Graphite Carbon Nitride‐Assisted Ruthenium/Reduced Graphene Oxide as High‐Efficiency Electrocatalyst for Hydrogen Evolution Reaction under Alkaline Conditions,ChemElectroChem

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Graphite Carbon Nitride‐Assisted Ruthenium/Reduced Graphene Oxide as High‐Efficiency Electrocatalyst for Hydrogen Evolution Reaction under Alkaline Conditions
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-06-15 , DOI: 10.1002/celc.202000681
Tao Wang ₁ , Hongzhi Yuan ₁ , Juhong Zhou ₁ , Binbin Jiang _{1,

2} , Yinchun Gao ₁ , Laiguo Wang ₁ , Tao Pang ₁ , Konglin Wu ₂

Affiliation

Exploring the high activity and stability of HER electrocatalysts in alkaline media is highly desirable. In this paper, a facile hydrothermal method is proposed for synthesizing the Ru decorated graphite carbon nitride/reduced graphene oxide (Ru‐CN‐rGO), which can be used as efficient electrocatalysts in alkaline media. The optimal Ru‐CN‐rGO (Ru: 4.4 wt%) exhibits enhanced electrocatalytic activity than these of Ru/C and Pt/C, which requires a low overpotential (45 mV) to derive a current density of 10 mA cm⁻², a small Tafel slope (40.0 mV dec⁻¹) and a large exchange current density (1.13 mA cm⁻²). More importantly, the obtained Ru‐CN‐rGO exhibits the long‐term stability in alkaline electrolyte. The comparable results reveal that the CN can adjust the electronic structure of Ru, which is beneficial for accelerating the kinetics reaction, resulting in excellent HER performances. This work provides a new strategy for designing the efficient electrocatalyst.

中文翻译：

石墨氮化碳辅助钌/还原石墨烯作为碱性条件下氢气发生反应的高效电催化剂

非常需要在碱性介质中探索HER电催化剂的高活性和稳定性。本文提出了一种简便的水热法来合成Ru修饰的石墨碳氮化物/还原氧化石墨烯（Ru-CN-rGO），可用作碱性介质中的高效电催化剂。最佳的Ru-CN-rGO（Ru：4.4 wt％）表现出比Ru / C和Pt / C更高的电催化活性，后者需要低的超电势（45 mV）才能获得10 mA cm ^-2的电流密度，塔菲尔斜率小（40.0 mV dec ^-1）和交换电流密度大（1.13 mA cm ^-2））。更重要的是，所获得的Ru-CN-rGO在碱性电解液中具有长期稳定性。可比较的结果表明，CN可以调节Ru的电子结构，这有利于加速动力学反应，从而具有出色的HER性能。这项工作为设计高效电催化剂提供了新的策略。

更新日期：2020-08-03

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