Interface Engineering of Needle‐Like P‐Doped MoS2/CoP Arrays as Highly Active and Durable Bifunctional Electrocatalyst for Overall Water Splitting,ChemSusChem

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Interface Engineering of Needle‐Like P‐Doped MoS2/CoP Arrays as Highly Active and Durable Bifunctional Electrocatalyst for Overall Water Splitting
ChemSusChem ( IF 7.5 ) Pub Date : 2021-01-23 , DOI: 10.1002/cssc.202002873
Yan Hu ₁ , Hongbo Yu ₁ , Luoluo Qi ₁ , Jiaxin Dong ₁ , Puxuan Yan ₁ , Tayirjan Taylor Isimjan ₂ , Xiulin Yang ₃

Affiliation

Developing a bifunctional water splitting catalyst with high efficiency and low cost are crucial in the electrolysis water industry. Here, we report a rational design and simple preparation method of MoS₂‐based bifunctional electrocatalyst on carbon cloth (CC). The optimized P‐doped MoS₂@CoP/CC catalyst presents low overpotentials for the hydrogen (HER) and oxygen evolution reactions (OER) of 64 and 282 mV in alkaline solution as well as 72 mV HER overpotential in H₂SO₄ at a current density of 10 mA cm⁻². Furthermore, P‐MoS₂@CoP/CC as a bifunctional catalyst delivered relatively low cell voltages of 1.83 and 1.97 V at high current densities of 500 and mA cm⁻² in 30 % KOH. The two‐electrode system showed a remarkable stability for 30 h, even outperformed the benchmark RuO₂||Pt/C catalyst. The excellent electrochemical performance can be credited to the unique microstructure, high surface area, and the synergy between metal species. This study presents a possible alternative for noble metal‐based catalysts to overcome the challenges of industrial applications.

中文翻译：

针状P掺杂MoS2 / CoP阵列的界面工程，作为高活性和耐用性的双功能电催化剂，可用于总水分解

在电解水工业中，开发高效，低成本的双功能水分解催化剂至关重要。在这里，我们报告了碳布（CC）上基于MoS ₂的双功能电催化剂的合理设计和简单制备方法。经过优化的P掺杂MoS ₂ @ CoP / CC催化剂在碱性溶液中的氢气（HER）和氧气逸出反应（OER）在碱性溶液中为64和282 mV，在H ₂ SO ₄中的过电位为72 mV 。电流密度为10 mA cm ^-2。此外，作为双功能催化剂的P-MoS ₂ @ CoP / CC在500和mA cm ^-2的高电流密度下可提供1.83和1.97 V的较低电池电压在30％KOH中。两电极系统在30小时内表现出显着的稳定性，甚至优于基准RuO ₂ || Pt / C催化剂。优异的电化学性能可归因于独特的微观结构，高表面积以及金属物种之间的协同作用。这项研究为贵金属催化剂提供了可能的替代品，以克服工业应用的挑战。

更新日期：2021-03-23

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