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Electrochemically Inert g-C3N4 Promotes Water Oxidation Catalysis

Journal Article


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Abstract


  • Electrode surface wettability is critically important for heterogeneous electrochemical reactions taking place in aqueous and nonaqueous media. Herein, electrochemically inert g-C 3 N 4 (GCN) is successfully demonstrated to significantly enhance water oxidation by constructing a superhydrophilic catalyst surface and promoting substantial exposure of active sites. As a proof-of-concept application, superhydrophilic GCN/Ni(OH) 2 (GCNN) hybrids with monodispersed Ni(OH) 2 nanoplates strongly anchored on GCN are synthesized for enhanced water oxidation catalysis. Owing to the superhydrophilicity of functionalized GCN, the surface wettability of GCNN (contact angle 0°) is substantially improved as compared with bare Ni(OH) 2 (contact angle 21°). Besides, GCN nanosheets can effectively suppress Ni(OH) 2 aggregation to help expose more active sites. Benefiting from the well-defined catalyst surface, the optimal GCNN hybrid shows significantly enhanced electrochemical performance over bare Ni(OH) 2 nanosheets, although GCN is electrochemically inert. In addition, similar catalytic performance promotion resulting from wettability improvement induced by incorporation of hydrophilic GCN is also successfully demonstrated on Co(OH) 2 . The present results demonstrate that, in addition to developing new catalysts, building efficient surface chemistry is also vital to achieve extraordinary water oxidation performance.

Publication Date


  • 2018

Citation


  • Chen, Y., Zhou, Q., Zhao, G., Yu, Z., Wang, X., Dou, S. Xue. & Sun, W. (2018). Electrochemically Inert g-C3N4 Promotes Water Oxidation Catalysis. Advanced Functional Materials, 28 (5), 1705583-1-1705583-7.

Scopus Eid


  • 2-s2.0-85036503079

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3954&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2904

Has Global Citation Frequency


Start Page


  • 1705583-1

End Page


  • 1705583-7

Volume


  • 28

Issue


  • 5

Place Of Publication


  • Germany

Abstract


  • Electrode surface wettability is critically important for heterogeneous electrochemical reactions taking place in aqueous and nonaqueous media. Herein, electrochemically inert g-C 3 N 4 (GCN) is successfully demonstrated to significantly enhance water oxidation by constructing a superhydrophilic catalyst surface and promoting substantial exposure of active sites. As a proof-of-concept application, superhydrophilic GCN/Ni(OH) 2 (GCNN) hybrids with monodispersed Ni(OH) 2 nanoplates strongly anchored on GCN are synthesized for enhanced water oxidation catalysis. Owing to the superhydrophilicity of functionalized GCN, the surface wettability of GCNN (contact angle 0°) is substantially improved as compared with bare Ni(OH) 2 (contact angle 21°). Besides, GCN nanosheets can effectively suppress Ni(OH) 2 aggregation to help expose more active sites. Benefiting from the well-defined catalyst surface, the optimal GCNN hybrid shows significantly enhanced electrochemical performance over bare Ni(OH) 2 nanosheets, although GCN is electrochemically inert. In addition, similar catalytic performance promotion resulting from wettability improvement induced by incorporation of hydrophilic GCN is also successfully demonstrated on Co(OH) 2 . The present results demonstrate that, in addition to developing new catalysts, building efficient surface chemistry is also vital to achieve extraordinary water oxidation performance.

Publication Date


  • 2018

Citation


  • Chen, Y., Zhou, Q., Zhao, G., Yu, Z., Wang, X., Dou, S. Xue. & Sun, W. (2018). Electrochemically Inert g-C3N4 Promotes Water Oxidation Catalysis. Advanced Functional Materials, 28 (5), 1705583-1-1705583-7.

Scopus Eid


  • 2-s2.0-85036503079

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3954&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2904

Has Global Citation Frequency


Start Page


  • 1705583-1

End Page


  • 1705583-7

Volume


  • 28

Issue


  • 5

Place Of Publication


  • Germany