Avoiding Pitfalls in Comparison of Activity and Selectivity of Solid Catalysts for Electrochemical HMF Oxidation

ChemistryOpen

Prof. Dr. Stefan Rosiwal¹  Dr. Hanadi Ghanem¹  Dr. Nils Rockstroh²  Prof. Dr. Angelika Brückner²  Prof. Dr. Bastian J. M. Etzold³  Timothy Nowak³  Sebastian Wöllner³  Dr. Gui‐Rong Zhang³ 

[1] Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Friedrich-Alexander-Universität Erlangen-Nürnberg 91058 Erlangen Germany Martensstraße 5;Leibniz Institut für Katalyse e.V. (LIKAT Rostock) 18059 Rostock Germany Albert-Einstein-Straße 29a;Technical University of Darmstadt Department of Chemistry Ernst-Berl-Institut für Technische und Makromolekulare Chemie Alarich-Weiss-Straße 8 64287 Darmstadt Germany;

关键词: comparison of electrocatalysts;    electrocatalysis;    HMF oxidation;    measurement protocol;   

DOI  :  10.1002/open.202100072

来源: DOAJ

【 摘 要 】

Abstract Electrocatalytic oxidation of 5‐hydroxymethylfurfural (HMF) offers a renewable approach to produce the value‐added platform chemical 2,5‐furandicarboxylic acid (FDCA). The key for the economic viability of this approach is to develop active and selective electrocatalysts. Nevertheless, a reliable catalyst evaluation protocol is still missing, leading to elusive conclusions on criteria for a high‐performing catalyst. Herein, we demonstrate that besides the catalyst identity, secondary parameters such as materials of conductive substrates for the working electrode, concentration of the supporting electrolyte, and electrolyzer configurations have profound impact on the catalyst performance and thus need to be optimized before assessing the true activity of a catalyst. Moreover, we highlight the importance of those secondary parameters in suppressing side reactions, which has long been overlooked. The protocol is validated by evaluating the performance of free‐standing Cu‐foam, and CuCoO modified with NaPO2H2 and Ni, which were immobilized on boron‐doped diamond (BDD) electrodes. Recommended practices and figure of merits in carefully evaluating the catalyst performance are proposed.

【 授权许可】

Unknown