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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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