Recent advances in anodic hydrogen production: Electrochemical oxidative dehydrogenation of aldehydes to carboxylates

IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Current Opinion in Electrochemistry Pub Date : 2024-03-14 DOI:10.1016/j.coelec.2024.101484
Nathanael C. Ramos , Adam Holewinski
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Abstract

Electrooxidation of aldehydes to carboxylates has been observed to yield H2 at small anodic potentials on Group IB metal electrodes (mainly Cu, Ag, and Au) in alkaline media. When paired with hydrogen evolution at the cathode, only one mole of electrons is transferred to generate a mole each of hydrogen and carboxylate product. Recently, this phenomenon of electrochemical oxidative dehydrogenation (EOD) has gained renewed interest as it has been demonstrated with biomass-derived substrates at industrially relevant current densities. The high electron efficiency, low cell voltage, and valuable anode products of EOD all give cause for further investigation into its prospects for co-producing renewable hydrogen and organic chemicals. Currently, the underlying mechanism of EOD remains unclear. This contribution reviews the present understanding of the reaction mechanism and highlights notable performance benchmarks to date, emphasizing the role of catalyst material and reaction conditions.

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阳极制氢的最新进展:醛到羧酸盐的电化学氧化脱氢反应
据观察,在碱性介质中的 IB 族金属电极(主要是铜、银和金)上,当阳极电位较低时,醛类电氧化生成羧酸盐会产生氢。在阴极与氢进化配对时,只需转移一摩尔的电子,就能生成一摩尔的氢和羧酸盐产物。最近,这种电化学氧化脱氢(EOD)现象再次引起了人们的兴趣,因为它已在工业相关的电流密度下与生物质衍生基质进行了验证。EOD 的高电子效率、低电池电压和有价值的阳极产品都促使人们进一步研究其联合生产可再生氢气和有机化学品的前景。目前,EOD 的基本机制仍不清楚。本文回顾了目前对该反应机理的理解,并强调了催化剂材料和反应条件的作用,重点介绍了迄今为止显著的性能基准。
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来源期刊
Current Opinion in Electrochemistry
Current Opinion in Electrochemistry Chemistry-Analytical Chemistry
CiteScore
14.00
自引率
5.90%
发文量
272
审稿时长
73 days
期刊介绍: The development of the Current Opinion journals stemmed from the acknowledgment of the growing challenge for specialists to stay abreast of the expanding volume of information within their field. In Current Opinion in Electrochemistry, they help the reader by providing in a systematic manner: 1.The views of experts on current advances in electrochemistry in a clear and readable form. 2.Evaluations of the most interesting papers, annotated by experts, from the great wealth of original publications. In the realm of electrochemistry, the subject is divided into 12 themed sections, with each section undergoing an annual review cycle: • Bioelectrochemistry • Electrocatalysis • Electrochemical Materials and Engineering • Energy Storage: Batteries and Supercapacitors • Energy Transformation • Environmental Electrochemistry • Fundamental & Theoretical Electrochemistry • Innovative Methods in Electrochemistry • Organic & Molecular Electrochemistry • Physical & Nano-Electrochemistry • Sensors & Bio-sensors •
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