Details

Autor(en) / Beteiligte

• Lu, Peilong
• Yang, Yijun
• Yao, Jiannian
• Wang, Meng
• Dipazir, Sobia
• Yuan, Menglei
• Zhang, Jingxian
• Wang, Xi
• Xie, Zhujun
• Zhang, Guangjin

Titel

Facile synthesis of single-nickel-atomic dispersed N-doped carbon framework for efficient electrochemical CO2 reduction

Ist Teil von

• Applied catalysis. B, Environmental, 2019-02, Vol.241, p.113-119

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• An excellent CO2 electroreduction catalytic performance with exceptionally high activity and selectivity was achieved on atomically dispersed Ni sites. [Display omitted] •A facile synthesis route of single-nickel-atomic dispersed N-doped carbon framework was developed.•An excellent CO2 electroreduction catalytic performance with exceptionally high activity and selectivity was achieved on atomically dispersed nickel sites.•Adding extra N source increased low-coordinated sites and created a favourable structure which improved electrocatalytic performance of single-nickel-atomic catalyst. While converting carbon dioxide (CO2) into value-added carbon products by electrolyzing offers a promising approach to mitigate global warming and store energy, poor selectivity and stability of catalysts still impede this conversion. Single-atom catalyst exhibits exceptional selectivity for CO2 electroreduction reaction in response to inhibiting hydrogen evolution reaction (HER), which is the major obstacle to the development of CO2 reduction. Herein we introduce a facile approach to obtain Ni-Nx sites encapsulating into carbon nanotubes with a nickel loading as high as 6.63 wt%. This catalyst exhibits high Faradaic efficiency approximately 95% for CO2 electroreduction to carbon monoxide (CO) in the wide potential range from −0.7 to −1.0 V, and the current density reaches 57.1 mA cm−2 at −1.0 V versus a reversible hydrogen electrode (RHE). Experiments and characterization results demonstrate that nickel chemical state and content play a vital role for CO2 electrocatalytic performance. Moreover, the simplifying of the synthesis may shed a new light on design single atom catalysts of electrochemistry in addition to CO2 reduction.