Dandelion-like cobalt oxide microsphere-supported RuCo bimetallic catalyst for highly efficient hydrogenolysis of 5-hydroxymethylfurfural
Dandelion-like cobalt oxide microsphere-supported RuCo bimetallic catalyst for highly efficient hydrogenolysis of 5-hydroxymethylfurfural
复制标题
蒲公英状氧化钴微球负载RuCo双金属催化剂用于5-羟甲基糠醛高效氢解
DOI：
10.1016/j.apcatb.2018.06.026
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发表时间：
2018-12-05
影响因子：
22.1
通讯作者：
Li, Feng
中科院分区：
文献类型：
--
作者：
Gao, Zhi;Fan, Guoli;Li, Feng
目前，由于化石燃料的快速消耗以及由此带来的日益严重的环境污染，可再生生物质衍生能源及其转化技术正引起人们的广泛关注。本文采用一锅包埋法制备了一种新型蒲公英类钴氧化物(CoOx)微球负载双金属RuCo催化剂，并将其用于5-羟甲基呋喃(HMF)氢解制备液体2，5-二甲基呋喃(DMF)生物燃料。研究发现，双金属RuCo纳米粒子(NPs)平均尺寸约为2.5 nm，可以均匀分散在表面缺陷丰富的花状CoOx微球上。氧空位和Co2+物种)同时构建。所制备的RuCo/CoOx催化剂在上述反应中表现出了良好的催化性能，当HMF/Ru摩尔比为252.7时，DMF收率达到96.5%，这与双金属RuCo纳米粒子与金属-载体界面丰富的表面缺陷之间的独特协同作用，以及催化剂增强的氢溢出效应和蒲公英式的超结构有关。此外，RuCo物种与RuCo/CoOx中的CoOx基质之间的强烈相互作用显著地阻止了RuCo纳米粒子在反应过程中的迁移、聚集和淋溶。本研究结果为设计适用于多种多相催化体系的高效、稳定的双金属催化剂提供了新的途径。
Currently, renewable biomass-derived energy sources and related transformation technologies are attracting numerous attentions due to the rapid consumption of fossil fuels and resulting increasing environmental pollution. Herein, a new dandelion-like cobalt oxide (CoOx) microsphere-supported bimetallic RuCo catalyst was fabricated by a simple one-pot embedding method and employed for the 5-hydroxymethylfurfural (HMF) hydrogenolysis to produce liquid 2,5-dimethylfuran (DMF) biofuel. It was found that bimetallic RuCo nanoparticles (NPs) with the average size of about 2.5 nm could homogeneously disperse on flower-like CoOx microspheres possessing abundant surface defects (Le. oxygen vacancies and Co2+ species) simultaneously constructed. As fabricated RuCo/CoOx catalyst exhibited excellent catalytic performance in above reaction, along with a quite high DMF yield of 96.5% at a high HMF/Ru molar ratio of 252.7, which was corelated with the unique synergy between bimetallic RuCo NPs and abundant surface defects at the metal-support interface, as well as the enhanced hydrogen spillover effect and the dandelion-like superstructure of the catalyst. Additionally, the strong interactions between RuCo species and the CoOx matrix in the RuCo/CoOx significantly prevented RuCo NPs from migration, aggregation, and leaching during the reaction. The present findings offer a new approach for designing other highly efficient and stable bimetallic catalysts applied in a variety of heterogeneous catalytic systems.