posted on 2024-01-22, 15:42authored byLiang Ma, Xinyi Cai, Zhongli Liang, Shun Lu, Pengxuan Wu, Songbai Qiu, Qian Zhang, Tiejun Wang
In
this work, a facile method to tune the carbon dioxide (CO2) reduction reaction (CRR) activities of graphitic carbon
nitride (GCN) was developed via the capping-agent-free involvement
of a trace amount of Ag nanocrystals with a decreased size. After
the optimization of experimental conditions, the CRR performance investigation
confirms that Ag-GCN-0.2 exhibited a superior CRR performance, achieving
a faradaic efficiency (FE) of more than 72 ± 1% for CO in a wide
potential range from −0.6 to −1.1 V (vs reversible hydrogen
electrode (RHE)) and a max FE of 89 ± 1% at an overpotential
of 0.9 V with a constant current density and a well-maintained microstructure
even after 12 h of electrolysis. This work provides a new route to
tune the catalytical performance of GCN and pave the way for the rational
design, synthesis, and accurate estimation of the GCN-based catalysts,
which will be synthesized on a large scale and utilized in industries.