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Selective reduction of nitrobenzene to aniline over electrocatalysts based on nitrogen-doped carbons containing non-noble metals
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2018-01-01 , DOI: 10.1016/j.apcatb.2017.12.079
Nick Daems , Jonatan Wouters , Cédric Van Goethem , Kitty Baert , Claude Poleunis , Arnaud Delcorte , Annick Hubin , Ivo F.J. Vankelecom , Paolo P. Pescarmona

Non-noble metals (Fe, Co or Cu) supported on N-doped carbons were investigated for the first time as electrocatalysts for the reduction of nitrobenzene to aniline in a half-cell setup. The electrocatalysts were prepared by pyrolysis of composites of activated carbon (AC) and polyaniline (PANI) with incorporated metal sites. The electrocatalyst performance was strongly influenced by the nature of the metal and by the synthesis method. For the latter, a different optimum was identified for each metal. The Cu-based electrocatalyst synthesised with a low amount of PANI and Cu relative to AC, was identified as the best electrocatalyst based on its onset potential, kinetic current density and selectivity to aniline. Most importantly, unprecedented selectivity to aniline was obtained (82%, as determined by chronoamperometry) with this electrocatalyst in a half-cell setup. This makes it a promising candidate for the electrochemical cogeneration of the industrially valuable aniline and electricity in a proton-exchange membrane fuel cell.



中文翻译:

基于含非贵金属的氮掺杂碳,在电催化剂上将硝基苯选择性还原为苯胺

首次研究了在N型掺杂碳上负载的非贵金属(Fe,Co或Cu)作为电催化剂在半电池装置中将硝基苯还原为苯胺的方法。通过热解活性碳(AC)和聚苯胺(PANI)并入金属位点的复合材料制备电催化剂。电催化剂的性能受金属性质和合成方法的强烈影响。对于后者,为每种金属确定了不同的最佳值。基于其起始电势,动电流密度和对苯胺的选择性,被合成为具有最佳PANI和相对于AC含量的Cu的Cu基电催化剂被认为是最好的电催化剂。最重要的是,获得了前所未有的对苯胺的选择性(82%,(通过计时电流法确定),并在半电池设置中使用该电催化剂。这使其成为质子交换膜燃料电池中工业上有价值的苯胺和电的电化学热电联产的有前途的候选者。

更新日期:2018-01-01
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