October 28, 2020
Journal Article

Electrocatalytic Hydrogenation of Biomass-Derived Organics: A review


Sustainable energy generation calls for a shift away from centralized, high-temperature, energy-intensive processes to decentralized, low-temperature conversions that can be powered by electricity produced from renewable sources. Electrocatalytic conversion of biomass-derived feedstocks would allow carbon recycling of distributed, energy-poor resources in the absence of sinks and sources of high-grade heat. Selective, efficient electrocatalysts that operate at low temperatures are needed for electrocatalytic hydrogenation (ECH) to upgrade the feedstocks. For effective generation of energy-dense chemicals and fuels, two design criteria must be met: (i) a high H:C ratio via ECH to allow for high-quality fuels and blends, and (ii) a lower O:C ratio in the target molecules via electrochemical decarboxylation/deoxygenation to improve the stability of fuels and chemicals. The goal of this review is to determine whether the following questions have been sufficiently answered in open literature, and if not, what additional information is required: (1) What organic functionalities are accessible for electrocatalytic hydrogenation under a set of reaction conditions? How do substitutions and functionalities impact the activity and selectivity of ECH? (2) What material properties cause an electrocatalyst to be active for ECH? Can general trends in ECH be formulated based on the type of electrocatalyst? (3) What is the impact of reaction (electrolyte concentration, pH, operating potential) and reactor type conditions?

Revised: December 3, 2020 | Published: October 28, 2020


Akhade S.A., N. Singh, O.Y. Gutierrez-Tinoco, J.A. Lopez-Ruiz, H. Wang, J.D. Holladay, and Y. Liu, et al. 2020. Electrocatalytic Hydrogenation of Biomass-Derived Organics: A review. Chemical Reviews 120, no. 20:11370-11419. PNNL-SA-155470. doi:10.1021/acs.chemrev.0c00158