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Investigation of the catalytic performance of Pd/CNFs for hydrogen evolution from additive-free formic acid decomposition

Sanchez Trujillo, Felipe Juan, Motta, Davide, Bocelli, Ludovica, Albonetti, Stefania, Roldan Martinez, Alberto, Hammond, Ceri, Villa, Alberto and Dimitratos, Nikolaos 2018. Investigation of the catalytic performance of Pd/CNFs for hydrogen evolution from additive-free formic acid decomposition. C 4 (2) , -. 10.3390/c4020026

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In recent years, research efforts have focused on the development of safe and efficient H2 generation/storage materials toward a fuel-cell-based H2 economy as a long-term solution in the near future. Herein, we report the development of Pd nanoparticles supported on carbon nanofibers (CNFs) via sol-immobilisation and impregnation techniques. Thorough characterisation has been carried out by means of XRD, XPS, SEM-EDX, TEM, and BET. The catalysts have been evaluated for the catalytic decomposition of formic acid (HCOOH), which has been identified as a safe and convenient H2 carrier under mild conditions. The influence of preparation method was investigated and catalysts prepared by the sol-immobilisation method showed higher catalytic performance (PdSI/CNF) than their analogues prepared by the impregnation method (PdIMP/CNF). A high turnover frequency (TOF) of 979 h−1 for PdSI/CNF and high selectivity (>99.99%) was obtained at 30 °C for the additive-free formic acid decomposition. Comparison with a Pd/AC (activated charcoal) catalyst synthesised with sol-immobilisation method using as a support activated charcoal (AC) showed an increase of catalytic activity by a factor of four, demonstrating the improved performance by choosing CNFs as the preferred choice of support for the deposition of preformed colloidal Pd nanoparticles.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Advanced Research Computing @ Cardiff (ARCCA)
Cardiff Catalysis Institute (CCI)
Publisher: MDPI AG
ISSN: 2311-5629
Date of First Compliant Deposit: 14 May 2018
Date of Acceptance: 7 April 2018
Last Modified: 11 Dec 2020 02:31

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