نتایج جستجو برای: supported platinum

تعداد نتایج: 215015  

2017
Colleen Jackson Graham T Smith David W Inwood Andrew S Leach Penny S Whalley Mauro Callisti Tomas Polcar Andrea E Russell Pieter Levecque Denis Kramer

Catalysing the reduction of oxygen in acidic media is a standing challenge. Although activity of platinum, the most active metal, can be substantially improved by alloying, alloy stability remains a concern. Here we report that platinum nanoparticles supported on graphite-rich boron carbide show a 50-100% increase in activity in acidic media and improved cycle stability compared to commercial c...

2015
Felicia R. Lucci Jilei Liu Matthew D. Marcinkowski Ming Yang Lawrence F. Allard Maria Flytzani-Stephanopoulos E. Charles H. Sykes

Platinum is ubiquitous in the production sectors of chemicals and fuels; however, its scarcity in nature and high price will limit future proliferation of platinum-catalysed reactions. One promising approach to conserve platinum involves understanding the smallest number of platinum atoms needed to catalyse a reaction, then designing catalysts with the minimal platinum ensembles. Here we design...

2017
Jing Liu Menggai Jiao Lanlu Lu Heather M Barkholtz Yuping Li Ying Wang Luhua Jiang Zhijian Wu Di-Jia Liu Lin Zhuang Chao Ma Jie Zeng Bingsen Zhang Dangsheng Su Ping Song Wei Xing Weilin Xu Ying Wang Zheng Jiang Gongquan Sun

For the large-scale sustainable implementation of polymer electrolyte membrane fuel cells in vehicles, high-performance electrocatalysts with low platinum consumption are desirable for use as cathode material during the oxygen reduction reaction in fuel cells. Here we report a carbon black-supported cost-effective, efficient and durable platinum single-atom electrocatalyst with carbon monoxide/...

2015
David R. Sellick David J. Morgan Jean-François Lamonier

A range of catalysts comprising of platinum supported on silica, prepared by an impregnation method, have been studied for the total oxidation of naphthalene, which is a representative Polycyclic Aromatic Hydrocarbon. The influence of platinum loading and calcination temperature on oxidation activity was evaluated. Increasing the platinum loading up to 2.5 wt.% increased the catalyst activity, ...

2005
H. Sagert

Catalysts using suitably supported platinum show promise for the commercial production of heavy water. Carbons are potential primary supports for the platinum and metal-support interactions have been observed in this system. These interactions lower the chemical activation energy and increase the rate of reaction under conditions where it seems likely that the support donates electrons to the m...

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