Network-Like Platinum Nanosheets Enabled by a Calorific-Effect-Induced-Fusion Strategy for Enhanced Catalytic Hydrogenation Performance.
Network-Like Platinum Nanosheets Enabled by a Calorific-Effect-Induced-Fusion Strategy for Enhanced Catalytic Hydrogenation Performance.
复制标题
通过热效应诱导融合策略实现网络状铂纳米片，以增强催化苯乙烯加氢性能
DOI：
10.3389/fchem.2021.818900
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发表时间：
2021
影响因子：
5.5
通讯作者：
Guo L
中科院分区：
文献类型：
--
作者：
Chen TW;Pang DW;Kang JX;Zhang DF;Guo L
在本文中，我们报告的网络状铂（Pt）纳米片的基础上，Pt/还原氧化石墨（Pt/rGO）的杂化材料的建设微妙地利用钙效应诱导融合策略。微小的Pt物种首先催化H2-O2结合反应。释放的热量触发了在Pt物质催化的辅助下的rGO衬底的燃烧，这诱导微小的Pt物质融合成网络状纳米片结构。Pt在rGO上的负载量和分散性是成功构建网状Pt纳米片的关键。所制备的产物具有优异的催化加氢活性和对烯烃、硝基苯等不饱和键的上级稳定性。苯乙烯在60 min内可完全转化为乙苯。网络状Pt纳米片的转换频率（TOF）值高达158.14 h-1，是自制Pt纳米颗粒的三倍，是在类似条件下报道的无载体Pt催化剂的最高值之一。此外，该网络状结构的良好的分散性和优异的抗聚集性赋予催化剂优异的可循环性。经过5次循环实验，转化率几乎没有下降。
In this paper, we report the construction of network-like platinum (Pt) nanosheets based on Pt/reduced graphite oxide (Pt/rGO) hybrids by delicately utilizing a calorific-effect-induced-fusion strategy. The tiny Pt species first catalyzed the H2-O2 combination reaction. The released heat triggered the combustion of the rGO substrate under the assistance of the Pt species catalysis, which induced the fusion of the tiny Pt species into a network-like nanosheet structure. The loading amount and dispersity of Pt on rGO are found to be crucial for the successful construction of network-like Pt nanosheets. The as-prepared products present excellent catalytic hydrogenation activity and superior stability towards unsaturated bonds such as olefins and nitrobenzene. The styrene can be completely converted into phenylethane within 60 min. The turnover frequency (TOF) value of network-like Pt nanosheets is as high as 158.14 h−1, which is three times higher than that of the home-made Pt nanoparticles and among the highest value of the support-free bimetallic catalysts ever reported under similar conditions. Furthermore, the well dispersibility and excellent aggregation resistance of the network-like structure endows the catalyst with excellent recyclability. The decline of conversion could be hardly identified after five times recycling experiments.