Zn phthalocyanine/carbon nitride heterojunction for visible light photoelectrocatalytic conversion of CO 2 to methanol

Author Identifier

Hongqi Sun
https://orcid.org/0000-0003-0907-5626

Document Type

Journal Article

Publication Title

Journal of Catalysis

Publisher

Academic Press Inc.

School

School of Engineering

RAS ID

30556

Grant Number

ARC Number : DP170104264

Comments

Zheng, J., Li, X., Qin, Y., Zhang, S., Sun, M., Duan, X., . . . Wang, S. (2019). Zn phthalocyanine/carbon nitride heterojunction for visible light photoelectrocatalytic conversion of CO2 to methanol. Journal of Catalysis, 317. 214-223.

https://doi.org/10.1016/j.jcat.2019.01.022

Abstract

Zinc phthalocyanine/carbon nitride nanosheets photoelectrocatalysts were obtained by evaporation and calcination of the mixture of ZnPc and carbon nitride. It exhibits highly efficient synergistic function between PC-CO2 RR and EC-CO2 RR. The energy band matching between the ZnPc and carbon nitride results in the faster electrons transfer and less electron-hole pairs recombination. The optimized ZnPc/carbon nitride at a ratio of 0.1 wt% demonstrates high efficiency in photoelectrocalytic reduction of CO2 under visible light, generating a major product of methanol at a yield of 13 μmol·cm −2 after 8 h. The efficiency of photoelectrocalytic reduction of CO2 to methanol is 2.6 times as high as that of electrocatalytic CO2 reduction reaction, and 5.9 times as high as that of photocatalytic CO2 reduction reaction. The mechanism of the photoelectrocatalytic CO2 reduction reaction to methanol was discussed in detail.

DOI

10.1016/j.jcat.2019.01.022

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