journal article·2020-07-27

Laser Irradiation in Liquid to Release Cobalt Single-Atom Sites for Efficient Electrocatalytic N2 Reduction

Shengbo Zhang, Quan Jiang, Tongfei Shi, Qiao Sun, Yixing Ye, Yue Lin, Li Rong Zheng, Guozhong Wang, Changhao Liang, Haimin Zhang, Huijun Zhao

ACS Applied Energy Materials· Volume 3· Issue 7
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Abstract

We synthesize Co single atoms anchored on N-doped carbon (Co-SAs/NC) by carbonizing a mixture of cobalt acetate, tartaric acid, and polyvinylpyrrolidone. The Co-SAs/NC exhibits nitrogen reduction reaction (NRR) activity, affording an NH3 yield rate of 9.7 μg h–1 mgcat.–1 with a Faradaic efficiency (FE) of 7.5% at −0.45 V (vs RHE) in 0.005 M H2SO4. After laser-irradiation treatment, the Co-SAs/NC indicates an enhanced NH3 yield rate (16.9 μg h–1 mgcat.–1) and FE (18.8%) at −0.25 V (vs RHE) in 0.005 M H2SO4. The improved NRR activity is due to more exposed Co-N3 sites on Co-SAs/NC after the laser-irradiation treatment.
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Research context

OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · Advanced Photocatalysis Techniques · Catalytic Processes in Materials Science

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

Affiliations

Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China

University of Science and Technology of China, Hefei 230026, China

State Key Laboratory of Radiation Medicine and Protection, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, China

Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China

Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China

Centre for Clean Environment and Energy, Griffith University, Gold Coast Campus, Gold Coast, Queensland 4222, Australia

Funding

Youth Innovation Promotion Association of the Chinese Academy of Sciences · CAS-SAFEA International Partnership Program for Creative Research Teams · National Synchrotron Radiation Laboratory · National Natural Science Foundation of China

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