One-pot synthesized boron-doped RhFe alloy with enhanced catalytic performance for hydrogen evolution reaction
One-pot synthesized boron-doped RhFe alloy with enhanced catalytic performance for hydrogen evolution reaction
复制标题
DOI：
10.1016/j.apcatb.2018.02.034
复制
发表时间：
2018-08
期刊：
影响因子：
--
通讯作者：
Lishang Zhang;Jiajia Lu;Shibin Yin;Lin Luo;Shengyu Jing;A. Brouzgou;Jian-hua Chen;P. Shen;P. T
中科院分区：
文献类型：
--
作者：
Lishang Zhang;Jiajia Lu;Shibin Yin;Lin Luo;Shengyu Jing;A. Brouzgou;Jian-hua Chen;P. Shen;P. T
电化学水裂解是一种清洁、可持续的高纯度氢气生产方法。采用一锅法合成了具有优良析氢催化性能的掺硼铑铁合金。铑-铁（RhFe）合金纳米颗粒直径在1至5 nm范围内，均匀地分布在碳载体上。结果表明，Rh：Fe = 2：1，200 °C后处理的样品（BRF 21）在0.5 M H2SO 4水溶液中的析氢性能最好，在接近零的起始电位下表现出良好的催化活性。在10 mA cm-2的电流密度下，所需的过电位约为25 mV，比市售Pt/C（29 mV）低4 mV; Tafel斜率也与Pt/C（30 mV dec-1）相当（32 mV dec-1）。本工作为制备具有高电化学析氢效率的掺硼催化剂提供了一种简便、环境友好的方法。
Electrochemical water splitting has been highly recognized as a clean and sustainable method to produce hydrogen with high purity. An one-pot method to synthesize boron-doped RhFe alloy with excellent catalytic performance for hydrogen evolution is reported in the present work. Rhodium-Iron (RhFe) alloy nanoparticles, with diameter ranging from 1 to 5 nm, are distributed uniformly on the carbon support. The corresponding physicochemical and electrochemical results display that the sample of Rh:Fe = 2:1 post-treated at 200 °C (BRF21) shows the best performance for hydrogen evolution in 0.5 M H2SO4aqueous solution; it exhibits good catalytic activity at a near zero onset potential. The required overpotential is found to be of about 25 mV at a current density of 10 mA cm–2, which is 4 mV less than that of commercial Pt/C (29 mV); the Tafel slope is also comparable (32 mV dec–1) with Pt/C (30 mV dec–1). This work may provide a facile and environmentally-friendly method to prepare B-doped catalysts with high electrochemical hydrogen evolution efficiency.