Hierarchical Porous Wood Cellulose Scaffold with Atomically Dispersed Pt Catalysts for Low-Temperature Ethylene Decomposition

Abstract

Despite the excellent catalytic properties of individual nanoparticles and atomic clusters, the current capabilities to assemble them into a complex system are insufficient for many practical applications. An objective of this work is to develop a fabrication technology that allows for the simultaneous control of the nanoparticle surface chemistry, elemental distribution, microscale geometry, and large-scale assembly. Using a cellulose structure derived from wood, we fabricated hierarchical porous cellulose scaffolds combined with cerium-doped TiO2. This hybrid material served as the support for atomically dispersed Pt catalysts and was used to successfully decompose ethylene at zero degrees Celsius. The fabrication concept developed in this work would allow mitigating the conflict between the required large active surfaces and the difficulties in handling nanopowders in environmental catalysis, including food preservation and indoor air purification. We thus discovered a promising route to manufacture multifunctional materials with complex structures by combining a controllable chemical synthesis with the nature-designed wood scaffold.

Elimination or Removal of Ethylene for Fruit and Vegetable Storage via Low-Temperature Catalytic Oxidation

“…Applications of catalysts in the removal of ethylene. This figure was reprinted with permission from refs ,− . Copyrights 2018 Elsevier, 2019 American Chemical Society, 2019 American Chemical Society, 2018 American Chemical Society, 2018 American Chemical Society, and 2018 American Chemical Society, respectively.…”

“…(1) Three-dimensional framework of different zeolites and (2) depicted images of mesoporous carbon, graphene, and a porous wood scaffold. This figure was reprinted with permission from refs , , , and . Copyrights 2016 Elsevier, 2019 American Chemical Society, 2018 American Chemical Society, and 2000 Elsevier, respectively.…”

“…There have been some studies regarding the catalytic oxidation of ethylene via cellulose-supported metal catalysts, realizing the recycling of waste, and achieving good catalytic performance. For instance, Guo et al prepared a kind of supported Pt catalyst using a porous wood cellulose scaffold as a support, and 80 ppm of ethylene can be completely oxidized over this Pt catalyst at room temperature . The excellent conversion efficiency of the catalyst may be attributed to the highly dispersed Pt species and the high specific surface area of the hierarchically porous wood scaffold.…”

Wood–Gelatin Bio-Composite Membranes with Tunable Flux

“…In addition, wood has been chemically modified to create wood-based membranes with novel characteristics. The resulting wood-based hybrid or composite membranes were applied for heavy metal scavenging, oil–water separation, , catalysis, ,, water purification, − energy storage, or cell cultivation …”

“…These modifications rely on chemical alteration of the wood material. They introduce functional compounds to the wood structure, such as metal and metal oxide particles ,, or organic small molecules and polymers. − Additionally, some approaches require wood delignification prior to the modification to tune certain characteristics, such as porosity or flexibility. ,, …”