Strong Electronic Interaction Enhanced Electrocatalysis of Metal Sulfide Clusters Embedded Metal–Organic Framework Ultrathin Nanosheets toward Highly Efficient Overall Water Splitting,Advanced Science

当前位置： X-MOL 学术 › Adv. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Strong Electronic Interaction Enhanced Electrocatalysis of Metal Sulfide Clusters Embedded Metal–Organic Framework Ultrathin Nanosheets toward Highly Efficient Overall Water Splitting
Advanced Science ( IF 14.3 ) Pub Date : 2020-09-21 , DOI: 10.1002/advs.202001965
Ming Zhao ₁ , Wei Li ₁ , Junying Li ₁ , Weihua Hu ₁ , Chang Ming Li _{1,

2,

3}

Affiliation

Unique metal sulfide (MS) clusters embedded ultrathin nanosheets of Fe/Ni metal–organic framework (MOF) are grown on nickel foam (NiFe‐MS/MOF@NF) as a highly efficient bifunctional electrocatalyst for overall water splitting. It exhibits remarkable catalytic activity and stability toward both the oxygen evolution reaction (OER, ƞ = 230 mV at 50 mA cm⁻²) and hydrogen evolution reaction (HER, ƞ = 156 mV at 50 mA cm⁻²) in alkaline media, and bi‐functionally catalyzes overall alkaline water splitting at a current density of 50 mA cm⁻² by 1.74 V cell voltage without iR compensation. The enhancement mechanism is ascribed to the impregnated metal sulfide clusters in the nanosheets, which not only promote the formation of ultrathin nanosheet to greatly enlarge the reaction surface area while offering high electric conductivity, but more importantly, efficiently modulate the electronic structure of the catalytically active atom sites to an electron‐rich state via strong electronic interaction and strengthen the adsorption of oxygenate intermediate to facilitate fast electrochemical reactions. This work reports a highly efficient HER/OER bifunctional electrocatalyst and may shed light on the rational design and synthesis of uniquely structured MOF‐derived catalysts.

中文翻译：

强电子相互作用增强金属硫化物簇的电催化嵌入金属有机框架超薄纳米片实现高效整体水分解

嵌入 Fe/Ni 金属有机骨架 (MOF) 超薄纳米片的独特金属硫化物 (MS) 簇生长在泡沫镍 (NiFe-MS/MOF@NF) 上，作为用于整体水分解的高效双功能电催化剂。它在碱性介质中对析氧反应（OER，ƞ = 230 mV at 50 mA cm ^-2）和析氢反应（HER，ƞ = 156 mV at 50 mA cm ^-2 ）表现出显着的催化活性和稳定性。双功能催化整体碱性水分解，电流密度为 50 mA cm ^-2，电池电压为 1.74 V，无需iR补偿。增强机制归因于纳米片中浸渍的金属硫化物簇，这不仅促进了超薄纳米片的形成，大大扩大了反应表面积，同时提供了高电导率，更重要的是，有效地调节了催化活性的电子结构通过强电子相互作用使原子位点形成富电子状态，并加强含氧中间体的吸附，以促进快速电化学反应。这项工作报道了一种高效的 HER/OER 双功能电催化剂，并可能为独特结构的 MOF 衍生催化剂的合理设计和合成提供线索。

更新日期：2020-10-22

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11