Efficient Co@CoPx core–shell nanochains catalyst for the oxygen evolution reaction†,Inorganic Chemistry Frontiers

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Efficient Co@CoPx core–shell nanochains catalyst for the oxygen evolution reaction†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-05-30 00:00:00 , DOI: 10.1039/c8qi00428e
Xiaotao Yuan _{1,

2,

3,

4,

5} , Zhe Zhang _{1,

2,

3,

4,

5} , Zichao Liu _{1,

2,

3,

4,

5} , Xin Wang _{1,

2,

3,

4,

5} , Chenlong Dong _{1,

2,

3,

4,

5} , Muhammad Sohail Riaz _{1,

2,

3,

4,

5} , Fuqiang Huang _{1,

2,

3,

4,

5}

Affiliation

Co@CoP_x core–shell nanochains were prepared via a direct-current arc-discharge method and subsequent phosphorization at 350 °C. The nanochains comprise nanospheres connected to each other with a length of several micrometers. The amount of CoP_x can be easily changed by varying the phosphorization time. In the Co@CoP_x core–shell structure, Co serves as a conductive channel, which improves the reaction kinetics of the oxygen evolution process on CoP_x. Co metal can also inject electrons into CoP_x, thus changing the work function of CoP_x and improving its oxygen evolution efficiency. Based on the optimized structure, the Co@CoP_x nanochains catalyst exhibits excellent oxygen evolution performance. Co@CoP_x achieves an overpotential of 310 mV at a current density of 10 mA cm⁻², which is lower than that of CoP_x (418 mV), Co (408 mV), and RuO₂ (317 mV). Furthermore, Co@CoP_x exhibits good durability during the long-term electrochemical test.

中文翻译：

高效的Co @ CoP _x核-壳纳米链催化剂，用于氧气释放反应†

Co @ CoP _x核-壳纳米链是通过直流电弧放电方法制备的，随后在350°C下进行了磷化处理。纳米链包括彼此连接的纳米球，纳米球的长度为几微米。通过改变磷化时间可以很容易地改变CoP _x的量。在Co @ CoP _x核-壳结构中，Co用作导电通道，从而改善了CoP _x上析氧过程的反应动力学。Co金属也可以将电子注入扶贫_X，从而改变缔约方会议的功函数_X和改进其析氧效率。基于优化的结构，Co @ CoP _x纳米链催化剂表现出优异的放氧性能。Co @ CoP _x在10 mA cm ^-2的电流密度下实现310 mV的过电势，低于CoP _x（418 mV），Co（408 mV）和RuO ₂（317 mV）的过电势。此外，Co @ CoP _x在长期电化学测试中显示出良好的耐久性。

更新日期：2018-05-30

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