@article{Chen2020, 
author = {Yiqun Chen and Yuejian Yao and Yujian Xia and Kun Mao and Gongao Tang and Qiang Wu and Lijun Yang and Xizhang Wang and Xuhui Sun and Zheng Hu},
title = {Advanced Ni-Nx-C single-site catalysts for CO2 electroreduction to CO based on hierarchical carbon nanocages and S-doping},
year = {2020},
journal = {Nano Research},
volume = {13},
number = {10},
pages = {2777-2783},
keywords = {CO2 electroreduction, hierarchical carbon nanocages, single-site catalysts, nickel-nitrogen-carbon, S-doping},
url = {https://www.sciopen.com/article/10.1007/s12274-020-2928-0},
doi = {10.1007/s12274-020-2928-0},
abstract = {Metal-nitrogen-carbon materials are promising catalysts for CO2 electroreduction to CO. Herein, by taking the unique hierarchical carbon nanocages as the support, an advanced nickel-nitrogen-carbon single-site catalyst is conveniently prepared by pyrolyzing the mixture of NiCl2 and phenanthroline, which exhibits a Faradaic efficiency plateau of > 87% in a wide potential window of -0.6 - -1.0 V. Further S-doping by adding KSCN into the precursor much enhances the CO specific current density by 68%, up to 37.5 A·g-1 at -0.8 V, along with an improved CO Faradaic efficiency plateau of > 90%. Such an enhancement can be ascribed to the facilitated CO pathway and suppressed hydrogen evolution from thermodynamic viewpoint as well as the increased electroactive surface area and improved charge transfer fromkinetic viewpoint due to the S-doping. This study demonstrates a simple and effective approach to advanced electrocatalysts by synergetic modification of the porous carbon-based support and electronic structure of the active sites.}
}