During the catalytic process, the microenvironment and surface area of the catalyst will affect the catalytic performance. Hence, an assisted organic linker coated metal-organic framework (MOF) has been applied, to form Ni/HNC (HNC represents hollow nanocage) for electrocatalytic CO2 reduction. Remarkably, Ni/HNC achieves superb activity with high Faradaic efficiency (FE) of 97.2% at 0.7 V vs. reversible hydrogen electrode (RHE) towards CO2 conversion to CO. In contrast to Ni/NPC (afforded from the naked MOF), the Ni/HNC displays higher FE and selectivity on CO rather than H2, owing to the large nanocage which extraordinarily facilitates CO2 enrichment and the active sites easily accessible. This work provides a general and feasible route to construct high-efficient electrochemical CO2 reduction reaction (EC-CO2RR) catalysts via post-modified MOFs.
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Research Article
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Nano Research 2023, 16(7): 8970-8976
Published: 14 April 2023
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