Doping β-CoMoO4 Nanoplates with Phosphorus for Efficient Hydrogen Evolution Reaction in Alkaline Media,ACS Applied Materials & Interfaces

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Doping β-CoMoO4 Nanoplates with Phosphorus for Efficient Hydrogen Evolution Reaction in Alkaline Media
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-10-04 00:00:00 , DOI: 10.1021/acsami.8b13266
Shu Li ₁ , Nan Yang ₁ , Li Liao ₁ , Yanzhu Luo ₁ , Shengyao Wang ₁ , Feifei Cao ₁ , Wei Zhou ₂ , Dekang Huang ₁ , Hao Chen ₁

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Mass production of hydrogen by electrolysis of water largely hinges on the development of highly efficient and economical electrocatalysts for hydrogen evolution reaction (HER). Though having the merits of high earth abundance, easy availability, and tunable composition, transition-metal oxides are usually deemed as poor electrocatalysts for HER. Herein, we demonstrate that doping β-CoMoO₄ nanoplates with phosphorus can turn them into active electrocatalysts for HER. Theoretical calculation and experimental studies unravel that enhanced electrical conductivity and optimized hydrogen adsorption free energy are major causes for the improvement of intrinsic activity. As a result, only an overpotential of 138 mV is required to drive hydrogen evolving at a current density of 10 mA cm^–2 in 1 M KOH for P-doped β-CoMoO₄, which outstrips many recently reported transition-metal oxides and is just slightly inferior to commercial Pt/C. This work opens a new route to tune the HER performance of transition-metal oxides.

中文翻译：

掺杂β-的CoMoO ₄纳米片与磷在碱性介质的有效析氢反应

通过水的电解大量生产氢在很大程度上取决于用于氢析出反应（HER）的高效且经济的电催化剂的开发。尽管具有高地球丰度，易于获得和可调整组成的优点，但过渡金属氧化物通常被认为是HER的不良电催化剂。在本文中，我们表明，掺杂β-的CoMoO _4个纳米片与磷可以把它们变成为HER活性电催化剂。理论计算和实验研究表明，提高电导率和优化氢吸附自由能是提高固有活性的主要原因。结果，仅需138 mV的超电势就能驱动氢以10 mA cm ^–2的电流密度逸出在1M KOH为P型掺杂的β-的CoMoO ₄，这超过了许多最近报道过渡金属氧化物和仅仅稍逊于商业的Pt / C。这项工作为调整过渡金属氧化物的HER性能开辟了一条新途径。

更新日期：2018-10-04

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