Palladium-doped hierarchical ZSM-5 for catalytic selective oxidation of allylic and benzylic alcohols
AuthorsDing, Shengzhe; orcid: 0000-0003-2822-3882
Isaacs, Mark A.; orcid: 0000-0002-0335-4272
Torres Lopez, Antonio; orcid: 0000-0001-7378-1811
Fan, Xiaolei; orcid: 0000-0002-9039-6736; email: email@example.com
Parlett, Christopher M. A.; orcid: 0000-0002-3651-7314; email: firstname.lastname@example.org
MetadataShow full item record
AbstractHierarchical zeolites have the potential to provide a breakthrough in transport limitation, which hinders pristine microporous zeolites and thus may broaden their range of applications. We have explored the use of Pd-doped hierarchical ZSM-5 zeolites for aerobic selective oxidation (selox) of cinnamyl alcohol and benzyl alcohol to their corresponding aldehydes. Hierarchical ZSM-5 with differing acidity (H-form and Na-form) were employed and compared with two microporous ZSM-5 equivalents. Characterization of the four catalysts by X-ray diffraction, nitrogen porosimetry, NH3 temperature-programmed desorption, CO chemisorption, high-resolution scanning transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray absorption spectroscopy allowed investigation of their porosity, acidity, as well as Pd active sites. The incorporation of complementary mesoporosity, within the hierarchical zeolites, enhances both active site dispersion and PdO active site generation. Likewise, alcohol conversion was also improved with the presence of secondary mesoporosity, while strong Brønsted acidity, present solely within the H-form systems, negatively impacted overall selectivity through undesirable self-etherification. Therefore, tuning support porosity and acidity alongside active site dispersion is paramount for optimal aldehyde production.
CitationRoyal Society Open Science, volume 8, issue 10, page 211086
PublisherThe Royal Society
DescriptionFrom The Royal Society via Jisc Publications Router
History: received 2021-06-24, accepted 2021-08-17, collection 2021-10, pub-electronic 2021-10-20
Article version: VoR
Publication status: Published
Funder: Engineering and Physical Sciences Research Council; Id: http://dx.doi.org/10.13039/501100000266; Grant(s): Nanoscience and Nanotechnology Facility, PR16195 - National Facility for XPS (“HarwellXPS
Funder: Diamond Light Source; Id: http://dx.doi.org/10.13039/100011889; Grant(s): SP15151
Showing items related by title, author, creator and subject.
Visualization for epidemiological modelling: challenges, solutions, reflections and recommendationsDykes, Jason; orcid: 0000-0002-8096-5763; email: email@example.com; Abdul-Rahman, Alfie; orcid: 0000-0002-6257-876X; Archambault, Daniel; Bach, Benjamin; orcid: 0000-0002-9201-7744; Borgo, Rita; orcid: 0000-0003-2875-6793; Chen, Min; orcid: 0000-0001-5320-5729; Enright, Jessica; Fang, Hui; Firat, Elif E.; orcid: 0000-0001-9497-7928; Freeman, Euan; orcid: 0000-0002-6586-6951; et al. (The Royal Society, 2022-08-15)We report on an ongoing collaboration between epidemiological modellers and visualization researchers by documenting and reflecting upon knowledge constructs—a series of ideas, approaches and methods taken from existing visualization research and practice—deployed and developed to support modelling of the COVID-19 pandemic. Structured independent commentary on these efforts is synthesized through iterative reflection to develop: evidence of the effectiveness and value of visualization in this context; open problems upon which the research communities may focus; guidance for future activity of this type and recommendations to safeguard the achievements and promote, advance, secure and prepare for future collaborations of this kind. In describing and comparing a series of related projects that were undertaken in unprecedented conditions, our hope is that this unique report, and its rich interactive supplementary materials, will guide the scientific community in embracing visualization in its observation, analysis and modelling of data as well as in disseminating findings. Equally we hope to encourage the visualization community to engage with impactful science in addressing its emerging data challenges. If we are successful, this showcase of activity may stimulate mutually beneficial engagement between communities with complementary expertise to address problems of significance in epidemiology and beyond. See https://ramp-vis.github.io/RAMPVIS-PhilTransA-Supplement/. This article is part of the theme issue ‘Technical challenges of modelling real-life epidemics and examples of overcoming these’.
New insights into Perrault syndrome, a clinically and genetically heterogeneous disorder.Faridi, Rabia; orcid: 0000-0001-7788-8755; Rea, Alessandro; orcid: 0000-0002-6204-846X; Fenollar-Ferrer, Cristina; orcid: 0000-0003-4953-8891; O'Keefe, Raymond T; orcid: 0000-0001-8764-1289; Gu, Shoujun; Munir, Zunaira; orcid: 0000-0003-3342-9658; Khan, Asma Ali; orcid: 0000-0002-0894-3439; Riazuddin, Sheikh; orcid: 0000-0001-6012-0192; Hoa, Michael; orcid: 0000-0001-7469-2909; Naz, Sadaf; orcid: 0000-0002-1912-0235; et al. (2021-08-02)Hearing loss and impaired fertility are common human disorders each with multiple genetic causes. Sometimes deafness and impaired fertility, which are the hallmarks of Perrault syndrome, co-occur in a person. Perrault syndrome is inherited as an autosomal recessive disorder characterized by bilateral mild to severe childhood sensorineural hearing loss with variable age of onset in both sexes and ovarian dysfunction in females who have a 46, XX karyotype. Since the initial clinical description of Perrault syndrome 70 years ago, the phenotype of some subjects may additionally involve developmental delay, intellectual deficit and other neurological disabilities, which can vary in severity in part dependent upon the genetic variants and the gene involved. Here, we review the molecular genetics and clinical phenotype of Perrault syndrome and focus on supporting evidence for the eight genes (CLPP, ERAL1, GGPS1, HARS2, HSD17B4, LARS2, RMND1, TWNK) associated with Perrault syndrome. Variants of these eight genes only account for approximately half of the individuals with clinical features of Perrault syndrome where the molecular genetic base remains under investigation. Additional environmental etiologies and novel Perrault disease-associated genes remain to be identified to account for unresolved cases. We also report a new genetic variant of CLPP, computational structural insight about CLPP and single cell RNAseq data for eight reported Perrault syndrome genes suggesting a common cellular pathophysiology for this disorder. Some unanswered questions are raised to kindle future research about Perrault syndrome. [Abstract copyright: © 2021. This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.]
Risk Governance of Emerging Technologies Demonstrated in Terms of its Applicability to Nanomaterials.Isigonis, Panagiotis; orcid: 0000-0002-8404-7708; Afantitis, Antreas; Antunes, Dalila; Bartonova, Alena; Beitollahi, Ali; Bohmer, Nils; Bouman, Evert; Chaudhry, Qasim; Cimpan, Mihaela Roxana; Cimpan, Emil; et al. (2020-07-23)Nanotechnologies have reached maturity and market penetration that require nano-specific changes in legislation and harmonization among legislation domains, such as the amendments to REACH for nanomaterials (NMs) which came into force in 2020. Thus, an assessment of the components and regulatory boundaries of NMs risk governance is timely, alongside related methods and tools, as part of the global efforts to optimise nanosafety and integrate it into product design processes, via Safe(r)-by-Design (SbD) concepts. This paper provides an overview of the state-of-the-art regarding risk governance of NMs and lays out the theoretical basis for the development and implementation of an effective, trustworthy and transparent risk governance framework for NMs. The proposed framework enables continuous integration of the evolving state of the science, leverages best practice from contiguous disciplines and facilitates responsive re-thinking of nanosafety governance to meet future needs. To achieve and operationalise such framework, a science-based Risk Governance Council (RGC) for NMs is being developed. The framework will provide a toolkit for independent NMs' risk governance and integrates needs and views of stakeholders. An extension of this framework to relevant advanced materials and emerging technologies is also envisaged, in view of future foundations of risk research in Europe and globally. [Abstract copyright: © 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.]