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Implanting Atomic Dispersed Ru in PtNi Colloidal Nanocrystal Clusters for Efficient Catalytic Performance in Electro-oxidation of Liquid Fuels.
Chemistry - A European Journal ( IF 4.3 ) Pub Date : 2020-09-21 , DOI: 10.1002/chem.202003373
Binsheng Li 1 , Shaohan Yang 1 , Guozhu Chen 1 , Cuncheng Li 1 , Yipin Lv 1 , Xiaodong Yang 1 , Daowei Gao 1
Affiliation  

Although PtRu alloy nanocatalysts have been certified to possess excellent electrocatalytic performance and CO‐poisoning tolerance toward formic acid and methanol electro‐oxidation, the unaffordable usages of ruthenium (Ru) and platinum (Pt) have greatly limited their widespread adoption. Here, a facile one‐pot method is reported for implanting atomic dispersed Ru in PtNi colloidal nanocrystal clusters with different Ru/Pt/Ni molar ratios, greatly reducing the dosages of Pt and Ru, and further improving the catalytic performances for the electro‐oxidation of formic acid and methanol. Through simple control of the amount of Ni(acac)2 precursor, trimetallic Ru0.3Pt70.5Ni29.2, Ru0.6Pt55.9Ni43.5, Ru0.2Pt77.3Ni22.5, and Ru0.9Pt27.3Ni71.8 colloidal nanocrystal clusters (CNCs) are obtained. In particular, the Ru0.3Pt70.5Ni29.2 CNCs exhibit excellent specific activities for formic acid and methanol electro‐oxidation, that is, 14.2 and 15.3 times higher, respectively, than those of the Pt/C catalyst. Moreover, the Ru0.3Pt70.5Ni29.2 CNCs also possess better anti‐CO‐poisoning properties and diffusion ability than the other RuPtNi CNCs. The excellent formic acid and methanol electro‐oxidation activities of RuPtNi CNCs are ascribed to the optimal ligand effects derived from the Pt, Ni, and atomic dispersed Ru atoms, which can improve the OH adsorption ability and further the anti‐CO‐poisoning capability. This research opens a new door for increasing the electro‐oxidation properties of liquid fuels by using lower dosages of noble metals in Pt‐based catalysts.

中文翻译:

将PtNi胶态纳米晶体簇中的原子分散Ru注入,以在液体燃料的电氧化中实现高效催化性能。

尽管PtRu合金纳米催化剂已被证明具有出色的电催化性能以及对甲酸和甲醇电氧化的CO中毒耐受性,但是钌(Ru)和铂(Pt)的难以承受的使用极大地限制了它们的广泛采用。在这里,据报道一种简便的单锅法将原子分散的Ru注入具有不同Ru / Pt / Ni摩尔比的PtNi胶体纳米晶体簇中,大大减少了Pt和Ru的用量,并进一步提高了电氧化的催化性能。甲酸和甲醇。通过简单控制Ni(acac)2前体的量,三金属Ru 0.3 Pt 70.5 Ni 29.2,Ru 0.6 Pt 55.9获得Ni 43.5,Ru 0.2 Pt 77.3 Ni 22.5和Ru 0.9 Pt 27.3 Ni 71.8胶体纳米晶体簇(CNC)。特别是,Ru 0.3 Pt 70.5 Ni 29.2 CNCs对甲酸和甲醇的电氧化表现出优异的比活性,分别是Pt / C催化剂的14.2和15.3倍。此外,Ru 0.3 Pt 70.5 Ni 29.2CNC还比其他RuPtNi CNC具有更好的抗CO中毒特性和扩散能力。RuPtNi CNCs优异的甲酸和甲醇电氧化活性归因于Pt,Ni和原子分散的Ru原子产生的最佳配体效应,可以提高OH的吸附能力,并进一步提高抗CO中毒能力。这项研究通过在Pt基催化剂中使用较低剂量的贵金属,为提高液体燃料的电氧化性能打开了一扇新的大门。
更新日期:2020-09-21
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