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An Efficient RuTe2 /Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte.
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-07-22 , DOI: 10.1002/asia.202000734 Xiaocong Gu 1 , Xudong Yang 1 , Ligang Feng 1
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-07-22 , DOI: 10.1002/asia.202000734 Xiaocong Gu 1 , Xudong Yang 1 , Ligang Feng 1
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Developing efficient powder catalysts for hydrogen evolution reaction (HER) in the acidic electrolyte is significant for hydrogen generation in the proton exchange membrane (PEM) water electrolysis technique. Herein, we demonstrated an efficient catalyst for HER in the acid media based on the graphene supported ruthenium telluride nanoparticles (RuTe2/Gr). The catalysts were easily fabricated by a facile microwave irradiation/thermal annealing approach, and orthorhombic RuTe2 crystals were found anchored over the graphene surface. The defective structure was demonstrated in the aberration‐corrected transmission electron microscopy images for RuTe2 crystals and graphene support. This catalyst required an overpotential of 72 mV to drive 10 mA cm−2 for HER when loading on the inert glass carbon electrode; Excellent catalytic stability in acidic media was also observed to offer 10 mA cm−2 for 10 hours. The Volmer‐Tafel mechanism was indicated on RuTe2/Gr catalyst by Tafel slope of 33 mV dec−1, similar to that of Pt/C catalysts. The high catalytic performance of RuTe2/Gr could be attributed to its high dispersion on the graphene surface, high electrical conductivity and low charge transfer resistance. This powder catalyst has potential application in the PEM water electrolysis technique because of its low cost and high stability.
中文翻译：
一种高效的RuTe2 /石墨烯催化剂，用于酸性电解质中的氢气发生放氢反应。
在质子交换膜（PEM）水电解技术中，开发用于酸性电解质中氢释放反应（HER）的高效粉末催化剂对于氢的产生具有重要意义。在本文中，我们证明了基于石墨烯负载的碲化钌纳米颗粒（RuTe 2 / Gr）的高效HER在酸性介质中的催化剂。可以通过简便的微波辐射/热退火方法轻松制备催化剂，并且发现正交晶状的RuTe 2晶体锚固在石墨烯表面上。RuTe 2晶体和石墨烯载体的像差校正透射电子显微镜图像证明了缺陷结构。该催化剂需要72 mV的超电势才能驱动10 mA cm -2当装载在惰性玻璃碳电极上时用于HER；还观察到在酸性介质中优异的催化稳定性，可提供10 mA cm -2达10小时。Volmer-Tafel机理在RuTe 2 / Gr催化剂上以33 mV dec -1的Tafel斜率表明，与Pt / C催化剂相似。RuTe 2 / Gr的高催化性能归因于其在石墨烯表面的高分散性，高电导率和低电荷转移阻力。该粉末催化剂由于其低成本和高稳定性而在PEM水电解技术中具有潜在的应用。
更新日期：2020-09-14
中文翻译：
一种高效的RuTe2 /石墨烯催化剂，用于酸性电解质中的氢气发生放氢反应。
在质子交换膜（PEM）水电解技术中，开发用于酸性电解质中氢释放反应（HER）的高效粉末催化剂对于氢的产生具有重要意义。在本文中，我们证明了基于石墨烯负载的碲化钌纳米颗粒（RuTe 2 / Gr）的高效HER在酸性介质中的催化剂。可以通过简便的微波辐射/热退火方法轻松制备催化剂，并且发现正交晶状的RuTe 2晶体锚固在石墨烯表面上。RuTe 2晶体和石墨烯载体的像差校正透射电子显微镜图像证明了缺陷结构。该催化剂需要72 mV的超电势才能驱动10 mA cm -2当装载在惰性玻璃碳电极上时用于HER；还观察到在酸性介质中优异的催化稳定性，可提供10 mA cm -2达10小时。Volmer-Tafel机理在RuTe 2 / Gr催化剂上以33 mV dec -1的Tafel斜率表明，与Pt / C催化剂相似。RuTe 2 / Gr的高催化性能归因于其在石墨烯表面的高分散性，高电导率和低电荷转移阻力。该粉末催化剂由于其低成本和高稳定性而在PEM水电解技术中具有潜在的应用。
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