Johnson Matthey Technology Review最新文献_第10页

Perspective on the Criticality of Palladium in Organic Synthesis 钯在有机合成中的临界性展望

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2022-01-01 DOI: 10.1595/205651323x16698159435925

Emma R. Schofield

引用次数: 1

“Digitalization” “数字化”

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2022-01-01 DOI: 10.1595/205651322x16438153587355

Flora Chen, R. Head, Brendan Strijdom, Phil Stone

引用次数: 0

Direct Ammonia Fuel Cells: A General Overview, Current Technologies and Future Directions 直接氨燃料电池:综述、当前技术和未来方向

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2022-01-01 DOI: 10.1595/205651322x16584143272416

Andrew Cai, Zoe Rozario

{"title":"Direct Ammonia Fuel Cells: A General Overview, Current Technologies and Future Directions","authors":"Andrew Cai, Zoe Rozario","doi":"10.1595/205651322x16584143272416","DOIUrl":"https://doi.org/10.1595/205651322x16584143272416","url":null,"abstract":"Ammonia will be utilized as a key energy vector for storage and long-distance transport in the developing hydrogen economy. Direct ammonia fuel cells have the potential to decrease the process complexity of current fuel cell technology and therefore increases overall efficiency and unit footprint where implemented. In this paper, current direct ammonia fuel cell technologies are explored, such as SOFC-O, SOFC-H, alkaline, and ammonia borane fuel cells. From this, it is shown that SOFC-O have high experimental power outputs of 1100 mW/cm2 but has disadvantages of high NOx production, lower fuel utilisation and low efficiency. Alkaline and ammonia borane fuel cells have lesser interest due to complex ammonia pre-treatment, high NOx production and lower power outputs of 450 mW/cm2 and 110 mW/cm2 respectfully. SOFC-H seem to have the most potential due to high theoretical power outputs, high efficiency, increased fuel utilisation and low NOx production. DAFC technology has yet to reach full commercialisation, but as the hydrogen economy develops the potential benefits of DAFCs in complexity and footprint reduction will drive further investment and development, particularly in the shipping sector.","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":"42 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67350898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Professor Geoffrey Bond: ‘Mr Gold’ International Expert in Gold Catalysis 1927–2022 杰弗里·邦德教授:1927-2022年国际黄金催化专家“黄金先生”

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2022-01-01 DOI: 10.1595/205651322x16546085782525

J. Bond

引用次数: 0

MACBETH: A Revolution in Catalytic Reaction Technology 麦克白:催化反应技术的革命

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2022-01-01 DOI: 10.1595/205651323x16710342184187

F. Stenger, R. Franke, F. Gallucci, David Liese, Angelini Fabio, Vittoria Cosentino

引用次数: 0

A Conflict of Fineness and Stability: Platinum- and Palladium-Based Bulk Metallic Glasses for Jewellery: Part I 细度和稳定性的冲突:珠宝用铂和钯基大块金属玻璃:第1部分

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2021-10-01 DOI: 10.1595/205651321x16045078967011

O. S. Houghton, A. L. Greer

{"title":"A Conflict of Fineness and Stability: Platinum- and Palladium-Based Bulk Metallic Glasses for Jewellery: Part I","authors":"O. S. Houghton, A. L. Greer","doi":"10.1595/205651321x16045078967011","DOIUrl":"https://doi.org/10.1595/205651321x16045078967011","url":null,"abstract":"\u0000 For the metals used in jewellery, high hardness and the associated scratch resistance are much sought after. Conventional crystalline alloys for jewellery are alloyed and extensively processed (thermally and mechanically) to improve hardness, but it is difficult to reach values beyond 300 HV. The advent of bulk metallic glasses (BMGs), based on precious metals and with hardness exceeding 300 HV in the as-cast state, is therefore of great interest for both jewellery and watchmaking. The non-crystalline structure of these materials not only gives high hardness, but also the opportunity to shape metals like plastics, via thermoplastic forming (TPF). For more traditional jewellery manufacture, BMGs also exhibit high-definition and near-net-shape casting. Gold-based alloys have long dominated the consideration of BMGs for jewellery as they can comply with 18 karat hallmarks. Although BMGs based on platinum or palladium possess excellent thermoplastic formability and are without known tarnishing problems, achieving useful glass-forming ability (GFA) within the more restrictive hallmarking standards typically used for jewellery (≥95 wt% platinum or palladium) is at best challenging. In this two-part review, platinum- and palladium-based BMGs are discussed, focusing on their potential application in jewellery and on the further research that is necessary.\u0000","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45802536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Using Surface Science Techniques to Investigate the Interaction of Acetonitrile with Dust Grain Analogue Surfaces 利用表面科学技术研究乙腈与尘粒相似表面的相互作用

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2021-07-15 DOI: 10.1595/205651321x16264409352535

Emily R. Ingman, Amber Shepherd, W. A. Brown

{"title":"Using Surface Science Techniques to Investigate the Interaction of Acetonitrile with Dust Grain Analogue Surfaces","authors":"Emily R. Ingman, Amber Shepherd, W. A. Brown","doi":"10.1595/205651321x16264409352535","DOIUrl":"https://doi.org/10.1595/205651321x16264409352535","url":null,"abstract":"\u0000 Surface science methodologies, such as reflection-absorption infrared spectroscopy (RAIRS) and temperature programmed desorption (TPD), are ideally suited to studying the interaction of molecules with model astrophysical surfaces. Here we describe the use of RAIRS and TPD to investigate the adsorption, interactions and thermal processing of acetonitrile and water containing model ices grown under astrophysical conditions on a graphitic dust grain analogue surface. Experiments show that acetonitrile physisorbs on the graphitic surface at all exposures. At the lowest coverages, repulsions between the molecules lead to a decreasing desorption energy with increasing coverage. Analysis of TPD data gives monolayer desorption energies ranging from 28.8 - 39.2 kJ mol-1 and an average multilayer desorption energy of 43.8 kJ mol-1. When acetonitrile is adsorbed in the presence of water ice, the desorption energy of monolayer acetonitrile shows evidence of desorption with a wide range of energies. An estimate of the desorption energy of acetonitrile from CI shows that it is increased to ~37 kJ mol-1 at the lowest exposures of acetonitrile. Amorphous water ice also traps acetonitrile on the graphite surface past its natural desorption temperature, leading to volcano and co-desorption. RAIRS data show that the C≡N vibration shifts, indicative of an interaction between the acetonitrile and the water ice surface.\u0000","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49322280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Innovation in Fischer-Tropsch: A Sustainable Approach to Fuels Production : A cost-effective method of converting any carbon source into high-quality liquid hydrocarbon fuels 费托创新:燃料生产的可持续途径:一种将任何碳源转化为高质量液态烃燃料的经济有效方法

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2021-07-01 DOI: 10.1595/205651321X16143384043486

R. Pearson, A. Coe, J. Paterson

引用次数: 2

Editorial: Sustainable Industrial Processes 社论:可持续的工业过程

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2021-07-01 DOI: 10.1595/205651321X16158077463566

S. Coles

引用次数: 0

“Palladium Assisted Synthesis of Heterocycles” : By Navjeet Kaur (Banasthali University, Rajastan, India), Taylor & Francis Group LLC, Boca Raton, USA, 2019, 444 pages, ISBN: 978-0-815-37425-1, 180.00, US$240.00 “钯辅助杂环合成”：Navjeet Kaur（印度拉贾斯坦邦Banasthali大学），Taylor&Francis Group LLC，美国博卡拉顿，2019，444页，ISBN:978-0-815-37425-1，180.00，240.00美元