NiPS3 quantum sheets modified nitrogen-doped mesoporous carbon with boosted bifunctional oxygen electrocatalytic performance
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第6期
论文作者：Kai Huang Yuyang Xu Yanpeng Song Ruyue Wang Hehe Wei Yuanzheng Long Ming Lei Haolin Tang Jiangang Guo Hui Wu
摘 要：Electrocatalysts for oxygen reduction reactions（ORR） and oxygen evolution reactions（OER） are highly crucial and challenging toward the energy storage and conversion technologies such as fuel cells,metal-air batteries and water electrolysis.To replace noble-metal based catalysts and boost catalytic performance of carbon-based materials,we initially develop the nickel,phospho rus,sulfur and nitrogen co-modified mesoporous carbon（NiPS3@NMC） as a bifunctional oxygen electrocatalyst.The perfo rmance for ORR（half-wave potential at 0.90 V） and OER(10 mA cm-2 at 1.48 V) surpasses those of Pt/C coupled with IrO2 catalysts and most of the non-precious metal based bifunctional electrocatalysts reported in related literature.Moreover,the electrochemical durability is also confirmed by accelerated durability tests（ADTs） and long-term chronoamperometry（CA） tests.We demonstrated that the interfacial effect between NiPS3 quantum sheets（QS s） and NMC substrates by thermal activation contributed to the enhanced oxygen electrode bifunctionality with more active sites,due to the electrons-donating from nickel,phosphorus and sulfur elements and relatively enriched pyridinic type N.Such excellent overall performance highlights the potential application of NiPS3 QSs and NMC composites as the materials on energy conversion and storage.
Kai Huang1，Yuyang Xu1，Yanpeng Song2,3，Ruyue Wang1,4，Hehe Wei4，Yuanzheng Long4，Ming Lei1，Haolin Tang5，Jiangang Guo3，Hui Wu4
1. State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences3. University of Chinese Academy of Sciences4. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University5. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology
摘 要：Electrocatalysts for oxygen reduction reactions（ORR） and oxygen evolution reactions（OER） are highly crucial and challenging toward the energy storage and conversion technologies such as fuel cells,metal-air batteries and water electrolysis.To replace noble-metal based catalysts and boost catalytic performance of carbon-based materials,we initially develop the nickel,phospho rus,sulfur and nitrogen co-modified mesoporous carbon（NiPS3@NMC） as a bifunctional oxygen electrocatalyst.The perfo rmance for ORR（half-wave potential at 0.90 V） and OER(10 mA cm-2 at 1.48 V) surpasses those of Pt/C coupled with IrO2 catalysts and most of the non-precious metal based bifunctional electrocatalysts reported in related literature.Moreover,the electrochemical durability is also confirmed by accelerated durability tests（ADTs） and long-term chronoamperometry（CA） tests.We demonstrated that the interfacial effect between NiPS3 quantum sheets（QS s） and NMC substrates by thermal activation contributed to the enhanced oxygen electrode bifunctionality with more active sites,due to the electrons-donating from nickel,phosphorus and sulfur elements and relatively enriched pyridinic type N.Such excellent overall performance highlights the potential application of NiPS3 QSs and NMC composites as the materials on energy conversion and storage.
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