TY - JOUR
T1 - Self-assembled core–shell nanocomposite catalysts consisting of single-site Co-coordinated g-C3N4 and Au nanorods for plasmon-enhanced CO2 reduction
AU - Yoshii, Takeharu
AU - Tamaki, Kenjirou
AU - Kuwahara, Yasutaka
AU - Mori, Kohsuke
AU - Yamashita, Hiromi
N1 - Funding Information:
The present work was supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) [grant no. 19H00838 ]. A part of this work was supported by the Cooperative Research Program of the "Network Joint Research Center for Materials and Devices” [grant no. 20201097 , 20211069 ]. T. Y. thanks JSPS for a Research Fellowship for Young Scientists [grant no. 18J20246 ]. Y. K., K. M., and H. Y. thank the Elements Strategy Initiative of MEXT [grant no. JPMEXTP0112101003 ]. XAFS data were recorded at the BL01B1 station at SPring-8, JASRI, Harima, Japan [proposal nos. 2019B1091, 2019B1114]. The authors appreciate Dr. Takashi Kamegawa at Osaka Prefecture University for his kind support with the zeta potential measurements.
Funding Information:
The present work was supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) [grant no. 19H00838]. A part of this work was supported by the Cooperative Research Program of the "Network Joint Research Center for Materials and Devices” [grant no. 20201097, 20211069]. T. Y. thanks JSPS for a Research Fellowship for Young Scientists [grant no. 18J20246]. Y. K. K. M. and H. Y. thank the Elements Strategy Initiative of MEXT [grant no. JPMEXTP0112101003]. XAFS data were recorded at the BL01B1 station at SPring-8, JASRI, Harima, Japan [proposal nos. 2019B1091, 2019B1114]. The authors appreciate Dr. Takashi Kamegawa at Osaka Prefecture University for his kind support with the zeta potential measurements.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10
Y1 - 2021/10
N2 - Designing efficient photocatalyst materials for CO2 reduction and utilization has become important to address environmental and energy concerns. A new type of core–shell-structured nanocomposite catalyst is reported herein, in which single-site Co catalytic species are immobilized in graphitic carbon nitride (g-C3N4) layered on Au nanorods (NRs) for surface plasmon resonance (SPR)-enhanced photocatalytic CO2 conversion. Single-site Co species were incorporated into g-C3N4 via a simple pyrolysis process, and core–shell nanocomposites were self-formed via electrostatic interactions between the positively charged surfaces of the Au NRs and negatively charged single-site Co-coordinated g-C3N4 layer. The structure was comprehensively examined by TEM, XRD, UV–vis, Co K-edge XAFS, FT-IR, and zeta potential measurements, which showed that the g-C3N4 layer did not prevent the Au NRs from absorbing visible light. The nanocomposite efficiently catalyzed the reduction of CO2 to CO under visible light irradiation with the assistance of the SPR of the Au NRs. The catalytic activity of the core–shell-structured catalyst was superior to that of the corresponding aggregated catalyst, demonstrating that the formation of a core–shell structure affords efficient electron transport from the Au NRs to the catalytically active Co species.
AB - Designing efficient photocatalyst materials for CO2 reduction and utilization has become important to address environmental and energy concerns. A new type of core–shell-structured nanocomposite catalyst is reported herein, in which single-site Co catalytic species are immobilized in graphitic carbon nitride (g-C3N4) layered on Au nanorods (NRs) for surface plasmon resonance (SPR)-enhanced photocatalytic CO2 conversion. Single-site Co species were incorporated into g-C3N4 via a simple pyrolysis process, and core–shell nanocomposites were self-formed via electrostatic interactions between the positively charged surfaces of the Au NRs and negatively charged single-site Co-coordinated g-C3N4 layer. The structure was comprehensively examined by TEM, XRD, UV–vis, Co K-edge XAFS, FT-IR, and zeta potential measurements, which showed that the g-C3N4 layer did not prevent the Au NRs from absorbing visible light. The nanocomposite efficiently catalyzed the reduction of CO2 to CO under visible light irradiation with the assistance of the SPR of the Au NRs. The catalytic activity of the core–shell-structured catalyst was superior to that of the corresponding aggregated catalyst, demonstrating that the formation of a core–shell structure affords efficient electron transport from the Au NRs to the catalytically active Co species.
KW - CO reduction reaction
KW - Core–shell nanocomposite
KW - Graphitic carbon nitride
KW - Single-site metal catalyst
KW - Surface plasmon resonance
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U2 - 10.1016/j.jcou.2021.101691
DO - 10.1016/j.jcou.2021.101691
M3 - Article
AN - SCOPUS:85114047523
VL - 52
JO - Journal of CO2 Utilization
JF - Journal of CO2 Utilization
SN - 2212-9820
M1 - 101691
ER -