Synergistic Roles of the CoO/Co Heterostructure and Pt Single Atoms for High-Efficiency Electrocatalytic Hydrogenation of Lignin-Derived Bio-Oils

Electrochemical hydrogeneration (ECH) of biomass-derived platform molecules, which avoids the disadvantages in utilizing fossil fuel and gaseous hydrogen, is a promising route toward value-added chemicals production. Herein, we reported a CoO/Co heterostructure-supported Pt single atoms electrocatalyst (Pt1-CoO/Co) that exhibited an outstanding performance with a high conversion (>99%), a high Faradaic efficiency (87.6%), and robust stability (24 recyclability) at −20 mA/cm2 for electrochemical phenol hydrogenation to high-valued KA oil (a mixture of cyclohexanol and cyclohexanone). Experimental results and the density functional theory calculations demonstrated that Pt1-CoO/Co presented strong adsorption of phenol and hydrogen on the catalyst surface simultaneously, which was conducive to the transfer of the adsorbed hydrogen generated on the single atom Pt sites to activated phenol, and then, ECH of phenol with high performance was achieved instead of the direct hydrogen evolution reaction. This work described that the multicomponent synergistic single atom catalysts could effectively accelerate the ECH of phenol, which could help the achievement of large-scale biomass upgrading

The productivity of recombinant clones.

<p>*compared with 1q13 signals group, p<0.05.</p

Three representative clones with hVR1 integration feature.

<p>Arrows indicate hVR1 genes located on the long arm of chromosome 1 (A), the long arm of chromosome Z3 (B) and the long arm of chromosome Z4 (C).</p

Estimation of the hVR1 gene copy number.

<p>Estimation of the hVR1 gene copy number.</p

The productivity of four clones during long-term culturing.

<p>(a) P30: Passage 30, (b) P80: Passage 80. *compared with pool cell (13 days), p<0.05.</p

FISH chromosomal integration patterns.

<p>(A) Representative clones with single signal distribution in one chromosome, and (B) multi-signals in one or two chromosomes.</p

Chromosomal location 1q13.

<p>Chromosomal location 1q13.</p

FISH signals at the same ends of the long arm of chromosome 1.

<p>FISH signals at the same ends of the long arm of chromosome 1.</p

Comparison of the productivity in four clones and the pooled cells.

<p>*compared with pool cell (13 days), p<0.05.</p

Primer pairs and their production length.

<p>Primer pairs and their production length.</p