Facile Synthesis of Mesoporous α-Fe2O3@g-C3N4-NCs for Efficient Bifunctional Electro-catalytic Activity (OER/ORR)

被引：106

作者：

Alduhaish, Osamah ^{[1
]}

Ubaidullah, Mohd ^{[1
]}

Al-Enizi, Abdullah M. ^{[1
]}

Alhokbany, Norah ^{[1
]}

Alshehri, Saad M. ^{[1
]}

Ahmed, Jahangeer ^{[1
]}

机构：

[1] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

关键词：

ONE-POT SYNTHESIS; OXYGEN EVOLUTION; PHOTOCATALYTIC PERFORMANCE; DOPED CARBON; G-C3N4; REDUCTION; ELECTROCATALYST; NANOCOMPOSITES; NANOSPHERES; ADSORPTION;

D O I：

10.1038/s41598-019-50780-2

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Mesoporous alpha-iron oxide@graphitized-carbon nitride nanocomposites (alpha-Fe2O3@g-C3N4-NCs) were synthesized using urea-formaldehyde (UF) resins at 400 degrees C/2 h. The mesoporous nature of the prepared nanocomposites was observed from electron microscopy and surface area measurements. The electrochemical measurements show the bifunctional nature of mesoporous alpha-Fe2O3@g-C3N4-NCs in electrolysis of water for oxygen evolution and oxygen reduction reactions (OER/ORR) using 0.5 M KOH. Higher current density of mesoporous alpha-Fe2O3@g-C3N4-NCs reveals the enhanced electrochemical performance compared to pure Fe2O3 nanoparticles (NPs). The onset potential, over-potential and Tafel slopes of mesoporous alpha-Fe2O3@g-C3N4-NCs were found lower than that of pure alpha-Fe2O3-NPs. Rotating disc electrode experiments followed by the K-L equation were used to investigate 4e(-) redox system. Therefore, the mesoporous alpha-Fe2O3@g-C3N4-NCs bifunctional electro-catalysts can be considered as potential future low-cost alternatives for Pt/C catalysts, which are currently used in fuel cells.

引用

页数：10

共 59 条

[21] MOF-derived honeycomb-like N-doped carbon structures assembled from mesoporous nanosheets with superior performance in lithiumion batteries [J].

Han, Xiguang ;

Sun, Liming ;

Wang, Fan ;

Sun, Di .

JOURNAL OF MATERIALS CHEMISTRY A, 2018, 6 (39) :18891-18897

[22] Microfluidic synthesis and on-chip enrichment application of two-dimensional hollow sandwich-like mesoporous silica nanosheet with water ripple-like surface [J].

Hao, Nanjing ;

Nie, Yuan ;

Closson, Andrew B. ;

Zhang, John X. J. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2019, 539 :87-94

[23] The properties and photocatalytic performance comparison of Fe3+-doped g-C3N4 and Fe2O3/g-C3N4 composite catalysts [J].

Hu, Shaozheng ;

Jin, Ruirui ;

Lu, Guang ;

Liu, Dan ;

Gui, Jianzhou .

RSC ADVANCES, 2014, 4 (47) :24863-24869

[24] Fluorine doped (Ir,Sn,Nb)O2 anode electro-catalyst for oxygen evolution via PEM based water electrolysis [J].

Kadakia, Karan ;

Datta, Moni Kanchan ;

Velikokhatnyi, Oleg I. ;

Jampani, Prashanth H. ;

Kumta, Prashant N. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2014, 39 (02) :664-674

[25] Low temperature fabrication of Fe2O3 nanorod film coated with ultra-thin g-C3N4 for a direct z-scheme exerting photocatalytic activities [J].

Kang, Suhee ;

Jang, Joonyoung ;

Pawar, Rajendra C. ;

Ahn, Sung-Hoon ;

Lee, Caroline Sunyong .

RSC ADVANCES, 2018, 8 (59) :33600-33613

[26] Application of the Koutecky-Levich Method to the Analysis of Steady State Voltammograms with Ultramicroelectrodes [J].

Kim, Jiyeon ;

Bard, Allen J. .

ANALYTICAL CHEMISTRY, 2016, 88 (03) :1742-1747

[27] Effect of the Oxide-Carbon Heterointerface on the Activity of Co3O4/NRGO Nanocomposites toward ORR and OER [J].

Kumar, Kavita ;

Canaff, Christine ;

Rousseau, Julie ;

Arrii-Clacens, Sandrine ;

Napporn, Teko W. ;

Habrioux, Aurelien ;

Kokoh, Kouakou B. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (15) :7949-7958

[28] Synthesis and Activities of Rutile IrO2 and RuO2 Nanoparticles for Oxygen Evolution in Acid and Alkaline Solutions [J].

Lee, Youngmin ;

Suntivich, Jin ;

May, Kevin J. ;

Perry, Erin E. ;

Shao-Horn, Yang .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2012, 3 (03) :399-404

[29] Facile Oxygen Reduction on a Three-Dimensionally Ordered Macroporous Graphitic C3N4/Carbon Composite Electrocatalyst [J].

Liang, Ji ;

Zheng, Yao ;

Chen, Jun ;

Liu, Jian ;

Hulicova-Jurcakova, Denisa ;

Jaroniec, Mietek ;

Qiao, Shi Zhang .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2012, 51 (16) :3892-3896

[30] Mesoporous g-C3N4 nanosheets prepared by calcining a novel supramolecular precursor for high-efficiency photocatalytic hydrogen evolution [J].

Liu, Qiong ;

Wang, Xueli ;

Yang, Qian ;

Zhang, Zhengguo ;

Fang, Xiaoming .

APPLIED SURFACE SCIENCE, 2018, 450 :46-56

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