The Effect of Metal Components in the Quaternary Electrocatalysts on the Morphology and Catalytic Performance of Transition Metal Phosphides,Electroanalysis

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The Effect of Metal Components in the Quaternary Electrocatalysts on the Morphology and Catalytic Performance of Transition Metal Phosphides
Electroanalysis ( IF 2.7 ) Pub Date : 2018-09-20 , DOI: 10.1002/elan.201800494
Qiao Cao _{1,

2} , Wenling Gu _{1,

2} , Jing Li _{1,

2} , Erkang Wang _{1,

2}

Affiliation

Development of low‐cost, earth‐abundant alternative electrocatalysts to platinum catalyst for hydrogen evolution reaction (HER) is of great significance. Some multimetallic transition metal phosphides have been synthesized recently. However, the impacts of metal components on the morphology and performance of catalyst were less discussed. In this communication, taking the quaternary phosphides Co_xNi_yMn_zP (x+y+z=1) grown on carbon cloth (CC) as an example, the influence of proportion of metals in catalysts on the morphology and HER performance was investigated in detail. The results indicated that When x/y/z=6/1/1(Co_0.75Ni_0.125Mn_0.125P), a nanowire morphology was grown on CC with the optimal HER performance, which had a Tafel slope of 48.87 mV/dec and needed 137 and 190 mV to realize a current density of 10 and 100 mA cm⁻², respectively. Moreover, the electrocatalysts exhibited an excellent long‐term electrochemical durability for at least 12.5 h.

中文翻译：

季电催化剂中金属组分对过渡金属磷酸盐形态和催化性能的影响

低成本，富含地球的替代电催化剂可用于铂催化剂的析氢反应（HER）具有重要意义。最近已经合成了一些多金属过渡金属磷化物。然而，金属组分对催化剂的形态和性能的影响很少讨论。在此通讯中，以在碳布（CC）上生长的四价磷化物Co _x Ni _y Mn _z P（x + y + z = 1）为例，催化剂中金属比例对形态和HER性能的影响为详细调查。结果表明，当x / y / z = _6/1/1（Co _0.75 Ni _0.125 Mn _0.125P），具有最佳HER性能的纳米线形态在CC上生长，其Tafel斜率为48.87 mV / dec，分别需要137和190 mV才能实现10和100 mA cm ^-2的电流密度。此外，电催化剂在至少12.5小时内表现出出色的长期电化学耐久性。

更新日期：2018-09-20

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