Electrochemical reforming of ethanol with acetate Co-Production on nickel cobalt selenide nanoparticles
Li, Junshan (University of Electronic Science and Technology of China)
Wang, Xiang (Institut de Recerca en Energia de Catalunya)
Xing, Congcong (Institut de Recerca en Energia de Catalunya)
Li, Luming (Chengdu University. Institute of Advanced Study)
Mu, Shijia (University of Electronic Science and Technology of China)
Han, Xu (Institut Català de Nanociència i Nanotecnologia)
He, Ren (Institut de Recerca en Energia de Catalunya)
Liang, Zhifu (Institut Català de Nanociència i Nanotecnologia)
Martínez-Alanis, Paulina R.. (Institut Català de Nanociència i Nanotecnologia)
Yi, Yunan (University of Electronic Science and Technology of China)
Wu, Qianbao (University of Electronic Science and Technology of China)
Pan, Huiyan (Nanyang Institute of Science and Technology)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Cui, Chunhua (University of Electronic Science and Technology of China)
Zhang, Yu (Institut de Recerca en Energia de Catalunya)
Cabot, Andreu (Institució Catalana de Recerca i Estudis Avançats)

Data:	2022
Resum:	The energy efficiency of water electrolysis is limited by the sluggish reaction kinetics of the anodic oxygen evolution reaction (OER). To overcome this limitation, OER can be replaced by a less demanding oxidation reaction, which in the ideal scenario could be even used to generate additional valuable chemicals. Herein, we focus on the electrochemical reforming of ethanol in alkaline media to generate hydrogen at a Pt cathode and acetate as a co-product at a NiCoSe anode. We first detail the solution synthesis of a series of NiCoSe electrocatalysts. By adjusting the Ni/Co ratio, the electrocatalytic activity and selectivity for the production of acetate from ethanol are optimized. Best performances are obtained at low substitutions of Ni by Co in the cubic NiSe phase. Density function theory reveals that the Co substitution can effectively enhance the ethanol adsorption and decrease the energy barrier for its first step dehydrogenation during its conversion to acetate. However, we experimentally observe that too large amounts of Co decrease the ethanol-to-acetate Faradaic efficiency from values above 90% to just 50 %. At the optimized composition, the NiCoSe electrode delivers a stable chronoamperometry current density of up to 45 mA cm, corresponding to 1. 2 A g, in a 1 M KOH + 1 M ethanol solution, with a high ethanol-to-acetate Faradaic efficiency of 82. 2% at a relatively low potential, 1. 50 V vs. RHE, and with an acetate production rate of 0. 34 mmol cm−2 h−1.
Ajuts:	Ministerio de Ciencia e Innovación PID2020-116093RB-C43 Ministerio de Economía y Competitividad ENE2016-77798-C4-3-R Ministerio de Economía y Competitividad SEV-2013-0295 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327
Nota:	Altres ajuts: IREC and ICN2 are funded by the CERCA Programme / Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science PhD program.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Matèria:	Electrocatalysis ; Ethanol reforming ; Hydrogen production ; Selenide nanoparticle ; Acetate
Publicat a:	Chemical engineering journal, Vol. 440 (Jul.2022) , art. 135817, ISSN 1873-3212

DOI: 10.1016/j.cej.2022.135817

Preprint 29 p, 1.4 MB

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