Inorganic nanocrystal‑carbon composite derived from cross‑linked gallic acid derivative of polyphosphazenes for the efficient oxygen evolution reaction

서지정보

· 발행기관 : 한국탄소학회
· 수록지 정보 : Carbon letters / 33권 / 3호
· 저자명 : Zahid Ali, M. Asim Mushtaq, Yasir Abbas, Wei Liu, Zhanpeng Wu

목차

Inorganic nanocrystal-carbon composite derived from cross-linked gallic acid derivative of polyphosphazenes for the efficient oxygen evolution reaction
Abstract
Graphical abstract
1 Introduction
2 Materials required
2.1 Synthesis of gel
2.2 Solvothermal synthesis of inorganic nanocrystal-carbon composite
3 Characterizations
4 Results and discussions
4.1 Structure elucidation
4.2 XPS analysis of INCCs
4.3 Morphology of Fe-carbon composites
4.4 Surface area and pore size distribution
5 Electrochemical testing
6 Conclusion
Acknowledgements
References

영어초록

The development of heteroatoms doped inorganic nanocrystal-carbon composites (INCCs) has attained a great focus for energy applications (energy production and energy storage). A precise approach to fabricate the INCCs with homogenous distribution of the heteroatoms with an appropriate distribution of metal atoms remains a challenge for material scientists. Herein, we proposed a facile two-step route to synthesize INCC with doping of metal (α-Fe2O3) and non-metals (N, P, O) using hydrogel formed by treating hexachlorocyclotriphosphazene (HCCP) and 3, 4, 5-trihydroxy benzoic acid (Gallic acid). Metal oxide was doped using an extrinsic doping approach by varying its content and non-metallic doping by an intrinsic doping approach. We have fabricated four different samples (INCC-0.5%, INCC-1.0%, INCC-1.5%, and INCC-2.0%), which exhibit the uniform distribution of the N, P, O, and α-Fe2O3 in the carbon architecture. These composite materials were applied as anode material in water oxidation catalysis (WOC); INCC-1.5% electro-catalyst confirmed by cyclic voltammetry (CV) with a noticeable catholic peak 0.85 V vs RHE and maximal current density 1.5 mA.cm−2. It also delivers better methanol tolerance and elongated stability than RuO2; this superior performance was attributed due to the homogenous distribution of the α-Fe2O3 causing in promotion of adsorption of O2 initially and a greater surface area of 1352.8 m2/ g with hierarchical pore size distribution resulting higher rate of ion transportation and mass-flux.

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