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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 ORCID:, Hammond, Ceri ORCID:, Villa, Alberto and Dimitratos, Nikolaos ORCID: 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: 22 Oct 2023 10:42

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