Tuning the Selective Adsorption Site of Biomass on Co₃O₄ by Ir Single Atoms for Electrosynthesis

Abstract

The electrosynthesis from 5‐hydroxymethylfurfural (HMF) is considered a green strategy to achieve biomass‐derived high‐value chemicals. As the molecular structure of HMF is relatively complicated, understanding the HMF adsorption/catalysis behavior on electrocatalysts is vital for biomass‐based electrosynthesis. The electrocatalysis behavior can be modulated by tuning the adsorption energy of the reactive molecules. In this work, the HMF adsorption behavior on spinel oxide, Co3O4 is discovered. Correspondingly, the adsorption energy of HMF on Co3O4 is successfully tuned by decorating with single‐atom Ir. It is observed that compared with bare Co3O4, single‐atom‐Ir‐loaded Co3O4 (Ir‐Co3O4) can enhance adsorption with the CC groups of HMF. The synergetic adsorption can enhance the overall conversion of HMF on electrocatalysts. With the modulated HMF adsorption, the as‐designed Ir‐Co3O4 exhibits a record performance (with an onset potential of 1.15 VRHE) for the electrosynthesis from HMF.

Synergetic Metal Defect and Surface Chemical Reconstruction into NiCo2S4/ZnS Heterojunction to Achieve Outstanding Oxygen Evolution Performance

“…[1] However,t he key reaction processes of oxygen evolution reaction (OER) still suffer from both intrinsically sluggish kinetics and low efficiencies problems. [2] Precious metalbased materials,s uch as Ru/IrO x ,a re developed as the most efficient electrocatalysts for OER, while the prohibitively high cost and scarcity have impeded their wide-scale applications. [3] Therefore,t he development of high activity,l ow cost, and large reserves non-precious-metal catalysts is imperative and urgent.…”

Electrocatalytic upcycling of polyethylene terephthalate to commodity chemicals and H2 fuel

“…Electrocatalysis can be powered by renewable energy (solar, wind, and hydro) that represents a sustainable and attractive strategy to generate clean H 2 from water at cathode and valueadded oxygenates from organic compounds at anode under mild conditions [18][19][20][21] . It has obtained great advancements in efficient and selective transformation of various organic compounds, such as simple alcohols and renewable biomass-derived oxygenates, and varieties of valuable carbonyl chemicals such as formate 22,23 , acetate 24,25 , 2,5-furandicarboxylate 26 , adipate 19 can be obtained. However, the electrocatalytic reforming of PET waste into valuable products is largely unexplored.…”

Unraveling the role of oxygen vacancy in the electrooxidation of 5-hydroxymethyfurfural on Co3O4

“…5c). 22 Thus, the Vo-Co 3 O 4 showed a higher yield (91.9%) and faradaic e ciency (88.1%) than Co 3 O 4 (86.7% and 83.3%). Furthermore, the Vo-Co 3 O 4 electrode also displayed a good stability for HMFOR (Supplementary Fig.…”

“…Moreover, unlike OER, for which only OHadsorbed is involved, the competitive adsorption between OHand HMF molecules occurs on the limited reaction sites for HMFOR, leading to less e cient catalysis. 22 Therefore, developing an effective strategy to address the adsorption competition on catalysts at the atomic level is essential for the rational design of e cient electrocatalysts.…”