Chunduri Avani, Gupta Suraj, Patel Maulik, Forster Mark, Cowan Alexander J, Patel Nainesh
Department of Physics, University of Mumbai Vidyanagari, Santacruz (East), Mumbai, 400098, India.
School of Engineering, University of Liverpool, Liverpool, L69 3GH, United Kingdom.
ChemSusChem. 2020 Dec 17;13(24):6534-6540. doi: 10.1002/cssc.202002269. Epub 2020 Nov 11.
New oxygen evolution reaction (OER) electrocatalysts based on low-cost elements, which set new benchmark levels of activity, are vital if water electrolysis is to be applied on a global scale. Herein, a low-cost bimetallic phospho-boride catalyst was developed that showed outstanding OER activity of approximately 195 mV to achieve 10 mA cm in alkaline water electrolysis, with a minimal catalyst loading of 0.3 mg cm . The contrasting electron transfer property of the metal borides and phosphides when combined in phospho-boride modulated the electron density of the Co atom, yielding highly active CoOOH species at lower potentials. The addition of Mo at low levels further enhanced the activity by increasing the surface area and by formation of nano-crystalline domains. The combined contributions from each of the components resulted in a new benchmark mass activity of 666 A g at 300 mV overpotential. This work presents a new avenue towards fabricating electrode materials with exceptional performances.
如果要在全球范围内应用水电解，基于低成本元素的新型析氧反应（OER）电催化剂至关重要，因为它们设定了新的活性基准水平。在此，开发了一种低成本双金属磷硼化物催化剂，在碱性水电解中，该催化剂表现出约195 mV的出色OER活性，可实现10 mA cm ，催化剂负载量低至0.3 mg cm 。金属硼化物和磷化物在磷硼化物中结合时具有相反的电子转移特性，调节了Co原子的电子密度，在较低电位下产生了高活性的CoOOH物种。低含量Mo的添加通过增加表面积和形成纳米晶域进一步提高了活性。各组分的综合作用导致在300 mV过电位下产生了666 A g的新基准质量活性。这项工作为制造具有卓越性能的电极材料开辟了一条新途径。
