Abstract
In this paper, we report CoP nanowires supported on carbon cloth (CC) (CoP/CC) as a bifunctional electrode for hydrogen evolution reaction (HER) and supercapacitor. CoP/CC possess an excellent electrocatalytic performance for HER, with a Tafel slope of 56 mV/dec and a low overpotential of 68 mV to achieve a current density of 10 mA cm-2. Remarkably, the bifunctional CoP/CC used as electrode for supercapacitor exhibit a higher specific capacitance of 674 F g-1 at a scan rate of 5 mV s-1 and maintains long-life cycling stability, retaining 86% of the initial capacitance after 10,000 cycles. CoP/CC will be a promising candidate as electrode for HER and supercapacitor.
摘要
本文利用微波辅助水热法在碳布上快速合成了 CoP纳米线阵列(CoP/CC)双功能电极材料可用于析氢反应(HER)和超级电容器的电 极.CoP/CC用于Hm时展现了优越的电化学性能,其塔菲尔斜率为56 mV/dec.当电流密度为10 mA cm-2时,其电位低至68 mV. 值得注意 的是, CoP/CC也可用于超级电容器的电极.在扫描速率为5 mVs-1时, 其比电容高达674 F g-1.同时具有高的循环稳定性, 在循环10000次 后, 比电容仍然可以维持在初始值的86%.本文结果表明, CoP/CC可以作为HER和超级电容器电极的有力候选者.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51732010, 51571172, 11404280, 51672240 and 51571171), the Natural Science Foundation for Distinguished Young Scholars of Hebei Province (E2017203095), the Natural Science Foundation of Hebei Province (E2016203484 and A2015203337), the Research Program of the College Science & Technology of Hebei Province (ZD2017083 and QN2014047), and the Graduate Innovation Fund (CXZZSS2017055 and 2017XJSS044).
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Jiefang Song is a master candidate under the supervision of Dr. Congpu Mu at Yanshan University. She received her bachelor’s degree in 2015. Her research focuses on the synthesis and design of function materials.
Congpu Mu was born in 1984 and joined Yanshan University in 2013. He completed his PhD in physics at Lanzhou University in 2013. His research is related to magnetic nanomaterials, from magnetic metals to magnetic oxide with their applications in microwave absorption and energy storage.
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Facile synthesis and excellent electrochemical performance of CoP nanowire on carbon cloth as bifunctional electrode for hydrogen evolution reaction and supercapacitor
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Song, J., Xiang, J., Mu, C. et al. Facile synthesis and excellent electrochemical performance of CoP nanowire on carbon cloth as bifunctional electrode for hydrogen evolution reaction and supercapacitor. Sci. China Mater. 60, 1179–1186 (2017). https://doi.org/10.1007/s40843-017-9120-6
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DOI: https://doi.org/10.1007/s40843-017-9120-6