High Performance Electrocatalytic Reaction of Hydrogen and Oxygen on Ruthenium Nanoclusters.
High Performance Electrocatalytic Reaction of Hydrogen and Oxygen on Ruthenium Nanoclusters.
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DOI：
10.1021/acsami.6b15725
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发表时间：
2017-01
影响因子：
9.5
通讯作者：
Ruquan Ye;Yuanyue Liu;Zhiwei Peng;Tuo Wang;A. Jalilov;B. Yakobson;S. Wei;J. Tour
中科院分区：
文献类型：
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作者：
Ruquan Ye;Yuanyue Liu;Zhiwei Peng;Tuo Wang;A. Jalilov;B. Yakobson;S. Wei;J. Tour
开发高反应速率、低过电位的氢氧化、析氢、氧还原或析氧反应的催化材料是可再生能源发展的关键目标。本文报道了氮掺杂石墨烯上的Ru(0)纳米团簇作为析氢反应（HER）和氧还原反应（ORR）的高性能多功能催化剂，在碱性溶液中表现出与商业Pt/C相似的活性。对于碱性介质中的HER性能，样品Ru/NG-750在过电位为8 mV时达到10 mA cm-2， Tafel斜率为30 mV / 12。大多数ORR和OER催化剂在碱性溶液中降解，而在酸性电解质中降解，因此在碱性溶液中具有较高的HER性能是有利的。对于ORR性能，Ru/NG在与Pt/C相当的电流密度下，通过4e过程有效地催化O2转化为OH-。本文报道的Ru(0)纳米团簇的不同寻常的催化活性是推动可再生能源转化反应的重要发现。
The development of catalytic materials for the hydrogen oxidation, hydrogen evolution, oxygen reduction or oxygen evolution reactions with high reaction rates and low overpotentials are key goals for the development of renewable energy. We report here Ru(0) nanoclusters supported on nitrogen-doped graphene as high-performance multifunctional catalysts for the hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR), showing activities similar to that of commercial Pt/C in alkaline solution. For HER performance in alkaline media, sample Ru/NG-750 reaches 10 mA cm-2 at an overpotential of 8 mV with a Tafel slope of 30 mV dec-1. The high HER performance in alkaline solution is advantageous because most catalysts for ORR and oxygen evolution reaction (OER) also prefer alkaline solution environment whereas degrade in acidic electrolytes. For ORR performance, Ru/NG effectively catalyzes the conversion of O2 into OH- via a 4e process at a current density comparable to that of Pt/C. The unusual catalytic activities of Ru(0) nanoclusters reported here are important discoveries for the advancement of renewable energy conversion reactions.