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Polymers of intrinsic microporosity in electrocatalysis: Novel pore rigidity effects and lamella palladium growth

Xia, Fengjie, Pan, Mu, Mu, Shichun, Malpass-Evans, Richard, Carta, Mariolino, McKeown, Neil B., Attard, Gary Anthony, Brew, Ashley, Morgan, David John and Marken, Frank 2014. Polymers of intrinsic microporosity in electrocatalysis: Novel pore rigidity effects and lamella palladium growth. Electrochimica Acta 128 , pp. 3-9. 10.1016/j.electacta.2013.08.169

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Abstract

Two polymers (i) the polymer of intrinsic microporosity (or PIM) ethanoanthracene TB-PIM (P1, PIM-EA-TB, MW 70 kDa, BET surface area 1027 m2 g−1) and (ii) the structurally less rigid polymer based on dimethyldiphenylmethane units (P2, BDMPM-TB, MW 100 kDa, BET surface area 47 m2g−1) are compared to highlight the benefits of the newly emerging PIM membrane materials in electrocatalysis and nanostructure formation. Binding sites and binding ability/capacity in aqueous environments are compared in films deposited onto glassy carbon electrodes for (i) indigo carmine dianion immobilisation (weakly binding from water–ethanol) and (ii) PdCl42− immobilisation (strongly binding from acidic media). Nano-lamella growth for Pd metal during electro-reduction of PdCl42− is observed. Electrocatalytic oxidation of formic acid (at pH 6) is investigated for P1 and P2 as a function of film thickness. The more rigid high BET surface area PIM material P1 exhibits “open-pore” characteristics with much more promising electrocatalytic activity at Pd lamella within polymer pores.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Microporosity; Nanostructure; Fuel cell; Formic acid; Electrocatalysis
Publisher: Elsevier
ISSN: 0013-4686
Funders: EPSRC
Last Modified: 18 Feb 2019 11:43
URI: http://orca-mwe.cf.ac.uk/id/eprint/59985

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