Cu3P/PAN derived N-doped carbon catalyst with non-toxic synthesis for alkaline hydrogen evolution reaction,Sustainable Energy & Fuels

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Cu3P/PAN derived N-doped carbon catalyst with non-toxic synthesis for alkaline hydrogen evolution reaction
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-08-26 , DOI: 10.1039/d0se00923g
HyoWon Kim _{1,

2,

3,

4} , Yongju Lee _{1,

2,

3,

4} , DongHoon Song _{1,

2,

3,

4} , YongKeun Kwon _{1,

2,

3,

4} , Eom-Ji Kim _{1,

2,

3,

4} , EunAe Cho _{1,

2,

3,

4}

Affiliation

To utilize hydrogen as an energy carrier to store surplus electricity, it is necessary to develop a highly efficient and low-cost hydrogen evolution reaction (HER) catalyst for water electrolysis. This work presents an alkaline HER catalyst composed of earth-abundant elements. Through a one-step facile and non-toxic process that combines the phosphorization of copper and the cyclization of polyacrylonitrile (PAN), copper phosphide (Cu₃P) particles embedded in nitrogen-doped carbon were synthesized (Cu₃P/N–C). In the complex structure, Cu₃P is catalytically active towards the HER and N-doped carbon connects the Cu₃P particles electrically and physically. Thus, the incorporation of N-doped carbon simply by adding PAN to a phosphorus precursor improves the electrical conductivity and structural integrity of the Cu₃P electrode during the HER. To achieve the best HER activity, the P-to-PAN ratio was optimized. Cu₃P/N–C prepared on copper foam showed HER overpotentials of 211.1 and 301.8 mV to obtain corresponding current density of 10 and 50 mA cm⁻² in a 1 M KOH solution. At the current density of 10 mA cm⁻², the HER overpotential was stably maintained from 211.1 to 222.1 mV for 24 h. In addition to the enlarged electrochemical active surface area (ECSA), the synergistic effects of the disordered carbon structure formed by the influence of the P source result in the superior performance outcomes of Cu₃P/N–C.

中文翻译：

Cu3P / PAN衍生的N掺杂碳催化剂无毒合成碱性氢放出反应

为了利用氢作为能量载体来存储剩余的电能，有必要开发一种用于水电解的高效且低成本的氢释放反应（HER）催化剂。这项工作提出了一种由稀土元素组成的碱性HER催化剂。通过将铜的磷化和聚丙烯腈（PAN）环化相结合的一步一步的简便而无毒的过程，合成了嵌入氮掺杂碳中的磷化铜（Cu ₃ P）颗粒（Cu ₃ P / N–C ）。在复杂的结构中，Cu ₃ P对HER具有催化活性，并且N掺杂的碳连接Cu ₃电和物理上的P粒子。因此，仅通过将PAN添加到磷前体中来掺入N掺杂碳可改善HER期间Cu ₃ P电极的电导率和结构完整性。为了获得最佳的HER活性，优化了P-PAN比率。在1M KOH溶液中，在泡沫铜上制备的Cu ₃ P / N–C显示HER超电势为211.1和301.8 mV，从而获得相应的电流密度10和50 mA cm ^-2。在10 mA cm ^-2的电流密度下，HER超电势从211.1 mV稳定地维持在222.1 mV 24小时。除了扩大的电化学活性表面积（ECSA）外，由于P源的影响而形成的无序碳结构的协同效应还导致Cu ₃ P / N–C的优异性能。

更新日期：2020-09-29

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