Developing electrochemical hydrogenation towards industrial application

Abstract

Electrochemical hydrogenation reactions hold the promise of more sustainable production routes for towards bulk and fine chemicals. Their broad applicability, reactor concepts, achieved milestones and future perspectives are described herein.

Aqueous Electrocatalytic Reduction as a Low‐Carbon and Green Route for Chemical Synthesis and Environmental Remediation

“…Generally, the electrochemical reduction can be conducted in three different types of reactors, including H-type cells, flow cells, and zero-gap cells (Figure 2). [20] H-type cells are ideal for the lab-scale experiments due to their simple set-up with low electrolyte volume and easy product analysis. [20] Nevertheless, the operation of H-type cells is often limited by (i) high ohmic loss due to the relatively long distance between the anode and cathode and (ii) mass transfer-associated low achievable current densities and conversion, especially for the electrochemical reduction of gas species with low solubility (e. g., CO 2 and N 2 ).…”

“…[20] H-type cells are ideal for the lab-scale experiments due to their simple set-up with low electrolyte volume and easy product analysis. [20] Nevertheless, the operation of H-type cells is often limited by (i) high ohmic loss due to the relatively long distance between the anode and cathode and (ii) mass transfer-associated low achievable current densities and conversion, especially for the electrochemical reduction of gas species with low solubility (e. g., CO 2 and N 2 ). [21] The use of flow cells can mitigate the issues of ohmic loss and mass-transfer limitation found in the H-type cells, and therefore, be suitable for industrially-relevant applications.…”

Navigating through Complexity: Optimizing Cathodes for Organic Electrohydrogenation through Coherent Workflows

“…This family of metal-rich chalcogenides was previously shown to provide promising performance in the semi-hydrogenation of CÀ Cmultiple bonds and is therefore selected as an earth-abundant catalyst for the electrochemical hydrogenation of phenylacetylene as a model reaction. [7,8,10] The binders chosen were Nafion, Aquivion, PTFE, and a mixture of PTFE and MC to analyze the impact of long-sidechain and short-sidechain perfluorinated sulfonic acid ionomers, respectively, which are amphiphilic, and PTFE, which is hydrophobic. Additionally, the impact of a hydrophilic stabilizing agent such as MC on the electrochemical performance was also investigated.…”

“…The main ECH reactor types can be divided into H-type cells, flow cells, and zero-gap cells, with each cell representing different maturity stages of an ECH process. [10] H-type reactors are the primary reactors for standard laboratory experiments on small scales due to their inexpensive and modular character. This cell design offers quick insights into catalyst activity or electrolyte composition effects, among others.…”

Synergistic enhancement of electrocatalytic nitroarene hydrogenation over Mo2C@MoS2 heteronanorods with dual active-sites

“…, carbonyl, nitro, alkenyl, etc. ) under ambient conditions, 4–9 avoiding harsh operations associated with high temperature and H 2 pressure adopted in thermocatalysis. For example, the reduction of nitroarenes to anilines is significant for manufacturing medicine, dyes, spices, and explosives.…”