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Electrochemical Hydrogen Evolution Reaction Efficiently Catalyzed by Ru2P Nanoparticles
ChemSusChem ( IF 7.5 ) Pub Date : 2018-07-12 , DOI: 10.1002/cssc.201801103 Yuan Wang 1 , Zong Liu 1 , Hui Liu 1 , Nian‐Tzu Suen 1 , Xu Yu 1 , Ligang Feng 1
ChemSusChem ( IF 7.5 ) Pub Date : 2018-07-12 , DOI: 10.1002/cssc.201801103 Yuan Wang 1 , Zong Liu 1 , Hui Liu 1 , Nian‐Tzu Suen 1 , Xu Yu 1 , Ligang Feng 1
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Developing alternatives to Pt catalysts is a prerequisite to cost‐effectively produce hydrogen. Herein, we demonstrate Ru2P nanoparticles (without any doping and modifications) as a highly efficient Pt‐like catalyst for the hydrogen evolution reaction (HER) in different pH electrolytes. On transferring the hexagonal close‐packed crystal structure of Ru to the orthorhombic structure of Ru2P, a greatly improved catalytic activity and stability toward HER is found owing to Ru−P coordination. The electronic state change originates from the P−Ru bonding structures, which accounts for the HER activity improvement compared with Ru nanoparticles. Specifically, Ru2P nanoparticles can drive 10 mA cm−2 at a very low overpotential of 55 mV, only 8 mV more than Pt/C in an acidic solution; and an extremely low overpotential of approximately 50 mV is needed in alkaline solution, about 20 mV less than the Pt/C catalyst. The Volmer–Tafel mechanism is indicated on Ru2P nanoparticles with the typical Tafel slope of 30 mV dec−1 of Pt metal indicating a Pt‐like catalytic ability. Ru2P is more active in the Ru‐P family as H atoms prefer to adsorb on Ru atoms rather than on the P element according to theoretical calculations. Considering the low price of Ru (20 % of Pt), anti‐corrosion ability in the electrolyte, and the safe and reliable fabrication approach, the powder Ru2P nanoparticles make an excellent HER catalyst with great promise for large‐scale water electrolysis applications.
中文翻译：
Ru2P纳米粒子有效催化电化学放氢反应
开发Pt催化剂的替代品是经济高效地生产氢气的先决条件。本文中，我们证明了Ru 2 P纳米颗粒（无任何掺杂和修饰）是一种在不同pH值的电解液中用于氢释放反应（HER）的高效Pt状催化剂。通过将Ru的六方紧密堆积晶体结构转移到Ru 2 P的正交晶体结构，由于Ru-P配位，催化活性和对HER的稳定性大大提高。电子状态变化源自P-Ru键结构，与Ru纳米颗粒相比，这说明HER活性有所提高。具体而言，Ru 2 P纳米颗粒可以驱动10 mA cm -2在55 mV的极低电势下，仅比酸性溶液中的Pt / C高8 mV；碱性溶液需要极低的过电势，约为50 mV，比Pt / C催化剂低约20 mV。Volmer-Tafel机制在Ru 2 P纳米颗粒上显示出来，其典型的Tafel斜率是Pt金属的30 mV dec -1，表明了类似Pt的催化能力。Ru 2 P在Ru‐P族中更具活性，因为根据理论计算，H原子更喜欢吸附在Ru原子上而不是P元素上。考虑到Ru的价格低廉（Pt的20％），电解质的抗腐蚀能力以及安全可靠的制造方法，Ru 2粉末P纳米粒子是一种出色的HER催化剂，对于大规模水电解应用具有广阔的前景。
更新日期：2018-07-12
中文翻译：
Ru2P纳米粒子有效催化电化学放氢反应
开发Pt催化剂的替代品是经济高效地生产氢气的先决条件。本文中，我们证明了Ru 2 P纳米颗粒（无任何掺杂和修饰）是一种在不同pH值的电解液中用于氢释放反应（HER）的高效Pt状催化剂。通过将Ru的六方紧密堆积晶体结构转移到Ru 2 P的正交晶体结构，由于Ru-P配位，催化活性和对HER的稳定性大大提高。电子状态变化源自P-Ru键结构，与Ru纳米颗粒相比，这说明HER活性有所提高。具体而言，Ru 2 P纳米颗粒可以驱动10 mA cm -2在55 mV的极低电势下，仅比酸性溶液中的Pt / C高8 mV；碱性溶液需要极低的过电势，约为50 mV，比Pt / C催化剂低约20 mV。Volmer-Tafel机制在Ru 2 P纳米颗粒上显示出来，其典型的Tafel斜率是Pt金属的30 mV dec -1，表明了类似Pt的催化能力。Ru 2 P在Ru‐P族中更具活性，因为根据理论计算，H原子更喜欢吸附在Ru原子上而不是P元素上。考虑到Ru的价格低廉（Pt的20％），电解质的抗腐蚀能力以及安全可靠的制造方法，Ru 2粉末P纳米粒子是一种出色的HER催化剂，对于大规模水电解应用具有广阔的前景。
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