Journal
CHEMICAL ENGINEERING JOURNAL
Volume 427, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.130952
Keywords
Coordination polymer; Zinc-based framework; Implanting; Improvement; Hydrogen evolution reaction
Categories
Funding
- National Natural Science Foundation of China [21601045]
- China Postdoctoral Science Foundation [2016M601768]
- Fundamental Research Funds for the Central Universities [JZ2019HGTB0059, 202010359097]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Jiangsu Joint Laboratory of Atmospheric Pollution Control
- Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials
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This research improved the electrocatalytic performance of two zinc-based coordination polymers through Co2+ doping, producing excellent electrocatalysts for electrolysis of water to produce hydrogen with low starting potential, high Tafel efficiency, and excellent cycle stability.
Hydrogen energy has been considering as an ideal renewable energy source and playing a very important role in daily life. Noble metal catalysts have shown excellent catalytic performance in electrolysis of water for hydrogen evolution, but their scarcity and high cost limit their large-scale use. Therefore, the design of non-noble metal catalysts with high catalytic activity and stability and low cost is an urgent problem to be solved. Two zinc-based coordination polymers have been synthesized by one-pot method. We developed an effective method through simple Co2+ doping, which improved and optimized the electrocatalytic performance to obtain two high-quality electrocatalysts for electrolysis of water to produce hydrogen with low starting potential (-210 mV and -240 mV), high Tafel efficiency (117.7 mV dec-1 and 127.8 mV dec-1) and excellent cycle stability (>95% LSV retention after at least 2000 cycles). We also synthesized two isomorphic Co-based or Ni-based coordination polymers, and found that their electrocatalytic performances were improved to some extent after the introduction of Co ions, but the effects were not as good as that of zinc-based coordination polymers. This work not only provides two examples of good electrocatalyst, but also provides an idea to improve and optimize the electrocatalytic performance.
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