has been revealed. The excellent chemisorption property of C-900 may originate from the large amounts of carbon defect sites, which have been confirmed by synchrotron radiation-based X-ray absorption spectroscopy. The rich defect sites and excellent chemisorption property can thus induce reversible carbon–oxygen interface for the excellent ORR activity.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemistry and Chemical Engineering, TKL of Organic Solar Cells and Photochemical Conversion, Tianjin University of Technology Tianjin 300384, China

Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China

Division of Advanced Nanomaterials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China

Institute of Materials Engineering, University of Siegen, Siegen 57076, Germany

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Collaborative Innovation Center of Suzhou Nano Science and Technology · Priority Academic Program Development of Jiangsu Higher Education Institutions · Tianjin Municipality

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