A series of 3D self-standing PtRu/Ni(OH)2/NF electrodes is fabricated for electrocatalytic hydrogenation (ECH) of benzoic acid (BA) to cyclohexanecarboxylic acid (CCA). The PtRu/Ni(OH)2 electrocatalyst with a unique coral-shaped architecture possesses outstanding charge transfer ability and abundant active sites. The optimized electrode achieves a BA conversion of 99.00% and a CCA selectivity of 100% in 0.05 M H2SO4 within 80 min, showing a record faradaic efficiency of 43.90% and high performance during 20 cycles of ECH. In situ Raman tests verify the mechanism of the selective hydrogenation of the aromatic ring and density functional theory (DFT) calculations reveal that the electronic interaction between Pt and Ru in the PtRu nanoalloy as well as the electron transfer from the PtRu alloy to the Ni(OH)2 nanosheet tunes the electronic states of PtRu/Ni(OH)2, thereby enhancing the adsorption strength of BA on the electrocatalyst surface. This work offers a promising alternative to the traditional catalytic hydrogenation of BA.
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机译：一系列的3 d独立PtRu / Ni (OH) 2 / NF电极是electrocatalytic捏造加氢(决定)苯甲酸(BA)PtRu / Ni (OH) 2 electrocatalyst独特coral-shaped架构拥有杰出的电荷转移能力和丰富的活动网站。99.00%的转换和CCA的选择性100%在0.05 M硫酸80分钟内,显示记录感应电流的43.90%,效率高表现在20周期的决定。拉曼测试验证选择性的机制氢化芳环和密度泛函理论(DFT)计算表明电子相互作用Pt和俄文的PtRu nanoalloy以及电子转移从PtRu合金镍(OH) 2nanosheet曲调的电子状态PtRu / Ni (OH) 2,从而提高吸附英航electrocatalyst表面的力量。这项工作提供了一个有前途的替代英航的传统催化加氢。
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